CN1576571A - Fuel feeding device - Google Patents

Abstract

A fuel pump P, the electromagnetic fuel injection valve J, and a pressure regulator R are integrally fixed to a base body B. A fuel discharge path 5 of the fuel pump P, a fuel inflow path 32D of the fuel injection valve J, and a fuel inflow path 52 of the pressure regulator R are connected through a fuel passage 61 in the base body B. The base body B is mounted on an intake pipe 70, the fuel injection valve J is supported by the intake pipe 70 and the base body B, and a nozzle hole 38A is opened and arranged in the intake pipe 70. A fuel inflow path 16 of the fuel pump P is connected to a fuel tank T through a fuel inflow pipe 80. A return fuel passage 51 of the pressure regulator R is connected to the fuel tank T through a return fuel pipe 83.

Description

Fuel supplying device

Technical field

The present invention relates to a kind of fuel injection system, wherein the pressure that is stored in the fuel in the fuel tank is risen by petrolift, the fuel that this pressure is risen feeds to motor by fuel injection valves inject, wherein is particularly related to a kind of fuel supplying device that constitutes by petrolift and Fuelinjection nozzle.

Background technique

Open the spy and to have provided existing fuel supplying device in the 2001-221137 communique.Wherein particularly Fig. 8 of this communique discloses following content.

That is, plunger pump is connected setting with nozzle to be integral, and in bottom spacer element setting regularly by riveted joint of the pump main body that constitutes plunger pump, twist on this spacer element the top of the cylindrical shell of nozzle.

In addition, nozzle comprises the inlet throttle nozzle, and this inlet restriction (orifice) nozzle passes through the fuel that rises at the later stage of force feed stroke areal pressure; Outlet throttling nozzle, this outlet throttling nozzle are used to make a part of circulation by the fuel of inlet restriction nozzle, spray fuel that passes through the inlet restriction nozzle and the fuel that passes through the residual quantity between the fuel of outlet throttling nozzle.

According to above-mentioned existing fuel supplying device, nozzle ejection is passed through the fuel of inlet restriction and is passed through the fuel of the residual quantity between the fuel of outlet throttling, with according to the Fuelinjection nozzle of the existing electromagnetic type of the injection of carrying out fuel from the injection signal of ECU (by the current"on"time of solenoid, the opening of control needle-valve) compares, be difficult to supply with the correct fuel that can't carry out electric control valve body.

In addition, be arranged at electromagnetic coil itself heating in the plunger pump, this heat heats the cylindrical shell that constitutes nozzle from constituting the spacer element of plunger pump, and the temperature of the fuel that flows in nozzle is risen.

According to top description, produce steam in the fuel that in nozzle, flows, this steam makes towards the fuel quantity of suction tude internal spray inhomogeneous, or the supply of fuel is interrupted.

Particularly for the no-load running of motor, less zone such as the fuel consumption of low-speed running etc. is not preferred to these situations.

Also have, when the long no-load running of motor, under the situation, the temperature of suction tude rises widely during the high capacity low-speed running etc.

On the other hand, the front end of nozzle inserts and to be arranged in the suction tude, and thus, then the plunger pump that is integrally formed with nozzle also is provided with near suction tude.

According to top description, then the temperature of the rising in the suction tude acts on plunger pump easily, is easy to generate steam in the plunger pump that temperature rises.

According to top description,, be difficult to the pump performance that keeps stable because the compression pump delivery of the steam in the plunger pump is easy to generate difference.

Have again, when masterpiece is used on any one of plunger pump, nozzle outside, another parts are deformed, so when for example external force acts on the plunger pump, this power deforms the cylindrical shell of nozzle by the spacer element of plunger pump, the level and smooth action of the slide member of the poppet valve that obstruction is moved in cylindrical shell etc.

Particularly, for as motorcycle, machine outside, the occasion that the such suction tude of universal machine is externally exposed is not preferred.

In addition, must be equipped with following fixed mechanism specially, the fuel supplying device that this fixed mechanism is used for being made of plunger pump, nozzle is fixed in the fixing part of suction tude.

Summary of the invention

Main purpose of the present invention is to provide a kind of fuel supplying device, this fuel supplying device can adopt existing electro-magneto fuel injector, carry out correct fuel supply, and simplify installation and whole fuel pipe of relative motor, particularly be fit to motorcycle, machine outside, universal machine seldom is subjected under the situation of motor atmosphere Temperature Influence in addition, can suppress the generation of the steam in petrolift and the Fuelinjection nozzle, can carry out correct, stable fuel supply.

The first feature scheme of fuel supplying device of the present invention is such, a kind of fuel supplying device, wherein in fuel injection system, by petrolift the pressure of the fuel in the fuel tank is risen, the fuel that this pressure rises is supplied with to engine spray by Fuelinjection nozzle, on main body, be integral petrolift, Fuelinjection nozzle, pressure regulator are installed, and the fuel drain passageway of petrolift, the fuel of Fuelinjection nozzle are flowed into the fuel inflow path connection of path, pressure regulator by the fuel flow path that is opened in the main body;

Main body with above-mentioned petrolift, Fuelinjection nozzle and pressure regulator is installed on the suction tude, and the spray-hole of the Fuelinjection nozzle of supporting by main body and suction tude is towards the suction tude inner opening.

According to this first feature scheme, petrolift, Fuelinjection nozzle and pressure regulator be integral be installed on the main body, the fuel that can flow into path and pressure regulator by the fuel that the fuel flow path in the main body connects fuel drain passageway, the Fuelinjection nozzle of petrolift flows into path.

By main body is installed on the suction tude, Fuelinjection nozzle props up and is held between suction tude and the main body, and the spray-hole of Fuelinjection nozzle is provided with towards the suction tude inside opening.

In addition, the fuel of petrolift flows into path and is connected with fuel tank by pipe, and the fuel passage of returning of pressure regulator also is connected with fuel tank by pipe.

Also have, be fixedly set on the suction tude, fuel supplying device is fixed on the fixing part by the main body that will have petrolift, Fuelinjection nozzle and pressure regulator, petrolift and fuel tank, be connected by pipe with pressure regulator with fuel tank, thus, form fuel pipe.

Have again, fuel in the fuel tank boosts by petrolift, to the fuel of in the fuel flow path of main body, discharging from the fuel drain passageway of petrolift, compress into row control by pressure regulator combustion according to the rules, the fuel that this pressure is adjusted can be supplied with correct fuel by the Fuelinjection nozzle of electromagnetic type towards intake manifold injection corresponding to the injection signal from ECU.When petrolift drives, the electromagnetic coil of petrolift heating itself, but this heat reduces by main body, suppresses the transmission of heat towards Fuelinjection nozzle.

So, can be suppressed at the rising of Fuelinjection nozzle internal flow fuel temperature, and then reduce the generation of the steam in the Fuelinjection nozzle.

In addition, petrolift is arranged at the position of leaving with suction tude corresponding to the specification of main body, thus, the temperature because of the heat petrolift of suction tude does not rise greatly, can suppress the generation of the steam in the petrolift, keeps the pumping action of petrolift thus well.

In addition, the present invention is on the above-mentioned first feature scheme, its second feature scheme is the vertical axis line of the fuel drain passageway of above-mentioned petrolift, and the fuel of Fuelinjection nozzle flows into the vertical axis line of path, is arranged on the same straight line with the vertical axis line of the fuel flow path of main body B.

According to the above-mentioned second feature scheme, can improve from petrolift by the straight movement of fuel flow path towards the fuel stream of Fuelinjection nozzle inside, the reactivity of the fuel supply in the time of particularly can improving engine start.

In addition, the present invention is on the above-mentioned first feature scheme, and its 3rd feature scheme is that the vertical axis line that vertical axis line that the fuel of vertical axis line, the pressure regulator R of the fuel drain passageway of above-mentioned petrolift flows into path is arranged on the same straight line by fuel flow path and the fuel of Fuelinjection nozzle flows into path is arranged to intersect by fuel flow path with the vertical axis line of the fuel outflow pathway of petrolift.

According to above-mentioned the 3rd feature scheme, the fuel of discharging from petrolift acts in the fuel chambers of pressure regulator immediately by fuel flow path easily, so can realize the pressure corrective action of the fuel in the fuel flow path, can further improve controlled from the fuel of fuel injection valves inject in the not free situation following moment that postpones.

Also have, because when Fuelinjection nozzle moves, flowing into the fluctuation pressure that path produces towards upstream side from the fuel of Fuelinjection nozzle conflicts fuel flow path on one's own initiative, so can in fuel flow path, make the fluctuation pressure decay effectively, like this, the pulsation transmission of the main body, fuel pipe etc. of the upstream side of Fuelinjection nozzle can be reduced by Fuelinjection nozzle, the generation of the noise of vibration can be suppressed to follow.

Have, the present invention is on the above-mentioned first feature scheme again, and its 4th feature scheme is that the fuel chambers recess of above-mentioned pressure regulator is integrally formed on main body,

According to the 4th feature scheme, the fuel supplying device of following cheapness can be provided, it needn't be equipped with the fuel chambers body of the fuel chambers recess that forms pressure regulator specially, can cut down number of components and also can compactly device integral body be concentrated with the installation exercise of the relative main body of fuel chambers body.

In addition, the present invention is on the above-mentioned first feature scheme, its the 5th feature scheme is provided with the high pressure side fuel filter in the fuel flow path of aforementioned body, in the fuel flow path in the downstream side of high pressure side fuel filter, the fuel that opening has the fuel of Fuelinjection nozzle to flow into path, pressure regulator flows into path.

