CN101360912A - Installation structure for fuel injection valve and fuel injection system - Google Patents

Abstract

Provided is an mounting structure of a fuel injection valve and a fuel injection system. An end portion, on the combustion chamber side, of a fuel injection valve is projected from a position of a wall surface forming an intake port, whose position is superposed on an imaginary plane that passes a wall surface from which an intake valve projects and is normal to the center axis of a cylinder, or is projected from the imaginary plane to the combustion chamber side. Alternatively, the center of an end portion, on the fuel injection side, of a fuel injection valve for injecting fuel to intake air flowing in a branch port branched from an intake port is placed closer to the center axis side, in the radial direction of the cylinder, of a cylinder than to the center axis of an intake valve. Alternatively, an upstream side fuel injection valve injects fuel to intake air flowing at an intake port, and a down stream side fuel injection valve injects fuel to intake air flowing at a branch port branched from an intake port. Alternatively, the amount of injection of fuel is controlled for each fuel injection valve for injecting fuel to intake air flowing at a branch port branched from an intake port.

Description

The mounting construction of Fuelinjection nozzle and fuel injection system

The cross reference of related application

The present invention requires the preference of 2006-136467 that applies in the Japanese patent application 2006-89704 that applied on March 29th, 2006, the 2006-89711 of application on March 29th, 2006, the 2006-89715 of application on March 29th, 2006, on May 16th, 2006 and the 2007-70191 that applied on March 19th, 2007, and its disclosure is introduced the application as reference.

Technical field

The present invention relates to mounting construction, and the fuel injection system of the Fuelinjection nozzle of burner oil in being inhaled into internal-combustion engine air-breathing.

Background technique

JP-2004-225598-A and US-2004/0164187-A1 corresponding, DE-2004003361-A1 with it, disclose each firing chamber have a plurality of bifurcations internal-combustion engine (hereinafter referred to as motor), in flowing through each bifurcations air-breathing the fuel injection system of burner oil.In JP-2004-225598-A and the disclosed technology of US-2004/0164187-A1 corresponding with it, DE-2004003361-A1,2 injected fuel spraies that Fuelinjection nozzle forms are distributed to 2 bifurcations.So, by forming 2 injected fuel spraies, can reduce fuel adhering to the wall portion of cutting apart 2 bifurcations from Fuelinjection nozzle.

Yet, JP-2004-225598-A with and the disclosed technology of corresponding US-2004/0164187-A1, DE-2004003361-A1 in, carry in bifurcations discretely Fuelinjection nozzle and firing chamber.Therefore, according to the difference of the shape of bifurcations, may be from the fuel of fuel injection valves inject attached on the wall that forms bifurcations.And, in a firing chamber and fuel injection system that a plurality of intakepories are communicated with, under the situation of Fuelinjection nozzle being carried at the point of branching upstream side of intakeport, from the fuel deposition of fuel injection valves inject to the next door that is arranged on each intakeport.So, when fuel deposition was on the wall of formation intakeport, fuel was promoted that pelletizing just flows directly into the firing chamber.Hindered micronized fuel in the firing chamber, not burn, but discharged from motor as unburned hydrocarbon (HC).As a result, there is the problem that unburned HC increases and specific fuel consumption worsens that causes in the waste gas.

Therefore, become the wall of bifurcations to adhere to, can consider Fuelinjection nozzle to be set at each intakeport in order to prevent the fuel synform.But, be assigned to the air-breathing of intakeport and further flow into the firing chamber via bifurcations.Therefore, the air-breathing flow that flows through bifurcations reduces.Thus, when when each bifurcations is provided with Fuelinjection nozzle,, need matches with inspiratory flow and reduce fuel injection amount from Fuelinjection nozzle in order to promote the pelletizing of fuel.But if when reducing fuel injection amount from each Fuelinjection nozzle of being arranged on intakeport, then when increasing the output of motor, existence can not be guaranteed the problem of desired fuel flow rate.

And, as JP-2003-262174-A, JP-2003-262175-A and JP-2004-232463-A etc. are disclosed, in the jet-type fuel injection system of hole, Fuelinjection nozzle is configured on the central shaft of the Aspirating valves that the end to the fuel chambers side opens and closes.

In having the motor of a plurality of Aspirating valvess, the end of the combustion chamber side of intakeport branches into the bifurcations more than 2 corresponding to each Aspirating valves, therefore when when on the bifurcations of intakeport branch, respectively Fuelinjection nozzle being set, from the injected fuel spray of fuel injection valves inject owing to the air-breathing deflection that produces that flows through bifurcations.

For example, when an intakeport branched into two bifurcations, bifurcations branched into roughly Y font from intakeport, and to the inner circle wall lateral bending song of the housing that forms cylinder.Therefore, the inspiratory airflow that flows into the firing chamber from intakeport via bifurcations forms, towards the inner circle wall side of cylinder.As a result, when the injects fuel from the central shaft that is arranged on Aspirating valves, injected fuel spray is along with the inspiratory airflow that flows through bifurcations is transported to the inner circle wall side.Thus, from the injected fuel spray of fuel injection valves inject easily on the inner circle wall attached to the housing that forms cylinder.

Being attached to fuel on the inner circle wall of housing becomes drop and is helpless to burning in the firing chamber, and is discharged to the outside of motor as unburned hydrocarbon.Therefore, may cause increasing and the deterioration of specific fuel consumption from the hydrocarbon that motor is discharged.

JP-2000-234579-A and US-6308684-B1 corresponding with it also disclose a kind of each firing chamber and have had the fuel injection system of the motor of a plurality of intakepories, and this fuel injection system is burner oil in flowing through each intakeport air-breathing.In this technology, 2 injected fuel spraies that Fuelinjection nozzle forms are assigned to 2 intakepories.So, by forming 2 injected fuel spraies, can reduce fuel adhering to the wall portion of cutting apart 2 intakepories from Fuelinjection nozzle.

So, when a firing chamber is communicated with plural intakeport, sometimes the internal diameter difference of each intakeport, be arranged at each intakeport Aspirating valves the lift amount difference or flow through the inspiratory flow difference of each intakeport.In these cases, in JP-2000-234579-A and the disclosed technology of US-6308684-B1 corresponding, asymmetricly dispose the spray orifice of Fuelinjection nozzle, and set the distribution ratio of the fuel that sprays to each intakeport with it.

Yet in motor in recent years, for example have following situation, promptly the load according to motor stops switching of Aspirating valves arbitrarily or change lift amount in a plurality of Aspirating valvess.At this moment, the inspiratory flow that flows through each intakeport changes according to the lift amount of Aspirating valves.In JP-2000-234579-A and the disclosed technology of US-6308684-B1 corresponding with it, promptly allow to each intakeport is distributed fuel, can not change the distribution ratio of the fuel that sprays to each intakeport.Therefore, when the inspiratory flow that flows through each intakeport when the difference owing to engine load changes, be trapped in the intakeport from the part of the fuel of fuel injection valves inject.The fuel that is trapped in intakeport is helpless to the burning in the firing chamber.As a result, the problem that has the specific fuel consumption deterioration that causes motor.And, be trapped in the fuel in the intakeport, when leaving valve, Aspirating valves keeps flowing in the firing chamber liquidly.Therefore the problem that exists is, the burning of fuel is insufficient, and the unburned hydrocarbon (HC) of discharging from motor increases.

Summary of the invention

In view of the foregoing, the object of the present invention is to provide a kind of mounting construction of Fuelinjection nozzle, reduce the unburned HC that waste gas contained.

And other purpose of the present invention is to provide a kind of fuel injection system, reduces the unburned HC that waste gas contained and improves specific fuel consumption.

And another other purpose of the present invention is to provide a kind of fuel injection system, realizes guaranteeing the pelletizing of required flow fuel and fuel simultaneously.

The mounting construction of the Fuelinjection nozzle that one aspect of the present invention is related is used for internal-combustion engine, and this internal-combustion engine has: the firing chamber is formed in cylinder to the piston end face side that axially moves back and forth; Intakeport flows through and is inhaled into the air-breathing of above-mentioned firing chamber; And Aspirating valves, open and close between above-mentioned Aspirating valves and the above-mentioned firing chamber; This Fuelinjection nozzle is burner oil in flowing through intakeport air-breathing.The end of the above-mentioned combustion chamber side of above-mentioned Fuelinjection nozzle is positioned at the position that overlaps with imaginary plane, perhaps compares to above-mentioned combustion chamber side outstanding with above-mentioned imaginary plane; This imaginary plane by in the wall that forms above-mentioned intakeport, the outstanding wall of above-mentioned Aspirating valves, and be orthogonal to the central shaft of above-mentioned cylinder.

The related fuel injection system of other aspects of the present invention is to have: cylinder block forms cylinder; Piston can reciprocatingly be supported in the above-mentioned cylinder; Cylinder head is equipped on above-mentioned cylinder block, and above-mentioned cylinder block and above-mentioned piston between form the firing chamber, and have the intakeport that can be communicated with above-mentioned firing chamber; Aspirating valves connects above-mentioned cylinder head, opens and closes the end of the above-mentioned combustion chamber side of above-mentioned intakeport; And Fuelinjection nozzle, be arranged on the above-mentioned cylinder head burner oil in flowing through above-mentioned intakeport air-breathing.The end of the above-mentioned combustion chamber side of above-mentioned Fuelinjection nozzle is positioned at the position that overlaps with imaginary plane, perhaps compares to above-mentioned combustion chamber side outstanding with above-mentioned imaginary plane; In the wall of the above-mentioned cylinder head of this imaginary plane by forming above-mentioned intakeport, the outstanding wall of above-mentioned Aspirating valves, and be orthogonal to the central shaft of above-mentioned cylinder.

The mounting construction of the Fuelinjection nozzle that another other aspects of the present invention are related is used for this internal-combustion engine of internal-combustion engine and has: the firing chamber is formed in cylinder to the piston end face side that axially moves back and forth; Intakeport flows through and is inhaled into the air-breathing of above-mentioned firing chamber, and the end of above-mentioned combustion chamber side branches into a plurality of bifurcations; And Aspirating valves, open and close the end of the above-mentioned combustion chamber side of each above-mentioned bifurcations; This Fuelinjection nozzle is arranged at the air-breathing middle burner oil that the bifurcations co-current flow is crossed each bifurcations respectively.The center of the end of the combustion jet side of above-mentioned Fuelinjection nozzle is configured to, and upwards compares the central shaft side near above-mentioned cylinder with the central shaft of above-mentioned Aspirating valves in the footpath of above-mentioned cylinder.

The related fuel injection system in another other aspects of the present invention is to have: the piston that moves back and forth; Housing has the cylinder that can reciprocatingly support above-mentioned piston, and forms the firing chamber in above-mentioned piston end face side; Intakeport flows through and is inhaled into the air-breathing of above-mentioned firing chamber, and the end of above-mentioned combustion chamber side branches into a plurality of bifurcations; Aspirating valves is arranged at each above-mentioned bifurcations, opens and closes the end of the above-mentioned combustion chamber side of above-mentioned bifurcations; And Fuelinjection nozzle, be arranged at each above-mentioned bifurcations, the center of the end of fuel ejection side is configured to, and upwards compares the central shaft side near above-mentioned cylinder with the central shaft of above-mentioned Aspirating valves in the footpath of above-mentioned cylinder, burner oil in flowing through above-mentioned bifurcations air-breathing.

The related fuel injection system in another other aspects of the present invention is to have: intakeport, flow through to each cylinder distribute air-breathing; Bifurcations is more than 2 from the branching portion branch of the combustion chamber side that is arranged at above-mentioned intakeport; The upstream side Fuelinjection nozzle is compared the opposition side that is arranged at above-mentioned bifurcations with the above-mentioned branching portion of above-mentioned intakeport, can be in flowing through above-mentioned intakeport air-breathing burner oil; And the downstream side Fuelinjection nozzle, be arranged at above-mentioned bifurcations respectively, can be in flowing through above-mentioned bifurcations air-breathing burner oil.

The related fuel injection system in another other aspects of the present invention is to have: the intakeport more than 2 that is communicated in the firing chamber; Aspirating valves is separately positioned on the end of the above-mentioned intakeport more than 2, opens and closes between above-mentioned intakeport and the above-mentioned firing chamber; Fuelinjection nozzle is arranged at the above-mentioned intakeport more than 2 respectively, burner oil in flowing through above-mentioned intakeport air-breathing; And the emitted dose control unit, to each above-mentioned Fuelinjection nozzle control fuel injection amount.

Description of drawings

Fig. 1 has used the sectional view of the internal-combustion engine of the mounting construction of Fuelinjection nozzle of the present invention's the 1st mode of execution and fuel injection system for expression.

Fig. 2 has used the sectional view of summary of major component of the internal-combustion engine of the mounting construction of Fuelinjection nozzle of the 1st mode of execution and fuel injection system for expression.

Fig. 3 has used the schematic representation of the configuration of the intakeport of internal-combustion engine of the mounting construction of Fuelinjection nozzle of the 1st mode of execution and fuel injection system and Fuelinjection nozzle for expression.

Fig. 4 (A) has used the mounting construction of Fuelinjection nozzle of the present invention's the 2nd mode of execution and schematic representation internal-combustion engine, sprayed fuel of fuel injection system for expression; Fig. 4 (B) is the schematic representation of the relation of the VIB-VIB sectional view of sprayed fuel of Fig. 4 (A) and expression radial position of sprayed fuel and flow proportional.

Fig. 5 (A) has used schematic representation internal-combustion engine, Fuelinjection nozzle and Aspirating valves of the mounting construction of Fuelinjection nozzle of the present invention's the 3rd mode of execution and fuel injection system for expression; Fig. 5 (B) is the Aspirating valves of Fig. 5 (A) and the VB-VB sectional view of sprayed fuel; Fig. 5 (C) is the Aspirating valves of Fig. 5 (A) and the VC-VC sectional view of sprayed fuel.

Fig. 6 (A) has used schematic representation internal-combustion engine, Fuelinjection nozzle and Aspirating valves of the mounting construction of Fuelinjection nozzle of the present invention's the 4th mode of execution and fuel injection system for expression; Fig. 6 (B) is the Aspirating valves of Fig. 6 (A) and the VIB-VIB sectional view of sprayed fuel; Fig. 6 (C) is the Aspirating valves of Fig. 6 (A) and the VIC-VIC sectional view of sprayed fuel.

Fig. 7 is the mounting construction of the Fuelinjection nozzle of expression the 4th mode of execution and the schematic representation of the employed jet orifice plate of fuel injection system.

Fig. 8 is the figure that observes from the arrow VIII direction of Fig. 9, used for expression the mounting construction of Fuelinjection nozzle of the present invention's the 5th mode of execution and fuel injection system internal-combustion engine, from the schematic representation of the position of the Aspirating valves of each bifurcations of intakeport branch and Fuelinjection nozzle.

Fig. 9 has used the sectional view of summary of the internal-combustion engine of the mounting construction of Fuelinjection nozzle of the 5th mode of execution and fuel injection system for expression.

Figure 10 is the partial section of the summary of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of expression the 5th mode of execution and fuel injection system.

Figure 11 is the sectional view of the summary of the front end of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of expression the 5th mode of execution and fuel injection system.

Figure 12 used for expression the mounting construction of Fuelinjection nozzle of the present invention's the 6th mode of execution and fuel injection system internal-combustion engine, from the schematic representation of the position of the Aspirating valves of each bifurcations of intakeport branch and Fuelinjection nozzle.

Figure 13 used for expression the mounting construction of Fuelinjection nozzle of the present invention's the 7th mode of execution and fuel injection system internal-combustion engine, from the schematic representation of the position of the Aspirating valves of each bifurcations of intakeport branch and Fuelinjection nozzle.

Figure 14 is the sectional view of the summary of the front end of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of the variation of expression the present invention the 5th～the 7th mode of execution and fuel injection system.

Figure 15 is the sectional view of the summary of the front end of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of the variation of expression the present invention the 5th～the 7th mode of execution and fuel injection system.

Figure 16 is the sectional view of the summary of the front end of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of the variation of expression the present invention the 5th～the 7th mode of execution and fuel injection system.

Figure 17 is the sectional view of the summary of the front end of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of the variation of expression the present invention the 5th～the 7th mode of execution and fuel injection system.

Figure 18 is the sectional view of the summary of the front end of the Fuelinjection nozzle of the mounting construction of Fuelinjection nozzle of the variation of expression the present invention the 5th～the 7th mode of execution and fuel injection system.

Figure 19 has used the schematic representation of wanting portion summary formation of internal-combustion engine of the fuel injection system of the present invention's the 8th mode of execution for expression.

Figure 20 has used the summary of internal-combustion engine of the fuel injection system of the present invention's the 8th mode of execution to constitute for expression block diagram.

Figure 21 has used the sectional view of summary of internal-combustion engine of the fuel injection system of the present invention's the 8th mode of execution for expression.

Figure 22 (A) has used the skeleton diagram of wanting portion summary formation of internal-combustion engine of the fuel injection system of the present invention's the 9th mode of execution for expression; Figure 22 (B) is the sequential chart in driving period of each Fuelinjection nozzle in expression Figure 22 (A).

Figure 23 has used the summary of internal-combustion engine of the fuel injection system of the present invention's the 9th mode of execution to constitute for expression block diagram.

Figure 24 has used the sectional view of summary of internal-combustion engine of the fuel injection system of the present invention's the 9th mode of execution for expression.

Figure 25 (A) has used the skeleton diagram of wanting portion summary formation of internal-combustion engine of the fuel injection system of the present invention's the 10th mode of execution for expression; Figure 25 (B) is the schematic representation in driving period of each Fuelinjection nozzle in expression Figure 25 (A).

Figure 26 has used the skeleton diagram of wanting portion summary formation of internal-combustion engine of the fuel injection system of the present invention's the 11st mode of execution for expression.

Figure 27 has used the skeleton diagram of wanting portion summary formation of internal-combustion engine of the fuel injection system of the present invention's the 12nd mode of execution for expression.

Figure 28 be illustrated in the internal-combustion engine of the fuel injection system of having used the present invention's the 15th mode of execution, the sequential chart in driving period of each Fuelinjection nozzle and Aspirating valves.

Figure 29 be illustrated in the internal-combustion engine of fuel injection system of the variation of having used the present invention's the 15th mode of execution, the sequential chart in driving period of each Fuelinjection nozzle and Aspirating valves.

Embodiment

Below, the mounting construction and the fuel injection system of the Fuelinjection nozzle of the present invention the 1st～the 4th mode of execution described.

