CN1573082A - Fuel supply apparatus - Google Patents

Abstract

In the fuel supply device, a fuel pump P and a fuel injection valve J are integrally mounted in a base body B. The fuel discharge passage 5 of the fuel pump P and the fuel inflow passage 32D of the fuel injection valve J are connected to each other by a fuel flow passage 51 drilled in the base body B. The base body B equipped with the fuel pump P and the fuel injection valve J is mounted in an intake pipe 60. The fuel injection valve J is supported by the base body B and the intake pipe 60 so as to open the injection hole 38A of the fuel injection valve J toward the inside of the intake pipe 60.

Description

Fuel supplying device

Technical field

The present invention relates to a kind of fuel that will be stored in the fuel tank by petrolift boosts, the fuel that this is boosted sprays the fuel injection system of supplying with, the particularly fuel supplying device that wherein is made of petrolift and Fuelinjection nozzle by Fuelinjection nozzle to internal-combustion engine then.

Background technique

The spy opens and discloses a kind of existing fuel supplying device in the 2001-221137 communique.Wherein particularly shown following content among Fig. 8 of aforementioned communique.Promptly, plunger pump and jet blower are in conjunction with being configured to one, by riveting the lining fixed configurations on the pump main body lower end that constitutes plunger pump, be formed on the external screw thread of said sleeve below periphery and the female thread thread engagement in the interior week that is formed on the cylindrical shell top that constitutes jet blower, thereby jet blower and plunger pump are combined into one.

According to existing fuel supplying device, there is following shortcoming in conjunction with the lower end that is configured in plunger pump because of the upper end of jet blower is direct.

At first, when energising drive plunger pump, owing to electromagnetic coil oneself heating that is configured in the plunger pump, this heat heats the cylindrical shell that constitutes jet blower from the lining that constitutes plunger pump, and the fuel temperature that flows in the jet blower is risen.

According to above-mentioned, produce steam the fuel that in jet blower, flows down, this steam becomes intermittently the fuel quantity supply inhomogeneous or fuel of spraying from jet blower in suction tude, hinder the supply of fuel smoothly continuously.

This has not been a phenomenon when idling of IC engine running, low-speed running.

The second, under the situation when internal-combustion engine dallies running, high load low-speed running for a long time etc., the phenomenon that exists intake manifold temperature significantly to rise.

On the one hand, because the front end of jet blower usually inserts in the suction tude, with the integrally formed plunger pump of nozzle contiguous suction tude is set also thus.

According to above-mentioned, the temperature that suction tude rises acts on the plunger pump easily, must improve the insulating properties of the electromagnetic coil of self-heating.

For example have from maximum safety temperature be 90 ℃ Y-insulation to the needs that the higher E insulation-like type of maximum safety temperature (120 ℃), F insulation-like type (155 ℃) improve, the situation of bringing the manufacture cost of electromagnetic coil to rise thus can not be satisfactory.

And then because the heat of suction tude is directly delivered on the plunger pump by jet blower, plunger pump self temperature raises, and is easy to generate steam thus in plunger pump.

Steam compressed effect because of aforementioned steam causes causes the fluctuation of the discharge capacity of pump easily, keeps stable pump performance difficult.

The 3rd, when either party applies external force in plunger pump and jet blower, owing to cause another distortion, for example when plunger pump applies external force, this power makes the barrel distortion of jet blower by the lining of plunger pump, probably can hinder the smooth and easy action that keeps poppet body that micro-gap axially moves etc. in cylindrical shell.

Particularly directly expose in the equipment that externally uses and preferably do not use this fuel supplying device as suction tude such as cart, machine outside, general-purpose machines.

The 4th, need to consider use fuel supplying device which kind of fixing means will be made of plunger pump, jet blower to fix with respect to the fixing part of suction tude.

The 5th, plunger pump is connected with cylinder screw by lining with jet blower, and the lining of plunger pump, the cylindrical shell of nozzle be for being fit to internal-combustion engine, need cooperate it and change when the emitted dose specification of the pump size of change plunger pump and nozzle.When a side changed, the opposing party also needed to change simultaneously thus.For example add the electric wire of electromagnetic coil, when increasing the diameter of lining, need the internal diameter of the cylindrical shell of increase nozzle for the pump capacity that makes plunger pump becomes to heighten.

Summary of the invention

In view of the above problems, main purpose of the present invention for provide a kind of in the use of fuel injection systems such as cart, machine outside, universal machine optimal fuel supplying device, when wherein providing a kind of heat that produces because of the electromagnetic coil that is arranged in the petrolift in containment to make the fuel heating of flowing in the jet blower especially, the rising of petrolift temperature when being contained in the intake manifold temperature rising, and the above-mentioned fuel supplying device that correct fuel can be supplied with to internal-combustion engine continuously and stably.A kind of insulating properties of the electromagnetic coil that does not need to increase petrolift and cheap fuel supplying device are provided simultaneously.

Fuel supplying device of the present invention to achieve these goals, a kind of fuel supplying device of the present invention, fuel in fuel pot boosts in petrolift, and the fuel that boosts is supplied with to the internal-combustion engine injection by Fuelinjection nozzle, it is characterized in that, when being installed in Fuelinjection nozzle and petrolift on the base body integratedly, the fuel that the fuel of petrolift is discharged road and Fuelinjection nozzle flows into the road and links to each other by the fuel flow path that is located in this base body.

The base body that will have aforementioned Fuelinjection nozzle and petrolift is installed on the suction tude, and the spray orifice of the Fuelinjection nozzle of being supported by base body and suction tude is to the suction tude inner opening.

Second feature of the present invention, in accordance with a first feature of the invention, the longitudinal axis on the fuel of petrolift discharge road, the fuel of Fuelinjection nozzle flow into the longitudinal axis on road, the longitudinal axis of fuel flow path is arranged on same the straight line.

