CN101943095A - Fuel injection system - Google Patents
Fuel injection system Download PDFInfo
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- CN101943095A CN101943095A CN2010102200112A CN201010220011A CN101943095A CN 101943095 A CN101943095 A CN 101943095A CN 2010102200112 A CN2010102200112 A CN 2010102200112A CN 201010220011 A CN201010220011 A CN 201010220011A CN 101943095 A CN101943095 A CN 101943095A
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- petrolift
- pressure regulator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention provides a kind of can implement device miniaturization and can improve fuel injection system with respect to the vibration resistance of the vibration of motor.Fuel injection system (10) comprises throttle body (12) with the tubular wall portion (20) that is used to form inlet air pathway (21) integratedly, the Fuelinjection nozzle (14), the fuel pressure regulator valve (18) that is fed into the fuel pressure in the Fuelinjection nozzle (14) to the petrolift (16) and the adjustment of Fuelinjection nozzle (14) fueling of burner oil in inlet air pathway (21).Petrolift (16) disposes on shape ground side by side with the tubular wall portion (20) of throttle body (12).The direction separate configuration petrolift (16) and the fuel pressure regulator valve (18) that intersect along orientation with the tubular wall portion (20) of throttle body (12) and Fuelinjection nozzle (14).Fuelinjection nozzle (14) is positioned between petrolift (16) and the fuel pressure regulator valve (18) to be set up in parallel.
Description
Technical field
The present invention relates to the fuel injection system in a kind of motor (internal-combustion engine) of the vehicles such as two-wheel vehicle, automobile, all-terrain vehicle such as bicycle, motor bike that mainly are used in band prime mover.
Background technique
The example in the past of fuel injection system at first is described.Fig. 5 is the exploded perspective view of expression fuel injection system.
As shown in Figure 5, fuel injection system 200 comprise throttle body (throttle body) 230 integratedly with the tubular wall portion 231 that is used to form inlet air pathway 231a, be used for to inlet air pathway 231a burner oil Fuelinjection nozzle 252, be used to supply fuel to Fuelinjection nozzle 252 petrolift 253, be used to adjust the fuel pressure regulator valve 270 of the pressure that is fed into the fuel in the Fuelinjection nozzle 252.Fuelinjection nozzle 252 is assembled in the top of the tubular wall portion 231 of throttle body 230.In addition, petrolift 253 is assembled in the top of throttle body 230.The length direction of petrolift 253 (axial direction) points to the axial direction direction of quadrature roughly that length direction with throttle body 230 is a tubular wall portion 231.In addition, Fuelinjection nozzle 252 is configured between tubular wall portion 231 and the petrolift 253.This kind fuel injection system has for example been proposed in patent documentation 1.
Patent documentation 1: TOHKEMY 2005-105987 communique
In the fuel injection system 200 of above-mentioned example in the past, the axial direction of the tubular wall portion 231 of the length direction of petrolift 253 (axial direction) sensing and throttle body 230 is the direction of quadrature roughly.Therefore, expose more as the end of the axial direction of the petrolift 253 of weight thing with respect to tubular wall portion 231.This kind configuration mode not only hinder the miniaturization of fuel injection system 200 and also cause existing weight balancing poor, for the low problem of the vibration resistance of engine luggine.
Summary of the invention
The problem that desire of the present invention solves is, provide a kind of can implement device miniaturization and can improve fuel injection system for the vibration resistance of engine luggine.
Can utilize the described structure of following technological scheme to solve above-mentioned problem for the fuel injection system of purport.
That is, adopt technological scheme 1 described fuel injection system,, can reduce the amount of exposing that the weight thing is a petrolift, thereby can realize the miniaturization of fuel injection system with respect to tubular wall portion by disposing petrolift with the tubular wall portion of throttle body shape arranged side by side ground.In addition, direction separate configuration petrolift and fuel pressure regulator valve by intersecting along the orientation with the tubular wall portion of throttle body and Fuelinjection nozzle can improve weight balancing, and raising is for the vibration resistance of engine luggine.
Adopt technological scheme 2 described fuel injection systems, make Fuelinjection nozzle between petrolift and fuel pressure regulator valve, be set up in parallel petrolift and fuel pressure regulator valve.Thereby, can make Fuelinjection nozzle between petrolift and fuel pressure regulator valve, concentrate petrolift and fuel pressure regulator valve.This kind configuration mode can be realized the miniaturization of fuel injection system effectively and improve vibration resistance for engine luggine.
In addition, adopt technological scheme 3 described fuel injection systems, this fuel injection system also comprises the high pressure fuel passage of the direction extension that intersects along the orientation with the tubular wall portion of throttle body and Fuelinjection nozzle, and the fuel introducing port of the fuel ejiction opening of petrolift, the fuel introducing port of Fuelinjection nozzle and fuel pressure regulator valve is to be communicated with this high pressure fuel passage with mode that the path wall of above-mentioned high pressure fuel passage is faced.Thereby, can shorten high pressure fuel passage path-length, and can simplify access structure, thereby can reduce the risk of fuel leak.