In the mounting construction and fuel injection system of the Fuelinjection nozzle of the 1st～the 4th mode of execution, the end of Fuelinjection nozzle is, by the outstanding wall of Aspirating valves among the wall that forms intakeport, and be positioned at and be orthogonal to the imaginary plane position overlapped of the central shaft of cylinder, perhaps compare to combustion chamber side outstanding with imaginary plane.Thus, can suppress from the fuel deposition of fuel injection valves inject on the wall that forms intakeport.As a result, suppressing the inadequate fuel of pelletizing flows into to fuel chambers.Thus, the fuel from fuel injection valves inject burns fully.Therefore, can reduce unburned HC in the waste gas, and can improve specific fuel consumption.

And, have under the situation of spray orifice in the end of the combustion chamber side of Fuelinjection nozzle, from injects fuel the time, can suppress injected fuel spray attached on the wall on the elongation line that is positioned at injected fuel spray.As a result, suppress the inadequate fuel of pelletizing and flow into fuel chambers.Therefore, can reduce unburned HC in the waste gas.

And the cross section that is configured to the injected fuel spray of being sprayed at spray orifice is under the situation of tubular, forms the spraying of tubular from the fuel of fuel injection valves inject.Therefore, in the time of between open intakeport of Aspirating valves and firing chamber, flow into the firing chamber via the peripheral side of Aspirating valves from the fuel of fuel injection valves inject.As a result,, reduce not only to the minimizing of adhering to of the wall that forms intakeport from the fuel of fuel injection valves inject to adhering to also of Aspirating valves.Thus, suppress the inadequate fuel of pelletizing and flow into the firing chamber.Therefore, can reduce unburned HC in the waste gas.

And the cross section that is configured to the injected fuel spray of being sprayed at spray orifice is under the situation of elliptical shape, and forming the cross section from the fuel of fuel injection valves inject is elliptoid spraying.Therefore, in the time of between Aspirating valves exploitation intakeport and firing chamber, from the fuel of fuel injection valves inject via the profile of Aspirating valves for flowing into the firing chamber around the valve portion of circle.As a result,, reduce not only to the minimizing of adhering to of the wall that forms intakeport from the fuel of fuel injection valves inject to the adhering to also of valve portion of Aspirating valves.Thus, suppress the inadequate fuel of pelletizing and flow into the firing chamber.Therefore, can reduce unburned HC in the waste gas.

And, under the situation of the sectional shape that is configured to the injected fuel spray of being sprayed at spray orifice for C font roughly, form the tubular spraying that lacks a circumferential part from the fuel of fuel injection valves inject.And the axial region of Aspirating valves is positioned on the elongation line that lacks part of spraying.Therefore, between open intakeport of Aspirating valves and firing chamber, avoid the axial region of Aspirating valves from the fuel of fuel injection valves inject, and via flowing into the firing chamber around the valve portion.As a result,, reduce not only to the minimizing of adhering to of the wall that forms intakeport from the fuel of fuel injection valves inject to adhering to also of Aspirating valves axial region and valve portion.Thus, suppress the inadequate fuel of pelletizing and flow into the firing chamber.Therefore, can reduce the unburned HC in the waste gas, and can improve specific fuel consumption.

And, be arranged at respectively at Fuelinjection nozzle under the situation of the intakeport more than 2, from the fuel of the fuel injection valves inject that is arranged at each intakeport, to forming reducing adhering to all of wall of intakeport, and the inflow firing chamber.Thus, suppress the inadequate fuel of pelletizing and flow into the firing chamber.Therefore, can reduce the unburned HC in the waste gas, and can improve specific fuel consumption.

And, be respectively arranged with at the intakeport more than 2 under the situation of a plurality of Fuelinjection nozzles, for example can spray an amount of fuel according to inspiratory flow or engine condition.

Fig. 1 and Fig. 2 have represented to use the mounting construction of Fuelinjection nozzle of the present invention's the 1st mode of execution and the internal-combustion engine (motor) of fuel injection system.Motor 10 for example is gasoline-fueled petrol engine.In addition, fuel can for example be alcohol etc. also.

Motor 10 has cylinder block 11 and cylinder head 12.Cylinder block 11 is formed with the cylinder 13 of tubular.Motor 10 has one or more cylinders 13.Cylinder 13 inboards contain piston 14.Piston 14 by connecting rod 15 cylinder 13 axially on move back and forth.

Cylinder head 12 is configured in a tip side of cylinder block 11.Cylinder head 12 is formed with intakeport 16 and relief opening 17.Motor 10 has Aspirating valves 40 that runs through cylinder head 12 and open and close intakeport 16 and the outlet valve 50 that opens and closes relief opening 17.

As shown in Figure 2, Aspirating valves 40 passes the suction side through hole 18 that forms on the cylinder head 12.Aspirating valves 40 has axial region 14 and valve portion 42.Axial region 41 is supported on the cylinder head 12 that forms suction side through hole 18 slidably across liner 43.An axial end of axial region 41 is connected with valve portion 42, and another end joins across tappet 44 and air inlet cam 45.Valve portion 42 can be in place on the valve seat 46 that forms in intakeport 16 ends on the cylinder head 12.Between cylinder head 12 and tappet 44, be provided with spring (elastic member) 47.Spring 47 is pushed tappet 44 to the direction of leaving from cylinder head 12.Tappet 44 moves integratedly with Aspirating valves 40.Therefore, spring 47 is pushed the valve portion 42 of Aspirating valves 40 to the direction to valve seat 46 in place.

Outlet valve 50 passes the exhaust side through hole 19 that forms on the cylinder head 12.Outlet valve 50 has axial region 51 and valve portion 52.Axial region 51 is supported on the cylinder head 12 that forms exhaust side through hole 19 slidably across liner 53.An axial end of axial region 51 is connected with valve portion 52, and another end joins across tappet 54 and exhaust cam 55.Valve portion 52 can be in place on the valve seat 56 that forms in the end of relief opening 17 on the cylinder head 12.Between cylinder head 12 and tappet 54, be provided with spring (elastic member) 57.Spring 57 is pushed tappet 54 to the direction of leaving from cylinder head 12.Tappet 54 moves integratedly with Aspirating valves 50.Therefore, spring 57 is pushed the valve portion 52 of outlet valve 50 to the direction to valve seat 56 in place.

Being formed with the space that the end face of piston 14 sides of the end face of cylinder head 12 sides of face, piston 14 of cylinder block 11 sides of internal face 13a, cylinder head 12 of the cylinder block 11 of cylinder 13 and outlet valve 50 forms is firing chamber 20.Firing chamber 20 can be communicated with intakeport 16 and relief opening 17.Firing chamber 20 opened and closed with being communicated with by Aspirating valves 40 of intakeport 16.Firing chamber 20 opened and closed with being communicated with by outlet valve 50 of relief opening 17.As shown in Figure 1, intakeport 16 is, is communicated with the air suction way 22 that forms on the end of firing chamber 20 opposition sides and the intake manifold 21.Intake manifold 21 is, is communicated with not shown air-breathing introduction part with the end of firing chamber 20 opposition sides.The air that imports from air-breathing introduction part is for example via not shown air-strainer, closure and pressure stabilizer, and the air suction way that forms from intake manifold 21 supplies to intakeport 16.

Under the situation of present embodiment, as shown in Figure 3, firing chamber 20 is communicated with each intakeport 16 and relief opening 17 of 2 respectively.That is, the motor 10 of present embodiment is so-called 4 valve engines.In addition, the intakeport 16 and the relief opening 17 of motor 10 also can constitute, and respectively each 1 is communicated with firing chamber 20, also can constitute to distinguish to be communicated with firing chamber 20 more than 3.And for example also can make the intakeport 16 that is communicated with firing chamber 20 is that 3, relief opening 17 are that 2 what is called 5 valve engines are such, makes intakeport 16 different with the number of relief opening 17.

As shown in Figure 1, cylinder head 12 has the through-hole section 12a that is communicated with the substantial middle portion of firing chamber 20.Through-hole section 12a axially runs through cylinder head 12 along cylinder 13.Be provided with ignition mechanism 60 among the through-hole section 12a.Ignition mechanism 60 is to constitute one by not shown spark coil and spark plug.The end of the spark plug side of ignition mechanism 60 is exposed in the firing chamber 20.

As shown in Figure 2, cylinder head 12 has the hole portion 24 that is provided with of running through from the inboard, lateral of intakeport 16.Be provided with in the way that hole portion 24 is set at intakeport 16.Be provided with and be provided with Fuelinjection nozzle 70 in the hole portion 24.Fuelinjection nozzle 70 runs through the cylinder head 12 that formation is provided with hole portion 24.Fuelinjection nozzle 70 axial end 70a expose from intakeport 16, and another end is connected with fuel rail 80.Fuelinjection nozzle 70 with the end 70a of fuel rail 80 opposition sides on have spray orifice 71.Fuel rail 80 for example is supported on the cylinder head 12.Never illustrated fuel tank is to fuel rail 80 fuelings.The fuel that Fuelinjection nozzle 70 will supply to fuel rail 80 is ejected in flow intakeport 16 air-breathing from spray orifice 71.Fuelinjection nozzle 70 is according to the injection of the interrupted fuel of electrical signal of illustrated ECU output never.That is, Fuelinjection nozzle 70 is the solenoid valve of the injection of interrupted electrically fuel.Present embodiment as shown in Figure 3 is such, has at motor 10 under the situation of 2 intakepories 16, and Fuelinjection nozzle 70 is arranged at each intakeport 16 respectively.

As shown in Figure 2, Fuelinjection nozzle 70 have an end 70a with spray orifice 71 sides of fuel rail 80 opposition sides, side-prominent to the firing chamber 20 of intakeport 16.Form the cylinder head 12 of intakeport 16,20 have the wall 31 relative with firing chamber 20 than the distally from the firing chamber.The axial region 41 of Aspirating valves 40 is outstanding from this wall 31.That is, the wall 31 of cylinder head 12 is, forms intakeport 16 and supports the end of firing chamber 20 sides of guider of the axial region 41 of Aspirating valves 40 slidably.

Here, the central shaft of the cylinder 13 that forms in the cylinder block 11 is defined as Lc, will vertical with this central axis L c, promptly upwards extends and the plane by wall 31 is defined as imaginary plane Li in the footpath of cylinder 13.At this moment, the end 70a of Fuelinjection nozzle 70 is positioned at the position that overlaps with imaginary plane Li or compares to firing chamber 20 side-prominent with imaginary plane.What represent in Fig. 1 and Fig. 2 is that the end 70a of Fuelinjection nozzle 70 compares with imaginary plane to the side-prominent example in firing chamber 20.The overhang of Fuelinjection nozzle 70 is expressed as the overhang D of Fig. 2.

The end 70a of Fuelinjection nozzle 70 is positioned at the position that overlaps with imaginary plane Li or compares to firing chamber 20 side-prominent with imaginary plane, the area of wall that forms the cylinder head 12 of intakeport 16 thus reduces, and this intakeport 16 is positioned on the elongation line of spray orifice 71 sides of central shaft Ic of Fuelinjection nozzle 70.Therefore, can suppress to adhere to the wall of the cylinder head 12 that forms intakeport 16, and flow into firing chamber 20 from the fuel that the spray orifice 71 of Fuelinjection nozzle 70 sprays.

The fuel that sprays from the spray orifice 71 of Fuelinjection nozzle 70 is turned to vaporific by particulate.When on the wall of the cylinder head 12 that is being formed intakeport 16 by micronized fuel deposition, grow into droplet-like.When the fuel droplet of growing up flowed into firing chamber 20, because pelletizing is insufficient, so the burning of fuel may be not exclusively.As a result, the HC that causes waste gas to comprise increases, and perhaps is helpless to the deterioration of the specific fuel consumption that burnt fuel causes.

On the other hand, under the situation of the motor 10 of the 1st mode of execution, the fuel deposition that can suppress to spray from Fuelinjection nozzle 70 and flows into firing chamber 20 on the wall of the cylinder head 12 that forms intakeport 16.Therefore, can not hinder, make and keep vaporific fuel inflow firing chamber 20 from the pelletizing of the fuel of Fuelinjection nozzle 70 injections.Thus, fuel burning fully in firing chamber 20.Therefore, can reduce the unburned HC in the waste gas, and can improve specific fuel consumption.

Fig. 4 (A), (B) represent the 2nd mode of execution of the present invention.In addition, to giving identical symbol, and omit explanation with the same structure position of the 1st mode of execution.

Under the situation of the 2nd mode of execution, Fuelinjection nozzle 70 is identical with the 1st mode of execution, and end 70a overlaps with imaginary plane Li or compares to firing chamber 20 side-prominent with imaginary plane.And under the situation of the 2nd mode of execution, shown in Fig. 4 (A), (B), Fuelinjection nozzle 70 forms the cone shape injected fuel spray 90 of hollow.The shape of injected fuel spray 90 can be easily set in the configuration of the spray orifice 71 by adjusting Fuelinjection nozzle 70.The injected fuel spray 90 of spraying from the Fuelinjection nozzle 70 of the 2nd mode of execution becomes the coniform of hollow.That is, as shown in Figure 4, in the flow fuel that constitutes injected fuel spray 90, produce to injected fuel spray 90 distribution radially.

Under the situation of the 2nd mode of execution, by making the hollow that is shaped as of the injected fuel spray 90 of spraying from Fuelinjection nozzle 70, when Aspirating valves 40 is opened intakeport 16, between the wall of the cylinder head 12 of valve portion 42 and formation intakeport 16, pass through from the injected fuel spray 90 that Fuelinjection nozzle 70 sprays.Thus, avoid the wall of cylinder head 12 from the fuel that Fuelinjection nozzle 70 sprays, and via the side inflow firing chamber, outside 20 of the valve portion 42 of Aspirating valves 40.Therefore, from the fuel that Fuelinjection nozzle 70 sprays, the limit suppresses to the adhering to of the wall of the cylinder head 12 that forms intakeport 16, to the adhering to of the valve portion 42 of Aspirating valves 40, and the limit flows into firing chamber 20.As a result, can not hinder from the pelletizing of the fuel of Fuelinjection nozzle 70 injections, and vaporific injected fuel spray 90 is kept in 20 inflows to the firing chamber.Thus, fuel fully burning in firing chamber 20.Therefore, can reduce the unburned HC in the waste gas, and can improve specific fuel consumption.

Fig. 5 (A)-(C) represents the 3rd mode of execution of the present invention.In addition, to giving identical symbol, and omit explanation with the same structure position of the 1st mode of execution.

Under the situation of the 3rd mode of execution, Fuelinjection nozzle 70 and the 1st mode of execution are same, and end 70a overlaps with imaginary plane Li or compares to firing chamber 20 side-prominent with imaginary plane.And Fuelinjection nozzle 70 and the 2nd mode of execution are same, form the injected fuel spray 91 of hollow.And in the 3rd mode of execution, shown in Fig. 5 (A), the central shaft Vc of Aspirating valves 40 and the central shaft Ic of Fuelinjection nozzle 70 intersect.Shown in Fig. 5 (B) (the VB-VB cross section of Fig. 5 (A)), the cross section of the valve portion 42 of Aspirating valves 40 is for roughly positive circular.On the other hand, under the situation that the central shaft Ic of the central shaft Vc of Aspirating valves 40 and Fuelinjection nozzle 70 intersects, the injected fuel spray 91 of spraying from Fuelinjection nozzle 70 forms the angle of regulation and arrives valve portion 42 with Aspirating valves 40.Therefore, when the sectional shape of the injected fuel spray of spraying from Fuelinjection nozzle 70 be positive when circular, the part of injected fuel spray may not pass through positive circular valve portion 42 outer circumferential side but attached in the valve portion 42.

Under the situation of the 3rd mode of execution, Fuelinjection nozzle 70 forms following injected fuel spray 91: the cross section vertical with central shaft Ic, be that the VC-VC cross section shown in Fig. 5 (C) is for oval.That is, Fuelinjection nozzle 70 forms the injected fuel spray 91 of the hollow of oval taper.As illustrating in the 2nd mode of execution, the shape of injected fuel spray 91 can be easily changed in the configuration of the spray orifice 71 by adjusting Fuelinjection nozzle 70.

Under the situation of the 3rd mode of execution, the sectional shape that makes the injected fuel spray 91 of spraying from Fuelinjection nozzle 70 is for oval, thus, even when the central shaft Ic of the central shaft Vc of Aspirating valves 40 and Fuelinjection nozzle 70 intersects, the injected fuel spray 91 of spraying from Fuelinjection nozzle 70 is also passed through between the wall of valve portion 42 and the cylinder head 12 of formation intakeport 16.Thus, the fuel that sprays from Fuelinjection nozzle 70 is avoided the wall of cylinder head 12 and is avoided the valve portion 42 of Aspirating valves 40 simultaneously, and flows into firing chamber 20.Therefore, from the fuel that Fuelinjection nozzle 70 sprays, the limit suppresses to the adhering to of the wall of the cylinder head 12 that forms intakeport 16, to the adhering to of the valve portion 42 of Aspirating valves 40, and the limit flows into firing chamber 20.As a result, do not hinder from the pelletizing of the fuel of Fuelinjection nozzle 70 injections, and 20 inflows are maintained vaporific fuel to the firing chamber.Thus, fuel burning fully in firing chamber 20.Therefore, can reduce the unburned HC in the waste gas, and can improve specific fuel consumption.

Fig. 6 (A)-(C) represents the 4th mode of execution of the present invention.In addition, to giving identical symbol, and omit explanation with the same structure position of the 1st mode of execution.

Under the situation of the 4th mode of execution, Fuelinjection nozzle 70 and the 1st mode of execution are same, and end 70a overlaps with imaginary plane Li or compares to firing chamber 20 side-prominent with imaginary plane.And in the 4th mode of execution, the cross section that Fuelinjection nozzle 70 forms perpendicular to central shaft Ic is the injected fuel spray 92 of roughly C font.That is, shown in Fig. 6 (B) (the VIB-VIB cross section of Fig. 6 (A)), what the injected fuel spray 92 of spraying from Fuelinjection nozzle 70 had is shaped as, the part shortcoming that the hollow elliptic cone is circumferential.As shown in Figure 7, on the jet orifice plate 72 of the spray orifice 71 that forms Fuelinjection nozzle 70, on a circumferential part, do not dispose spray orifice 71.Like this, be configured in the position of the spray orifice 71 on the jet orifice plate 72, the injected fuel spray 92 that can spray the roughly C font of hollows from Fuelinjection nozzle 70 by adjustment.

Under the situation of the 4th mode of execution, same with the 3rd mode of execution, the central shaft Vc of Aspirating valves 40 and the central shaft Ic of Fuelinjection nozzle 70 intersect.And shown in Fig. 6 (B), the cross section of the valve portion 42 of Aspirating valves 40 is for roughly positive circular.As mentioned above, under the situation that the central shaft Ic of the central shaft Vc of Aspirating valves 40 and Fuelinjection nozzle 70 intersects, the injected fuel spray 92 of spraying from Fuelinjection nozzle 70 forms the angle of regulation and arrives valve portion 42 with Aspirating valves 40.As illustrating in the 3rd mode of execution, form ellipse by the cross section that makes the injected fuel spray 92 vertical with the axle of the central shaft Ic of Fuelinjection nozzle 70, prevent that thus fuel deposition is in valve portion 42.