The 3rd feature of the present invention, in accordance with a first feature of the invention, the fuel of petrolift is discharged the longitudinal axis on road, the fuel of Fuelinjection nozzle flows into the longitudinal axis on road by the fuel flow path cross-over configuration.

The 4th feature of the present invention, in accordance with a first feature of the invention, coupling piece that links to each other with electromagnetic coil in being configured in aforementioned petrolift and the coupling piece that links to each other with electromagnetic coil in being configured in Fuelinjection nozzle are arranged on same peripheral direction.

The 5th feature of the present invention in accordance with a first feature of the invention, is arranged on the high pressure side fuel filter in the fuel flow path in the aforementioned base body.

The 6th feature of the present invention is arranged again, and in accordance with a first feature of the invention, the fuel that the low voltage side fuel filter is installed in integratedly aforementioned petrolift flows in the road.

The 7th feature of the present invention in accordance with a first feature of the invention, forms base body by synthetic resin.

In accordance with a first feature of the invention, petrolift and Fuelinjection nozzle are installed on the base body integratedly, and simultaneously, the fuel inflow road that the fuel of petrolift is discharged road and Fuelinjection nozzle links to each other by the fuel flow path that is located in this base body.

The base body that will comprise aforementioned Fuelinjection nozzle and petrolift is installed on the suction tude, disposes towards the suction tude inner opening at the spray orifice of the front opening of Fuelinjection nozzle.

When petrolift drives, during electromagnetic coil self-heating in being arranged on petrolift, this heat is reduced by base body, can contain transmission of heat to Fuelinjection nozzle, thereby can contain and the rising of the temperature of the fuel that flows in the Fuelinjection nozzle can reduce the generation of Fuelinjection nozzle inner vapor significantly.

And petrolift can contain that the heat by suction tude causes that the petrolift temperature raises because the volume of corresponding base body is configured on the position away from suction tude, thereby, there is no need to improve the insulating properties that is configured in the electromagnetic coil in the petrolift.

Second feature according to the present invention, because the longitudinal axis on the fuel inflow road of the longitudinal axis on the fuel of petrolift discharge road, Fuelinjection nozzle and the longitudinal axis of base body fuel flow path are configured on same the straight line, so can improve from the straight movement of petrolift to the fuel of Fuelinjection nozzle, the fuel responsive in the time of particularly can improving engine starting.

The 3rd feature according to the present invention is if the fuel of aforementioned petrolift is discharged the longitudinal axis on road and the fuel of Fuelinjection nozzle flows into the longitudinal axis on road by base body fuel flow path cross-over configuration.

If adopt this structure, when the Fuelinjection nozzle start, flow into fluctuation pressure that the road direction upstream side produces with the fuel flow path collision and decay from the fuel of combustion Fuelinjection nozzle.In addition when the petrolift start, discharge fluctuation pressure that the road direction downstream side produces with the fuel flow path collision and decay from the fuel of petrolift.

The mutual fluctuation pressure that produces influences little to the opposing party, can pulse little stable fuel supply in suction tude from the fuel injection valve thus.

In addition, the 4th feature according to the present invention, since from petrolift to the coupling piece of outside be arranged on same peripheral direction from the coupling piece of Fuelinjection nozzle to the outside, can improve the electrical connection operation of the measurement type connector that links to each other with external power supply with aforementioned coupling piece.

The 5th feature according to the present invention because the high pressure side fuel filter is arranged in the fuel flow path of base body, can improve the installation of high pressure side fuel filter.

The 6th feature according to the present invention because the low voltage side fuel filter is arranged in the fuel flow path of petrolift, can improve the installation of low voltage side fuel filter.

In addition, the 7th feature according to the present invention, base body is formed by synthetic resin, compares the low material of thermal conductivity owing to use with metallic material, can contain the heat that the electromagnetic coil by petrolift produces effectively and causes that the fuel-injection pump temperature raises.

According to aforementioned fuel supplying device of the present invention, fuel in the fuel pot boosts in petrolift, fuel after will boosting by Fuelinjection nozzle in the fuel supplying device that internal-combustion engine spray to be supplied with, Fuelinjection nozzle J and petrolift P are installed on the base body B integratedly, simultaneously, the fuel inflow road of the fuel of petrolift discharge road and Fuelinjection nozzle links to each other by the fuel flow path that is located in the base body.

The base body that will comprise aforementioned Fuelinjection nozzle and petrolift is installed on the suction tude, because the spray orifice of the Fuelinjection nozzle of being supported by base body and suction tude is to the suction tude inner opening, if will be installed on the vehicle, can improve the assembling performance of the vehicle that installing spaces such as cart extremely limit by the fuel supply system parts that petrolift, Fuelinjection nozzle, base body are formed.

Because fuel pipe also can link to each other with fuel pot with petrolift, has improved the design freedom of fuel distribution tube, and can improve the connectivity of pipe arrangement.

From the fuel of petrolift after Fuelinjection nozzle boosts owing to remain in the fuel flow path that is formed in the base body, need not to consider especially the resistance to pressure of fuel distribution tube, be directly exposed at fuel distribution tube and adopt fuel supplying device of the present invention effective especially in outside cart, machine outside, the universal machine etc.

When petrolift drives, electromagnetic coil oneself heating in the petrolift and the heat of generation is reduced by base body, owing to can contain heating to Fuelinjection nozzle, thereby can contain and produce steam in the fuel that flows in the Fuelinjection nozzle, from Fuelinjection nozzle correctly steady and continuous to the internal-combustion engine fueling.

And, because the distance between that petrolift can dispose and the suction tude is equivalent to the thickness of base body, can contain that the heat by suction tude causes that the petrolift temperature raises, and when guaranteeing that the petrolift discharge capacity is stable, can adopt the low cheap electromagnetic coil of insulating properties.