According to above-mentioned the 5th feature scheme, owing to will remove the fuel supply Fuelinjection nozzle and the pressure regulator of the cleaning of foreign matter by the high pressure side fuel filter, so can stably use these devices chronically.In addition, the high pressure side fuel filter is arranged on the main body, can improve the degrees of freedom of the setting of high pressure side fuel filter like this, and can improve the degrees of freedom of the selection of filter area, in addition, can improve the installation of high pressure side fuel filter, the maintenance of pulling down.

In addition, the 6th feature scheme of the present invention is, a kind of fuel supplying device, wherein in fuel injection system, by petrolift the pressure of the fuel in the fuel tank is risen, the fuel that this pressure rises is supplied with to engine spray by Fuelinjection nozzle, on main body, be integral petrolift is installed, Fuelinjection nozzle, pressure regulator and ripple damper, and by being opened in the fuel flow path among the main body B, fuel drain passageway with petrolift, Fuelinjection nozzle fuel flows into path, the fuel of pressure regulator flows into path and is connected with the fuel inflow path of ripple damper, has above-mentioned petrolift, Fuelinjection nozzle, the main body of pressure regulator and ripple damper is installed on the suction tude, and the spray-hole of the Fuelinjection nozzle of supporting by main body and suction tude is towards the suction tude inner opening.

According to above-mentioned the 6th feature scheme, can be by main body be installed on the suction tude, petrolift, Fuelinjection nozzle, pressure regulator, ripple damper are installed on the suction tude, and Fuelinjection nozzle can be propped up and be held between suction tude and the main body, the spray-hole of Fuelinjection nozzle is provided with towards the suction tude inner opening.

In addition, can be connected with fuel tank by the fuel inflow path of pipe with petrolift, the return path of pressure regulator also is connected with fuel tank by pipe.

In addition, the pressure of the fuel in the fuel tank rises by petrolift, and the fuel drain passageway by petrolift is discharged in the fuel flow path of main body.In addition, this fuel is compressed into the fluctuation pressure that row control and fuel flow path produce by pressure regulator combustion according to the rules and is decayed on one's own initiative by ripple damper.

So, with pressure adjustment according to the rules and make the fuel of fluctuation pressure decay be supplied to the Fuelinjection nozzle of electromagnetic type effectively, will feed to suction tude with the corresponding correct fuel of the injection signal of ECU by Fuelinjection nozzle.

Also have, decay by ambassador's fluctuation pressure in the above description, thus, can pass through Fuelinjection nozzle, further suppress the vibration of the main body, fuel pipe etc. of upstream side.

Have again, identically with the above-mentioned first feature scheme suppress the generation of the steam in the Fuelinjection nozzle and the generation of the steam in the petrolift, thus, can supply with correct fuel and can keep the pump performance of petrolift well by the Fuelinjection nozzle of electromagnetic type.

In addition, the present invention is on the 6th feature scheme, and its 7th feature scheme is that the fuel chambers recess of above-mentioned pressure regulator and the fuel chambers recess of ripple damper are integrally formed on main body.

According to above-mentioned the 7th feature scheme, needn't be equipped with the fuel chambers body of the fuel chambers recess that forms pressure regulator and dampening chamber's body of the dampening chamber that forms ripple damper specially, can reduce number of components, cut down the installation exercise of fuel chambers body and the relative main body of dampening chamber's body, can help the reduction of the manufacture cost of fuel supplying device, and can compactly whole device be concentrated.

In addition, the present invention is on the above-mentioned first or the 6th feature scheme, its the 8th feature scheme is that vertical axis line that fuel that the fuel of above-mentioned Fuelinjection nozzle flows into the vertical axis line of path, ripple damper the flows into path fuel by main body flows into path and is arranged on the same straight line, and the vertical axis line of the fuel of the vertical axis line of the fuel drain passageway of petrolift and pressure regulator inflow path is arranged on the same straight line by fuel flow path.

According to above-mentioned the 8th feature scheme, because of flowing into path from the fuel of Fuelinjection nozzle, the driving by Fuelinjection nozzle acts on ripple damper immediately by fuel flow path, so the fluctuation pressure that can further decay effectively towards the fluctuation pressure of upstream side.

On the other hand, the fuel of discharging in fuel flow path from the fuel drain passageway of petrolift acts on pressure regulator easily immediately, so but moment carry out the pressure corrective action of the fuel in the fuel flow path.

So, can correct fuel be sprayed supply in suction tude by Fuelinjection nozzle, can further suppress the vibration of main body, fuel pipe etc.

In addition, the present invention relates to the first or the 6th feature scheme, its 9th feature scheme is to form aforementioned body by the synthetic resin material.

According to above-mentioned the 9th feature scheme, owing to adopt its thermal conductivity to be lower than the material of metallic material, so can suppress that the temperature of the Fuelinjection nozzle that heat that the electromagnetic coil of petrolift produces causes rises and the temperature of the petrolift that the heat of suction tude causes rises, can keep the discharging performance of stable petrolift also can carry out correct stable fuel supply from Fuelinjection nozzle.

Also have, the present invention is on the first or the 6th feature scheme, its the tenth feature scheme is towards same peripheral direction, is provided with the joiner that the electromagnetic coil interior with being arranged at above-mentioned petrolift is connected, with the joiner that is connected with the electromagnetic coil that is arranged at Fuelinjection nozzle inside.

According to above-mentioned the tenth feature scheme, can be easy as can, and in the utmost point short time, carry out the connection operation of joiner with the matrix link that is connected with external power supply of petrolift, and the connection operation of the joiner of Fuelinjection nozzle and the matrix link that is connected with external power supply, can improve and be electrically connected operation.

Have, the present invention relates to the first or the 6th feature scheme, it the 11 is characterised in that the fuel that the low voltage side fuel filter is installed on above-mentioned petrolift flows in the path with being integral.

According to the 11 feature scheme, because by petrolift, the low voltage side fuel filter is integral is installed on the main body, so main body is fixed on the suction tude, thus, finish the installation of low voltage side fuel filter simultaneously.

So, the installation that can improve the low voltage side fuel filter greatly.

Description of drawings

Fig. 1 is an embodiment's of expression fuel supplying device of the present invention longitudinal sectional view.

Fig. 2 is installed on the overall system view of the fuel injection system on the suction tude for fuel supplying device of the present invention.

Fig. 3 is the fixed iron core of presentation graphs 1, and the fuel of Fuelinjection nozzle flows into path, the longitudinal sectional view of the relation of the fuel flow path of main body.

Fig. 4 is second embodiment's of expression fuel supplying device of the present invention major component longitudinal sectional view.

Fig. 5 is the 3rd embodiment's of expression fuel supplying device of the present invention major component longitudinal sectional view.

Fig. 6 is the 4th embodiment's of expression fuel supplying device of the present invention major component longitudinal sectional view.

Fig. 7 is the 5th embodiment's of expression fuel supplying device of the present invention major component longitudinal sectional view.

Fig. 8 is the 6th embodiment's of expression fuel supplying device of the present invention major component longitudinal sectional view.

Fig. 9 is the 7th embodiment's of expression fuel supplying device of the present invention major component longitudinal sectional view.

Symbol description: 5 fuel drain passageways; 32D fuel flows into path; The 38A spray-hole; 52 fuel flow into path; 56A fuel chambers recess; 61 fuel flow paths; 70 suction tude; 84 high pressure side fuel filters; 92A fuel chambers recess; 93A fuel chambers recess; The P petrolift; The J Fuelinjection nozzle; The R pressure regulator; The D ripple damper.

Embodiment

Below by Fig. 1, the fuel supplying device that an embodiment of fuel supplying device of the present invention is described is by petrolift P, Fuelinjection nozzle J, and main body B, pressure regulator R constitutes.

Petrolift P such as following as formation.

1 expression coil carrier, its cylindrical part 1A by tubular, below lip part 1B, top lip part 1C constitute, this below lip part 1B extends from the bottom peripheral direction of cylindrical part 1A, this top lip part 1C extends from the top peripheral direction of cylindrical part 1A, in the periphery of cylindrical part 1A, be wound with electromagnetic coil 2.

3 expression fixed iron cores, this fixed iron core is formed by magnetic material, its head portion is with the below part in the interior week of the cylindrical part 1A that inserts as be arranged at coil carrier 1, and the interior perimembranous of bottom side magnetic sheet 4A (forming by magnetic material) of ring-type of bottom surface of below lip part 1B that is arranged at coil carrier 1 is with the periphery magnetic combination of magnetic as the bottom part that is connected in fixed iron core 3.

In the said fixing iron core, head portion extends in the cylindrical part 1A of coil carrier 1 and inserts, and bottom part forms towards below more highlightedly from downside pole plate 4A, connects towards the bottom from the top of fixed iron core 3 and offers fuel drain passageway 5.In addition, 6A represents to be arranged at first seal ring of periphery of the bottom part of fixed iron core 3,6B represents to be arranged at second seal ring of periphery of the head portion of fixed iron core 3, and this second seal ring 6B is pressed against on the no loading pipe 7 of interior week configuration of the circumferential part 1A that is arranged on coil carrier 1.

This no loading pipe 7 is provided with to give prominence to towards the more top of the top of coil carrier 1 lip part 1C.