And in the 4th mode of execution, the sectional shape by making injected fuel spray 92 is C font roughly, and injected fuel spray 92 is avoided the axial region 41 of Aspirating valves 40 and flowed into firing chamber 20 thus.That is, the axial region 41 of Aspirating valves 40 is arranged on the elongation line of the cut part of the circumferential part of injected fuel spray 92.Thus, from the fuel that Fuelinjection nozzle 70 sprays, the limit suppresses to the adhering to of the valve portion 42 of the wall of the cylinder head 12 that forms intakeport 16 and Aspirating valves 40, to the adhering to of the axial region 41 of Aspirating valves 40, and the limit flows into firing chamber 20.As a result, do not hinder from the pelletizing of the fuel of Fuelinjection nozzle 70 injections, and 20 inflows are maintained vaporific fuel to the firing chamber.Thus, fuel burning fully in firing chamber 20.Therefore, can further reduce the unburned HC in the waste gas, and can improve specific fuel consumption.

In a plurality of mode of executions of above explanation, the example that a Fuelinjection nozzle 70 is set respectively in each intakeport 16 is illustrated.But, the Fuelinjection nozzle 70 more than 2 also can be set respectively in intakeport 16.

And, irrelevant with the formation method of the spray orifice 71 of Fuelinjection nozzle 70.For example, can as the 4th mode of execution, spray orifice 71 be formed on the jet orifice plate 72, also it can be formed on the nozzle that constitutes front end.

Below, the mounting construction and the fuel injection system of the Fuelinjection nozzle of the present invention the 5th～the 7th mode of execution described.

In the mounting construction and fuel injection system of the Fuelinjection nozzle of the 5th～the 7th mode of execution, the center of the end of the fuel ejection side of Fuelinjection nozzle is configured to, in the footpath of cylinder upwards than the central shaft of Aspirating valves central shaft side near cylinder.Here, the center of the end of the fuel ejection side of so-called Fuelinjection nozzle, be Fuelinjection nozzle axially on the end of burner oil one side, be meant the part that the central shaft with Fuelinjection nozzle intersects.By Fuelinjection nozzle being configured in than the central shaft of Aspirating valves central shaft side near cylinder, thus from Fuelinjection nozzle to central axis of air cylinder side burner oil.Therefore, even flow into the air-flow of the air-breathing formation of firing chamber to the inner circle wall side that forms cylinder via bifurcations from intakeport, the fuel that sprays to the central axis of air cylinder side also is difficult to be transported to the inner circle wall side that forms cylinder.And,,, therefore also reduce fuel adhering to the inner circle wall side that forms cylinder because fuel is sprayed by the central shaft side to cylinder even the spraying of fuel is transported to the inner circle wall side that forms cylinder.As a result, minimizing is from fuel the adhering to inner circle wall of fuel injection valves inject.Therefore, can reduce the unburned hydrocarbon of discharging, and can improve specific fuel consumption from internal-combustion engine.

And, under the situation of the central shaft almost parallel of the central shaft of Fuelinjection nozzle and Aspirating valves, can carry out the assembling of Aspirating valves and the assembling of Fuelinjection nozzle from same direction.Therefore, assembling easily and can suppress the increase in machining period and assembling man-hour.

And, under the situation that the central shaft of Fuelinjection nozzle tilts with respect to the radially inner side or the outside of the center axial cylinder of Aspirating valves, can be according to the air-breathing air-flow from the bifurcations to the firing chamber, the end of the fuel ejection side of Fuelinjection nozzle is disposed towards any direction.Thus, minimizing is from fuel the adhering to the inner circle wall that forms cylinder of fuel injection valves inject.Therefore, can reduce the unburned hydrocarbon of discharging, and can improve specific fuel consumption from internal-combustion engine.

Fig. 8 and Fig. 9 have represented to use the mounting construction of Fuelinjection nozzle of the present invention's the 5th mode of execution and the motor (internal-combustion engine) of fuel injection system.Motor 10 for example is gasoline-fueled petrol engine.In addition, fuel is not limited to gasoline, for example also can be alcohol etc.

Motor 10 has cylinder block (housing) 11 and cylinder head 12.Cylinder block 11 is formed with the cylinder 13 of tubular.Motor 10 has one or more cylinders 13.Cylinder 13 inboards contain piston 14.Piston 14 is supported and axially moving back and forth to cylinder 13 by connecting rod 15.

Cylinder head 12 is configured in a tip side of cylinder block 11.Cylinder head 12 is formed with intakeport 16 and relief opening 17.As shown in Figure 8, intakeport 16 branches into two bifurcations 161,162 in cylinder 13.As shown in Figure 9, motor 10 has the Aspirating valves 40A, the 40B that run through cylinder head 12 and open and close bifurcations 161,162 and the outlet valve 50 of switching relief opening 17.

Aspirating valves 40A, 40B run through cylinder head 12.Aspirating valves 40A, 40B have axial region 41A, 41B and the 42A of valve portion, 42B.Axial region 41A, 41B are supported on the cylinder head 12 slidably across liner 43.The axial end of axial region 41A, 41B is connected with the 42A of valve portion, 42B, and another end joins across tappet 44 and air inlet cam 45 respectively.Between the tappet 44 of cylinder head 12 and each Aspirating valves 40A, 40B, be provided with spring (elastic member) 46.Spring 46 is pushed tappet 44 to the direction of leaving from cylinder head 12.Tappet 44 moves integratedly with 40A, 40B.

Outlet valve 50 runs through cylinder head 12.Aspirating valves 50 has axial region 51 and axial region 52.Axial region 51 is supported on the cylinder head 12 movably across liner 53.An axial end of axial region 51 is connected with axial region 52, and another end joins across tappet 54 and exhaust cam 55 respectively.Between cylinder head 12 and tappet 54, be provided with spring (elastic member) 56.Spring 56 is pushed tappet 54 to the direction of leaving from cylinder head 12.Tappet 54 moves integratedly with outlet valve 50.

Being formed with the space that the end face of piston 14 sides of the end face of piston side of end face, Aspirating valves 40A, 40B of cylinder head 12 sides of face, piston 14 of cylinder block 11 sides of internal face 13a, cylinder head 12 of the cylinder block 11 of cylinder 13 and outlet valve 50 forms is firing chamber 20.Firing chamber 20 can be communicated with intakeport 16 and relief opening 17.Intakeport 16 and ends firing chamber 20 opposition sides are communicated with not shown pressure stabilizer.Pressure stabilizer and ends intakeport 16 opposition sides are communicated with not shown air-breathing introduction part.The air that imports from air-breathing introduction part for example flows into intakeport 16 via not shown air-strainer, closure and pressure stabilizer.

20 substantial middle portion is provided with ignition mechanism 60 to cylinder head 12 in the firing chamber.Ignition mechanism 60 runs through cylinder head 12 ground settings.Ignition mechanism 60 constitutes one by not shown spark coil and spark plug.The end of the spark plug side of ignition mechanism 60 is exposed in the firing chamber 20.

Under the situation of present embodiment, as shown in Figure 8, be communicated with firing chamber 20 from two bifurcations 161,162 of intakeport 16 branches.And two relief openings 17 are communicated with firing chamber 20.That is, the motor 10 of present embodiment is so-called 4 valve engines.In addition, the bifurcations 161,162 and the relief opening 17 of motor 10 also can constitute, and are communicated with the firing chamber more than 3 respectively.And, for example also can be used as the bifurcations that is communicated with firing chamber 20, making relief opening is that two what is called 5 valve engines are such, makes the number of bifurcations and relief opening different.

At the branching portion between 20 163 from the pressure stabilizer to the firing chamber, intakeport 16 is branched off into two bifurcations 161,162.Thus, flow into the air-breathing of intakeport 16, be assigned to two bifurcations 161,162 from branching portion 163 from pressure stabilizer.Bifurcations 161 and bifurcations 162 are separated by wall portion 164.

As shown in Figure 8, cylinder head 12 is provided with Fuelinjection nozzle 70A, 70B.As shown in Figure 8, in each bifurcations 161,162, be respectively arranged with each Fuelinjection nozzle 70A, a 70B.Fuelinjection nozzle 70A, 70B run through cylinder head 12.Fuelinjection nozzle 70A, 70B be, expose from bifurcations 161,162 an axial end, and another end and not shown fuel rail are joined.

Fuelinjection nozzle 70A, 70B separately with the end fuel rail opposition side be the end of the fuel ejection side of burner oil.As shown in figure 10, Fuelinjection nozzle 70A, 70B have spray orifice 71 in the end of fuel ejection side. Fuelinjection nozzle 70A, 70B spray the fuel that supplies to not shown fuel rail respectively from spray orifice 71 to flowing through bifurcations 161,162 air-breathing.

Under the situation of the 5th mode of execution, Fuelinjection nozzle 70A, 70B are the solenoid valve by intermittently moving back and forth in the axial direction to the energising of not shown coil.As shown in figure 10, Fuelinjection nozzle 70A, 70B have in inside to axially movable needle-valve 73.Needle-valve 73 is by being located in the valve seat 75 that is formed on the main body 74 or leaving from valve seat 75, intermittently sprays from the fuel of spray orifice 71 thus.Under the situation of the 5th mode of execution, as shown in figure 11, Fuelinjection nozzle 70A, 70B have the jet orifice plate 72 of formation spray orifice 71 at the front end of main body 74.

Fig. 8 is for schematically representing to observe from arrow VIII direction the figure of the state of motor 10 shown in Figure 9, for schematically representing from the explanatory drawing of the position relation of each bifurcations 161,162 of intakeport 16 branches of motor 10 and the Aspirating valves 40A, the 40B that are provided with each bifurcations 161,162 and Fuelinjection nozzle 70A, 70B.As mentioned above, two bifurcations 161,162 from intakeport 16 branches are communicated with the firing chamber 20 of motor 10.In each bifurcations 161,162, be respectively arranged with Fuelinjection nozzle 70A, 70B.Aspirating valves 40A opens and closes the end of firing chamber 20 sides of bifurcations 161.And Aspirating valves 40B opens and closes the end of firing chamber 20 sides of bifurcations 162.The central shaft Pc of cylinder 13 is by the center of firing chamber 20.

In the 5th mode of execution, the Fuelinjection nozzle 70A of bifurcations 161 is configured to, and the center C 1 of the front end of fuel ejection side makes progress in the footpath of cylinder 13 than the central shaft Pc side of the close cylinder 13 of central shaft Pv1 of Aspirating valves 40A.Equally, the Fuelinjection nozzle 70B of bifurcations 162 is configured to, and the center C 2 of the front end of fuel ejection side makes progress in the footpath of cylinder 13 than the central shaft Pc side of the close cylinder 13 of central shaft Pv2 of Aspirating valves 40B.

Here, center C 1, the C2 of the front end of the fuel ejection side of so-called Fuelinjection nozzle 70A, 70B as shown in figure 10, are meant the end and the central shaft Pi1 of Fuelinjection nozzle 70A, 70B, the position that Pi2 intersects of the fuel ejection side of Fuelinjection nozzle 70A, 70B.Under the situation of the 5th mode of execution, the front end of main body 74 is provided with jet orifice plate 72.Thus, under the situation of the 5th mode of execution, center C 1, the C2 of the front end of the fuel ejection side of Fuelinjection nozzle 70A, 70B are, jet orifice plate 72 with end faces main body 74 opposition sides, be the end face 721 of firing chamber 20 sides, the point that intersects with central shaft Pi1, the Pi2 of Fuelinjection nozzle 70A, 70B.

What flow in intakeport 16 is air-breathing, separately flow into bifurcations 161 and bifurcations 162 at branching portion 163.Thus, flow into the air-breathing of each bifurcations 161,162, form in the footpath of cylinder 13 upwards heart side direction outer circumferential side therefrom, promptly to the air-flow of the inner circle wall 13a side of the cylinder block 11 that forms cylinder 13 from intakeport 16.Thus, the injected fuel spray from Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection is transported along the inspiratory airflow shown in the arrow f.

Under the situation of the 5th mode of execution, the center C 2 of the center of the front end C1 of Fuelinjection nozzle 70A and the front end of Fuelinjection nozzle 70B is configured to respectively, than the central shaft Pv2 of the central shaft Pv1 of Aspirating valves 40A or the Aspirating valves 40B central shaft Pc side near cylinder 13.Therefore, even the injected fuel spray of spraying from Fuelinjection nozzle 70A and Fuelinjection nozzle 70B is transported along the inspiratory airflow shown in the arrow f, also near the center of bifurcations 161,162, be to flow into firing chamber 20 near the center of valve portion 42,52 of Aspirating valves 40A, 40B.Thus, even be formed with from intakeport 16 under the situation of the inspiratory airflow of bifurcations 161 and bifurcations 162, also reduce fuel adhering to the inner circle wall 13a of the cylinder block 11 that forms cylinder 13.

By reducing fuel, reduce being helpless to burnt fuel thus to the adhering to of the inner circle wall 13a of cylinder block 11.Therefore, reduce from the partial combustion of the fuel of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection.As a result, reduce to the motor 10 outside unburned fuels of discharging.Therefore, can reduce the unburned HC that discharges from motor 10.And, can not become drop ground efficient combustion from the fuel of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection.Therefore, when motor 10 was required the output of regulation, minimizing should be from the fuel quantity of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection.Therefore, can improve specific fuel consumption.

And in the 5th mode of execution, the central shaft Pi2 of the central shaft Pi1 of Fuelinjection nozzle 70A, the central shaft Pv1 of Aspirating valves 40A, Fuelinjection nozzle 70B and the central shaft Pv2 of Aspirating valves 40B are set to parallel substantially.Thus, Aspirating valves 40A, 40B and Fuelinjection nozzle 70A, 70B all can be assembled from same direction.Therefore, the assembling of Aspirating valves 40A, 40B and Fuelinjection nozzle 70A, 70B is become easily, can reduce machining period.

Figure 12 or Figure 13 represent the motor 10 of the present invention's the 6th, the 7th mode of execution respectively.

In the 6th mode of execution, as shown in figure 12, the central shaft Pi1 of Fuelinjection nozzle 70A is with respect to the central shaft Pv1 of Aspirating valves 40A, and the radially inner side of firing chamber 20 side direction cylinders 13 tilts.And the central shaft Pi2 of Fuelinjection nozzle 70B is with respect to the central shaft Pv2 of Aspirating valves 40B, and the radially inner side of firing chamber 20 side direction cylinders 13 tilts.On the other hand, the center C 2 of the center C 1 of the front end of Fuelinjection nozzle 70A and the front end of Fuelinjection nozzle 70B is positioned at the central shaft Pc side near cylinder 13 than the central shaft Pv2 of the central shaft Pv1 of Aspirating valves 40A or Aspirating valves 40B.Thus, from the fuel of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B, upwards spray to central shaft Pc side in the footpath of cylinder 13.And by flow to the inspiratory airflow of bifurcations 161 and bifurcations 162 from intakeport 16, the fuel that is sprayed is transported the inner circle wall 13a side that to the radial outside of cylinder 13, promptly forms cylinder 13.

In the 7th mode of execution, as shown in figure 13, the central shaft Pi1 of Fuelinjection nozzle 70A is with respect to the central shaft Pv1 of Aspirating valves 40A, and the radial outside of firing chamber 20 side direction cylinders 13 tilts.And the central shaft Pi2 of Fuelinjection nozzle 70B is with respect to the central shaft Pv2 of Aspirating valves 40B, and the radial outside of firing chamber 20 side direction cylinders 13 tilts.On the other hand, the center C 2 of the center C 1 of the front end of Fuelinjection nozzle 70A and the front end of Fuelinjection nozzle 70B is positioned at the central shaft Pc side near cylinder 13 than the central shaft Pv2 of the central shaft Pv1 of Aspirating valves 40A or Aspirating valves 40B.Thus, by flow to the inspiratory airflow of bifurcations 161 and bifurcations 162 from intakeport 16, the fuel from Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection is transported to the inner circle wall 13a side that forms cylinder 13.

As mentioned above, in the 6th mode of execution or the 7th mode of execution, as long as center C 1, the C2 of the front end of the fuel ejection side of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B, be in the central shaft Pc side near cylinder 13 than the central shaft Pv2 of the central shaft Pv1 of Aspirating valves 40A or Aspirating valves 40B, the central shaft Pi1 of Fuelinjection nozzle 70A or the central shaft Pi2 of Fuelinjection nozzle 70B, can be not parallel with the central shaft Pv2 of the central shaft Pv1 of Aspirating valves 40A or Aspirating valves 40B yet.Like this, in the 6th mode of execution or the 7th mode of execution, be set to by Fuelinjection nozzle 70A or Fuelinjection nozzle 70B, form the angle of stipulating with respect to Aspirating valves 40A or Aspirating valves 40B, thus can be according to the inspiratory airflow that flows in bifurcations 161 and bifurcations 162, to the position of hope burner oil.Thus, irrelevant with the inspiratory airflow of bifurcations 161 and bifurcations 162, can reduce fuel adhering to the inner circle wall 13a of the cylinder 13 that forms firing chamber 20.

In the 5th of above explanation～the 7th mode of execution, as shown in figure 11, Fuelinjection nozzle 70A, 70B that jet orifice plate 72 is set with the front end in main body 74 are that example is illustrated.

Relative therewith, in Fuelinjection nozzle, there is following Fuelinjection nozzle, promptly as shown in figure 14, have the sleeve 76 in jet orifice plate 72 outsides that the front end of main body of covering 74 is provided with.Like this, under the situation of the Fuelinjection nozzle with sleeve 76, the center C x of the front end of fuel ejection side is, the front end of sleeve 76, the point that to be faces 761 sleeve 76 and main body 74 opposition sides report to the leadship after accomplishing a task with the central shaft Pi of Fuelinjection nozzle.

And, as shown in figure 15, also have the part of jet orifice plate 72 to form to the side-prominent curved situation in firing chamber 20.In this case, the center C x of the front end of fuel ejection side is, the point that the front end 722 of outstanding jet orifice plate 72 and the central shaft Pi of Fuelinjection nozzle intersect.

As shown in figure 16, form under the situation of the side-prominent overshooting shape in firing chamber 20 in jet orifice plate 72, the center C x of the front end of fuel ejection side is, the point that the front end 723 of outstanding jet orifice plate 72 and the central shaft Pi of Fuelinjection nozzle intersect.