When to when the petrolift of the outstanding configuration of base body, Fuelinjection nozzle one applies external force, even the equipment support on the base body partly is out of shape, miscellaneous equipment supports that part is indeformable, preferably this equipment is applied in and directly exposes on the outside cart.

Because petrolift and Fuelinjection nozzle are installed in same assembly just on the base body, can be simplified to fix means.

If the longitudinal axis on the fuel of aforementioned petrolift discharge road, the fuel of Fuelinjection nozzle flow into the longitudinal axis on road, the longitudinal axis of fuel flow path is configured on same the straight line, can improve from the straight movement of petrolift to the fuel of Fuelinjection nozzle, responsiveness when particularly improving engine starting, when using electromagnetic plunge pump etc., obtain the lower effect of head pressure.

If the fuel of aforementioned petrolift is discharged the longitudinal axis on road, the fuel of Fuelinjection nozzle flows into the longitudinal axis cross-over configuration of the longitudinal axis on road by fuel flow path, decay with the fuel flow path collision respectively owing to the fluctuation pressure that causes by the petrolift pulsation and by the fluctuation pressure that the Fuelinjection nozzle action causes, the pump discharging performance of petrolift and the discharging performance of Fuelinjection nozzle are stable, can keep well.

If select be configured in aforementioned petrolift in the coupling piece that links to each other of electromagnetic coil, the coupling piece that links to each other with electromagnetic coil in being configured in aforementioned Fuelinjection nozzle be arranged on same peripheral direction, since can improve the measurement type connector that links to each other with external power supply and petrolift coupling piece the coupling piece that is connected measurement type connector that field-strip links to each other with external power supply and Fuelinjection nozzle be connected field-strip, advantageous applications is in the cart of installing space narrow limits.

If the high pressure side fuel filter is set in the fuel flow path in aforementioned base body, when not needing the pipe arrangement relative to connect with the high pressure side fuel filter, do not need housing around the high pressure side fuel filter yet, in addition, the selection of the filter area of high pressure side fuel filter is unrestricted, can set suitable filter area.

If the fuel of selecting the low voltage side fuel filter to be arranged on integratedly aforementioned petrolift flows in the road, because can only flowing into the road with the fuel of low voltage side fuel filter, fuel pipe links to each other with fuel pot, in the operation of simplifying fuel distribution tube significantly, by from the suction tude dismounting down, can carry out the maintenance of low voltage side fuel filter simultaneously with base body.In addition, can cool off petrolift, can contain the rising of petrolift temperature by the fuel in the low voltage side fuel filter.

In addition, form aforementioned base body if select by synthetic resin, the effect of being brought into play by the electromagnetic coil generation heat of petrolift because of base body can reduce, be difficult to the Fuelinjection nozzle transfer of heat, improving more in the discharge correctness and stability of Fuelinjection nozzle, during the suction tude heating, the effect base body that the heat of suction tude is brought into play reduces, be difficult to the petrolift transfer of heat, can improve the correctness and the stability of discharging more from petrolift.

Description of drawings

Fig. 1 is an embodiment's of an expression fuel supplying device of the present invention profile diagram.

Fig. 2 represents the fuel injection system of the state on the internal-combustion engine that fuel supplying device of the present invention is installed in.

Fig. 3 is the figure that schematically shows the position relation of secured core among Fig. 1, fuel flow path, inflow joint.

Fig. 4 is other embodiments' of a fuel supplying device of the present invention profile diagram.

Fig. 5 is the profile diagram of another embodiment's key position of fuel supplying device of the present invention.

Symbol description: 2 electromagnetic coils; 5 fuel are discharged the road; 16 fuel flow into the road; 21 coupling pieces; 31 electromagnetic coils; 32D fuel flows into the road; The 38A spray orifice; 41 coupling pieces; 51 fuel flow paths; 60 suction tude; 72 high pressure side fuel filters; 90 low voltage side fuel filters; The B base body; The J Fuelinjection nozzle; The P petrolift.

Embodiment

Below by Fig. 1 an embodiment of fuel supplying device of the present invention is described.This fuel supplying device is made of petrolift P, Fuelinjection nozzle J and base body B.

Petrolift P is made of following.

The 1st, by the cylindrical part 1A of tubular, the below flange portion 1B that extends to peripheral direction from cylindrical part 1A lower end, from the coil rack that cylindrical part 1A upper end is formed to the top flange portion 1C of peripheral direction extension, electromagnetic coil 2 is wrapped on the periphery of cylindrical part 1A.

The 3rd, the secured core of forming by magnetic material, insert in the below part in week in the cylindrical part 1A be configured in coil rack 1 its upper end, and the interior perimembranous electromagnetic combination that is arranged on the annular downside pole plate 4A (being formed by magnetic material) on below flange portion 1B following of coil rack 1 is configured on the periphery of end portion of secured core.

The aforementioned fixation iron core forms like this, and its upper end part is inserted in the cylindrical part 1A of coil rack 1 and extended, and end portion is to more downward direction is outstanding than downside pole plate 4A.Fuel is discharged road 5 and is arranged on the secured core from secured core 3 upper ends to the lower end with connecting.In addition, 6A represents to be configured in first seal ring on the end portion periphery of secured core 3, and 6B represents to be configured in second seal ring on the upper end part periphery of secured core 3, and the second seal ring 6B is crimped on and is configured in the no loading pipe 7 on week in the coil rack 1.

This no loading pipe 7 is provided with highlightedly to the top last direction of flange portion 1c than coil rack 1.

The 8th, be configured in no loading pipe 7, to be free to slide in week, simultaneously be configured in the movable plunger that the magnetic material of secured core 3 upper ends constitutes by subtend, on the outstanding upward guide cylinder 8A of the intermediate portion of movable plunger 8 inside, connect ground to the lower end and form plug flow road 8B from the upper end.Thereby, at the discharge valve seat 9 that forms above the plunger stream 8B below facing.Facing to this discharge valve seat 9 discharge check valve 11 is set.This discharge check valve 11 is pressed to discharge valve seat 9 by discharging spring 10A.