8 expression movable plunger formula iron cores, it is formed by magnetic material, be mounted slidably interior week in no loading pipe 7, and subtend is arranged at the top of fixed iron core 3, and the top of the intermediate portion in this movable plunger formula unshakable in one's determination 8 and the outstanding 8A of guide cylinder portion go up from the top to connect to the bottom and be formed with plunger path 8B.In addition, be formed with above this plunger path 8B with below the discharge valve seat 9 that faces, according to facing discharge check valve 11 is set with this discharges valve seat 9.By discharging spring 10A, should discharge check valve 11 and push towards discharging valve seat 9.

12 expressions can be with the slide cylinder part of the 8A of guide cylinder portion of support activities plunger 8 of micro-gap, and the top of pilot hole 12A is towards the open-topped of cylinder part 12, and this pilot hole 12A is formed on this cylinder part 12 and supports the guide cylinder 8A of portion.In addition, be provided with above the pilot hole 12A with below the suction valve seat 13 that faces, in addition, and suck valve seat 13 and face to be provided with and suck check valve 14.By sucking spring 10B, should suck check valve 14 and push towards inlet valve seat 13.

In addition, be fixedly set at above-mentioned cylinder part 12 and flow in the joint 15, this inflows joint 15 is fixedly set on the top side pole plate 4B (by magnetic material formation) of ring-type of end face of the top lip part 1C that is configured in coil carrier 1.In addition, above-mentioned inflow joint 15 comprises that fuel flows into path 16, and this fuel flows into that path 16 has the recess of the upper section of admitting no loading pipe 7 and towards the top opening, and is communicated with by the pilot hole 12A that offers in suction valve seat 13 and the parts 12.

If once more movable plunger formula iron core 8 is described, then in movable plunger formula iron core 8, the 8A of guide cylinder portion props up on the pilot hole 12A that is held in cylinder part 12 slidably with micro-gap, and keeps the balance of certain position by lower spring 17A and upper spring 17B.

The bottom of this lower spring 17A and the top of fixed iron core 3 fasten, and the bottom surface 8C of the intermediate portion of its top and movable plunger formula iron core 8 fastens.

In addition, the end face 8D of the intermediate portion of the bottom of upper spring 17B and movable plunger formula iron core 8 fastens, and the bottom surface of the lip part of its top and cylinder part 12 fastens.

As mentioned above, then at cylinder part 12, suck formation pump chamber 18 among valve seat 13 and the pilot hole 12A that discharges between the valve seat 9.

Also have, 19 expressions are formed by magnetic material and are yoke cylindraceous, by the top thinner wall section of this yoke 9 is riveted towards inside, to flow into joint 15, top side pole plate 4B fixes towards the top of coil carrier 1 lip part 1C, bottom thinner wall section by this yoke 19 is riveted towards inside, and the bottom side magnetic sheet 4A that will have fixed iron core 3 fixes towards the below of coil carrier 1 lip part 1B.

As mentioned above, then, form magnetic loop by yoke 19-top side pole plate 4B-movable plunger formula 8-fixed iron core unshakable in one's determination 3-bottom side pole plate 4A-yoke 19.

In addition, 19A represents the installation sheet portion of another parts, removes the part of yoke 19, then it is bent to form towards the bottom side.On the 19A of this installation sheet portion, offer mounting hole 19B.

The a pair of convex terminal pin of 20 expressions, this convex terminal pin is connected with the final stage winding with the elementary winding of electromagnetic coil 2, and this convex terminal pin two 0 is given prominence at the inner bottom part of joiner 21 and is buried underground.

Above-mentioned joiner 21, by the synthetic resin material with the top thinner wall section of yoke 19 and flow into joint 15 below periphery carry out forming simultaneously when molded automatically.

Under face Fuelinjection nozzle J and be described.

The coil carrier that 30 expression synthetic resin materials form, it is made of cylindrical part 30A, top lip part 30B and below lip part 30C, twines electromagnetic coil 31 on the periphery of cylindrical part 30A.

The inflow joint that 32 expressions are formed by magnetic material, this inflow joint 32 comprises fixed iron core 32B and intake channel 32C, this fixed iron core 32B has the top side pole plate 32A on the top lip part 30B that is arranged at coil carrier 30, and from the below of the bottom surface of top side pole plate 32A and give prominence to, this intake channel 32C is from the top of the end face of top side pole plate 32A and give prominence to.

Offer fuel from the top of intake channel 32 towards the perforation of the bottom of fixed iron core 32B and flow into path 32D, embedded ring-spring adjustment pipe 33 below in this fuel flows into path 32D, facing.

In addition, be provided with the 3rd seal ring 34 near the annular slot of the periphery the top that is opened in intake channel 32, the periphery of the intake channel 32 of the below of this external the 3rd seal ring 34 offers to install and uses annular slot 32E.Be preferably, the shape of cross section of this annular slot 32E is the breach toroidal that is the cutting of D shape.

This groove 32E is used to suppress the rotation of Fuelinjection nozzle J.

In addition, the top side pole plate 32A of above-mentioned inflow joint is arranged on the top lip part 30B of coil carrier 30, and fixed iron core 32B insertion is arranged in the cylindrical part 30A of coil carrier 30.

35 expression magnetic cores, its be arranged at movably in the cylindrical part 30A of coil carrier 30 and with the bottom end subtend configuration of fixed iron core 32B, by spring 36, with this magnetic core 35 towards the direction biasing of leaving fixed iron core 32B.

37 expressions are concaved with coil carrier receiving opening 37B from basically forming in the bottom of intermediate portion, and are concaved with valve body receiving opening 37C towards the below by the yoke that magnetic material forms towards the top.

Also have, in the coil carrier receiving opening 37B of yoke 37, admittance has coil carrier 30 with electromagnetic coil 31 and the top side magnetic sheet 32A that flows into joint 32, in this state, the top side thinner wall section that is formed at the top of yoke 37 is riveted to inside towards the top of top side pole plate 32A.

38 are illustrated in the valve body that the bottom offers spray-hole 38A, in this valve body 38, are provided with needle-valve 39 movably, and this needle-valve 39 is provided with the 39A of mitre valve portion that spray-hole 38A is opened and closed, on the fixing above-mentioned magnetic core 35 in the top of this needle-valve 39.

Above-mentioned magnetic core 35 and have the valve body 38 of needle-valve 39 inserts from the below and is arranged in the valve body receiving opening 37C of yoke 37, and the thinner wall section of the bottom of yoke 37 is riveted to inside towards the diameter diminution part of valve body 38.

The a pair of convex terminal pin of 40 expressions, this convex terminal pin is connected with terminal winding with the elementary winding of electromagnetic coil 31, and this convex terminal pin 40 is caught outstanding burying underground at the interior end of joiner 41.

Above-mentioned joiner 41, by the synthetic resin material to the top thinner wall section of yoke 37 and flow into joint 32 below periphery carry out forming simultaneously when molded automatically.

Also have, 42 expressions are arranged at the 4th interior seal ring of annular slot of the periphery of the bottom end vicinity that is opened in yoke 37.

Under face pressure regulator R and be described.

The fuel chamber main body of cup-shaped at the bottom of the 50 expression top open band, return fuel passage 51 from inner bottom part towards the top opening, and fuel flow into road 52 from the sidewall of fuel chamber main body 50 towards the side opening.

Have, above-mentioned fuel flows into path 52 and is opened in the outstanding inflow path propeller boss 52A that forms in the left side side of fuel chamber main body 50 again, and the periphery flowing into path propeller boss 52A offers the mounting groove 52B of ring-type, and the 5th seal ring 53 is installed.

In addition, 54 expression spring housing main bodys, this spring housing's main body is the top opening of cup (cup) the shape sealing fuel chamber main body 50 of being with the end, between the lower opening of opening above the fuel chamber main body 50 and spring housing's main body 54, be provided with for example barrier film (diaphragm) 55 that is discoideus, by the bottom periphery of spring housing's main body 54 is riveted two closure of openings towards the top of fuel chamber main body 50 periphery.

As mentioned above, bottom surface and fuel chamber main body 50 by barrier film 55 are separated to form fuel chambers 56, and the end face by barrier film 55 and spring housing's main body 54 are separated as formed spring housing 57.

That is, fuel chambers 56 and spring housing 57 are separated to form by barrier film 55, return fuel passage 51 at the above-below direction opening in fuel chambers 56, and substantially horizontal opening fuel flows into path 52.

In addition, 58 expressions and opening portion in the fuel chambers 56 of returning fuel passage 51 face the control valve that is provided with and synchronously moves with barrier film 55, be arranged at Regulation spring 59 in the spring housing 57 by compression, with of the opening portion biasing of this control valve 58 towards the fuel chambers 56 of fuel passage 51.

Below main body B is described.

Main body B comprises the right side side's extension installation arm 60B from bottom 60A, and connect the fuel flow path 61 of offering above-below direction towards bottom 60A from top 60C, the right-hand member 60D of this external intermediate portion towards above-mentioned fuel flow path 61 offers the fuel flow path 61 of substantially horizontal.

In addition, in above-mentioned fuel flow path, the fuel flow path 61 of 60C place, the top opening of main body B forms following diameter, this diameter can make the fixed iron core outstanding from the below of the bottom side pole plate 4A of petrolift P 3 insert these streams, the fuel flow path 61 of the bottom of main body B 60A opening form the annular slot 32E that can make Fuelinjection nozzle J above intake channel 32C insert diameter in this stream.

In this example, the fuel flow path 61 of opening is with greater than at the diameter of the fuel flow path 61 of lower opening and form up, is formed with the stepped part 60E above facing near above the fuel flow path 61.