As shown in figure 17, under the front end of needle-valve 73 situation outstanding from the front-end face 741 of body 74, the center C x of the front end of fuel ejection side, with the location independent of needle-valve 73, the point that intersects for the central shaft Pi of the front-end face 741 of body 74 and Fuelinjection nozzle.

On the other hand, as shown in figure 18, outstanding and sleeve 76 covers the situation in its outside to the front end that needle-valve 73 also arranged from the front-end face 741 of body 74.In this case, the center C x of the front end of fuel ejection side is, the point that the front-end face 761 of sleeve 76 and the central shaft Pi of Fuelinjection nozzle intersect.

As mentioned above, irrelevant with the shape of the front end of Fuelinjection nozzle, the center C x of the front end of fuel ejection side is defined as, for example the end face of the most close firing chamber 20 sides in the parts that are fixed like that of body 74 or sleeve 76, the part of intersecting with the central shaft Pi of Fuelinjection nozzle.

Below, the fuel injection system of the present invention's the 8th mode of execution is described.

In the fuel injection system of the 8th mode of execution, except that the downstream side Fuelinjection nozzle that is provided with in each bifurcations, relying on the bifurcations opposition side than branching portion, promptly on the inspiratory airflow direction, also having the upstream side Fuelinjection nozzle at upstream side.For example under the less situation of output, at desired fuel flow rate hour, from the downstream side injects fuel.Thus, spray more a spot of fuel from the downstream side Fuelinjection nozzle to each bifurcations.Therefore, can make fuel particlesization.And, for example under the bigger situation of output, when desired fuel flow rate is big, outside the Fuelinjection nozzle of downstream side also from the upstream side injects fuel.Thus, spray by the unappeasable fuel of downstream side Fuelinjection nozzle to intakeport from the upstream side Fuelinjection nozzle.When requiring bigger fuel flow rate, the inspiratory flow that flows into intakeport and bifurcations is bigger.Therefore, from the fuel of the upstream side fuel injection valves inject that is provided with by upstream side than branching portion, even attached on the wall that forms bifurcations, the also fuel that gasifies and adhere to by inspiratory airflow.Therefore, can guarantee the fuel flow rate of needs, and can supply with and air-breathing well-mixed fuel to the firing chamber.

And, control unit to situation about controlling from the fuel injection amount of upstream side Fuelinjection nozzle and downstream side fuel injection valves inject under, can come controlling according to for example inspiratory flow or desired output from the fuel injection amount of upstream side Fuelinjection nozzle and downstream side Fuelinjection nozzle.

And, when from the fuel injection amount of downstream side Fuelinjection nozzle when not enough, make at control unit under the situation of upstream side injects fuel, for example hour at the such desired fuel flow rate of the less situation of output, from the downstream side injects fuel.Thus, spray more a spot of fuel from the downstream side Fuelinjection nozzle to each bifurcations.And, for example become bigger, desired fuel flow rate when becoming big when output, except that the Fuelinjection nozzle of downstream side also from the upstream side injects fuel.When requiring bigger fuel flow rate, the inspiratory flow that flows into intakeport and bifurcations is bigger.Therefore, from the fuel of the upstream side fuel injection valves inject that is provided with by upstream side than branching portion, even attached on the wall that forms bifurcations, the also fuel that adheres to by the inspiratory airflow gasification.Therefore, can guarantee the fuel flow rate of needs, and can supply with and air-breathing well-mixed fuel to the firing chamber.

And, set according to the inspiratory flow that detects by the flow detection unit under the situation of the fuel injection amount of upstream side Fuelinjection nozzle and downstream side Fuelinjection nozzle at control unit, when the inspiratory flow quantitative change is big, desired fuel increases, only pass through from downstream side injects fuel, fuel shortage.Therefore, when the inspiratory flow quantitative change was big, control unit also made the upstream side injects fuel except that the downstream side Fuelinjection nozzle.When requiring bigger fuel flow rate, the inspiratory flow that flows into intakeport and bifurcations is bigger.Therefore, from the fuel of the upstream side fuel injection valves inject that is provided with by upstream side than branching portion, even attached on the wall that forms bifurcations, the also fuel that can adhere to by the inspiratory airflow gasification.Therefore, can guarantee the fuel flow rate of needs, and can supply with and air-breathing well-mixed fuel to the firing chamber.

For example when the temperature of engine cooling water was hanged down, the intakeport wall surface temperature was also lower, is difficult to gasification attached to the fuel on the mouth wall.Therefore, when from the upstream side injects fuel, fuel than branching portion by downstream side easily attached to the wall that forms bifurcations on.On the other hand, when the temperature of engine cooling water was higher, the intakeport wall surface temperature was also higher, and the fuel that adheres on the mouth wall gasifies easily.Therefore, even from the upstream side injects fuel, fuel is on also being difficult to attached to the wall that forms bifurcations than branching portion by downstream side.In the temperature of control unit according to the engine cooling water that detects by temperature detecting unit, set under the situation of the fuel injection amount of upstream side Fuelinjection nozzle and downstream side Fuelinjection nozzle, can guarantee the fuel flow rate of needs, and can supply with and air-breathing well-mixed fuel to the firing chamber.

Figure 20 has represented to use the motor of the fuel injection system of the present invention's the 8th mode of execution.Engine system 1 has motor 10 and control gear 2.Motor 10 is such as shown in figure 21, for example is gasoline-fueled petrol engine.In addition, fuel also can be for example alcohol etc.And motor 10 is not limited to petrol engine, for example also can be diesel engine.

Motor 10 has cylinder block 11 and cylinder head 12.Cylinder block 11 is formed with the cylinder 13 of tubular.Motor 10 has one or more cylinders (cylinder) 13.Cylinder 13 contains piston 14 in the inboard.Piston 14 by connecting rod 15 cylinder 13 axially on move back and forth.

Cylinder head 12 is configured in a tip side of cylinder block 11.Cylinder head 12 is formed with intakeport 16 and relief opening 17.Motor 10 has Aspirating valves 40 that runs through cylinder head 12 and open and close intakeport 16 and the outlet valve 50 that opens and closes relief opening 17.

Aspirating valves 40 runs through cylinder head 12.Aspirating valves 40 has axial region 14 and valve portion 42.Axial region 41 is supported on the cylinder head 12 slidably across liner 43.An axial end of axial region 41 is connected with valve portion 42, and another end joins across tappet 44 and air inlet cam 45.Between cylinder head 12 and tappet 44, be provided with spring (elastic member) 46.Spring 46 is pushed tappet 44 to the direction of leaving from cylinder head 12.Tappet 44 moves integratedly with Aspirating valves 40.

Outlet valve 50 runs through cylinder head 12.Outlet valve 50 has axial region 51 and valve portion 52.Axial region 51 is supported on the cylinder head 12 movably across liner 53.An axial end of axial region 51 is connected with valve portion 52, and another end joins across tappet 54 and exhaust cam 55.Between cylinder head 12 and tappet 54, be provided with spring (elastic member) 56.Spring 56 is pushed tappet 54 to the direction of leaving from cylinder head 12.Tappet 54 moves integratedly with Aspirating valves 50.

Being formed with the space that the end face of piston 14 sides of the end face of piston 14 sides of end face, Aspirating valves 40 of cylinder head 12 sides of face, piston 14 of cylinder block 11 sides of internal face, cylinder head 12 of the cylinder block 11 of cylinder 13 and outlet valve 50 forms is firing chamber 20.Firing chamber 20 can be communicated with intakeport 16 and relief opening 17.As shown in figure 20, intakeport 16 be communicated with pressure stabilizer 25 with ends firing chamber 20 opposition sides.Pressure stabilizer 25 and ends intakeport 16 opposition sides are communicated with not shown air-breathing introduction part.The air that imports from air-breathing introduction part for example flows into pressure stabilizer 25 via not shown air-strainer and closure.The air distribution that pressure stabilizer 25 will import from air-breathing introduction part is to the intakeport 16 that is communicated with each cylinder 13 of motor 10.

As shown in figure 21,20 substantial middle portion is provided with ignition mechanism 60 to cylinder head 12 in the firing chamber.Ignition mechanism 60 is configured to run through cylinder head 12.Ignition mechanism 60 constitutes one by not shown spark coil and spark plug.The end of the spark plug side of ignition mechanism 60 is exposed in the firing chamber 20.

Under the situation of the 8th mode of execution, as shown in figure 19, be communicated with firing chamber 20 from two bifurcations 161,162 of intakeport 16 branches.And two relief openings 17 are communicated with firing chamber 20.That is, the motor 10 of the 8th mode of execution is so-called 4 valve engines.In addition, the bifurcations 161,162 of motor 10 and relief opening 17 also can constitute respectively and be communicated with firing chamber 20 more than 3.And for example making the bifurcations that is connected with firing chamber 20 is that 3, relief opening are that 2 what is called 5 valve engines are such, makes the number of bifurcations and relief opening different also passable.

Intakeport 16 is in that the branching portion 20 163 is branched off into two bifurcations 161,162 from pressure stabilizer 25 to the firing chamber.Thus, flow into the air-breathing of intakeport 16, be assigned to two bifurcations 161,162 from branching portion 163 from pressure stabilizer 25.Under the situation of the 8th mode of execution, the internal diameter of 2 bifurcations 161,162 is identical substantially.Bifurcations 161 and bifurcations 162 are separated by wall portion 164.

As shown in figure 21, cylinder head 12 is provided with Fuelinjection nozzle 70A, 70B, 70C.As shown in figure 19, in the way of each bifurcations 161,162, be respectively arranged with each Fuelinjection nozzle 70A, a 70B.And, in the way of intakeport 16, be provided with a Fuelinjection nozzle 70C.Thus, in intakeport 16 and bifurcations 161,162, be provided with 3 Fuelinjection nozzles altogether. Fuelinjection nozzle 70A, 70B, 70C run through cylinder head 12.Fuelinjection nozzle 70A, 70B are that an axial end is exposed in the bifurcations 161,162, and another end is connected with fuel rail 81.The axial end of Fuelinjection nozzle 70C is exposed in the intakeport 16, and another end is connected with fuel rail 82.

Fuelinjection nozzle 70A, 70B respectively with the end of fuel rail 81 opposition sides on have spray orifice 71A, 71B.Fuelinjection nozzle 70C with the end of fuel rail 82 opposition sides on have spray orifice 71C.Fuel rail 81 and fuel rail 82 for example are supported on the cylinder head 12.Never illustrated fuel tank is to fuel rail 81 and fuel rail 82 fuelings.The fuel that Fuelinjection nozzle 70A, 70B will supply to fuel rail 81 is ejected into respectively from spray orifice 71A, 71B and flows into bifurcations 161,162 air-breathing.And the fuel that Fuelinjection nozzle 70C will supply to fuel rail 82 is ejected into from spray orifice 71C and flows into intakeport 16 air-breathing.

Under the situation of the 8th mode of execution, Fuelinjection nozzle 70A and Fuelinjection nozzle 70B are separately positioned in the bifurcations 161,162, and Fuelinjection nozzle 70C is arranged in the intakeport 16.Thus, the end of the spray orifice 71C side of Fuelinjection nozzle 70C is set at than branching portion 163 by the opposition side of firing chamber 20, promptly at the upstream side of inspiratory airflow direction.Thus, Fuelinjection nozzle 70C is the upstream side Fuelinjection nozzle in the patent claim.And the spray orifice 71A of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B, the end of 71B side are set at than branching portion 163 by firing chamber 20 sides, promptly in the downstream side of inspiratory airflow direction.Thus, Fuelinjection nozzle 70A and Fuelinjection nozzle 70B are the downstream side Fuelinjection nozzle in the patent claim.

The end of the end of spray orifice 711 sides of Fuelinjection nozzle 70A and spray orifice 721 sides of Fuelinjection nozzle 70B all is arranged on than branching portion 163 by firing chamber 20 sides.And, according to the internal diameter of each bifurcations 161,162, set from the angle of attack of the fuel of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection.That is, angle of attack is set to following degree, and is promptly from the fuel of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection, non-cohesive on the inwall of the cylinder head 12 that forms bifurcations 61 and bifurcations 62.Therefore, can be from the fuel of Fuelinjection nozzle 70A and Fuelinjection nozzle 70B injection attached in the wall portion 164 of separating bifurcations 61 and bifurcations 62.

Control gear shown in Figure 20 (ECU) 2 is the microcomputer for being made of CPU, ROM and RAM for example.Control gear 2 is connected with Fuelinjection nozzle 70A, 70B and the Fuelinjection nozzle 70C of motor 10.Control gear 2 is controlled the fuel injection timing of Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C to Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C output drive signal.Control gear 2 is connected with the throttle sensor 12 that aperture to not shown closure detects.The inspiratory flow of intakeport 16 and bifurcations 161,162 is relevant with the aperture of not shown closure.Therefore, control gear 2 detects the inspiratory flow that flows into intakeport 16 and bifurcations 161,162 by detected the aperture of not shown closure by throttle sensor 12.Therefore, throttle sensor 12 is the flow detection unit in the patent claim.

Control gear 2 not only with Fuelinjection nozzle 70A, 70B, Fuelinjection nozzle 70C and throttle sensor 12, also be connected with ignition mechanism 60 and cooling-water temperature sensor 4.Control gear 2 is lighted a fire to the mixed gas of firing chamber 20 in the period of regulation to ignition mechanism 60 output drive signals.Cooling-water temperature sensor 4 detects the temperature of not shown engine cooling water.Therefore, cooling-water temperature sensor 4 is the temperature detecting unit in the patent claim.

Control gear 2 also is connected with not shown speed probe etc.The rotating speed of not shown speed probe detection of engine 10.Control gear 2 is by operating condition and load condition from detection of engine 10 such as throttle sensor 12, cooling-water temperature sensor 4, speed probes, and the fuel injection amount of setting Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C.

Below, to describing based on Fuelinjection nozzle 70A, the 70B of control gear and the action of Fuelinjection nozzle 70C.

Under the situation that control gear 2 is controlled Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C according to inspiratory flow, detect the aperture of not shown closure by throttle sensor 12.As mentioned above, the aperture of closure is relevant with the inspiratory flow of intakeport 16 and bifurcations 161,162.For example, when closure is not almost opened, during motor 10 idling, the inspiratory flow minimum of intakeport 16 and bifurcations 161,162.On the other hand, when the aperture increase of closure, when closure is standard-sized sheet, motor 10 becomes high output state, and the inspiratory flow of intakeport 16 and bifurcations 161,162 increases.Like this, control gear 2 detects the inspiratory flow of intakeport 16 and bifurcations 161,162 thus by detected the aperture of not shown closure by throttle sensor 12.

Control gear 2 is controlled the fuel injection of Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C according to the inspiratory flow that detects.At inspiratory flow hour, control gear 2 is to Fuelinjection nozzle 70A, 70B output drive signal.Thus, the Fuelinjection nozzle 70A from be arranged on two bifurcations 161,162,70B burner oil.From the fuel that Fuelinjection nozzle 70A, 70B spray, be injected into respectively and flow in bifurcations 161,162 air-breathing.

At inspiratory flow hour, also the angle is little for the inspiratory flow of bifurcations 161,162.Therefore, when when the fuel injection amount of Fuelinjection nozzle 70A, 70B increases, fuel can not fully mix with air-breathing, and the part of the fuel of injection becomes drop and on the inwall attached to the cylinder head 12 that forms bifurcations 161,162 easily.The fuel that becomes drop and adhere to keeps liquid condition ground to flow into firing chamber 20 along the inwall of cylinder head 12.The fuel of liquid condition does not mix with suction the air-breathing of firing chamber 20, so the burning in the firing chamber 20 becomes insufficient.As a result, the output, the specific fuel consumption that are helpless to motor 10 worsen, and the unburned hydrocarbon (HC) that comprises in the waste gas increases.

Under the situation of the 8th mode of execution, at inspiratory flow hour, from the Fuelinjection nozzle 70A, the 70B that bifurcations 161,162, are provided with burner oil respectively.Therefore, can reduce the fuel flow rate that sprays from Fuelinjection nozzle 70A, 70B.By reducing the fuel flow rate that sprays from Fuelinjection nozzle 70A, 70B, can make spray orifice 71A, the 71B minor diameterization of Fuelinjection nozzle 70A, 70B.The diameter of spray orifice 71A, 71B is more little to be promoted more from the pelletizing of the fuel of Fuelinjection nozzle 70A, 70B injection.Thus, by reducing the fuel flow rate that sprays from Fuelinjection nozzle 70A, 70B, and make spray orifice 71A, the 71B minor diameterization of Fuelinjection nozzle 70A, 70B, promote the pelletizing of the fuel that sprays from Fuelinjection nozzle 70A, 70B thus.As a result, the fuel from Fuelinjection nozzle 70A, 70B are ejected into bifurcations 161,162 fully mixes with inflow the air-breathing of bifurcations 161,162.Thus, even at inspiratory flow hour, also fully mixed with air-breathing by micronized fuel, so fuel fully burning in firing chamber 20.Therefore, can not cause the deterioration of specific fuel consumption, and can reduce the HC that comprises in the waste gas.

Yet at inspiratory flow hour, control gear 2 is not to Fuelinjection nozzle 70C output drive signal.Thus, Fuelinjection nozzle 70C burner oil in flowing into intakeport 16 air-breathing not.At inspiratory flow hour, the Fuelinjection nozzle 70A from be arranged on bifurcations 161,162, the desired fuel of 70B jet engine 10 runnings.Therefore, by from the abundant supply engine 10 desired fuel of the injection of Fuelinjection nozzle 70A, 70B.Therefore, though the Fuelinjection nozzle 70C burner oil not from be arranged on intakeport 16, also steady running of motor 10.

And at inspiratory flow hour, when from Fuelinjection nozzle 70C burner oil, the part of the fuel that sprays from Fuelinjection nozzle 70C may be attached in the wall portion 164 of separating bifurcations 161,162.Under the less situation of inspiratory flow, become drop and flow into firing chamber 20 via bifurcations 161,162 along wall portion 164 attached to the fuel in the wall portion 164.The fuel of droplet-like burns insufficient as mentioned above.Therefore, at inspiratory flow hour, control gear 2 stops to spray from the fuel of Fuelinjection nozzle 70C.Thus, reduce the fuel that adheres to and adhere to of fuel in wall portion 164 and flow into firing chamber 20.Therefore, do not cause the deterioration of specific fuel consumption, and can reduce the HC that comprises in the waste gas.