In addition, adopt technological scheme 4 described fuel injection systems, this fuel metering unit also comprises the fuel chambers that is used for accommodating petrolift and stores fuel, is used for accommodating the fuel pressure regulator valve and stores the unnecessary fuel chambers of the unnecessary fuel of discharging from the fuel pressure regulator valve and is used to make the unnecessary fuel of unnecessary fuel chambers to turn back to the low-pressure fuel path of fuel chambers, and disposes the low-pressure fuel path with high pressure fuel passage shape arranged side by side ground.Thereby, can be easy in the low-pressure fuel path, handle.
In addition, adopt technological scheme 5 described fuel injection systems, this fuel injection system also comprises the fuel ejiction opening with petrolift, the high pressure fuel passage that the fuel introducing port of Fuelinjection nozzle and the fuel introducing port of fuel pressure regulator valve are communicated with, the fuel chambers that is used to accommodate petrolift and stores fuel, the unnecessary fuel chambers that is used to accommodate the fuel pressure regulator valve and stores the unnecessary fuel of discharging from the fuel pressure regulator valve, be used for making the unnecessary fuel of unnecessary fuel chambers to turn back to low-pressure fuel path in the fuel chambers, with at least one side's who is used for controlling petrolift and Fuelinjection nozzle electric control device, and be adjacent to dispose electric control device with at least one side in high pressure fuel passage and the low-pressure fuel path.Thereby, can utilize the fuel cool electronic control gear that flows among at least one side in high pressure fuel passage and low-pressure fuel path.
Description of drawings
Fig. 1 is the plan view of expression one embodiment's fuel injection system.
Fig. 2 is the sectional view of expression fuel injection system.
Fig. 3 is the vertical view cutaway drawing of expression fuel injection system.
Fig. 4 is the plan view that the fuel injection system behind the lid is pulled down in expression.
Fig. 5 represents the exploded perspective view of the fuel injection system of example in the past.
Embodiment
Below, use description of drawings to be used to implement embodiments of the present invention.
One embodiment of the invention are described with reference to the accompanying drawings.The fuel injection system of present embodiment is the device that is used in the motor of two-wheel vehicle.Fig. 1 is the plan view of expression fuel injection system, and Fig. 2 is the sectional view of this fuel injection system, and Fig. 3 is the vertical view cutaway drawing of this fuel injection system, and Fig. 4 is the plan view that the fuel injection system behind the lid is pulled down in expression.In addition, for convenience of description, the upstream side of inlet air pathway is regarded as the front side, regarded the downstream side of inlet air pathway as rear side ground explanation fuel injection system.In addition, the above-below direction of injection apparatus that acts as a fuel of the above-below direction when being equipped on fuel injection system on the two-wheel vehicle.
As shown in Figure 4, fuel injection system 10 comprises throttle body 12, Fuelinjection nozzle 14, petrolift 16 and fuel pressure regulator valve 18 integratedly.In addition, because Fuelinjection nozzle 14, petrolift 16 and fuel pressure regulator valve 18 are known members, therefore the structure of omitting above-mentioned member is elaborated.
As shown in Figure 2, above-mentioned throttle body 12 has resin system for example and the tubular wall portion 20 of the open circles tubulose that runs through along fore-and-aft direction.The hollow part of tubular wall portion 20 forms inlet air pathway 21.The center line of inlet air pathway 21 (axis) L 1 extends along fore-and-aft direction.In addition, the upstream side member of inlet air pathway 21 (for example air filter) is connected with the front end (right part among Fig. 2) of tubular wall portion 20.In addition, the downstream side member of inlet air pathway 21 (for example intake manifold) is connected with the rearward end (left part among Fig. 2) of tubular wall portion 20.Thereby institute's inhaled air flows to rear side from the front side in inlet air pathway 21.
On the central part of the axial direction of above-mentioned tubular wall portion 20, support to have radially, be the revolvable throttle plate pin (throttle shaft) 23 that left and right directions (positive and negative direction of paper among Fig. 2) crosses above-mentioned inlet air pathway 21.The discoideus air throttle (throttlevalve) 25 of the butterfly that is used to open and close inlet air pathway 21 is installed on throttle plate pin 23.In addition, an end (right part) of throttle plate pin 23 is outstanding to a side (right side) from tubular wall portion 20, is provided with gate footstep lever (throttle lever) 27 (with reference to Fig. 4) on the shaft end of this throttle plate pin 23.Between the relative face of gate footstep lever 27 and tubular wall portion 20, the Returnning spring 29 that is made of helical spring is installed.Returnning spring 29 applies active force to closing direction by 27 pairs of above-mentioned throttle plate pins 23 of gate footstep lever and above-mentioned air throttle 25 all the time.In addition, on gate footstep lever 27, the accelerating unit backguy that links to each other with not shown accelerating unit is installed with the state coiling that is connected with this gate footstep lever 27.So backguy makes air throttle 25 rotations by accelerating unit by the acceleration operation according to accelerating unit, can be adjusted at the suction air quantity that flows in the inlet air pathway 21.