Also have, form the diameter of the inflow path propeller boss 52A that can insert pressure regulator R at the fuel flow path 61 of the right-hand member 60D of main body B opening.

Have again, be formed on the same straight line at the fuel flow path 61 that above-below direction is offered, more particularly, make the fuel flow path 61 of the top opening that the fixed iron core 3 of petrolift P inserts, the fuel flow path 61 of the lower opening of inserting with the intake channel 32C that makes Fuelinjection nozzle J is formed on the same straight line.

In addition, 62 expressions, first interior threaded hole, this hole 62 is offered towards the top of main body B 60C and is used to install petrolift, this hole 63 expressions second interior threaded hole, this hole 63 is offered towards the bottom of main body B 60A and is used to install Fuelinjection nozzle, and 64 expressions are to run through the mounting hole of installing among the arm 60B as being opened in.

In addition, for pressure regulator R is installed on the main body B, the interior threaded hole that the pressure regulator that is arranged at the right-hand member 60D of main body B is installed usefulness omits and does not illustrate in the drawings.

Then, petrolift P, Fuelinjection nozzle J and pressure regulator R, petrolift P such as following being installed on the main body B are installed on main body B.

In the fuel flow path 61 on being opened on the top 60C of main body B, be inserted with the bottom of the fixed iron core 3 of petrolift P, and the lip part 3A of fixed iron core 3 that is formed at the below of bottom side pole plate 4A is arranged on the top 60C of main body B with contact, under this state, the mounting hole 19B of the 19A of installation sheet portion by yoke 19 screws togather first interior threaded hole 62 of screw 65 with main body B.

As mentioned above, then the below of the fixed iron core 3 by will constituting petrolift P is inserted in the fuel flow path 61 of main body B, petrolift P stands to establish to prop up and is held on the top 60C of main body B, and the 19A of installation sheet portion is screwed together on the main body B by screw thread 65, and petrolift P is installed on the top 60C of main body B regularly thus.

Also have, the gas seal that is inserted between interior week of the periphery of the fixed iron core 3 in the fuel flow path 61 and above-mentioned fuel flow path 61 keeps by the first seal ring 6A.

With following Fuelinjection nozzle J such as following being installed on the main body B.

The chimeric fastener 66 that is provided with a side opening in the annular slot 32E of this Fuelinjection nozzle J (forming) by the circular groove of breach that is D shape cutting etc., then intake channel 32C inserts and is arranged in the fuel flow path 61 of the bottom of main body B 60A opening, under this state, by being opened in the mounting hole in the fastener 66 with perforation, the screw 67 and second interior threaded hole 63 at the bottom of main body B 60A opening are screwed togather.

As mentioned above, be inserted into by the intake channel 32C that will constitute Fuelinjection nozzle J in the fuel flow path 61 of main body B, upright the establishing of Fuelinjection nozzle J is held on the bottom 60A of main body B, and fastener 66 is by screw 67, screw togather with the bottom 60A of main body B, thus, suppress the rotation of Fuelinjection nozzle J, be fixed.

In addition, keep being inserted into airtight conditions between interior week of the periphery of intake channel 32C of fuel flow path 61 inside and fuel flow path 61 by the 3rd seal ring 34.

In addition, pressure regulator R is installed on the main body B according to following.The chimeric fastener 68 that is provided with a side opening in the mounting groove 52B of pressure regulator R (the circular grooves of breach of formation D shape cutting etc.), then, flowing into path propeller boss 52A insertion is arranged in the fuel flow path 61 of the right-hand member 60D that is opened on main body B, under this state, fastener 68 screws togather (this screw, interior threaded hole are not shown in the drawings) by screw and the interior threaded hole that is opened among the right-hand member 60D of main body B.

As mentioned above, be inserted in the fuel flow path 61 of main body B by the inflow path propeller boss 52A that will constitute pressure regulator R, with the upright right-hand member 60D who is held in main body B that establishes of pressure regulator R, and fastener 68 screws togather by the right-hand member 60D of screw and main body B, thus, the rotation of pressure regulator R is suppressed, and R fixes with this pressure regulator.

Also have, be inserted into gas seal between the interior week of periphery and fuel flow path 61 of inflow path propeller boss 52A of the pressure regulator R in the fuel flow path 61 by 53 maintenances of the 5th seal ring.

Being integral the main body B that above-mentioned petrolift P and Fuelinjection nozzle J and pressure regulator R are installed is arranged on the motor according to following.

In the occasion that is described by Fig. 2,70 are illustrated in the suction tude that internal run-through offers inlet air pathway 71, and the downstream of inlet air pathway 71 is connected with motor E, and its upstream is connected with throttle valve body described later.

In addition, in suction tude 70, offer injection valve supporting hole 72, insert the bottom and the valve body 38 of the yoke 37 of Fuelinjection nozzle J in this injection valve supporting hole 72, and it is towards inlet air pathway 71 inner openings.In addition, main body support part 73 is formed on highlightedly towards oblique upper that upright being provided with starts bolt 74 on the top end 73A of main body support part 73 in suction tude 70.

On the other hand, in above-mentioned throttle valve body 75, offer the inlet air pathway 76 of inlet air pathway 71 connections of suction tude 70, this inlet air pathway 76 is realized opening and closing by the throttle valve 78 of butterfly type, and this throttle valve 78 is installed on and rotatably props up on the throttle spindle 77 that is held on the throttle valve body 75.

Carry out the rotary manipulation of this throttle spindle 77 by the operator.

Also have, the upstream side of the inlet air pathway 76 of above-mentioned throttle valve body is connected with air cleaner A.That is, removed the inlet air pathway 76 of the clean air of foreign matter by throttle valve body 75 by this air cleaner A, the inlet air pathway 71 of suction tude 70 feeds to motor E.At this moment, determine to feed to the air quantity of motor E corresponding to the opening degree of the throttle valve of operating by the operator 78.

Have, the main body B with petrolift P and Fuelinjection nozzle J and pressure regulator R is installed on the suction tude 70 by following again.

That is, the installation arm 60B of main body B is arranged on the top end 73A of main body support part 73 of suction tude 70, and the bottom of yoke 37 that comprises the valve body 38 of Fuelinjection nozzle J is inserted and is arranged in the injection valve supporting hole 72 of suction tude 70.At above-mentioned state, start bolt 74 and insert in the mounting hole 64 that arm 60B is installed, nut 79 screws togather with the startup bolt of giving prominence to from this installation arm 60B 74.

As mentioned above, main body B is installed on the suction tude 70 regularly, at this moment, comprises that the bottom of yoke 37 of the valve body 38 of Fuelinjection nozzle J is propped up in the injection valve supporting hole 72 that is held in suction tude 70.So the spray-hole 38A of bottom end that is opened on the valve body 38 of this Fuelinjection nozzle J also is opened in the injection valve supporting hole 72, spray-hole 38A is by inlet air pathway 71 inner openings of injection valve supporting hole 72 towards suction tude 70.In addition, fuel pipe promptly, has the fuel tank T of fuel and the fuel that is opened in the inflow joint 15 of petrolift P flows into path 16 in internal storage as following, connect by fuel intake channel 80.

In addition, 81 expressions are arranged at the low voltage side fuel filter in the above-mentioned fuel intake channel, and 82 expressions are arranged at the filter screen of opening end of the fuel tank T of fuel intake channel 80.In addition, the fuel passage 51 of returning of pressure regulator R is connected by returning fuel pipe 83 with fuel tank T.

In addition, chimeric in the joiner 21 of petrolift P have a matrix link that is connected with the external power supply of ECU (Electronic Control Unit) etc., realize being electrically connected by convex terminal pin two 0, in addition, the matrix link that the external power supply of chimeric with not shown ECU etc. is connected in the joiner 41 of Fuelinjection nozzle J is realized being electrically connected by matrix terminal pin 40.

Above-mentioned ECU, the matrix link is not shown in the drawings.

According to fuel injection system with fuel supplying device as described above, when the engine running of the start-up operation that comprises motor, export electrical signal from ECU towards petrolift P, when the electromagnetic coil 2 non-energisings of petrolift P, movable plunger formula iron core 8 remains on first state of the Spring balanced of upper spring 17B and lower spring 17A, and pump chamber 18 remains on little volume conditions.

Then, if to electromagnetic coil 2 energising, then movable plunger formula iron core 8 attracts mobilely downwards towards fixed iron core 3, remains on second state, and the chamber volume of pump chamber 18 increases corresponding to it moves and remains on big volume conditions.

So, if adopt the electrical signal towards electromagnetic coil 2 outputs from ECU, then movable plunger formula iron core 8 moves back and forth corresponding to above-said current signal, at the bigger state of the chamber of pump chamber 18 volume, discharge check valve 11 and will discharge valve seat 9 sealings, and suck check valve 14 and open suction valve seat 13, thus, the fuel in the fuel tank T is drawn in the pump chamber 18 by fuel intake channel 80.

On the other hand, at the less state of the chamber of pump chamber 18 volume, suck check valve 14 and will suck valve seat 13 sealings, and discharge check valve 11 and open and discharge valve seat 9, pump chamber 18 in and the fuel of pressure rising by plunger stream 8B towards 5 discharges of fuel drain passageway.

According to top description, when comprising the engine running in engine start when operation, the pressure of the fuel in the fuel tank T rises pump chamber 18 in, and the fuel of pressure rising is supplied with in the fuel flow path 61 of main body B from fuel drain passageway 5 continuously.