On the other hand, when inspiratory flow becomes big, be motor 10 when being required bigger output, control gear 2 is except Fuelinjection nozzle 70A, 70B in being arranged on bifurcations 161,162, the Fuelinjection nozzle 70C output drive signal in being arranged on intakeport 16 also.When motor 10 was required bigger output, inspiratory flow increased, and desired fuel flow rate also increases.At this moment, can be limited from the fuel flow rate that Fuelinjection nozzle 70A, 70B being arranged on bifurcations 161,162 spray.Therefore, with respect to the fuel flow rate that requires, from the fuel flow rate deficiency of Fuelinjection nozzle 70A, 70B injection.Therefore, control gear 2 is when the fuel injection amount that sprays from Fuelinjection nozzle 70A, 70B is not enough, to Fuelinjection nozzle 70C output drive signal.Thus, except that Fuelinjection nozzle 70A, 70B also from Fuelinjection nozzle 70C burner oil to flowing into intakeport 16 air-breathing.

When the output of motor 10 increased, the inspiratory flow that flows into intakeport 16 and bifurcations 161,162 increased.Therefore, though the fuel that sprays from Fuelinjection nozzle 70C attached in the wall portion 164 of separating bifurcations 161,162, the also fuel that adheres to by the inspiratory airflow gasification.As a result, the fuel of gasification easily mixes with inflow intakeport 16 and the air-breathing of bifurcations 161,162.Therefore, fuel flow rate can be guaranteed, and fuel and air-breathing mixing can be promoted.

Under the situation that control gear 2 is controlled Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C according to the temperature of engine cooling water, detect the temperature of not shown engine cooling water by cooling-water temperature sensor 4.Control gear 2 sprays according to the cooling water temperature control Fuelinjection nozzle 70A, the 70B that detect and the fuel of Fuelinjection nozzle 70C.When engine cooling water temperature was low, control gear 2 was to Fuelinjection nozzle 70A, 70B output drive signal.Thus, the Fuelinjection nozzle 70A from be arranged on 2 bifurcations 161,162,70B burner oil.The fuel that sprays from Fuelinjection nozzle 70A, 70B is injected into respectively and flows into bifurcations 161,162 air-breathing.

When engine cooling water temperature was low, the intakeport wall surface temperature was also lower, and the fuel that adheres on the mouth wall is difficult to gasification.Therefore, when the fuel injection amount that sprays from Fuelinjection nozzle 70A, 70B increased, the fuel of injection did not mix with air-breathing, and the part of burner oil becomes drop and on the inwall attached to the cylinder head 12 that forms bifurcations 161,162 easily.The fuel that becomes drop and adhere to keeps liquid condition ground to flow into firing chamber 20 along the inwall of cylinder head 12.The fuel of liquid condition does not mix with suction the air-breathing of firing chamber 20, so the burning in the firing chamber 20 becomes insufficient.As a result, the output, the specific fuel consumption that are helpless to motor 10 worsen, and the unburned HC that comprises in the waste gas increases.

Under the situation of the 8th mode of execution, when engine cooling water temperature is low, from Fuelinjection nozzle 70A, the 70B difference burner oil that bifurcations 161,162, is provided with.Therefore, can reduce the fuel flow rate that sprays from Fuelinjection nozzle 70A, 70B.By reducing the fuel flow rate that sprays from Fuelinjection nozzle 70A, 70B, can make spray orifice 71A, the 71B minor diameterization of Fuelinjection nozzle 70A, 70B.The diameter of spray orifice 71A, 71B is more little to be promoted more from the pelletizing of the fuel of Fuelinjection nozzle 70A, 70B injection.Thus, by reducing the fuel flow rate that sprays from Fuelinjection nozzle 70A, 70B, and make spray orifice 71A, the 71B minor diameterization of Fuelinjection nozzle 70A, 70B, promote the pelletizing of the fuel that sprays from Fuelinjection nozzle 70A, 70B thus.As a result, the fuel from Fuelinjection nozzle 70A, 70B are ejected into bifurcations 161,162 fully mixes with inflow the air-breathing of bifurcations 161,162.Thus, even when engine cooling water temperature is low, also fully mixed with air-breathing by micronized fuel, so fuel burning fully in firing chamber 20.Therefore, do not cause the deterioration of specific fuel consumption, and can reduce the HC that comprises in the waste gas.

Yet when engine cooling water temperature was low, control gear 2 was not to Fuelinjection nozzle 70C output drive signal.Thus, Fuelinjection nozzle 70C burner oil in flowing into intakeport 16 air-breathing not.When the temperature of the such motor 10 in motor 10 firm startup backs were hanged down, formation was also lower to the temperature of the parts of the air-breathing suction system of motor 10 supplies.And when the temperature of such motor 10 was low after motor 10 has just started, motor 10 rotating speeds and motor 10 loads were also less.Therefore, though the Fuelinjection nozzle 70C burner oil not from be arranged on intakeport 16, this also steady running of fuel of spraying of motor by Fuelinjection nozzle 70A, 70B from be arranged on bifurcations 161,162.

And, not only just started the back, when engine cooling water temperature is low at motor 10, when from Fuelinjection nozzle 70C burner oil, the part of the fuel that sprays from Fuelinjection nozzle 70C may be attached in the wall portion 164 of separating bifurcations 161,162.Under the lower situation of engine cooling water temperature, become drop and flow into firing chamber 20 via bifurcations 161,162 along wall portion 164 attached to the fuel in the wall portion 164.The fuel of droplet-like burns insufficient as mentioned above.Therefore, when engine cooling water temperature was low, control gear 2 stopped the burner oil from Fuelinjection nozzle 70C.Thus, reduce the fuel that adheres to and adhere to of fuel in wall portion 164 and flow into firing chamber 20.Therefore, do not cause the deterioration of specific fuel consumption, and can reduce the HC that comprises in the waste gas.

On the other hand, when the output change temperature big, motor 10 of motor 10 rose, the temperature of suction system also rose, and engine cooling water temperature also rises.When the output of motor 10 was risen, motor 10 desired fuel flow rates increased.Therefore, Fuelinjection nozzle 70A, 70B that control gear 2 removes in being arranged on bifurcations 161,162, also the Fuelinjection nozzle 70C output drive signal in being arranged on intakeport 16.

The fuel flow rate that can spray from Fuelinjection nozzle 70A, the 70B that is provided with bifurcations 161,162 is limited.Therefore, when the fuel flow rate of motor 10 requirements increases, only by fuel from Fuelinjection nozzle 70A, 70B injection, can fuel shortage.Therefore, higher at cooling water temperature, when the fuel injection amount that sprays with respect to the inspiratory flow that detects according to the aperture of closure, from Fuelinjection nozzle 70A, 70B was not enough, control gear 2 was to Fuelinjection nozzle 70C output drive signal.Thus, except that Fuelinjection nozzle 70A, 70B also from Fuelinjection nozzle 70C burner oil to flowing into intakeport 16 air-breathing.

Therefore when engine cooling water temperature was higher, the intakeport wall surface temperature also uprised, even the fuel that sprays from Fuelinjection nozzle 70C is attached in the wall portion 164 of separating bifurcations 161,162, the fuel that adheres to also gasifies.As a result, the fuel of gasification easily with air-breathing mixing of inflow intakeport 16 and bifurcations 161,162.Therefore, can guarantee flow fuel, and can promote fuel to mix with air-breathing.

In addition, in the above-described 8th embodiment, be illustrated respectively to control, and based on Fuelinjection nozzle 70A, the 70B of engine cooling water temperature and the control of Fuelinjection nozzle 70C based on Fuelinjection nozzle 70A, 70B and the Fuelinjection nozzle 70C of inspiratory flow.But, also can make up inspiratory flow and engine cooling water temperature and come the fuel injection from Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C is controlled.And whether decision from the inspiratory flow and the cooling water temperature of Fuelinjection nozzle 70C burner oil, for example the decisions at random such as flow fuel that can spray according to motor 10 performances, from Fuelinjection nozzle 70A, 70B and Fuelinjection nozzle 70C.

And in the above-described 8th embodiment, to when the fuel injection amount of Fuelinjection nozzle 70A, 70B from be arranged on bifurcations 161,162 is not enough, the structure of the Fuelinjection nozzle 70C burner oil from be arranged on intakeport 16 is illustrated.But, when inspiratory flow is big or cooling water temperature when higher, also Fuelinjection nozzle 70C burner oil only from intakeport 16, being provided with, and stop to spray from the fuel of the Fuelinjection nozzle 70A, the 70B that bifurcations 161,162, are provided with.That is, the sum total that is set at greater than the fuel injection amount of the Fuelinjection nozzle 70A, the 70B that are provided with in bifurcations 161,162 of the fuel injection amount of the Fuelinjection nozzle 70C that will be provided with in intakeport 16 gets final product.

As mentioned above, in the present invention's the 8th mode of execution, at inspiratory flow hour or engine cooling water temperature when low etc., air-breathing when becoming insufficient easily, from Fuelinjection nozzle 70A, the 70B injection small amount of fuel that bifurcations 161,162, is provided with respectively with mixing of fuel.Spraying from Fuelinjection nozzle 70A, 70B under the situation of small amount of fuel, spray orifice 71A, 71B are by minor diameterization, and the pelletizing of promotion fuel.Therefore, even at inspiratory flow hour or engine cooling water temperature when low, the air-breathing and fuel that flows into bifurcations 161,162 also fully mixes.Therefore, fuel is fully burning in firing chamber 20, does not cause the deterioration of specific fuel consumption, and can reduce the HC that comprises in the waste gas.

On the other hand, when inspiratory flow is big or the fuel flow rate that requires of engine cooling water temperature when higher etc., motor 10 when big, the Fuelinjection nozzle 70C burner oil from be arranged on intakeport 16.Therefore, even when the fuel shortage of Fuelinjection nozzle 70A, the 70B injection of only passing through in bifurcations 161,162, to be provided with, also supply with enough fuel to firing chamber 20.And, when inspiratory flow is big or engine cooling water temperature when higher, the intakeport wall surface temperature is also higher, from lean on the Fuelinjection nozzle 70C burner oil of upstream side than the branching portion 163 of bifurcations 161,162, even the fuel deposition of spraying in wall portion 164, the fuel that adheres to also since mouth wall surface temperature is higher gasifies.Therefore, flow into fuel and air-breathing well-mixed fuel, can realize abundant burning two aspects with fuel guaranteed of fuel flow rate to firing chamber 20.

In the present invention's the 8th mode of execution of above explanation, the example that the throttle opening according to throttle sensor 12 is detected inspiratory flow is illustrated.But, for example also can detect inspiratory flow according to the aperture of throttle.And, also can in intakeport 16 or bifurcations 161,162, flow transducer be set, detect inspiratory flow by flow transducer.

Below, the fuel injection system of the present invention the 9th～16 mode of execution is described.

In the fuel injection system of the 9th～16 mode of execution, in the intakeport more than 2 that is communicated with the firing chamber, be respectively arranged with Fuelinjection nozzle.Therefore, distinguish burner oil from Fuelinjection nozzle to each intakeport.The emitted dose control unit is controlled the fuel injection amount of each injection valve of each Fuelinjection nozzle, each intakeport burner oil of subtend.Thus, when for example closing between certain Aspirating valves is with intakeport and firing chamber, the Fuelinjection nozzle that is provided with in pent intakeport can carry out the not fuel injection control of burner oil.Like this, can carry out independent control to the fuel injection amount that is separately positioned on the Fuelinjection nozzle in each intakeport respectively, therefore can suppress fuel stays from fuel injection valves inject in intakeport, the deterioration of the specific fuel consumption of motor can be reduced, and the unburned HC that discharges from motor can be reduced.

And, the emitted dose control unit according to the inspiratory flow of each intakeport to situation about controlling from the fuel injection amount of each Fuelinjection nozzle under, for example close between intakeport and the firing chamber, do not flow in this intakeport when air-breathing, can stop the control that the fuel to this intakeport sprays at an Aspirating valves.Like this, fuel injection control can be carried out, therefore the fuel stays of fuel injection valves inject can be suppressed more effectively in intakeport according to the inspiratory flow in each intakeport.

And, control according to the lift amount of each Aspirating valves under the situation of the fuel injection amount of each Fuelinjection nozzle at the emitted dose control unit, in the lift amount of Aspirating valves hour, the inspiratory flow of the intakeport that is opened and closed by this Aspirating valves diminishes.And along with the lift quantitative change of Aspirating valves is big, the inspiratory flow of intakeport increases.On the other hand, be 0 in the lift amount of Aspirating valves, be Aspirating valves when closing intakeport, air-breathingly in this intakeport, do not flow.Like this, the lift amount of Aspirating valves is relevant with the inspiratory flow of the intakeport that is opened and closed by this Aspirating valves.Therefore, by control fuel injection amount according to the lift amount of Aspirating valves, can spray fuel corresponding to the inspiratory flow of each intakeport from Fuelinjection nozzle.As a result, can suppress fuel stays in intakeport inside.

At the load of motor hour, be inhaled into the inspiratory flow of motor, the air quantity that promptly needs diminishes.Therefore,, be communicated with a firing chamber under the situation of motor of a plurality of intakepories in the past, and carried out and close any one Aspirating valves, only open the control of other Aspirating valvess.Like this, have biasing, also form biasing during the fuel in flowing into the firing chamber flows, and promote the formation of mixed gas by the switching that makes Aspirating valves.As a result, can realize improving the combustion regime in the firing chamber, and improve specific fuel consumption and reduce discharge HC.But, under situation in the past since from a Fuelinjection nozzle to the intakeport burner oil more than 2, so injected fuel spray also flows into the air-breathing oral-lateral that Aspirating valves cuts out.Therefore, the some of the fuel that is sprayed is trapped in the intakeport of closing.When Aspirating valves was opened owing to the variation of operating condition, the fuel in the intakeport kept inflow firing chamber, liquid condition ground.As a result, the problem that fuel combustion is incomplete, unburned HC increases that has liquid condition.

Therefore, when the lift amount of Aspirating valves is that specified value is when following, stop to spray from the fuel of the Fuelinjection nozzle of this intakeport, thus when intakeport is closed by Aspirating valves or the lift amount of Aspirating valves hour, injects fuel not from this intakeport, being provided with.As a result, reduce the fuel that is trapped in intakeport inside.Therefore, can reduce unburned HC, and improve specific fuel consumption.

And, under corresponding respectively to the situation that characteristic is controlled in the plural intakeport Fuelinjection nozzle that is provided with respectively, can spray the fuel of appropriate amount to each intakeport by simple control, and can suppress the inside of fuel stays at intakeport.Therefore, can reduce the deterioration of specific fuel consumption of motor and the unburned HC that discharges from motor.

In the past, during as engine start etc., when the temperature of or motor short from the time of engine start is low, before Aspirating valves is opened intakeport just from injects fuel.Like this, before opening intakeport,, and realize the micronized promotion of the fuel sprayed and the promotion of fuel gasification, the discharge of the unburned HC when reducing engine start thus from injects fuel.On the other hand, for example under the aperture of the closure situation that the load of motor is bigger when big (WOT:Wide Open Throttle) etc., when Aspirating valves is opened intakeport from injects fuel.Thus, come the indoor air of cooling combustion owing to pass through the gasification latent heat of the fuel that sprayed, and reduce the air density in the firing chamber, so motor output raising.In this case, the time of opening intakeport owing to Aspirating valves is shorter, therefore in order to improve the fuel injection amount that torque need increase time per unit.But, when increasing the fuel injection amount of time per unit, hinder the pelletizing of institute's burner oil.Output when as a result, being difficult to realize reducing the discharge HC when starting simultaneously and improving high load.

Therefore, by fuel injection amount and the discharge time difference that makes plural Fuelinjection nozzle time per unit separately, for example just started back etc. under the situation, thus from the less injects fuel of the fuel injection amount of time per unit at motor.Just started back etc. under the situation at for example motor, before Aspirating valves is opened intakeport during from injects fuel.Therefore, before Aspirating valves is opened intakeport during time span longer.As a result, from the less Fuelinjection nozzle of the fuel injection amount of time per unit burner oil more for a long time.Thus, promote the pelletizing of fuel, and guarantee the fuel quantity of needs.On the other hand, for example under the bigger situation of engine loads such as WOT state, from the bigger injects fuel of the fuel injection amount of time per unit.For example under the bigger situation of engine load, Aspirating valves open intakeport during from injects fuel.Therefore, Aspirating valves open intakeport during, promptly the time span during the injects fuel is shorter.As a result, from burner oil in the bigger Fuelinjection nozzle of the fuel injection amount of time per unit is between than short-term.Thus, flow directly into the firing chamber, the temperature of firing chamber is reduced from the fuel of fuel injection valves inject.And,, guarantee the fuel quantity that needs by increasing the emitted dose of time per unit.Therefore, the HC that can realize engine start for example simultaneously reduces and the output during high load improves.

In the past, under the situation of motor, under the less condition of the load of motor, after having closed Aspirating valves, at least one Aspirating valves was opened and closed once more, and supplied with a spot of air sometimes to the firing chamber with 2 above Aspirating valvess.Thus, strengthen the air flows in the firing chamber, improve the burning of firing chamber, realize the raising of specific fuel consumption.But under the situation that at least one Aspirating valves is opened and closed, when from an injects fuel, fuel also flows into the Aspirating valves side of closing.Therefore, fuel stays flows into the firing chamber in the intakeport inside of the Aspirating valves side of closing when the fuel that is detained keeps liquid condition ground when Aspirating valves is opened.As a result, fuel may can not burn fully in the firing chamber, and causes the discharge of unburned HC.

Therefore, under the situation of fuel injecting times, at intakeport, especially be closed the fuel that side is detained and reduce at Aspirating valves to each control time per unit of two above Fuelinjection nozzles.Therefore, can realize the raising of specific fuel consumption and the minimizing of discharge HC.

And, in two above intakepories internal diameter difference separately, and the fuel injection angle of Fuelinjection nozzle is under the situation about being set of the internal diameter according to each intakeport, promptly, hour at the internal diameter of intakeport, be set lessly from the angle of attack of the fuel of fuel injection valves inject, when the internal diameter of intakeport is big, be set greatlyyer from the angle of attack of the fuel of fuel injection valves inject, in this case, can suppress to adhere to the wall that forms each intakeport from the fuel of fuel injection valves inject.For example, when on the wall that is forming each intakeport from the fuel deposition of fuel injection valves inject, the fuel that adheres to becomes drop and flows into the firing chamber.The fuel that becomes drop and flow into the firing chamber is helpless to burning, and keeps unburned state to discharge from motor.In the related fuel injection system in this aspect,, reduce fuel thus and adhere to the wall that forms each intakeport by set fuel injection angle according to the internal diameter of intakeport from fuel injection valves inject.Therefore, reduce the fuel inflow firing chamber of droplet-like.Therefore, can reduce the deterioration of specific fuel consumption of motor and the unburned HC that discharges from motor.And, in this fuel injection system, the fuel injection angle difference of plural Fuelinjection nozzle.And the fuel injection angle of first Fuelinjection nozzle is set according to the internal diameter of intakeport, and the fuel injection angle of second Fuelinjection nozzle is set to bigger than the fuel injection angle of first Fuelinjection nozzle.And, be controlled as under the situation of when above-mentioned Aspirating valves closes valve, spraying, from the emitted dose of first Fuelinjection nozzle than many from the emitted dose of second Fuelinjection nozzle, be controlled as under the situation of when valve left by Aspirating valves, spraying, from the emitted dose of second Fuelinjection nozzle than many from the emitted dose of first Fuelinjection nozzle.Thus, the deterioration of specific fuel consumption of motor and the unburned HC that discharges from motor can be reduced, and, output can be improved for example under the bigger situation of engine load during the injection when valve left by Aspirating valves.