The 12nd, with the guide cylinder 8A maintenance micro-gap of movable plunger 8, the cylinder part of being supported slidably, be formed in this cylinder part 12 upper end open of the last direction cylinder part 12 of the pilot hole 12A of support guide cylinder 8A.Thereby the suction valve seat 13 that faces the below is configured in the top of guide pad 12A, and with these suction valve seat 13 subtends suction check valve 14 is set.This sucks check valve 14 by sucking spring 10B to sucking valve seat 13 pushings.

In addition, cylinder part 12 fixed configurations flow into joint 15 fixed configurations above being arranged on coil rack 1 on the annular upside pole plate 4B (being made by magnetic material) above the flange 1C in flowing into joint 15.And aforementioned inflow joint 15 comprises also that when having the recess of accommodating no loading pipe 7 upper sections the fuel of opening upward flows into road 16, and the below that fuel flows into road 16 links to each other with pilot hole 12A stream on being located in cylinder part 12 by sucking valve seat 13.

Return to put off until some time later bright movable plunger 8, guide cylinder 8A is supported in the pilot hole 12A of cylinder part 12 with keeping the micro-gap free sliding, and state of equilibrium ground on certain position is supported by lower spring 17A and upper spring 17B.

The lower end of lower spring 17A is connected on the upper end of secured core 3, and its upper end is connected on the following 8C of movable plunger 8 intermediate portions.

In addition, the lower end of upper spring 17B is connected on the top 8D of movable plunger 8 intermediate portions, and its upper end is connected to below the flange of cylinder part 12.

If the employing aforementioned structure, cylinder part 12, suck valve seat 13 and discharge in the pilot hole 12A between the valve seat 9 and form pump chamber 18.

And, 19 are formed by magnetic material, constitute columnar bar, by the upper end thinner wall section of bar 19 is riveted to the inside, inflow interface 15, upside pole plate 4B fix to coil rack 1 top flange 1C, by the lower end thinner wall section of bar 19 is riveted to the inside, the downside pole plate 4A that comprises secured core 3 fixes to coil rack 1 below flange 1B.

If the employing aforementioned structure forms magnetic loop by bar 19-upside pole plate 4B-movable plunger 8-secured core 3-downside pole plate 4A-bar 19.

In addition, 19A is the mounting portion of other parts of trend, and this processes notch portion to process otch (cut and owe I) side direction bending downwards on the part of bar 19, forms this 19A.On the 19A of mounting portion, wear out installation through hole 19B.

The 20th, a pair of cave shape terminal plug that links to each other with coil winding terminal with the coil winding top of electromagnetic coil 2, this cave shape terminal plug 20 is given prominence to the inner bottom part of coupling piece 21 and is buried underground.

Form coupling piece 21 simultaneously by the molded bar 19 upper end thinner wall section of synthetic resin with when flowing into interface 15 below peripheries.

Below Fuelinjection nozzle J is described.

The 30th, the coil rack that cylindrical part 30A, top flange 30B that is formed by synthetic resin and below flange 30C form, electromagnetic coil 31 is wrapped on the periphery of cylindrical part 30A.

The inflow interface that 32 expressions are made by magnetic material, the upside pole plate 32A that it comprises on the top flange 30B that is arranged on coil rack 30 also comprises simultaneously by the following outstanding downwards secured core 32B of upside pole plate 32A, by the top outstanding upward intake channel 32C of upside pole plate 32A.

Because wear fuel inflow road 32D from the upper end of intake channel 32C to the lower end of secured core 32B, the annular spring adjustment pipe 33 that will face the below is embedded into fuel and flows in the 32D of road with connecting.

And, the 3rd seal ring 34 is arranged near the upper end that is located in intake channel 32C in the circular groove on the periphery.To install in addition with circular groove 32E be located in than the 3rd seal ring 34 more by under the periphery of intake channel 32C on.The transverse shape of circular groove 32E is the scarce toroidal of D disconnection shape preferably.

This is the rotation for containment Fuelinjection nozzle J.

Aforementioned inflow interface upside pole plate 32A be arranged on coil rack 30 above on the flange 30B in, secured core 32B inserts and is arranged in the cylindrical part 30A of coil rack 30.

The iron core of relative configuration with the lower end surface of secured core 32B when 35 expression freedoms of movement ground are configured in the cylindrical part 30A of coil rack 30, this iron core 35 pushes to the direction of leaving secured core 32B by spring 36 quilts.

The bar that 37 expressions are formed by magnetic material, the bottom in the middle of roughly being formed on is arranged with coil rack accepting hole 37B towards the top, be arranged with valve body accepting hole 37C simultaneously downwards.

Thereby, comprising the coil rack 30 of electromagnetic coil 31 and the upside pole plate 32A of inflow interface 32 is housed in the coil rack accepting hole 37B of bar 37, under this state, the thinner wall section that is formed on bar 37 upper ends is riveted to the inside to the upper end of upside pole plate 32A.

38 are illustrated in the valve body that the lower end has worn spray orifice 38A, in this valve body 38, comprise that the needle-valve 39 of the 39A of mitre velve portion that opens and closes spray orifice 38A is arranged in the lower end with can move freely, on the upper end of this needle-valve 39 fixing aforementioned unshakable in one's determination 35.

The valve body 38 that comprises iron core 35 and needle-valve 39 is configured in the valve body accepting hole 37C of bar 37 from the below insertion, and the lower end thinner wall section of bar 37 is riveted to the inside to the necking down stepped part of valve body 38.