In addition, press the fuel pressure in the fuel flow path 61 that the pressure by above-mentioned petrolift is risen to control with the combustion of regulation.

Promptly, the fuel that flows in fuel flow path 61 is by the fuel flow path 61 of substantially horizontal, and the fuel inflow road 52 by pressure regulator R flows in the fuel chambers 56 of pressure regulator R, this fuel riddles in the fuel chambers 56, makes the barrier film 55 that comprises control valve 58 towards spring housing's 57 side shiftings.

Also have,, set the position of barrier film 55 down with the state of the elastic force that is arranged at the Regulation spring 59 in the spring housing 57 with compression balance by the pressure of setting in the fuel pressure that acts on the fuel chambers 56.

Thus, then control valve 58 is opened corresponding to the position of above-mentioned barrier film and is returned fuel passage 51, and the fuel in the fuel chambers 56 returns in fuel tank T by returning fuel pipe 83 from returning fuel passage 51.

As mentioned above, then can authorized pressure the fuel pressures in the fuel flow path 61 with fuel chambers 56 be controlled, fed to Fuelinjection nozzle J by fuel flow path 61 through the fuel of excess pressure adjustment.

On the other hand, in Fuelinjection nozzle J, identical output with petrolift P is from the electrical signal of ECU, if to electromagnetic coil 31 energisings, then the elastic force of magnetic core 35 antagonistic springs 36 attracts towards fixed iron core 32B, and the 39A of mitre velve portion of needle-valve 39 opens spray-hole 38A.

So needle-valve 39 is opened spray-hole 38A corresponding to the injection signal (current"on"time) from ECU, the fuel that the fuel flow path 61 that will be positioned at main body B is adjusted to authorized pressure feeds to the inlet air pathway 71 of suction tude 70 by spray-hole 38A.

Have, opening degree that can throttle valve 78 is controlled supply to the air quantity of supply engine again, by supplying with the fuel of being supplied with by Fuelinjection nozzle J that is controlled, with the air by throttle valve 78 controls, can carry out the running that is fit to of motor.

If adopt fuel supplying device of the present invention as described above, then on main body B, be pre-formed petrolift P and Fuelinjection nozzle J and pressure regulator R are installed, can be by a main body B be installed on the suction tude 70, parts with fuel supply system are installed on the vehicle once, can improve the assembling performance of vehicle widely.This point is for particularly as motorcycle, and the extremely limited occasion of installing space is effective.

In addition, in the connection of fuel pipe, can only the fuel inflow path 16 of petrolift P be connected with fuel tank T by fuel intake channel 80, and carry out stream with fuel tank T and be connected by the fuel passage 51 of returning of returning 83 couples of pressure regulator R of fuel pipe, the design freedom of fuel pipe can be improved, and the connection operation of pipe can be improved.

In addition, as particularly Fuelinjection nozzle wherein, employing will be the Fuelinjection nozzle J of the electromagnetic type of fuel flow rate from the electrical signal conversion of ECU, thus, can keep the fuel of existing Fuelinjection nozzle controlled, reliability.

Also have, owing to connect the high-pressure fuel pipe of petrolift P and Fuelinjection nozzle J, the high-pressure fuel pipe that extends to pressure regulator R constitutes by the fuel flow path in the main body B 61, therefore bearing pressure special worry needn't be arranged for fuel pipe.Flowing through has the fuel flow path 61 of the fuel that pressure particularly rises to be formed in the main body B, and the motorcycle that this kind situation is directly externally exposed for fuel supply system is preferred.

That is, be used under the situation of obstacle conflict even be preferably, the danger of damage still seldom, and occasion attractive in appearance.

Have again, if adopt the petrolift P that has used electromagnetic coil 2, then electromagnetic coil 2 itself generates heat when pump drives, petrolift P and Fuelinjection nozzle J directly are set, in this occasion, heat with this electromagnetic coil 2 acts on Fuelinjection nozzle J, make the tendency of the fuel temperature rising of in Fuelinjection nozzle J, flowing, but according to the present invention, because petrolift P is connected by main body B with Fuelinjection nozzle J, so, suppress the heating of 2 couples of Fuelinjection nozzle J of electromagnetic coil of petrolift P by the transmission of heat of main body B prevention towards Fuelinjection nozzle J.

According to top description, produce the situation of steam in the fuel that can suppress to be to flow in the Fuelinjection nozzle J, thus, serially correct fuel is fed in the suction tude 70.

At this moment, if the material of main body B adopts its transmission of heat degree to be lower than the synthetic resin material of metallic material, for example, nylon resin, epoxy resin, polyphenylene sulfide, then better effects if.

In addition, under the situation when time of engine low speed or high load low-speed running etc., the temperature of suction tude 70 still rises greatly, still, petrolift P directly is not connected with Fuelinjection nozzle J according to the present invention, and petrolift P is connected on the Fuelinjection nozzle J by main body B.

So the petrolift P quite size of the amount of the thickness t of main body B (shown in Figure 2) leaves suction tude 70 and is provided with.Between suction tude 70 and petrolift P, main body B is set.Thus, the temperature that can suppress the petrolift P that the heat of suction tude 70 causes rises.

According to top description, in the generation of petrolift P internal cause inhibition steam, can carry out the pumping action in the petrolift P well, its discharging performance is not subjected to any obstruction, can be with stable fuel supply Fuelinjection nozzle J.In addition, can adopt the lower electromagnetic coil of insulating properties 2, effectively reduce the manufacture cost of electromagnetic coil.In addition, as previously described, if form main body B by the synthetic resin material, then above-mentioned effect further increases.

In addition, in the time of on being loaded into vehicle, having external force and act on the petrolift P outstanding towards the top, or the Fuelinjection nozzle J that gives prominence to towards the below, or the situation of the pressure regulator R that gives prominence to towards the side.For example, even masterpiece is used for petrolift P outside, even be inserted under the situation of fixed iron core 3 distortion of the petrolift P in the fuel flow path 61 of the top 60C that is opened on main body B, this distortion does not cause any impact to Fuelinjection nozzle J or pressure regulator R, and particularly preferred using is that the said equipment externally exposes the motorcycle that is provided with.

Also have, petrolift P and Fuelinjection nozzle J, and pressure regulator R is installed on the main body B as common assembly, therefore can be simplified to fix the fixed mechanism of supporting these parts.

Have again, in occasion shown in Figure 1, vertical axis line X-X owing to the fuel drain passageway 5 in the fixed iron core 3 that is opened in petrolift P, be opened in fuel in the inflow joint 32 of Fuelinjection nozzle J and flow into the vertical axis line Y-Y of path 32D, the vertical axis line Z-Z that is opened in the fuel flow path 61 among the main body B is arranged on the same straight line, so can improve the straight movement towards the fuel of Fuelinjection nozzle, can improve the reactivity of fuel supply from petrolift P.

In this occasion, can improve the pressure that uses the head pressure of petrolift P particularly to be lower than existing head pressure (300kpa), for example the fuel supply the during startup of the electromagnetism plunger of the pressure before and after the 100kpa etc.In addition, the relation of above-mentioned shaft axis is shown in Figure 3.

In addition, in occasion shown in Figure 1, the joiner 21 of petrolift P is provided with towards same peripheral direction with the joiner 41 of Fuelinjection nozzle J, thus, then can be when above-mentioned joiner connects with the matrix link that is connected with the external power supply of ECU etc., connect from same direction, thus, can improve the connection operation.

This situation is for as motorcycle, and the occasion that installing space is restricted consumingly is effective.

Fig. 4 represents another embodiment of fuel supplying device of the present invention.

Below just different structures with Fig. 1 be described.

The fuel chambers recess 56A and the main body B that form the fuel chambers 56 of pressure regulator R are integrally formed.

Specifically, formation is from the right-hand member of the main body B fuel chambers recess 56A of the cup-shaped at the bottom of the band of side opening to the right, the opening of fuel chambers recess 56A is by barrier film 55 and 54 sealings of spring housing's main body, by the left surface and the fuel chambers recess 56A formation fuel chambers 56 of barrier film 55.In addition, the fuel flow path 61 of substantially horizontal is opened on the bottom of this fuel chambers 56, and the fuel that this fuel flow path 61 plays a part among Fig. 1 flows into path 52.

If adopt above-mentioned scheme, because but fuel chamber main body and the main body B of Fig. 1 are general, and can omit fuel chamber main body is connected with main body B, (firing chamber main body 50 flows into path propeller boss 52A, the 5th seal ring 53 in the reduction of the existing number of components of historical facts or anecdotes, fastener 68, screw), need not to connect operation, effectively reduce the manufacture cost of device.

Turn back to Fig. 1 once more and be described, 84 is the high pressure side fuel filter, and this high pressure side fuel filter is removed the foreign matter that contains from petrolift P towards the fuel of Fuelinjection nozzle J.84A represents to be the lip part of thin plate ring-type, forms the filter screen 84B that is grid bag shape towards the below of this lip part 84A.

Above-mentioned high pressure side fuel filter 84 is arranged in the fuel flow path 61 in downstream side of fuel drain passageway 5 of petrolift P in main body B.

Specifically, the stepped part 60E in the bottom of the fixed iron core 3 of petrolift P and the fuel flow path 61 is provided with lip part 84A, in the fuel flow path 61 below stepped part 60E, is provided with filter screen 84B.