And, under Fuelinjection nozzle is separately positioned on situation in the plural intakeport that is communicated with the firing chamber, from Fuelinjection nozzle respectively to each intakeport burner oil.The discharge time control unit is controlled from the fuel injection time of each Fuelinjection nozzle to each intakeport burner oil each Fuelinjection nozzle.Thus, for example stagger, can in being inhaled into firing chamber air-breathing, form the deflection of fuel concentration thus, perhaps remove this deflection from the fuel injection time of a plurality of Fuelinjection nozzles.For example, fuel by early stage injection, near ignition mechanism, form dense spraying, improve the ignitability of mixed gas, and can reduce the unburned HC of discharge, and under the long engine running condition of opening valve time, when having sprayed fuel at short notice, only air time of flowing into cylinder increases and can not form the mixed gas of even matter, but by the discharge time that staggers, and can make the ratio of air and fuel more even and can improve output.

And, under the situation of the fuel injection time of controlling Fuelinjection nozzle according to the switching time of Aspirating valves, according to the inspiratory airflow that in the firing chamber, forms along with the switching of Aspirating valves, the suitable injected fuel spray of inner formation in the firing chamber.Therefore, can improve the ignitability of mixed gas, and reduce the unburned HC that discharges.

And, Fuelinjection nozzle is made of early stage burner oil injection valve and later stage burner oil injection valve, the discharge time control unit, under the situation that will be set in from the fuel injection time of early stage burner oil injection valve before Aspirating valves promotes, the fuel that sprays from early stage burner oil injection valve, by the lifting of Aspirating valves with the air-breathing firing chamber that is inhaled into.At this moment, also not from later stage burner oil injection valve burner oil.Therefore, in inside, firing chamber, the pressure of inspiration(Pi) difference of the pressure difference of the fuel that sprays by following forms eddy current.As a result, for example near ignition mechanism, form the high spraying of fuel concentration.And, beginning after the fuel injection of early stage burner oil injection valve, the discharge time control unit begins to spray from the fuel of later stage burner oil injection valve.Therefore, guarantee that motor exports needed fuel quantity, guarantee by fuel from each fuel injection valves inject.Therefore, even especially the gettering quantity that sucks the firing chamber at the idling mode of motor etc. more also can be guaranteed stable burning with less fuel, and can realize the minimizing of the unburned HC of the raising of specific fuel consumption and discharge.

Figure 23 has represented to use the engine system of the fuel injection system of the present invention's the 9th mode of execution.Engine system 1 has the control gear (control unit) 2 of motor 10 and fuel injection system.As shown in figure 24, motor 10 for example is gasoline-fueled petrol engine.In addition, fuel also can be for example alcohol etc.

Motor 10 has cylinder block 11 and cylinder head 12.Cylinder block 11 is formed with the cylinder 13 of tubular.Motor 10 has one or more cylinders (cylinder) 13.Cylinder 13 contains piston 14 in the inboard.Piston 14 moves back and forth on axially at cylinder 13 by connecting rod 15.

Cylinder head 12 is configured in a tip side of cylinder block 11.Cylinder head 12 is formed with intakeport 16 and relief opening 17.Motor 10 has Aspirating valves 40 that runs through cylinder head 12 and open and close intakeport 16 and the outlet valve 50 that opens and closes relief opening 17.

Aspirating valves 40 runs through cylinder head 12.Aspirating valves 40 has axial region 41 and valve portion 42.Axial region 41 is supported on the cylinder head 12 slidably across liner 43.Axial region 41 axial ends are connected with valve portion 42, and another end joins across tappet 44 and air inlet cam 45.Valve portion 42 opens and closes the end of intakeport 16.Between cylinder head 12 and tappet 44, be provided with spring (elastic member) 46.Spring 46 is pushed tappet 44 to the direction of leaving from cylinder head 12.Tappet 44 moves integratedly with Aspirating valves 40.Therefore, spring 46 is pushed Aspirating valves 40 to the direction of closing intakeport 16.

Outlet valve 50 runs through cylinder head 12.Outlet valve 50 has axial region 51 and valve portion 52.Axial region 51 is supported on the cylinder head 12 slidably across liner 53.Axial region 51 axial ends are connected with valve portion 52, and another end joins across tappet 54 and exhaust cam 55.Valve portion 52 opens and closes the end of relief opening 17.Between cylinder head 12 and tappet 54, be provided with spring (elastic member) 56.Spring 56 is pushed tappet 54 to the direction of leaving from cylinder head 12.Tappet 54 moves integratedly with Aspirating valves 50.Therefore, spring 56 is pushed outlet valve 50 to the direction of closing relief opening 17.

Being formed with the space that the end face of piston 14 sides of the end face of piston 14 sides of end face, Aspirating valves 40 of cylinder head 12 sides of face, piston 14 of cylinder block 11 sides of internal face, cylinder head 12 of the cylinder block 11 of cylinder 13 and outlet valve 50 forms is firing chamber 20.Firing chamber 20 can be communicated with intakeport 16 and relief opening 17.Firing chamber 20 opened and closed with being communicated with by Aspirating valves 40 of intakeport 16.Firing chamber 20 opened and closed with being communicated with by outlet valve 50 of relief opening 17.Intakeport 16 and ends firing chamber 20 opposition sides are communicated with the air suction way 22 that intake manifold 21 forms.Intake manifold 21 and ends firing chamber 20 opposition sides are communicated with not shown air-breathing introduction part.The air suction way 22 that the air that imports from air-breathing introduction part for example forms from intake manifold 21 via not shown air-strainer, closure and pressure stabilizer supplies to intakeport 16.

Under the situation of the 9th mode of execution, shown in Figure 22 (A), in firing chamber 20, be communicated with each 2 intakepories 16 and relief opening 17 respectively.That is, the motor 10 of the 9th mode of execution is so-called 4 valve engines.In addition, the intakeport 16 of motor 10 and relief opening 17 also can constitute respectively and be communicated with firing chamber 20 more than 3.And also can for example make the intakeport 16 that is communicated with firing chamber 20 is that 3, relief opening 17 are that two so-called valve engine is such, makes intakeport 16 different with the number of relief opening 17.

As shown in figure 24,20 substantial middle portion is provided with ignition mechanism 60 to cylinder head 12 in the firing chamber.Ignition mechanism 60 runs through cylinder head 12 and is provided with.Ignition mechanism 60 constitutes one by not shown spark coil and spark plug.The end of the spark plug side of ignition mechanism 60 is exposed in the firing chamber 20.

As Figure 22 (A) and shown in Figure 24, on cylinder head 12, in the way of intakeport 16, be provided with Fuelinjection nozzle 70A, 70B.As shown in figure 24, Fuelinjection nozzle 70A, 70B run through cylinder head 12.An axial end of Fuelinjection nozzle 70A, 70B is exposed in the intakeport 16, and another end and fuel rail 80 are joined. Fuelinjection nozzle 70A, 70B respectively with the end of fuel rail 81 opposition sides on have spray orifice 71A, 71B.Fuel rail 80 for example is supported on the cylinder head 12.Never illustrated fuel tank is to fuel rail 80 fuelings.The fuel that Fuelinjection nozzle 70A, 70B will supply to fuel rail 80 is ejected into from spray orifice 71A, 71B and flows into intakeport 16 air-breathing.

Under the situation of the 9th mode of execution, shown in Figure 22 (A), the intakeport 16 that is communicated with firing chamber 20 is branched off into two intakepories 161 and intakeport 162.Fuelinjection nozzle 70A, 70B respectively are provided with 1 respectively in intakeport 161,162.That is, Fuelinjection nozzle 70A, 70B are that the end of spray orifice 71A, 71B side is configured to, than branching portion 163 close firing chambers 20 sides of 2 intakepories 161,162.As a result, can suppress the fuel deposition of spraying from Fuelinjection nozzle 61 and Fuelinjection nozzle 62 in the wall portion 164 between intakeport 161 and the intakeport 162.Under the situation of the 9th mode of execution, the fuel injection amount Q1 of the time per unit of Fuelinjection nozzle 61, and the fuel injection amount Q2 of the time per unit of Fuelinjection nozzle 62 roughly the same.

The microcomputer of control gear shown in Figure 23 (ECU) 2 for for example constituting by CPU, ROM and RAM.Control gear 2 is connected with each Fuelinjection nozzle 70A, 70B of motor 10.Control gear 2 is to each Fuelinjection nozzle 70A, 70B output drive signal, and to controlling from the fuel injection timing of each Fuelinjection nozzle 70A, 70B.Control gear 2 is connected with the lift range sensor 6 of the lift amount that detects Aspirating valves 40.As the 9th mode of execution, 20 are communicated with under the situation of 2 intakepories 161,162 a firing chamber, and lift range sensor 6 is arranged on each Aspirating valves 40 that opens and closes each intakeport 161,162.Thus, control gear 2 detects the lift amount of each Aspirating valves 40.

Control gear 2 not only is connected with the lift range sensor 6 of Fuelinjection nozzle 70A, 70B and Aspirating valves 40, also with ignition mechanism 60 and for example speed probe 5, throttle sensor 3 and cooling-water temperature sensor 4 are connected.Control gear 2 is to the ignition mechanism output drive signal, and the ignition of mixed gas of stipulating that makes firing chamber 20 period.The rotating speed of speed probe 5 detection of engine 10.Throttle sensor 3 detects the aperture of not shown closure.And, cooling-water temperature sensor 4 detection of engine cooling water temperatures.Control gear 2 is from the operating condition and the load condition of detection of engine 10 such as these speed probes 5, throttle sensor 3 and cooling-water temperature sensor 4, and setting is from the fuel injection amount of Fuelinjection nozzle 70A, 70B.

Have in engine system 1 under the situation of for example not shown valve-lift amount variset or valve timing variset etc., the lift amount of Aspirating valves 40 is according to the rotating speed or the load variations of motor 10.And the difference according to the rotating speed or the load of motor 10 does not drive certain in a plurality of Aspirating valvess 40 sometimes yet.Like this, when the lift amount of Aspirating valves 40 changed, the inspiratory flow of intakeport 161,162 changed according to the lift amount of Aspirating valves 40.Therefore, control gear 2 detects the inspiratory flow that flows into intakeport 161,162 by detecting the lift amount of Aspirating valves 40.For example, closed intakeport at 161,162 o'clock, in intakeport 161,162, do not produce inspiratory airflow at Aspirating valves 40.On the other hand, along with the lift quantitative change of Aspirating valves 40 is big, the inspiratory flow that flows into intakeport 161,162 increases.

When not producing inspiratory airflow in intakeport 161,162, Aspirating valves 40 cuts out intakeport 161,162.Therefore, when from Fuelinjection nozzle 70A, 70B burner oil, the fuel stays of being sprayed Aspirating valves 40 with firing chamber 20 opposition sides, be the inside of intakeport 161,162.And, aperture difference at for example each Aspirating valves 40, the inspiratory flow of comparing intakeport 162 with the inspiratory flow of intakeport 161 hour, when the Fuelinjection nozzle 62 from intakeport 162 sprayed fuel with Fuelinjection nozzle 61 same traffic of intakeport 161, the fuel that is sprayed was with respect to the inspiratory flow surplus of intakeport 162.A superfluous fuel part becomes drop and is trapped in intakeport 162 inside.

When because the rotating speed of motor 10 or the variation of load, and the Aspirating valves 40 of intakeport 162 is when leaving valve, and the fuel that is trapped in intakeport 162 inside keeps liquid condition ground to flow into firing chamber 20.Because the fuel particlesization of liquid condition is insufficient, therefore burning becomes insufficient.The inadequate fuel that burns is helpless to the output of motor 10.As a result, the unburned HC that discharges from motor 10 increases, and causes the specific fuel consumption of motor 10 to reduce.

Under the situation of the 9th mode of execution, control gear 2 detects the lift amount of Aspirating valves 40.And control gear 2 is set each fuel injection amount from Fuelinjection nozzle 70A, 70B according to the lift amount of the Aspirating valves 40 that detects.The inspiratory flow that lift amount at the Aspirating valves 40 that opens and closes intakeport 161,162 is less, flow into intakeport 161,162 hour, the fuel injection amount that control gear 2 reduces from Fuelinjection nozzle 70A, 70B.On the other hand, when the lift amount inspiratory flow big, that flow into intakeport 161,162 of the Aspirating valves 40 that opens and closes intakeport 161,162 is big, the fuel injection amount that control gear 2 increases from Fuelinjection nozzle 70A, 70B.And when not producing inspiratory airflow when Aspirating valves 40 does not promote, in intakeport 161,162, control gear 2 stops to spray from the fuel of Fuelinjection nozzle 70A, 70B.Like this, control gear 2 is according to the inspiratory flow of each intakeport 161,162 that is communicated with firing chamber 20, and each Fuelinjection nozzle 70A, 70B of each intakeport 161,162 burner oil of subtend control.

And control gear 2 also can constitute, when the lift amount of Aspirating valves 40 is that specified value stops to spray from the fuel of Fuelinjection nozzle 70A, 70B when following.Exist under a plurality of situations at Aspirating valves 40 as the 9th mode of execution, exist certain lift amount of Aspirating valves 40 to diminish, or situation about not promoting.Like this, less or such lift amount such as not promote be specified value when following in the lift amount of Aspirating valves 40, in less intakeport 161 of lift amount or intakeport 162, produce inspiratory airflow hardly.Like this, when in intakeport 161 or intakeport 162, producing inspiratory airflow hardly, when from Fuelinjection nozzle 61 or Fuelinjection nozzle 62 burner oils, the fuel stays of being sprayed the upstream side of Aspirating valves 40, promptly with the intakeport 161,162 of firing chamber 20 opposition sides in.Be trapped in fuel in the intakeport 161,162 easily on the axial region 41 or valve portion 42 attached to Aspirating valves 40, perhaps easily attached on the wall that forms wall portion 164 or intakeport 161,162.These fuel that adhere to become drop and are trapped in the intakeport 161,162, since the variation of the operating condition of motor 10 and Aspirating valves 40 when opening, may keep the drop state and flow into firing chamber 20.Therefore, when the lift amount of Aspirating valves 40 is specified value when following, control gear 2 stops to spray from the fuel of Fuelinjection nozzle 70A, 70B.Therefore, the fuel that can reduce droplet-like flows into firing chamber 20 from intakeport 161 and intakeport 162, and can reduce the discharge of unburned HC, can improve specific fuel consumption.

Under the situation of the 9th mode of execution, Fuelinjection nozzle 61 and Fuelinjection nozzle 62 have roughly the same fuel injection characteristic.That is, fuel injection amount Q1, the Q2 of Fuelinjection nozzle 61 and Fuelinjection nozzle 62 time per units are roughly the same.Therefore, shown in Figure 22 (B), control gear 2 according to the lift amount of Aspirating valves 40, be the inspiratory flow of intakeport 161,162, change driving time t1, the t2 of Fuelinjection nozzle 61 and Fuelinjection nozzle 62.At the driving time t1 of Fuelinjection nozzle 70A, 70B, when t2 is longer, promptly from control gear 2 when the output time of the drive signal of Fuelinjection nozzle 70A, 70B is longer, the opening valve time of Fuelinjection nozzle 70A, 70B is elongated.As a result, fuel injection amount q1, the q2 from Fuelinjection nozzle 70A, 70B increases.On the other hand, from control gear 2 to the output time of the drive signal of Fuelinjection nozzle 70A, 70B more in short-term, the opening valve time of Fuelinjection nozzle 70A, 70B shortens.As a result, fuel injection amount q1, the q2 from Fuelinjection nozzle 70A, 70B reduces.Like this, by the output time of control to the drive signal of Fuelinjection nozzle 61 and Fuelinjection nozzle 62, control is from fuel injection amount q1, the q2 of Fuelinjection nozzle 61 and Fuelinjection nozzle 62.

For example, the fuel injection amount of establishing the time per unit of Fuelinjection nozzle 61 and Fuelinjection nozzle 62 is respectively Q1, Q2.Q1=Q2 under the situation of the 9th mode of execution.And shown in Figure 22 (B), the driving time of establishing Fuelinjection nozzle 61 is t1, and the driving time of Fuelinjection nozzle 62 is t2.At this moment, the fuel injection amount q1 from Fuelinjection nozzle 61 is q1=Q1 * t1.And, be q2=Q2 * t2 from the fuel injection amount q2 of Fuelinjection nozzle 62.Because Q1=Q2, so t1＞t2 is q1＞q2.Therefore, by the driving time of change Fuelinjection nozzle 61 and Fuelinjection nozzle 62, can set from Fuelinjection nozzle 61 to the fuel injection amount q1 of intakeport 161 and from the fuel injection amount q2 of Fuelinjection nozzle 62 to intakeport 162.

As described above, in the 9th mode of execution, in each intakeport 161,162 that is connected with firing chamber 20, be respectively arranged with Fuelinjection nozzle 70A, 70B.Therefore, the fuel that sprays from Fuelinjection nozzle 70A, 70B can suppress attached in the wall portion 164 of separating intakeport 161 and intakeport 162, and flows into firing chamber 20.As a result, reduce fuel inflow firing chamber 20, and reduce the partial combustion of fuel attached to the droplet-like of wall portion 164.Therefore, the unburned HC that discharges from motor 10 can be reduced, and the specific fuel consumption of motor 10 can be improved.

And, in the 9th mode of execution, detect the inspiratory flow that flows into each intakeport 161,162 that is communicated with firing chamber 20 according to the lift amount of each Aspirating valves 40.And control gear 2 is controlled fuel injection amount q1, q2 from each Fuelinjection nozzle 70A, 70B according to the inspiratory flow that flows into each intakeport 161,162.Therefore, each Fuelinjection nozzle 70A, the 70B from burner oil to each intakeport 161,162 do not spray superfluous fuel.Thus, prevent superfluous fuel stays in intakeport 161,162, and the fuel that becomes drop does not flow into firing chamber 20 yet.As a result, reduce the partial combustion of fuel.Therefore, the unburned HC that discharges from motor 10 can be reduced, and the specific fuel consumption of motor 10 can be improved.

And in the 9th mode of execution, driving time t1, the t2 of control gear 2 by change Fuelinjection nozzle 70A, 70B controls fuel injection amount q1, the q2 from Fuelinjection nozzle 70A, 70B.Therefore, function is with simple reliable in structure and critically control the emitted dose of fuel.