40 expressions are a pair of twines the cave shape terminal plug that top links to each other with coil winding terminal with the coil of electromagnetic coil 31, and this cave shape terminal plug 40 is buried underground highlightedly at the inner bottom part of coupling piece 41.

Form coupling piece 41 simultaneously by the upper end thinner wall section of the molded bar 37 of synthetic resin with when flowing into interface 32 below peripheries.

42 expressions are configured in the 4th seal ring in the circular groove that is located near the periphery in bar 37 lower ends.

Below base body B is described.

Base body B is included in the mounting flange portion 50 of top and side extension, runs through setting from upper end 50A to lower end 50F fuel flow path 51.

In aforementioned fuel flow path,, just the secured core 3 more outstanding downwards than the downside pole plate 4A of petrolift P can be able to be inserted in the fuel flow path 51A to the following diameter that has of the fuel flow path 51A of the upper end of base body B 50A opening formation.At the following diameter that has of the fuel flow path 51B of the lower end of base body B 50F opening formation, just the circular groove 32E intake channel 32C more upward than Fuelinjection nozzle J can be inserted in the fuel flow path 51B.

When in the mounting flange portion 50 of base body B, wearing mounting hole 50E, form the first tapped hole 50B, on the 50F of lower end, form the second tapped hole 50C.In addition, in the present embodiment, fuel flow path 51 (at the fuel flow path 51A of upper end 50A upper shed, at the fuel flow path 51B of lower end 50B upper shed) point-blank forms.

Adopt following step that petrolift P and Fuelinjection nozzle J are installed on the base body B then.

When being inserted into the bottom of the secured core 3 of petrolift P in the fuel flow path 51A of the upper end of base body B 50A inner opening, the lip part 3A that is formed on the secured core 3 of downside pole plate 4A below is configured on the upper end 50A of base body B, under this state, the mounting hole 19B of the 19A of installation sheet portion by bar 19 is screwed in screw 60 in the first tapped hole 50B.

If employing preceding method, insert in the fuel flow path 51A of base body B the below of the secured core 3 by will constituting petrolift P, petrolift P is upright to be established when being supported on the base body B, by the 19A of installation sheet portion being screwed on the base body B rotation of containment petrolift P by screw 60.

In addition, keep tightness between interior week of the periphery of inserting the secured core 3 in the fuel flow path 51A and aforementioned fuel flow path 51A by the first seal ring 6A.

Below adopt following step that Fuelinjection nozzle J is installed on the base body B.

The clip 61 of one side opening is chimeric to be configured in the circular groove 32E (forming scarce circular troughs such as D otch) of Fuelinjection nozzle J, then, intake channel 32C inserts configuration and is in the fuel flow path 51B of base body B lower end 50B opening, under this state, utilize and connect the mounting hole that wears, the second tapped hole 50C towards base body B is screwed in screw 62 on the clip 61.

If employing preceding method, in the fuel flow path 51B in the intake channel 32C insertion base body B that will constitute Fuelinjection nozzle J, upright the establishing of Fuelinjection nozzle J is supported on the base body B, and clip 61 is screwed on the base body B by screw 62 simultaneously, the rotation of containment Fuelinjection nozzle J.

In addition, keep the tightness between week in the periphery of inserting the intake channel 32C in the fuel flow path 51B and the fuel flow path 51B by the 3rd seal ring 34.

If the employing aforementioned structure, petrolift P integratedly location and installation on the 50A of the upper end of base body B, Fuelinjection nozzle J integratedly location and installation on the 50F of the lower end of base body B.

Above-mentioned petrolift P and Fuelinjection nozzle J are installed in fuel supplying device on the base body B integratedly towards the following configuration of internal-combustion engine.

Describe in conjunction with Fig. 2,60 expression inlet air pathways 61 are located in its inner suction tude with connecting, and the downstream of inlet air pathway 61 links to each other with internal-combustion engine E, and its upstream links to each other with following throttle valve body.

In addition when inserting the underpart of the underpart of the bar 37 of Fuelinjection nozzle J and valve body 38 in the suction tude 60, be located on the suction tude 60 to the injection valve supporting hole 62 of inlet air pathway 61 inner openings.And base body support part 63 is formed on the suction tude 60 formation tapped hole 63B on the 63A of the upper-end surface of base body support part 63 obliquely highlightedly.

On the one hand, because the inlet air pathway 65 that links to each other with the inlet air pathway 61 of suction tude 60 is located in the aforementioned throttle valve body 64, inlet air pathway 65 is opened and closed by the butterfly type throttle valve 67 that is installed on the throttle spindle 66, and throttle spindle 66 rotates and is mounted freely in the throttle valve body 64.

The rotating operation of this throttle spindle 66 is operated by the user.

In addition, the upstream side of the inlet air pathway 65 of aforementioned throttle valve body is connected on the air-strainer 68.Just, supply to internal-combustion engine E by the clean air behind the air-strainer 68 removal foreign matters by the inlet air pathway 65 of throttle valve body 64, the inlet air pathway 61 of suction tude 60.At this moment, the air quantity that supplies to internal-combustion engine E decides according to the aperture of the throttle valve 67 that the operator handled.

The base body B that comprises petrolift P and Fuelinjection nozzle J adopts following manner to be installed on the suction tude 60.

Just, be arranged in the mounting flange portion 50 of base body B on the upper-end surface 63A of base body support part 63 of suction tude 60, simultaneously, insert in the injection valve supporting hole 62 of suction tude 60 underpart of bar 37 that comprises the valve body 38 of Fuelinjection nozzle J, under this state, utilize the mounting hole 50A of mounting flange portion 50, screw 63C is screwed in the tapped hole 63B of base body support part 63.If the employing aforementioned structure, because base body B is fixedly mounted on the suction tude 60, at this moment, the underpart of bar 37 that comprises the valve body 38 of Fuelinjection nozzle J is supported in the injection valve supporting hole 62.Thereby also at injection valve supporting hole 62 inner openings, spray orifice 38A is by inlet air pathway 61 inner openings of injection valve supporting hole 62 in suction tude 60 at the spray orifice 38A of the lower end surface opening of the valve body 38 of Fuelinjection nozzle J.