According to top description, the fuel that the fuel of Fuelinjection nozzle J flows into path 32D and pressure regulator R flows into path 52, with are connected in the fuel flow path 61 in the downstream side of high pressure side fuel filter 84, will feed to Fuelinjection nozzle J and pressure regulator R by the clean fuel that high pressure side fuel filter 84 has been removed foreign matter.

If above-mentioned high pressure side fuel filter 84 is arranged in the fuel flow path 61 of main body B, and be arranged at the downstream side of the fuel drain passageway 5 of petrolift P, then need not the pipe arrangement of high pressure side fuel filter 84 is connected.Need not shell on every side around high pressure side fuel filter 84.Thus, can reduce the manufacture cost of high pressure side fuel filter 84.

In addition, because high pressure side fuel filter 84 can be fetched into the outside by petrolift P is pulled down from main body B, so high pressure side fuel filter 84 can be realized safeguarding easily.

Also have, consider that fuel that above-mentioned high pressure side fuel filter 84 is arranged at the inflow joint 32 of fuel drain passageway 5 inside of said fixing iron core 3 or Fuelinjection nozzle J flows into the situation in the path 32D, but, thus, then because the filter area of high pressure side fuel filter 84 is subjected to the restriction of these stream diameters, so be difficult to obtain sufficient filter area.

This situation if high pressure side fuel filter 84 is arranged in the fuel flow path 61, then can be selected the high pressure side fuel filter that is fit under the situation that is not subjected to above-mentioned restriction relatively.

Have, the shape of high pressure side fuel filter is not subjected to the restriction of the foregoing description again.

Below by Fig. 5, another embodiment is described.

The formation as following of the fuel flow path of main body B.

Offer the fuel flow path 61 of substantially horizontal from the left end 60G of main body B towards right-hand member 60D, offer the fuel flow path 61 of above-below direction from the bottom 60A of main body B towards the inside of the fuel flow path 61 of substantially horizontal.

In addition, in the fuel flow path 61 of the left end 60G that is opened on main body B, insert the fixed iron core 3 that is provided with petrolift P, in addition, in the fuel flow path 61 of the right-hand member 60D that is opened on main body B, insert the inflow path flange 52A that pressure regulator R is set, in addition, in the fuel flow path 61 of the bottom 60A that is opened on main body B, insert the inflow joint 32 that is provided with Fuelinjection nozzle J.

According to top description, the vertical axis line W-W of the vertical axis line X-X of the fuel drain passageway 5 of petrolift P and the fuel of pressure regulator R inflow path 52 is arranged on the same straight line by the fuel flow path 61 of substantially horizontal.

Also have, the vertical axis line Y-Y of the fuel inflow path 32D of Fuelinjection nozzle J is arranged in a crossed manner with the vertical axis line X-X of the fuel drain passageway 5 of petrolift P according to the fuel flow path 61 by above-below direction.

If adopt above-mentioned scheme, then the fuel of discharging from petrolift P enters in the fuel chambers 56 of pressure regulator R easily immediately, can carry out the adjustment of the fuel pressure in the fuel flow path 61 well.Can be under the situation after the startup of motor particularly etc., quicken not have the pressure adjustment actuation time in the state of sufficient bunkering in fuel chambers 56 in.

On the other hand, when Fuelinjection nozzle J drives, from the fuel of Fuelinjection nozzle J flow into path 32D towards in the fuel flow path 61 of fluctuation pressure at above-below direction of upstream side towards on direction (upstream side) and acting on, conflict in this fluctuation pressure fuel flow path 61 in the horizontal direction, above-mentioned fluctuation pressure decay.

According to foregoing description, above-mentioned fluctuation pressure is difficult to act on petrolift P and pressure regulator R, to the discharge effect of petrolift, the pressure corrective action of pressure regulator R is seldom influenced.

Below by Fig. 6, another embodiment is described.

Only the scheme different with Fig. 1 is described.

85 expression low voltage side fuel filters, it is by following as formation.

86 expression filter housings, this filter housing are that lower opening has fuel inflow path 86A on sidewall, are the cup-shaped of being with the end, and 87 expressions are with the filter housings of the lower opening sealing of above-mentioned filter housing.

Be provided with the 87A of tube portion that extends up and down at the central part of above-mentioned filter housings, offer stream 87B at the 87A of this from the top towards the bottom.

Have again, below be formed with internal thread 87C on the periphery of the 87A of tube portion that extends.

In addition, the outer peripheral portion of filter housings 87 is riveted on inside towards the lip part of the periphery of filter housing 86, and thus, filter housings 87 and filter housing 86 sealing ground form.

The tubular filter of 88 expressions is flat top board 88A and the base plate 88B filter paper 88C by in the form of a ring and is connected, and (in the filter paper 88C) insertion is provided with the 87A of tube portion of extension above filter housings 87 in filter 88.In addition, this filter 88 as following mode are fixed, and this mode is: top board 88A presses on the filter housing 87 by the spring 89 between the bottom that is arranged at itself and filter housing 86 with minification.

In addition, the top of outstanding inflow joint 15 has lip part 15A above petrolift P, is opened in the fuel that flows in the joint 15 and flows into path 16 is opened on lip part 15A by internal thread 15B top end.

Also have, above-mentioned low voltage side fuel filter screws togather with the internal thread 15B that flows into joint 15 by the internal thread 87C with the 87A of tube portion, low voltage side fuel filter 85 is screwed togather on the lip part 15A of the inflow joint 15 that is fixed in petrolift P.

Have, the fuel of low voltage side fuel filter 85 flows into path 86A and is connected with fuel tank T by fuel intake channel 80 again.

So, if petrolift P drives, then the fuel in this fuel tank T flows into path 86A and flow in the filter housing 86 by fuel intake channel 80, fuel, this fuel can be removed foreign matter by the filter paper 88C of filter 88, then, by the stream 87B that is opened in the filter 88 fuel that the fuel that cleans feeds to petrolift P is flowed into path 16.

If employing the above embodiments, then low voltage side fuel filter 85 is arranged on the petrolift P with being integral, fuel intake channel 80 can flow into the fuel of low voltage side fuel filter 85 path 86A and be connected with fuel tank T, can simplify the connection operation that fuel intake channel 80 can be simplified fuel pipe.

In addition, pull down main body B, thus, low voltage side fuel filter 85 outwards can be taken off from suction tude 70 once, like this, can improve the particularly upkeep operation of above-mentioned filter from suction tude 70.

In addition, by low voltage side fuel filter 85 directly is arranged on the petrolift P, have by the effect of the fuel in the low voltage side fuel filter 85 with petrolift P cooling.

Below by Fig. 7 an also embodiment of the present invention is described.

In addition, the parts identical with Fig. 1 adopt prosign, and it describes omission.

In main body B, connect the fuel flow path 91 that offers above-below direction from top 90A towards bottom 90B, the below of the fixed iron core 3 of petrolift P is inserted in the fuel flow path 91 that is opened on top 90A, fixing upright being located on the 90A of top of above-mentioned petrolift P.In addition, the top of the intake channel 32C of Fuelinjection nozzle J is inserted in the fuel flow path 91 that is opened on bottom 90B, fixing upright being located on the bottom 90B of main body B of this Fuelinjection nozzle J.

To remove from the foreign matter the fuel that the fuel drain passageway 5 of petrolift P is discharged by high pressure side fuel filter 84, then, the fuel that is supplied to Fuelinjection nozzle J by fuel flow path 91 flows in the path 32D.

92A represents to form the fuel chambers recess of the fuel chambers 92 of pressure regulator R, and it is arranged with the right-hand member 90C in main body B.In addition, towards the sending into of the fuel chambers 92 of pressure regulator R, flow into path 92B and 92 interior connections of fuel chambers for fuel from the fuel of the right substantially horizontal of fuel flow path 91 branches of above-below direction.

Also have, right-hand opening portion of above-mentioned fuel chambers recess seals by barrier film 55, spring housing's main body 54, by the left surface and the fuel chambers recess 92A formation fuel chambers 92 of barrier film 55, by right flank and spring housing's main body 54 formation spring housing 57 of barrier film 55.

Have, return fuel passage 51 and be opened among the main body B, the one end opening is in fuel chambers 92, and the other end is towards the atmospheric side opening.

In addition, left end 90D at main body B, be concaved with fuel chambers recess 93A, this fuel chambers recess 93A forms the fuel chambers 93 of ripple damper D, the opening portion of the left end 90D of fuel chambers recess 93A is by barrier film 94 and the main body 95A of spring housing sealing, right flank and fuel chambers recess 93A by barrier film 94 form fuel chambers 93, by the left surface and the main body 95A of the spring housing formation spring housing 95 of barrier film 94.

In above-mentioned spring housing 95, as barrier film 96 is set,,, barrier film 94 is put towards fuel chambers 93 lateral deviations by the elastic force of barrier film 96 according to this point with minification.

In addition, the fuel chambers 93 of ripple damper D is connected with the fuel flow path 91 of above-below direction by the fuel inflow path 93B of left substantially horizontal.

Fix according to following at main body B with above-mentioned petrolift P, Fuelinjection nozzle J, pressure regulator R, ripple damper D, should be arranged on the top end 73A of main body support part 73 of suction tude 70 for: the installation arm 60B of main body B, and will start bolt 74 inserts in the mounting hole 64, then, by nut 79 this bolt and suction tude 70 are screwed togather.

According to top description, the front end of yoke 37 with valve body 38 of Fuelinjection nozzle J is inserted in the injection valve supporting hole 72 of suction tude 70, and Fuelinjection nozzle J supports by suction tude 70 and main body B.On the other hand, the fuel of petrolift P flows into path 16 and is connected with fuel tank T by fuel intake channel 80, and the fuel passage 51 of returning of pressure regulator R is connected with fuel tank T by returning fuel pipe 83.