Engine system to the fuel injection system of having used the present invention's the 10th mode of execution describes.In addition, give same-sign, and omit explanation the structure position identical with the 9th mode of execution.

In the 10th mode of execution, the schematic configuration of motor 10 is identical with the 9th mode of execution.In the 10th mode of execution, shown in Figure 25 (B), the fuel injection characteristic of each Fuelinjection nozzle 70A, 70B, be the fuel injection amount difference of the time per unit of each Fuelinjection nozzle 70A, 70B.Fuelinjection nozzle 70A, 70B be for example because the size of spray orifice 71A, 71B and quantity etc., the fuel injection amount difference of time per unit.Under the situation of the 10th mode of execution, the fuel injection amount of the time per unit of Fuelinjection nozzle 61 is Q3, and the fuel injection amount of the time per unit of Fuelinjection nozzle 62 is Q4.

In the 10th mode of execution, 1 firing chamber 20 is communicated with 2 intakepories 161,162.At this moment, be set with sometimes bigger main intakeport 161 of inspiratory flow and inspiratory flow less from intakeport 162.The Fuelinjection nozzle 61 that is arranged in the main intakeport 161 is that the fuel injection amount Q3 of time per unit is set greatlyyer.On the other hand, the Fuelinjection nozzle 62 that is arranged on from intakeport 162 is that the fuel injection amount Q4 of time per unit is set lessly.That is Q3＞Q4.

Shown in Figure 25 (B), control gear 2 with the driving of Fuelinjection nozzle 61 during during the driving of t3 and Fuelinjection nozzle 62 t4 be set at roughly the same.Thus, the fuel injection amount q3 from Fuelinjection nozzle 61 is q3=Q3 * t3.And, be q4=Q4 * t4 from the fuel injection amount q4 of Fuelinjection nozzle 62.At this moment, because Q3＞Q4, so even t3=t4 still is q3＞q4.Therefore, fuel injection amount q3, the q4 from each Fuelinjection nozzle 70A, 70B is set according to the inspiratory flow that flows through intakeport 161,162.Therefore, the unburned HC that discharges from motor 10 can be reduced, and the specific fuel consumption of motor 10 can be improved.

And, in the 10th mode of execution, control gear 2 by t3 during will driving with drive during t4 be set at identical and, control fuel injection amount q3, q4 thus from each Fuelinjection nozzle 70A, 70B by the different Fuelinjection nozzle 70A of fuel injection characteristic, 70B burner oil.Therefore, can and critically control fuel injection amount with simple reliable in structure.

In addition, also can constitute, by the 9th mode of execution and the 10th mode of execution are made up, promptly some change the among t3, the t4 to fuel injection amount Q3, the Q4 of the time per unit of fuel injection characteristic different Fuelinjection nozzle 70A, 70B and during driving controlled fuel injection amount q3, q4.

Engine system to the fuel injection system of having used the present invention's the 11st mode of execution describes.In addition, give same-sign, and omit explanation the structure position identical with the 9th mode of execution.

In the 11st mode of execution, as shown in figure 26, the internal diameter of 2 intakepories 161,162 that are communicated with 1 firing chamber 20 is different.That is, the inside diameter D 1 of intakeport 161 is bigger than the inside diameter D 2 of intakeport 162.At this moment, when the angle of attack θ 1 of the fuel that sprays from Fuelinjection nozzle 61 and Fuelinjection nozzle 62, θ 2 are identical, the injected fuel spray that Fuelinjection nozzle 62 from be arranged on the less intakeport of internal diameter 162 sprays may be attached on the wall 165 that forms intakeport 162.When the injected fuel spray of spraying from Fuelinjection nozzle 62 attached to the wall 165 that forms intakeport 162 on the time, the fuel that adheres to becomes drop and flows into firing chambers 20 along wall 165.As a result, the fuel combustion in the firing chamber 20 may be not exclusively.

Therefore, in the 11st mode of execution, set the angle of attack θ 1 of Fuelinjection nozzle 61 and the angle of attack θ 2 of Fuelinjection nozzle 62 according to the internal diameter of intakeport 161,162.Thus, the Fuelinjection nozzle 61 from be arranged on the bigger intakeport of internal diameter 161 forms the spraying of the bigger θ 1 of angle of attack, and the Fuelinjection nozzle 62 from be arranged on the less intakeport of internal diameter 162 forms the spraying of the less θ 2 of angle of attack.As a result, can suppress the fuel deposition of spraying from Fuelinjection nozzle 61 and Fuelinjection nozzle 62 on the wall that forms intakeport 161 and intakeport 162.Therefore, the unburned HC that discharges from motor 10 can be reduced, and the specific fuel consumption of motor 10 can be improved.

Engine system to the fuel injection system of having used the present invention's the 12nd mode of execution describes.In addition, the structure of the fuel injection system of the 12nd mode of execution itself is identical with above-mentioned the 9th mode of execution to the 11 mode of executions, therefore omits explanation, and fuel injection control is described.

In the 12nd mode of execution, the fuel injection amount of Fuelinjection nozzle 70A, 70B time per unit separately and discharge time difference.Fuelinjection nozzle 61 is set to, and the fuel injection amount of comparing time per unit with Fuelinjection nozzle 62 is bigger.Thus, for example just started under the situation of back etc. at motor 10, control gear 2 makes the less Fuelinjection nozzle of the fuel injection amount of time per unit 62 burner oils.After motor 10 just starts under the situation of grade, from Aspirating valves 40 once closing intakeport 161,162 during open once more, from Fuelinjection nozzle 62 burner oils.Therefore, it is longer during open to close intakeport 161,162 from Aspirating valves 40.As a result, from the less Fuelinjection nozzle 62 of the fuel injection amount of time per unit burner oil for a long time.Thus, promote the pelletizing of fuel, guarantee required fuel quantity simultaneously.

On the other hand, for example under the bigger situation of motors such as WOT state 10 loads, control gear 2 makes the bigger Fuelinjection nozzle of the fuel injection amount of time per unit 61 burner oils.For example under the bigger situation of motor 10 load, Aspirating valves 40 open intakeport 161,162 during from Fuelinjection nozzle 61 burner oils.Therefore, Aspirating valves 40 open intakeport 161,162 during, promptly shorter from the discharge time of Fuelinjection nozzle 61 burner oils.As a result, from bigger 61 short periods of the Fuelinjection nozzle ground burner oil of the fuel injection amount of time per unit.Thus, the fuel that sprays from Fuelinjection nozzle 61 flows directly into Fuelinjection nozzle 61, and the temperature of firing chamber 20 is reduced.And, bigger by the emitted dose that makes time per unit, guarantee required fuel quantity thus.

In aforesaid the 12nd mode of execution, Fuelinjection nozzle 61 is different with the fuel injection amount of the time per unit of Fuelinjection nozzle 62.Control gear 2 is by the fuel injection time of control from Fuelinjection nozzle 61 and Fuelinjection nozzle 62, thus as after the motor of motor 10 has just started, when temperature short from the time that motor 10 starts, motor 10 is hanged down, perhaps when motor 10 idling modes, from the less Fuelinjection nozzle 62 of the fuel injection amount of time per unit burner oil for a long time.On the other hand, for example when the load of motors 10 such as WOT state was big, control gear 2 made the bigger Fuelinjection nozzle of the fuel injection amount of time per unit 61 burner oil in short time.Therefore, the reduction of the engine start HC in the time of can realizing low-load as idling mode etc. simultaneously and the output when improving high load.

Engine system to the fuel injection system of having used the present invention's the 13rd mode of execution describes.In addition, the structure of the fuel injection system of the 13rd mode of execution itself is identical with above-mentioned the 9th mode of execution to the 11 mode of executions, therefore omits explanation, and fuel injection control is described.

In the 13rd mode of execution, to the fuel injecting times of each Fuelinjection nozzle 70A, 70B control time per unit.As the 13rd mode of execution, under the situation of motor 10, under the less condition of the load of motor 10, after closing Aspirating valves 40, open and close at least one Aspirating valves 40 once again sometimes with a plurality of Aspirating valvess 40, supply with little air to firing chamber 20.Thus, strengthen the air flows in the firing chamber 20, improve the burning of firing chamber 20, realize the raising of specific fuel consumption.But when opening and closing at least one Aspirating valves 40, when from 1 injects fuel, fuel also flow into Aspirating valves 40 sides of closing.Therefore, fuel stays is in intakeport 161,162 inside of Aspirating valves 40 sides of closing, and the fuel that is detained when Aspirating valves 40 is opened flows directly into the firing chamber with keeping liquid condition.

Therefore, in the 13rd mode of execution, to the fuel injecting times of each Fuelinjection nozzle 70A, 70B control time per unit.For example open and close Aspirating valves 40 and up to some till opening and closing once more during in, from the number of times difference of Fuelinjection nozzle 61 or Fuelinjection nozzle 62 burner oils.Therefore, when Aspirating valves 40 some opens and closes once more, burner oil in the intakeport 161 of keeping closed condition or intakeport 162 not.As a result, reduce at Aspirating valves 40 and be closed the fuel that is detained in the intakeport 161 of side or the intakeport 162.Thus, can reduce aqueous fuel and flow into firing chamber 20.Therefore, can realize the raising of specific fuel consumption and the reduction of discharging HC.

Engine system to the fuel injection system of having used the present invention's the 14th mode of execution describes.In addition, give same-sign, and omit explanation the structure position identical with the 9th mode of execution.

In above-mentioned the 9th mode of execution to the 11 mode of executions, following example has been described: Fuelinjection nozzle 61 is configured in the intakeport 161, Fuelinjection nozzle 62 is configured in the intakeport 162, and the branching portion 163 that each Fuelinjection nozzle 70A, 70B are configured in than 2 intakepories 161,162 leans on firing chamber 20 sides.But as shown in figure 27,2 Fuelinjection nozzle 70A, 70B also can be configured in than the opposition side of branching portion 163 by firing chamber 20.Promptly, as having illustrated in the 9th mode of execution to the 11 mode of executions, Fuelinjection nozzle 70A, 70B also can be than Aspirating valves 40 configuration of branching portion 163 near firing chamber 20 sides, also can be configured in from than branching portion 163 by the Aspirating valves 40 of firing chamber 20 opposition sides away from the position on.

In the 14th mode of execution, flow through the air-breathing of intakeport 16 and separately flow to intakeport 161 and intakeport 162 at branching portion 163.Therefore, from intakeport 16 to the intakeport 161 of branch and intakeport 162 flow into air-breathing, in cylinder 13 footpaths upwards therefrom heart side direction outer circumferential side, promptly inner circle wall 231 sides to the cylinder block 11 that forms cylinder 13 form air-flow.Therefore, from the injected fuel spray that Fuelinjection nozzle 61 and Fuelinjection nozzle 62 eject, the inspiratory airflow of being represented along arrow f transports.

Under the situation of the 14th mode of execution, Fuelinjection nozzle 61 and Fuelinjection nozzle 62 are configured in the central shaft side of leaning on cylinder 13 than the central shaft of Aspirating valves 40 respectively.Therefore, though the injected fuel spray of spraying from Fuelinjection nozzle 61 and Fuelinjection nozzle 62 transported by the inspiratory airflow that arrow f represents, also near the center of intakeport 161 and intakeport 162, be to flow into to firing chamber 20 near the center of valve portion 42 of Aspirating valves 40.Thus, even be formed with under the situation of inspiratory airflow to intakeport 161 and intakeport 162, also can reduce fuel adhering to the inner circle wall 231 of the cylinder block 11 that forms cylinder 13 from intakeport 16.

Be trapped in the firing chamber 20 attached to the fuel on the inner circle wall 231 of cylinder block 11 with keeping liquid condition, and be helpless to burning, and cause the deterioration of imperfect combustion and specific fuel consumption.On the other hand, under the situation of the 14th mode of execution,, also can reduce fuel adhering on the inner circle wall 231 of cylinder block 11, and reduce and be helpless to burnt fuel even Fuelinjection nozzle 61 and Fuelinjection nozzle 62 are configured on the position away from Aspirating valves 40.Therefore, reduce from the partial combustion of the fuel of Fuelinjection nozzle 61 and Fuelinjection nozzle 62 injections.As a result, reduce to the motor 10 outside unburned fuels of discharging.Therefore, can reduce the unburned HC that discharges from motor 10.And, do not become drop and active combustion from the fuel of Fuelinjection nozzle 61 and Fuelinjection nozzle 62 injections.Therefore, when motor 10 was required the output of regulation, the fuel quantity that should spray from Fuelinjection nozzle 61 and Fuelinjection nozzle 62 reduced.Therefore, can improve specific fuel consumption.

Engine system to the fuel injection system of having used the present invention's the 15th mode of execution describes.In addition, the fuel injection system of the 15th mode of execution is, the fuel injection angle difference of Fuelinjection nozzle 70A, 70B more than 2, the fuel injection angle of first Fuelinjection nozzle 61 is to set according to the internal diameter of intakeport 161, and the fuel injection angle of second Fuelinjection nozzle 62 is set to the angle bigger than the fuel injection angle of first Fuelinjection nozzle 61.This is identical with above-mentioned the 9th mode of execution to the 11 mode of executions beyond constituting, and therefore omits explanation, and fuel injection control is described.

In the 15th mode of execution, under the situation of when Aspirating valves 40 closes valve, spraying, the control emitted dose, so that from the emitted dose of first Fuelinjection nozzle 61 than many from the emitted dose of second Fuelinjection nozzle 62, under the situation of when valve left by Aspirating valves 40, spraying, the control emitted dose so that from the emitted dose of second Fuelinjection nozzle 62 than many from the emitted dose of first Fuelinjection nozzle 61.

In motor with 2 Aspirating valvess 40, when starting, and the less condition of engine load under, burner oil when Aspirating valves 40 closes valve.At this moment, mainly spray from first Fuelinjection nozzle 61 with angle of attack of setting according to the mouth internal diameter, can reduce fuel adhering to thus to the wall that forms intakeport, the fuel that reduces droplet-like flows into the firing chamber, and reduces the deterioration of motor fuel consumption rate and the unburned HC that discharges from motor.And, under the bigger condition of engine load, burner oil when valve left by Aspirating valves 40.At this moment, produce inspiratory airflow in intakeport, burner oil flows in cylinder with this air-flow, even therefore to spray according to the angle of attack more than the angle of attack of mouth internal diameter, also reduces the situation of fuel deposition to the intakeport wall.If can make angle of attack be big angle more, then reduce spraying each other interference and promote pelletizing, so can access better air-breathing cooling effect, and can increase and suck air quantity, improve output.Therefore, if when when valve left by Aspirating valves 40, spraying, mainly be set to more from comparing with first Fuelinjection nozzle 61, having that second Fuelinjection nozzle 62 of the angle of attack at big angle sprays with angle of attack of setting according to the mouth internal diameter, then can reduce the specific fuel consumption deterioration of motor and the unburned HC that discharges from motor, can improve output simultaneously.

Engine system to the fuel injection system of having used the present invention's the 16th mode of execution describes.The engine system of the 16th mode of execution is, the fuel injection timing of the engine system that illustrated in above-mentioned the 14th mode of execution is controlled.

Identical with the 9th mode of execution, the engine system 1 of the 16th mode of execution shown in Figure 28 has control gear 2.Control gear 2 is to each Fuelinjection nozzle 61,62 output drive signal, and control is from the fuel injection timing of each Fuelinjection nozzle 70A, 70B.Control gear 2 is connected with lift range sensor 6, ignition mechanism 60, speed probe 5, throttle sensor 3 and cooling-water temperature sensor 4 etc.Control gear 2 constitutes the injection timing control unit of patent claim.

In the 16th mode of execution, Fuelinjection nozzle 61 constitutes early stage burner oil injection valve, and Fuelinjection nozzle 62 constitutes later stage burner oil injection valve.Control gear 2 will be set in as the injection timing of the Fuelinjection nozzle 61 of early stage burner oil injection valve before Aspirating valves 40 promotes.That is, before Aspirating valves 40 promotes from Fuelinjection nozzle 61 burner oils.Thus, the fuel that sprays from Fuelinjection nozzle 61 by the lifting of Aspirating valves 40 with the air-breathing firing chamber 20 that is inhaled into.On the other hand, control gear 2 is set in the injection timing of Fuelinjection nozzle 62 and has begun after the fuel of Fuelinjection nozzle 61 sprays.That is, beginning after the fuel of Fuelinjection nozzle 61 sprays, beginning to spray from the fuel of Fuelinjection nozzle 62.

As shown in figure 28, having begun when the fuel of Fuelinjection nozzle 61 sprays, also not from Fuelinjection nozzle 62 burner oils.And at this moment, Aspirating valves 40 cuts out between intakeport 161,162 and the firing chamber 20.Therefore, produce mixed gas in the inside of intakeport 161 by the fuel that sprays from Fuelinjection nozzle 61.Then, when the fuel from Fuelinjection nozzle 61 sprays end, Aspirating valves 40 open intakepories 161.Thus, at the intakeport 161 inner mixed gass that produce, when opening, Aspirating valves 40 flows into firing chamber 20.Meanwhile, control gear 2 begins to spray from the fuel of Fuelinjection nozzle 62.

Because the inside of intakeport 161 is by from Fuelinjection nozzle 61 burner oils, so specific pressure is higher mutually with the inside of intakeport 162.Therefore, when the Aspirating valves 40 of intakeport 161 and intakeport 162 was opened, the mixed gas of intakeport 161 sides that pressure is higher formed stronger air-flow in firing chamber 20.Thus, 20 inside forms eddy current based on pressure in the firing chamber.As a result, for example near ignition mechanism 60, form the higher spraying of fuel concentration that flows into firing chamber 20 from intakeport 161.

As mentioned above, beginning after the fuel injection of Fuelinjection nozzle 61, control gear 2 begins to spray from the fuel of Fuelinjection nozzle 62.Therefore, guarantee the required fuel quantity of output of motor 10, guarantee by the fuel that sprays from Fuelinjection nozzle 70A, 70B.As a result, for example when motor 10 idling modes, around ignition mechanism 60, form denseer mixed gas with less fuel quantity.Therefore, though be inhaled into firing chamber 20 mixed gas amount more after a little while, also can guarantee to guarantee stable burning, and can improve specific fuel consumption, and can realize reducing the unburned HC of discharge with less fuel.

In the 16th mode of execution, as shown in figure 28,, begin to be illustrated for example from the fuel injection of Fuelinjection nozzle 62 with at fuel AEI After End of Injection from Fuelinjection nozzle 61.But, also can constitute the fuel injection beginning from Fuelinjection nozzle 61 finishes to injection as shown in figure 19, begin to spray from the fuel of Fuelinjection nozzle 62.