Fuel distribution tube is to following such execution.Just the fuel pot T of storage inside fuel flows into road 16 with fuel in the inflow interface 15 that is located in petrolift P and is linked to each other by fuel pipe 69.

Measurement (メ ス) the type connector that links to each other with ECU external power supplys such as (electric controllers) is chimeric to be connected in the coupling piece 21 of petrolift P, and the measurement type connector that similarly links to each other with external power supply is chimeric to be connected in the coupling piece 41 of Fuelinjection nozzle J.Aforementioned ECU, measurement type connector are not shown in the figures.

And the filter of the foreign matter from the fuel that fuel pot T supplies with is removed in 70 expressions in fuel pipe 69, and the low voltage side filter of the foreign matter from the fuel that fuel pot T supplies with is removed in 71 expressions in fuel pipe 69.

If select to comprise the fuel injection system of aforementioned fuel supplying device, in the running of the internal-combustion engine that comprises the engine starting action, owing to export electrical signal to petrolift P from ECU, when not when the electromagnetic coil 2 of petrolift P is switched on, the elastic force that movable plunger 8 remains on spring 17A and upper spring 17B keeps under first state of balance, and pump chamber 18 keeps little volume conditions.

In a single day switch on to electromagnetic coil 2 then, movable plunger 8 keeps attracting the second mobile state to secured core 3, and the chamber volume of pump chamber 18 keeps the mobile of corresponding movable plunger and the state of increase.

According to exporting electrical signal to petrolift P from ECU, movable plunger 8 is the elements to should electrical signal moving back and forth, under the state that the chamber of pump chamber 18 volume increases, when discharging check valve 11 inaccessible discharge valve seats 9, sucking check valve 14 opens wide suction valve seat 13, thereby the fuel in the fuel pot T sucks in the pump chamber 18 by fuel pipe 69.

On the other hand, under the chamber of pump chamber 18 volume diminishes state, when sucking check valve 14 inaccessible suction valve seats 13, discharge check valve 11 discharge valve seat 9 is opened wide, the fuel after boosting in pump chamber 18 is discharged road 5 discharges to fuel.

According to afore-mentioned, in the running of the internal-combustion engine that comprises the engine starting action, the fuel in the fuel pot T to be boosted in pump chamber 18, the fuel supply after will being boosted by continuous fuel discharge road 5 is in the fuel flow path 51 of base body B.

On the one hand, export electrical signal from ECU to Fuelinjection nozzle J owing to identical with petrolift P, in case electromagnetic coil 31 energisings, unshakable in one's determination 35 elastic force against spring 36 attract to secured core 32B, and the 39A of mitre velve portion of needle-valve 39 is unlimited to spray orifice 38A.

Thereby because needle-valve 39 correspondences are unlimited to spray orifice 38A from the injection signal (current"on"time) of ECU, the fuel after boosting in the fuel flow path 51 of base body B sprays supply by spray orifice 38A in the inlet air pathway 61 of suction tude 60.

And the air quantity that supplies to internal-combustion engine is supplied with by the aperture control of throttle valve 67, by supplied with and the fuel of control and the air of being controlled by throttle valve 67 running that internal-combustion engine is fit to by Fuelinjection nozzle J.

The aforementioned fuel supplying device according to the present invention, go up and form owing in advance petrolift P and Fuelinjection nozzle J being installed in base body B, the parts of fuel supply system all can be installed on the vehicle by base body B being installed on the suction tude 60, can greatly improve the assembling performance of vehicle.

This is effective on installing space as two-wheel vehicle ultimately limits.

And, because the connection of fuel pipe 69 also can be only the fuel flow path 16 of petrolift P to be linked to each other with fuel pot T, can improve the design freedom of fuel distribution tube, can improve this pipe arrangement connection operation simultaneously.

And, constitute by fuel flow path 51 in the base body B with the mobile fuel under high pressure pipe arrangement of fuel that boosts that petrolift P links to each other with Fuelinjection nozzle J, need not to consider especially the withstand voltage of fuel distribution tube.Particularly, the structure optimization that the moving fuel flow path 51 of after-burning materials flow is formed in the base body B that boosts is applied to the cart that fuel supply system directly is exposed on the external.

Even it is just also less and improve attractive in appearance with the danger of injurant impact damage.

And, if select to use the petrolift P of electromagnetic coil 2, because electromagnetic coil 2 self-heatings when pump drives, though when petrolift P and the approaching configuration of Fuelinjection nozzle J, the heat that is produced by electromagnetic coil 2 acts on the Fuelinjection nozzle J, is present in the tendency of the fuel temperature rising of flowing in the Fuelinjection nozzle J, if select the present invention, because petrolift P is connected by base body B with Fuelinjection nozzle J, can contain by the heating that the electromagnetic coil 2 of petrolift P causes to Fuelinjection nozzle J.

If the selection aforementioned structure can be contained in the generation of steam in the fuel that flows in the Fuelinjection nozzle J, and, correct fuel can be supplied with in suction tude 61 continuously.

At this moment, the material of base body B is the thermal conductivity synthetic resin material lower than metallic material.For example nylon resin, epoxy resin are if use poly-p-phenylene sulfide, better effects if.

And when internal-combustion engine is in low-speed running or during state such as high load low-speed running, though the temperature of suction tude 60 greatly raises, in the present invention, petrolift P does not directly link to each other with Fuelinjection nozzle J, and petrolift P links to each other with Fuelinjection nozzle J by base body B.