According to fuel supplying device as described above, then during the running when startup with motor, fuel in the fuel tank T flows into path 16 and is drawn in the petrolift P by fuel intake channel 80, fuel, the fuel that pressure rises in the pump chamber 18 of petrolift P is discharged in the fuel passage 91 of main body B from fuel drain passageway 5.

Also have, by high pressure side fuel filter 84, the foreign matter that is comprised in the fuel with this pressure rising is removed, the part of the fuel of cleaning feeds in the fuel chambers 92 of pressure regulator R by the fuel inflow path 92B of the fuel flow path 91 of above-below direction, right substantially horizontal, riddles fuel chambers 92.In addition, another part of the fuel of cleaning flows into the fuel chambers 93 that path 93B feeds to ripple damper D by the fuel of the fuel flow path 91 of above-below direction, left substantially horizontal, is full of fuel chambers 93.

According to top description, identical with aforesaid embodiment, the fuel of inciting somebody to action fuel pressure adjustment according to the rules by the pressure corrective action of pressure regulator R feeds in the fuel inflow path 32D of Fuelinjection nozzle J, residual fuel in the fuel chambers 92 flow back in the fuel tank T by returning fuel passage 51, returning fuel pipe 83 on the other hand.

Have again, when Fuelinjection nozzle J moves, the 39A of cone valve portion of needle-valve 39 realizes the switching of spray-hole 38A, thus, upstream side towards fuel stream, produce combustion and press pulsation, therefore should combustion press pulsation to flow into path 93B, arrive the fuel chambers 93 of ripple damper D by the fuel of the fuel flow path 91 of above-below direction, left substantially horizontal.

In addition, press pulsation, can pressure pulsation be reduced to than the low degree zone, therefore can suppress pulsation transmission, can reduce noise towards fuel pipe by the damping of barrier film 94 and damping spring 96 for the combustion in the fuel chambers 93.

As mentioned above, if adopt the fuel supplying device of present embodiment, petrolift P, Fuelinjection nozzle J, pressure regulator R, ripple damper D are installed on main body B, then main body B is installed on the suction tude 70, thus, can once these mechanisms be installed on the suction tude 70, and can be by fuel intake channel 80, return the connection of fuel pipe 83, constitute fuel pipe.

So, install extremely simply, and the connection between each mechanism can be easily, carry out on main body B compactly, and this is for particularly as motorcycle, and the limited occasion of installing space is effective.

In addition, even owing to when the maintenance of said mechanism, still by main body B is pulled down from suction tude 70, thus, take off this mechanism, so can improve maintenance operation greatly from vehicle.

Also have, as present embodiment, if the firing chamber main body of fuel chambers 92 that will form pressure regulator R then needn't be equipped with fuel chamber main body specially, and need not the firing chamber main body is installed on the main body B as forming the fuel chambers recess 92A of one with main body B and being provided with.In addition, need not to adopt fuel pipe that fuel chamber main body is connected with main body.

Have, the firing chamber main body of the fuel chambers 93 by will forming ripple damper D is provided with as the fuel chambers recess 93A that forms one with main body B, realizes the identical effect of fuel chambers recess 92A with above-mentioned pressure regulator R thus again.

In addition, from the aspect that compactly fuel supplying device integral body is concentrated in together, be preferably fuel chambers 92,93 and be integrally formed with main body B.

Fig. 8 represents another embodiment of fuel supplying device of the present invention.

The structure division identical with Fig. 7 adopts prosign, omits the description to it.

The setting of each mechanism is different with Fig. 7, and this setting has characteristics.

The left end 90D of main body B is provided with petrolift P, and the right-hand member 90C of main body B is provided with pressure regulator R, and 90A is provided with ripple damper D on the top of main body B, and the bottom 90B of main body B is provided with Fuelinjection nozzle J.

On main body B, offer the fuel flow path 91 of substantially horizontal from left end 90D towards right-hand member 90A, from the bottom 90B of main body B towards the fuel flow path 91 of substantially horizontal offer across upward to fuel flow path 91.

In the present embodiment, the fuel flow path 91 of substantially horizontal with upward to fuel flow path 91 vertical.

In addition, the fuel flow path 91 by substantially horizontal flows into path 92B towards the fuel of the fuel chambers 92 of pressure regulator R and extends on same straight line, and the bottom of the fixed iron core 3 of petrolift P (right-hand member among Fig. 8) inserts and be opened in the fuel flow path 91 of left end 90D.

According to top description, the vertical axis line W-W of the vertical axis line X-X of the fuel drain passageway of petrolift P and the fuel of pressure regulator R inflow path 92B is arranged on the same straight line by the fuel flow path 91 of substantially horizontal.

Then, by from the bottom 90B of main body B towards upward to fuel flow path 91 flow into path 93B along same straight-line extension towards the fuel of ripple damper D, the top of the intake channel 32C of Fuelinjection nozzle J is inserted and is opened in the fuel flow path 91 of bottom 90B.

According to top description, the vertical axis line S-S that the vertical axis line Y-Y of the fuel of Fuelinjection nozzle J inflow path 32D and the fuel of ripple damper D flow into path 93B is arranged on the same straight line by fuel flow path 91.

According to top description, the fuel that the pressure of discharging from the fuel drain passageway 5 of petrolift P rises flows into path 92B and acts in the fuel chambers 92 of pressure regulator R by being arranged at fuel on the same straight line easily, can improve the pressure of the fuel pressure behind the engine start particularly and adjust reactive.

On the other hand, the combustion that Fuelinjection nozzle J produced when starting presses pulsation to flow in the fuel chambers 93 that path 93B is sent to ripple damper D apace by fuel, then can further improve the damping that pulsation is pressed in combustion thus.

Also have, Fig. 9 represents the another embodiment of fuel supplying device of the present invention.

In this example, what petrolift P, Fuelinjection nozzle J, ripple damper, pressure regulator R be set on the main body B low voltage side fuel filter 85 shown in Figure 6 is installed in fuel supplying device shown in Figure 7.For the structure identical, adopt prosign with above-mentioned composition.

If according to present embodiment, because low voltage side fuel filter 85 is integral and is arranged on the petrolift P, fuel intake channel 80 can flow into the fuel of low voltage side fuel filter 85 path 86A and be connected with fuel tank T, can simplify the connection operation of fuel intake channel 80.

In addition,, low voltage side fuel filter 85 can be taken off, can improve maintenance operation by pulling down main body B from suction tude 70.

In addition because low voltage side fuel filter 85 directly is arranged on the petrolift P, can make petrolift by fuel effectively to cooling off.

Also have, if in Fig. 7, embodiment shown in Figure 9, form main body B by the synthetic resin material, in addition, the joiner 21 of petrolift P and the joiner 41 of Fuelinjection nozzle J are provided with to same peripheral direction, then the identical effect of previous embodiment of realization and Fig. 1, Fig. 4 etc.

Have, main body B is installed on the suction tude, still in the present embodiment again, this main body B also can be installed on the throttle valve body, the mechanism that main body B is installed on the suction tude etc. is not limited to embodiment, and in addition, petrolift comprises electromagnetic coil is realized pumping action by electromagnetic force pump portion type is set.

As mentioned above, adopt the first feature scheme of the present invention, wherein in fuel injection system, by petrolift the pressure of the fuel in the fuel tank is risen, the fuel that this pressure is risen feeds to motor by fuel injection valves inject, on main body, be integral petrolift, Fuelinjection nozzle, pressure regulator are installed, and the fuel drain passageway of petrolift, the fuel of Fuelinjection nozzle are flowed into the fuel inflow path connection of path, pressure regulator by the fuel flow path that is opened in the main body;

Main body with above-mentioned petrolift, Fuelinjection nozzle and pressure regulator is installed on the suction tude, the spray-hole of the Fuelinjection nozzle of supporting by main body and suction tude is towards the suction tude inner opening, thus, can be by main body be installed on the suction tude, be installed on petrolift, Fuelinjection nozzle and pressure regulator on the vehicle once, can improve the assembling performance of vehicle, particularly the occasion that is restricted for installing space is effective.

In addition, owing to the pipe for fuel, can connect petrolift and fuel tank by the fuel intake channel, and return fuel passage and fuel tank by returning the fuel pipe connection, so can improve the degrees of freedom of the design of fuel pipe, in addition, it is easy to connect operation.

In addition, Fuelinjection nozzle adopts the Fuelinjection nozzle of electromagnetic type, can keep the fuel of existing Fuelinjection nozzle controlled same as before.

Also have,,, particularly be preferably the occasion that is used for motorcycle that fuel supply system externally exposes etc. so can further improve withstand voltage reliability because high-pressure fuel pipe only is formed at body interior.

Have again, because when engine running, the electromagnetic coil of petrolift heating itself, but stoped transmission of heat towards Fuelinjection nozzle by main body, so can suppress the generation of the steam in the Fuelinjection nozzle, thus, supply with the fuel that sprays by Fuelinjection nozzle serially and stably.

In addition, because petrolift is arranged at the position of leaving with suction tude according to the size that is equivalent to the thickness of main body,, the temperature of the petrolift that the heat of this suction tude causes restrained so rising, can make the discharging performance of petrolift stable, can reduce the insulating properties of the electromagnetic coil that constitutes petrolift.