In the present invention the 9th～the 16th mode of execution of above explanation, the example that the lift amount according to Aspirating valves 40 is detected the inspiratory flow of intakeport 161,62 is illustrated.But, also can constitute, in intakeport 161,162, inspiratory flow sensor is set respectively, and detects the inspiratory flow that flows to intakeport 161,162, and control is from the fuel injection amount of Fuelinjection nozzle 70A, 70B.

And, in the 9th of above explanation～the 16th mode of execution, the example of independent each mode of execution of use is illustrated, but also can be used in combination a plurality of mode of executions.In the configuration mode of Fuelinjection nozzle 70A, the 70B that for example in the 14th mode of execution, illustrates, also can make up the control of the fuel injection amount of the 9th mode of execution to the 13 mode of executions and the 15th mode of execution.And, for example also can be on the contrary, in the configuration mode of Fuelinjection nozzle 70A, the 70B of the 9th～the 13rd mode of execution, the control of making up the fuel injection timing of the 16th mode of execution.

Its typical case has only been represented in above explanation of the present invention.Therefore, the variation that does not break away from purport of the present invention all is contained in the scope of the present invention.This variation does not break away from spirit of the present invention and scope.

Claims (42)

1, a kind of mounting construction of Fuelinjection nozzle is used for internal-combustion engine, and this internal-combustion engine has: the firing chamber is formed at the piston end face side that moves back and forth vertically in cylinder; Intakeport flows through and is inhaled into the air-breathing of above-mentioned firing chamber; And Aspirating valves, open and close between above-mentioned intakeport and the above-mentioned firing chamber; This Fuelinjection nozzle in above-mentioned intakeport, flow air-breathing in burner oil, in the mounting construction of this Fuelinjection nozzle,

The end of the above-mentioned combustion chamber side of above-mentioned Fuelinjection nozzle is positioned at the position that overlaps with imaginary plane, and is perhaps outstanding to above-mentioned combustion chamber side than above-mentioned imaginary plane; This imaginary plane by in the wall that forms above-mentioned intakeport, the outstanding wall of above-mentioned Aspirating valves, and with the orthogonality of center shaft of above-mentioned cylinder.

2, the mounting construction of Fuelinjection nozzle as claimed in claim 1, wherein,

The end of the above-mentioned combustion chamber side of above-mentioned Fuelinjection nozzle has the spray orifice that sprays above-mentioned fuel.

3, the mounting construction of Fuelinjection nozzle as claimed in claim 2, wherein,

Above-mentioned spray orifice is configured to, and the injected fuel spray of the being sprayed sectional shape vertical with the central shaft of above-mentioned Fuelinjection nozzle is tubular.

4, as the mounting construction of claim 2 or 3 described Fuelinjection nozzles, wherein,

Above-mentioned Aspirating valves has: the valve portion that cross section on the end of above-mentioned combustion chamber side, square with the axis is a circular; With the axial region that moves with above-mentioned valve portion one,

The central shaft of above-mentioned Fuelinjection nozzle intersects with the central shaft of above-mentioned Aspirating valves,

Above-mentioned spray orifice is configured to, and the injected fuel spray of the being sprayed cross section vertical with the central shaft of above-mentioned Fuelinjection nozzle is ellipse.

5, as the mounting construction of claim 2 or 3 described Fuelinjection nozzles, wherein,

Above-mentioned Aspirating valves has: the valve portion that cross section on the end of above-mentioned combustion chamber side, square with the axis is a circular; With the axial region that moves with above-mentioned valve portion one,

The central shaft of above-mentioned Fuelinjection nozzle intersects with the central shaft of above-mentioned Aspirating valves,

Above-mentioned spray orifice is configured to, and the injected fuel spray of the being sprayed cross section vertical with the central shaft of above-mentioned Fuelinjection nozzle is the roughly C font of avoiding above-mentioned axial region.

6, as the mounting construction of any described Fuelinjection nozzle in the claim 1 to 5, wherein,

Above-mentioned internal-combustion engine has the intakeport more than 2 that is communicated with a cylinder,

Above-mentioned Fuelinjection nozzle is separately positioned in the above-mentioned intakeport more than 2.

7, the mounting construction of Fuelinjection nozzle as claimed in claim 6, wherein,

Above-mentioned Fuelinjection nozzle is respectively arranged with a plurality of in the above-mentioned intakeport more than 2.

8, a kind of fuel injection system has:

Cylinder block forms cylinder;

Piston can reciprocatingly be supported in the above-mentioned cylinder;

Cylinder head is equipped on above-mentioned cylinder block, and above-mentioned cylinder block and above-mentioned piston between form the firing chamber, and have the intakeport that can be communicated with above-mentioned firing chamber;

Aspirating valves connects above-mentioned cylinder head, opens and closes the end of the above-mentioned combustion chamber side of above-mentioned intakeport; And

Fuelinjection nozzle is arranged on the above-mentioned cylinder head, burner oil in flowing through above-mentioned intakeport air-breathing;

In this fuel injection system,

The end of the above-mentioned combustion chamber side of above-mentioned Fuelinjection nozzle is positioned at the position that overlaps with imaginary plane, and is perhaps outstanding to above-mentioned combustion chamber side than above-mentioned imaginary plane; In the wall of the above-mentioned cylinder head of this imaginary plane by forming above-mentioned intakeport, the outstanding wall of above-mentioned Aspirating valves, and with the orthogonality of center shaft of above-mentioned cylinder.

9, fuel injection system as claimed in claim 8, wherein,

The end of the above-mentioned combustion chamber side of above-mentioned Fuelinjection nozzle has the spray orifice that sprays above-mentioned fuel.

10, fuel injection system as claimed in claim 9, wherein,

Above-mentioned spray orifice is configured to, and the injected fuel spray of the being sprayed sectional shape vertical with the central shaft of above-mentioned Fuelinjection nozzle is tubular.

11, as claim 9 or 10 described fuel injection systems, wherein,

Above-mentioned Aspirating valves has: valve portion, square with the axis cross section is circular, by leaving from the end of the above-mentioned combustion chamber side of the above-mentioned cylinder head that forms above-mentioned intakeport or in place to above-mentioned end, close thus or open above-mentioned intakeport and above-mentioned firing chamber between; And axial region, connect above-mentioned cylinder head, be supported on slidably on the above-mentioned cylinder head, and move with above-mentioned valve portion,

The central shaft of above-mentioned combustion injection valve intersects with the central shaft of above-mentioned Aspirating valves,

Above-mentioned Fuelinjection nozzle has a plurality of above-mentioned spray orifices, and these a plurality of above-mentioned spray orifices are configured to, and the injected fuel spray of the being sprayed cross section vertical with the central shaft of above-mentioned Fuelinjection nozzle is ellipse.

12, as claim 9 or 10 described fuel injection systems, wherein,

Above-mentioned Aspirating valves has: valve portion, square with the axis cross section is circular, by leaving from the end of the above-mentioned combustion chamber side of the above-mentioned cylinder head that forms above-mentioned intakeport or in place to above-mentioned end, close thus or open above-mentioned intakeport and above-mentioned firing chamber between; And axial region, connect above-mentioned cylinder head, be supported on slidably on the above-mentioned cylinder head, and move with above-mentioned valve portion,

Above-mentioned Fuelinjection nozzle has a plurality of above-mentioned spray orifices, and these a plurality of above-mentioned spray orifices are configured to, and the injected fuel spray of the being sprayed sectional shape vertical with the central shaft of above-mentioned Fuelinjection nozzle is the roughly C font of avoiding above-mentioned axial region.

13, as any described fuel injection system in the claim 8 to 12, wherein,

Above-mentioned cylinder head has the intakeport more than 2,

Above-mentioned Fuelinjection nozzle is separately positioned in the above-mentioned intakeport more than 2.

14, fuel injection system as claimed in claim 13, wherein,

Above-mentioned Fuelinjection nozzle is respectively arranged with a plurality of in the above-mentioned intakeport more than 2.

15, a kind of mounting construction of Fuelinjection nozzle is used for internal-combustion engine, and this internal-combustion engine has: the firing chamber is formed at the piston end face side that moves back and forth vertically in cylinder; Intakeport flows through and is inhaled into the air-breathing of above-mentioned firing chamber, and the end of above-mentioned combustion chamber side branches into a plurality of bifurcations; And Aspirating valves, the end of the above-mentioned combustion chamber side of above-mentioned each bifurcations of switching; This Fuelinjection nozzle is separately positioned in the above-mentioned bifurcations, and co-current flow is crossed the air-breathing middle burner oil of each bifurcations, in the mounting construction of this Fuelinjection nozzle,

The center of the end of the combustion jet side of above-mentioned Fuelinjection nozzle upwards is configured in the central shaft side of leaning on above-mentioned cylinder than the central shaft of above-mentioned Aspirating valves in the footpath of above-mentioned cylinder.

16, the mounting construction of Fuelinjection nozzle as claimed in claim 15, wherein,

The central shaft almost parallel of the central shaft of above-mentioned Fuelinjection nozzle and above-mentioned Aspirating valves.

17, the mounting construction of Fuelinjection nozzle as claimed in claim 15, wherein,

The above-mentioned combustion chamber side of the central shaft of above-mentioned Fuelinjection nozzle, tilt with respect to the central shaft of above-mentioned Aspirating valves radially inner side to above-mentioned cylinder.

18, the mounting construction of Fuelinjection nozzle as claimed in claim 15, wherein,

The above-mentioned combustion chamber side of the central shaft of above-mentioned Fuelinjection nozzle, tilt with respect to the central shaft of above-mentioned Aspirating valves radial outside to above-mentioned cylinder.

19, a kind of fuel injection system for internal combustion engines has:

The piston that moves back and forth;

Housing has the cylinder that can reciprocatingly support above-mentioned piston, forms the firing chamber in above-mentioned piston end face side;

Intakeport flows through and is inhaled into the air-breathing of above-mentioned firing chamber, and the end of above-mentioned combustion chamber side branches into a plurality of bifurcations;

Aspirating valves is arranged at each above-mentioned bifurcations, opens and closes the end of the above-mentioned combustion chamber side of above-mentioned bifurcations; And

Fuelinjection nozzle is arranged at each above-mentioned bifurcations, and the center of the end of fuel ejection side upwards is configured in the central shaft side of leaning on above-mentioned cylinder than the central shaft of above-mentioned Aspirating valves in the footpath of above-mentioned cylinder, and co-current flow is crossed the air-breathing middle burner oil of above-mentioned bifurcations.

20, the mounting construction of Fuelinjection nozzle as claimed in claim 19, wherein,

The central shaft almost parallel of the central shaft of above-mentioned Fuelinjection nozzle and above-mentioned Aspirating valves.

21, the mounting construction of Fuelinjection nozzle as claimed in claim 19, wherein,

The above-mentioned combustion chamber side of the central shaft of above-mentioned Fuelinjection nozzle, tilt with respect to the central shaft of above-mentioned Aspirating valves radially inner side to above-mentioned cylinder.

22, the mounting construction of Fuelinjection nozzle as claimed in claim 19, wherein,

The above-mentioned combustion chamber side of the central shaft of above-mentioned Fuelinjection nozzle, tilt with respect to the central shaft of above-mentioned Aspirating valves radial outside to above-mentioned cylinder.

23, a kind of fuel injection system for internal combustion engines has:

Intakeport, flow through to each cylinder distribute air-breathing;

Bifurcations is more than 2 from the branching portion branch that is arranged at combustion chamber side of above-mentioned intakeport;

The upstream side Fuelinjection nozzle is arranged on than the above-mentioned branching portion of the above-mentioned intakeport opposition side by above-mentioned bifurcations, can be in flowing through above-mentioned intakeport air-breathing burner oil; And

The downstream side Fuelinjection nozzle is separately positioned in the above-mentioned bifurcations, can be in flowing through above-mentioned bifurcations air-breathing burner oil.

24, fuel injection system as claimed in claim 23, wherein,

Have control unit, this control unit is to controlling from the fuel injection amount of above-mentioned upstream side Fuelinjection nozzle and above-mentioned downstream side fuel injection valves inject.

25, fuel injection system as claimed in claim 24, wherein,

Above-mentioned control unit is, when from above-mentioned downstream side injects fuel and from the fuel flow rate of above-mentioned downstream side fuel injection valves inject when not enough, from above-mentioned upstream side injects fuel.

26, as claim 24 or 25 described fuel injection systems, wherein,

Above-mentioned control unit has the flow detection unit that the inspiratory flow that flows through above-mentioned intakeport is detected,

Above-mentioned control unit is set the fuel injection amount from above-mentioned upstream side Fuelinjection nozzle and above-mentioned downstream side fuel injection valves inject according to the inspiratory flow that flows through above-mentioned intakeport that is detected by above-mentioned flow detection unit.

27, as claim 24 or 25 described fuel injection systems, wherein,

Above-mentioned control unit has the temperature detecting unit that detects the cooling water of internal combustion engine temperature,

Above-mentioned control unit is set the fuel injection amount from above-mentioned upstream side Fuelinjection nozzle and above-mentioned downstream side fuel injection valves inject according to the cooling water of internal combustion engine temperature that is detected by the said temperature detection unit.

28, a kind of fuel injection system has:

Be communicated in the intakeport more than 2 of firing chamber;

Aspirating valves is separately positioned on the end of the above-mentioned intakeport more than 2, opens and closes between above-mentioned intakeport and the above-mentioned firing chamber;

Fuelinjection nozzle is separately positioned in the above-mentioned intakeport more than 2, burner oil in flowing through above-mentioned intakeport air-breathing; And

The emitted dose control unit is to each above-mentioned Fuelinjection nozzle control fuel injection amount.

29, fuel injection system as claimed in claim 28, wherein,

Above-mentioned emitted dose control unit is controlled the fuel injection amount of above-mentioned Fuelinjection nozzle according to the inspiratory flow that flows through each above-mentioned intakeport.

30, fuel injection system as claimed in claim 28, wherein,

Above-mentioned emitted dose control unit is controlled the fuel injection amount of above-mentioned Fuelinjection nozzle according to the lift amount of each above-mentioned Aspirating valves.

31, fuel injection system as claimed in claim 30, wherein,

In the lift amount of above-mentioned Aspirating valves is specified value when following, and it is above-mentioned injects fuel the intakeport below the specified value that above-mentioned emitted dose control unit stops from being arranged on this lift amount.

32, as any described fuel injection system in the claim 28 to 31, wherein,

The fuel injection amount of the above-mentioned Fuelinjection nozzle time per unit separately more than 2 is roughly the same,

Above-mentioned emitted dose control unit control is from the fuel injection time of each above-mentioned Fuelinjection nozzle.

33, as any described fuel injection system in the claim 28 to 31, wherein,

The fuel injection amount difference of the above-mentioned Fuelinjection nozzle time per unit separately more than 2,

Above-mentioned emitted dose control unit will be controlled to be roughly the same from the fuel injection time of each above-mentioned Fuelinjection nozzle.

34, as any described fuel injection system in the claim 28 to 31, wherein,

The fuel injection amount of the above-mentioned Fuelinjection nozzle time per unit separately more than 2 is different with fuel injection time,

Above-mentioned emitted dose control unit is controlled fuel injection amount and discharge time from above-mentioned fuel injection valves inject according to the operating condition of above-mentioned internal-combustion engine.

35, fuel injection system as claimed in claim 34, wherein,

Above-mentioned emitted dose control unit is,

In the specified time limit that begins from above-mentioned internal combustion engine start, be specified value when following in the temperature of above-mentioned internal-combustion engine, from the little injects fuel of the fuel injection amount of time per unit, till above-mentioned Aspirating valves is opened above-mentioned intakeport,

At the load of above-mentioned internal-combustion engine is specified value when above, above-mentioned Aspirating valves open above-mentioned intakeport during, from the big injects fuel of the fuel injection amount of time per unit.

36, as any described fuel injection system in the claim 28 to 31, wherein,

Above-mentioned emitted dose control unit control is from the fuel injecting times of the time per unit of the above-mentioned Fuelinjection nozzle more than 2.

37, as any described fuel injection system in the claim 28 to 36, wherein,

Above-mentioned intakeport more than 2 internal diameter difference separately,

Set fuel injection angle according to the internal diameter of each above-mentioned intakeport from each above-mentioned Fuelinjection nozzle.

38, as any described fuel injection system in the claim 28 to 37, wherein,

Above-mentioned Fuelinjection nozzle more than 2 comprises: first Fuelinjection nozzle has the angle of attack of setting according to the internal diameter of above-mentioned intakeport; With second Fuelinjection nozzle, have the angle of attack bigger than the angle of attack of above-mentioned first Fuelinjection nozzle,

Above-mentioned emitted dose control unit, under the situation of when above-mentioned Aspirating valves closes valve, spraying, the control emitted dose so that from the emitted dose of above-mentioned first Fuelinjection nozzle than many from the emitted dose of above-mentioned second Fuelinjection nozzle; Under the situation of when above-mentioned Aspirating valves is driven valve, spraying, the control emitted dose so that from the emitted dose of above-mentioned second Fuelinjection nozzle than many from the emitted dose of above-mentioned first Fuelinjection nozzle.

39, a kind of fuel injection system is the fuel injection system of internal-combustion engine, and this internal-combustion engine has: the intakeport more than 2 that is communicated in fuel chambers; And Aspirating valves, be separately positioned on the end of the above-mentioned intakeport more than 2, open and close between above-mentioned intakeport and the above-mentioned firing chamber; In this fuel injection system, have:

Fuelinjection nozzle is separately positioned in the above-mentioned intakeport more than 2, burner oil in flowing through above-mentioned intakeport air-breathing; With

The injection timing control unit is to each above-mentioned Fuelinjection nozzle control fuel injection timing.

40, fuel injection system as claimed in claim 39, wherein,

Above-mentioned injection timing control unit is controlled the fuel injection timing of above-mentioned Fuelinjection nozzle according to the opening/closing timing of the above-mentioned Aspirating valves that opens and closes each above-mentioned intakeport.

41, fuel injection system as claimed in claim 40, wherein,

Above-mentioned Fuelinjection nozzle more than 2 comprises at least one early stage burner oil injection valve and the later stage burner oil injection valve except that above-mentioned early stage burner oil injection valve,

Above-mentioned injection timing control unit will be set in from the fuel injection timing of above-mentioned early stage burner oil injection valve before the above-mentioned Aspirating valves lifting; To be set in from the fuel injection timing of above-mentioned later stage burner oil injection valve and begin after the fuel of above-mentioned early stage burner oil injection valve sprays.

42, fuel injection system as claimed in claim 41, wherein,

Above-mentioned injection timing control unit will be set in from the fuel injection timing of above-mentioned later stage burner oil injection valve after the fuel of above-mentioned early stage burner oil injection valve sprays end.

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