According to aforementioned structure, petrolift P can be provided with from suction tude 60 in the distance of the thickness t that is equivalent to base body B.And base body B can contain that the heat from suction tude 60 causes that the temperature of petrolift P raises between suction tude 60 and petrolift P.Therefore can use the low electromagnetic coil of insulating properties 2, obtain to reduce the effect of electromagnetic coil manufacture cost.And, as above-mentioned, make base body B by synthetic resin, can improve aforementioned effect more.

And when carrying on vehicle, there is the situation that applies external force downwards on petrolift P that gives prominence to the top, edge or the Fuelinjection nozzle J that gives prominence to.For example apply external force to petrolift P, even be inserted in secured core 3 distortion of the interior petrolift P of the fuel flow path 51A of base body B upper end 50A opening, this distortion does not directly give Fuelinjection nozzle J any influence, does not have a strong impact on the action of Fuelinjection nozzle J.Particularly, this equipment is preferably applied to expose the cart of exterior arrangement.

And because the assembly that petrolift P and Fuelinjection nozzle J are installed in perforation is just on the base body B, fixing their fixing means of supporting can be simplified.

In addition, as shown in Figure 1, because being located in fuel on the secured core 3 of petrolift P discharges the longitudinal axis X-X on road 5, is located in that fuel on the inflow interface 32 of Fuelinjection nozzle J flows into the longitudinal axis Y-Y of road 32D, the longitudinal axis Z-Z that is located in the fuel flow path 51 on the base body B is arranged on same the straight line, the fuel straight movement to Fuelinjection nozzle J can be improved, the responsiveness of fuel supply can be improved from petrolift P.

The head pressure of petrolift P is lower than the head pressure (300kPa) of prior art, the supply of fuel in the time of for example can improving the starting in the electromagnetic plunge pump etc. of the petrolift P head pressure of using 100kPa.In addition, close between the aforementioned axis to tie up among Fig. 3 and show.

As shown in Figure 1, the coupling piece 21 of petrolift P and the coupling piece 41 of Fuelinjection nozzle J are the elements that are provided with to same peripheral direction, the measurement type connector that links to each other with external power supply such as ECU can connect from same direction when being connected with aforementioned coupling piece, can improve operation.

This particularly strengthens on the qualification installing space relatively more effective as cart.

And, removing is included in the fuel flow path 51 that the high pressure side fuel filter 72 that transfers to the foreign matter the fuel of Fuelinjection nozzle J from petrolift P is positioned at base body B, and be arranged between the upper end of inflow interface 32 of the lower end of secured core 3 of petrolift P and Fuelinjection nozzle J, can dispose high pressure side fuel filter 72 easily.

Just, need not connect at the pipe arrangement of high pressure side fuel filter 72.Do not need housing on every side around high pressure side fuel filter 72.By petrolift P is pulled down from base body B, high pressure side fuel filter 72 can carry out maintenance operation easily.

In addition, though considering the fuel that high pressure side fuel filter 72 is arranged on aforementioned fixation iron core 3 discharges in the road 5, or the fuel that is arranged on the inflow interface 32 of Fuelinjection nozzle J flows in the 32D of road, if employing aforementioned structure, because the filter area of high pressure side fuel filter 72 is difficult to obtain sufficient filter area by the restriction of aforementioned stream path.

Flow in the 32D of road if high pressure side fuel filter 72 is arranged on fuel, just can not be subjected to aforementioned limitations, can select the high pressure side fuel filter 72 that is fit to.

Followingly second embodiment of fuel supplying device of the present invention is described according to Fig. 4.In addition, petrolift P is identical with Fig. 1 embodiment with Fuelinjection nozzle J, and same structure uses same-sign, has omitted explanation.

Base body 80 comprises the side lip part 80A that faces left and faces the horizontal flanges 80B of substantially horizontal, be formed for being threaded on the lip part 80A of the side first tapped hole 80C of petrolift P is formed for the second tapped hole 80E that is installed into the mounting hole 80D of tracheae and is used to install Fuelinjection nozzle J at horizontal flanges 80B.

In addition, at the opening of the left fuel flow path 81A that on the left side 80F of side flange 80A, wears out formation fuel flow path 81, wear out the opening of the Vertical direction fuel flow path 81B of formation fuel flow path 81 towards the lower end surface of horizontal flanges 80B 80G.

Thereby the longitudinal axis Z-Z of the longitudinal axis X-X of the fuel flow path 81A of left and Vertical direction fuel flow path 81B intersects vertically in base body B.

The secured core 3 of petrolift P is inserted in the fuel flow path 81A of left, and under this state, the assembly department 19A of petrolift P is threadably engaged in the first tapped hole 80C by screw 60, thereby petrolift P is fixed on the side flange 80A of base body B.

On the other hand, the intake channel 32C of the inflow interface 32 of Fuelinjection nozzle J inserts in the Vertical direction fuel flow path 81B, and under this state, screw 62 is screwed in the second tapped hole 80E by clip 61, and Fuelinjection nozzle J is fixed on the horizontal flanges 80B of base body B.

Adopt aforementioned structure, the longitudinal axis X-X that is located in the fuel flow path 5 on the secured core 3 of petrolift P disposes in the horizontal direction along the fuel flow path 81A of left, be located in longitudinal axis Z-Z that fuel in the intake channel 32C of Fuelinjection nozzle J flows into road 32D vertically fuel flow path 81B dispose in Vertical direction, road 5 discharged by fuel and fuel flows into road 32D by left fuel flow path 81A and Vertical direction fuel flow path 81B cross-over configuration.

If the employing aforementioned structure acts in the fuel flow path 81A of left though the fluctuation pressure that is produced in pump by the driving of petrolift P is discharged road 5 by fuel, this fluctuation pressure with intersect Vertical direction fuel flow path 81B collision and decay.