In addition, because petrolift, pressure regulator and Fuelinjection nozzle all are held on the main body, so when even masterpiece is used in above-mentioned each mechanism outside, still can not damage other mechanism indirectly.

Also have, because petrolift, pressure regulator and Fuelinjection nozzle are installed on the common assembly, so can be simplified to fix supporting mechanism.

Have again, according to the second feature scheme of the present invention, the vertical axis line of the vertical axis line of the vertical axis line of the fuel drain passageway of above-mentioned petrolift, the fuel of Fuelinjection nozzle inflow path, the fuel flow path of main body B is arranged on the same straight line, therefore improve the reactivity of fuel supply from improving from petrolift towards the straight movement of the fuel of Fuelinjection nozzle, the aspect that can adopt lower fuel pressure (about 100kpa) thus is preferred.

In addition, according to the 3rd feature scheme of the present invention, because the vertical axis line of the fuel drain passageway of above-mentioned petrolift, the fuel of pressure regulator flow into the vertical axis line of path and are arranged on the same straight line by fuel flow path, the vertical axis line of the vertical axis line of the fuel inflow path of Fuelinjection nozzle and the fuel drain passageway of petrolift is by fuel flow path and setting across, so can carry out the fuel pressure adjustment in the fuel flow path well, the pressure that can quicken behind the engine start is particularly adjusted actuation time.

In addition, owing to towards the fluctuation pressure fuel flow path in the horizontal direction that upstream side produces, conflicting, so can make the fluctuation pressure decay effectively from Fuelinjection nozzle.

Also have, according to the 4th feature scheme of the present invention, because the fuel chambers recess of above-mentioned pressure regulator is integrally formed on main body, so can make fuel chamber main body and main body shared, the reduction of realization number of components need not to connect operation, can reduce manufacture cost.

According to the 5th feature scheme of the present invention, because the high pressure side fuel filter is set in the fuel flow path of aforementioned body, the fuel that the fuel of Fuelinjection nozzle flows into path, pressure regulator flows into the fuel flow path inner opening of path in the downstream side of high pressure side fuel filter, so need not to be connected with the high pressure side fuel filter by pipe.Can improve maintenance.Can realize obtaining the effect of sufficient filter area.

Have again, according to the 6th feature scheme of the present invention, wherein in fuel injection system, by petrolift the fuel in the fuel tank is risen, the fuel that pressure is risen feeds to motor by fuel injection valves inject, on main body, be integral petrolift, combustion injection valve, pressure regulator and ripple damper are installed, and the fuel drain passageway of petrolift, the fuel of Fuelinjection nozzle are flowed into the fuel inflow path connection of the fuel inflow path of path, pressure regulator, ripple damper by the fuel flow path that is opened in the main body;

Main body with above-mentioned petrolift, Fuelinjection nozzle, pressure regulator and ripple damper is installed on the suction tude, the spray-hole of the Fuelinjection nozzle of supporting by main body and suction tude is towards the suction tude inner opening, thus, can be by main body be installed on the suction tude, be installed on petrolift, Fuelinjection nozzle and pressure regulator on the equipment once, in addition, can flow into path and the fuel pipe that connects and composes that returns fuel pipe by fuel, particularly effective for the occasion that installing space is restricted.

In addition, according to the 7th feature scheme of the present invention, because the fuel chambers recess of above-mentioned pressure regulator and the fuel chambers recess of ripple damper are integrally formed on main body, so needn't be equipped with corresponding fuel chamber main body, and also need not to connect their pipe, in addition, whole device can be concentrated compactly.

Also have, according to the 8th feature scheme of the present invention, the vertical axis line of the vertical axis line of the fuel inflow path of above-mentioned Fuelinjection nozzle, the fuel inflow path of ripple damper is arranged on the same straight line by the fuel flow path of main body, and the vertical axis line that the vertical axis line of the fuel drain passageway of petrolift and the fuel of pressure regulator flow into path flows into channel setting on same straight line by fuel, adjust reactively so can improve the pressure of the fuel pressure behind the engine start particularly, can further improve the damping of pressure regulator.

Have again,,,, can further suppress the generation of the steam of petrolift and Fuelinjection nozzle effectively so can further improve the effect of heat insulation of aforementioned body owing to, form aforementioned body by the synthetic resin material according to the 9th feature scheme of the present invention.

In addition, according to the tenth feature scheme of the present invention, because the joiner that the electromagnetic coil in the above-mentioned petrolift connects, with the joiner that is connected with the electromagnetic coil that is arranged at Fuelinjection nozzle inside towards same peripheral direction setting, so can improve the connectivity of the matrix link that is connected with external power supply.

In addition, according to the 11 feature scheme of the present invention, owing to the low voltage side fuel filter is installed in the fuel inflow path of above-mentioned petrolift with being integral, so can flowing into the fuel of low voltage side fuel filter in path, the fuel intake channel is connected with fuel tank, can further simplify fuel pipe, and, can once whole mechanisms be arranged on the suction tude by main body is installed on the suction tude.

Claims (11)

1. a fuel supplying device wherein in fuel injection system, rises the pressure of the fuel in the fuel tank by petrolift, and the fuel that this pressure rises is supplied with to engine spray by Fuelinjection nozzle, it is characterized in that,

On main body (B), be integral petrolift (P), Fuelinjection nozzle (J), pressure regulator (R) are installed, and the fuel drain passageway (5) of petrolift (P), the fuel inflow path (32D) of Fuelinjection nozzle (J) are connected with the fuel inflow path (52) of pressure regulator (R) by the fuel flow path (61) that is opened in the main body (B);

Main body (B) with above-mentioned petrolift (P), Fuelinjection nozzle (J) and pressure regulator (R) is installed on the suction tude (70), and the spray-hole (38A) of the Fuelinjection nozzle (J) by main body (B) and suction tude (70) support is towards suction tude (70) inner opening.

2. fuel supplying device according to claim 1, it is characterized in that, the vertical axis line (X-X) of the fuel drain passageway (5) of above-mentioned petrolift, the fuel of Fuelinjection nozzle (J) flows into the vertical axis line (Y-Y) of path (32D), is arranged on the same straight line with the vertical axis line (Z-Z) of the fuel flow path (61) of main body B.

3. fuel supplying device according to claim 1, it is characterized in that the vertical axis line (W-W) that the vertical axis line (X-X) of the fuel drain passageway (5) of above-mentioned petrolift, the fuel of pressure regulator R flow into path (52) is arranged on the same straight line by fuel flow path (61) and the vertical axis line (Y-Y) of the fuel inflow path (32) of Fuelinjection nozzle (J) is arranged to intersect by fuel flow path (61) with the vertical axis line (X-X) of the fuel outflow pathway (5) of petrolift (P).

4. fuel supplying device according to claim 1 is characterized in that, the fuel chambers recess (56A) of above-mentioned pressure regulator is integrally formed on main body (B).

5. fuel supplying device according to claim 1, it is characterized in that, high pressure side fuel filter (84) is set in the fuel flow path of aforementioned body, in the fuel flow path (61) in the downstream side of high pressure side fuel filter (84), the fuel that opening has the fuel of Fuelinjection nozzle (J) to flow into path (32D), pressure regulator (R) flows into path (52).

6. fuel supplying device, wherein in fuel injection system, by petrolift the pressure of the fuel in the fuel tank is risen, the fuel that this pressure rises is supplied with to engine spray by Fuelinjection nozzle, it is characterized in that, on main body (B), be integral petrolift (P) is installed, Fuelinjection nozzle (J), pressure regulator (R), with ripple damper (D), and by being opened in the fuel flow path (91) in the main body (B), with the fuel drain passageway (5) of petrolift (P), the fuel of Fuelinjection nozzle (J) flows into path (32B), the fuel of pressure regulator (R) flows into path (92B), flows into path (93B) with the fuel of ripple damper and is connected;

Has above-mentioned petrolift (P), Fuelinjection nozzle (J), the main body (B) of pressure regulator (R) and ripple damper (D) is installed on the suction tude (70), and the spray-hole (38A) of the Fuelinjection nozzle (J) by main body (B) and suction tude (70) support is towards suction tude (70) inner opening.

7. fuel supplying device according to claim 6 is characterized in that, the fuel chambers recess (92A) of above-mentioned pressure regulator is integrally formed on main body (B) with the fuel chambers recess (93A) of ripple damper (D).

8. fuel supplying device according to claim 6, it is characterized in that, the vertical axis line (S-S) of the vertical axis line (Y-Y) of the fuel inflow path (32D) of above-mentioned Fuelinjection nozzle, the fuel inflow path (93B) of ripple damper (D) is arranged on the same straight line by the fuel inflow path (91) of main body (B), and the vertical axis line (W-W) of the fuel of the vertical axis line (X-X) of the fuel drain passageway (5) of petrolift (P) and pressure regulator (R) inflow path (92B) is arranged on the same straight line by fuel flow path (91).

9. according to claim 1 or 6 described fuel supplying devices, it is characterized in that, form aforementioned body (B) by the synthetic resin material.

10. according to claim 1 or 6 described fuel supplying devices, it is characterized in that the joiner (41) that the joiner (21) that will be connected with the electromagnetic coil in being arranged at above-mentioned petrolift is connected with the electromagnetic coil inner with being arranged at Fuelinjection nozzle (J) is towards same peripheral direction setting.

11., it is characterized in that the fuel that low voltage side fuel filter (85) is installed on above-mentioned petrolift with being integral flows in the path (16) according to claim 1 or 6 described fuel supplying devices.

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