On the one hand, act in the Vertical direction fuel flow path 81B though open and close spray orifice 38A and make the fluctuation pressure that produces at Fuelinjection nozzle J flow into road 32D by fuel by Fuelinjection nozzle J, this fluctuation pressure with intersect left fuel flow path 81A the sidewall collision and decay.Thereby, owing to can reduce the effect of the fluctuation pressure that in mutual machine, produces, obtain to keep well the effect of the discharging performance of the pump performance of petrolift P and Fuelinjection nozzle J to other machine part.

Below in conjunction with Fig. 5 third embodiment of the invention is described.

In addition, use same-sign, omit explanation it with Fig. 1 same section.

The 90th, the low voltage side fuel filter has following structure.

The 91st, lower opening and comprise that at sidewall the cup-shaped that the end is arranged that fuel flows into road 92 filters housing, the 93rd, the filter cap of the lower opening of inaccessible aforementioned filtration housing.

Central part at aforementioned filter cap is provided with the 93A of tube portion that above-below direction extends, and wears on the 93A of tube portion from the upper end to the stream 93D of lower end.

Form screw thread 93E on the periphery of the 93A of tube portion that extend this external below.

In addition, the outer peripheral portion of filter cap 93 inwardly is riveted on the peripheral outer lips of filtering housing 91, thereby, filter housing 91 and filter cap 93 and form hermetically.

The 94th, the filter of formation tubular, planar upper plate 94A is linked to each other by annular filter paper 94C with lower plate 94B, and the 93A of top cylinder portion imports the inboard (inboard of filter paper 94C) that is configured in filter 94 into.In addition, filter 94 is located at upper plate 94A and filters that spring 95 between housing 91 bottoms presses against on the filter cap 93 and fixing by contracting.

In addition, inflow interface 15 outstanding above petrolift P has flange 15A in the upper end, is located in the fuel inflow road 16 that flows on the interface 15 and passes through female thread 15B at flange 15A upper-end surface opening.

Thereby, being threadably engaged on the female thread 15B that flows into interface 15 by external screw thread 93E the 93A of tube portion, aforementioned low voltage side fuel filter 90 screw threads are fixed on the flange 15A of inflow interface 15 of petrolift P.

And the fuel of low voltage side fuel filter 90 flows into road 92 and keeps fuel pipe 60, and T links to each other with fuel pot.

Thereby, in case driving fuel pump P, fuel in the fuel pot T flows into and filters in the housings 91 by fuel pipe 60, fuel inflow road 92, and this fuel is removed foreign matter by the filter paper 94C of filter 94, flows into 16 supplies clean fuel in road from the stream 93D at filter 94 inner openings to the fuel of petrolift P.

If the employing previous embodiment, because low voltage side fuel filter 90 is wholely set with petrolift P, fuel pipe 69 also can flow into the fuel of low voltage side fuel filter 90 on tunnel 92 and link to each other with fuel pot T, and fuel pipe 69 is simple, can simplify the connection operation.

By base body B is pulled down from suction tude 60, can temporarily low voltage side fuel filter 90 be taken off, can improve the maintenance of aforementioned filter.

By low voltage side fuel filter 90 directly is configured on the petrolift P, can have the effect of petrolift P being cooled off by the fuel in the low voltage side fuel filter 90.

Petrolift P of the present invention can be volume type pump, the non-volume type pump that is called by constitute the electric fuel pump of pumping action to the electromagnetic coil energising.

In addition, also can replace suction tude 60, base body B is installed on the throttle valve body 64.

And the structure of Fuelinjection nozzle J is not limited to this structure of embodiment, and Fuelinjection nozzle J and the installation method of petrolift P on base body B are not limited to embodiment.

Claims (7)

1. fuel supplying device, fuel in fuel pot boosts in petrolift, and the fuel after will boosting by Fuelinjection nozzle in the fuel supplying device that internal-combustion engine spray to be supplied with, it is characterized in that, Fuelinjection nozzle (J) and petrolift (P) are installed on the base body (B) integratedly, simultaneously, the fuel inflow road (32D) of the fuel of petrolift (P) discharge road (5) and Fuelinjection nozzle J links to each other by the fuel flow path (51) that is located in the base body B.The base body (B) that will comprise aforementioned petrolift and Fuelinjection nozzle (J) is installed on the suction tude (60), and the spray orifice (38A) of the Fuelinjection nozzle of being supported by base body (B) and suction tude (60) (J) is to suction tude (60) inner opening.

2. fuel supplying device according to claim 1 is characterized in that: the longitudinal axis X-X on the fuel discharge road (5) of petrolift, the fuel of Fuelinjection nozzle (J) flow into the longitudinal axis Z-Z on road (32D), the longitudinal axis Y-Y of fuel flow path (51) is configured on same the straight line.

3. according to the described fuel supplying device of claim 1, it is characterized in that: the fuel of petrolift is discharged the longitudinal axis X-X on road (5), the fuel of Fuelinjection nozzle (J) flows into the longitudinal axis cross-over configuration of the longitudinal axis Z-Z on road (32D) by fuel flow path (51).

4. according to the described fuel supplying device of claim 1, it is characterized in that: the coupling piece (41) that coupling piece (21) that the electromagnetic coil (2) interior with being configured in aforementioned petrolift links to each other and the electromagnetic coil (31) interior with being configured in Fuelinjection nozzle (J) link to each other is arranged on same peripheral direction.

5. according to the described fuel supplying device of claim 1, it is characterized in that: high pressure side fuel filter (72) is arranged in the fuel flow path (51) of aforementioned base body.

6. according to the described fuel supplying device of claim 1, it is characterized in that: the fuel that low voltage side fuel filter (90) is arranged on integratedly aforementioned petrolift flows in the road (16).

7. according to this fuel supplying device of claim 1, it is characterized in that: form aforementioned base body by synthetic resin.

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