As shown in Figure 4, comprehensive sensor 31 is installed on the left-hand face of above-mentioned tubular wall portion 20.Comprehensive sensor 31 comprises the pressure transducer that is used for detecting at the pressure of the suction air that above-mentioned inlet air pathway 21 flows integratedly, be used for detecting intake air temperature sensor in the temperature of the suction air that inlet air pathway 21 flows, be used for detecting above-mentioned air throttle 25 the aperture position throttle position sensor and be used to be controlled at the constituent parts (not shown) such as IACV (Idle Air Control Valve) (below be called " isc valve ") of the suction air quantity that the bypass of walking around air throttle 25 flows.In addition, on the front surface of comprehensive sensor 31, be provided with the electric coupler 32 that the connector of each sensor and isc valve is concentrated on 1 place.(frontal of paper Fig. 4) inserts electric coupler 32 from the place ahead by the aerial lug (omitting diagram) that will be electrically connected with the electric control device (ECU) of not shown outside, thereby this aerial lug is connected with electric coupler 32.
As shown in Figure 2, the upside of the tubular wall portion 20 of above-mentioned throttle body 12 be formed be before the low skewed open circles tubular injection valve mounting hole 34 in high back.End face (upper wall surface) opening of the rear and lower end of injection valve mounting hole 34 in the end of downstream side of above-mentioned inlet air pathway 21.In addition, the center line of injection valve mounting hole 34 (axis) L2 is positioned on the vertical guide P1 of the axis L1 that comprises inlet air pathway 21 (with reference to Fig. 4).
As shown in Figure 2, above-mentioned Fuelinjection nozzle 14 is electromagnetic drive type Fuelinjection nozzles and forms cylindric.Upward be formed with spray nozzle part 36 in an end of Fuelinjection nozzle 14 (front end) with fuel orifice 37 with Fuelinjection nozzle 14 concentric shape ground.By this spray nozzle part 36 being inserted in the above-mentioned injection valve mounting hole 34 this spray nozzle part 36 is connected with above-mentioned injection valve mounting hole 34 concentric shape ground.And the axis that makes Fuelinjection nozzle 14 or basically identical consistent with axis L2.In addition, the O RunddichtringO 38 as sealing component is installed in the circular groove on the outer circumferential face that is formed at spray nozzle part 36 (omission reference character), this O RunddichtringO 38 is used for sealing between the peripheral wall surfaces with spray nozzle part 36 and injection valve mounting hole 34.In addition, upward be formed with fuel introduction part 40 in the other end of Fuelinjection nozzle 14 (base end part) with fuel introducing port 41 with Fuelinjection nozzle 14 concentric shape ground.In addition, the explanation of the high pressure fuel passage 80 that is communicated with fuel introducing port 41 is seen below state.
On the lateral part of above-mentioned Fuelinjection nozzle 14, be provided with the electric coupler 43 that is set up in parallel with above-mentioned fuel introducing port 41 highlightedly.Electric coupler 43 disposes up, the aerial lug that will be electrically connected (omit diagram) with not shown electric control device (ECU) from the front upper place (upper right Fig. 2) insert this electric coupler 43, thereby electric coupler 43 is connected with this aerial lug.In addition, Fuelinjection nozzle 14 fuel that utilizes Electromagnetic Drive to import from the fuel introducing port 41 of fuel introduction part 40 is ejected in the inlet air pathway 21 from the fuel orifice 37 of spray nozzle part 36.
As shown in Figure 4, be formed with pump receiving cartridge portion 45 in the upper right side of the tubular wall portion 20 of above-mentioned throttle body 12.What pump receiving cartridge portion 45 formed the sealing of front surface opening and rear surface has an end rectangle tubular.The axis L3 of pump receiving cartridge portion 45 and the axis L1 of above-mentioned inlet air pathway 21 parallel (with reference to Fig. 2).The inside of pump receiving cartridge portion 45 forms the fuel chambers 46 (with reference to Fig. 3 and Fig. 4) that is used to store fuel.In fuel chambers 46, contain above-mentioned petrolift 16.Petrolift 16 forms cylindric, be comprise DYN dynamic motor part 48 and with motor part 48 concentric shapes be located at the electric fuel pump (with reference to Fig. 3) of the motor integral type of the impeller pump portion 49 on the end of motor part 48.
As shown in Figure 3, make motor part 48 forward, pump portion 49 backward with above-mentioned petrolift 16 concentric shapes and Spielpassung shape be inserted in the above-mentioned petrolift 16 of state support in the fuel chambers 46 of said pump receiving cartridge portion 45.And, the axis of petrolift 16 or basically identical consistent with axis L3.On the ear end face of pump portion 49, be provided with fuel suction portion 51 highlightedly with fuel suction port 52.Suction filter 54 is connected with fuel suction portion 51.Suction filter 54 has the filter component 55 (with reference to Fig. 4) of the bag shape that is flat.Filter component 55 and petrolift 16 are configured in the downside of petrolift 16 side by side, are used to filter the fuel that is sucked by fuel pump 16.In addition, be provided with steam exhaust port 57 on the ear end face of pump portion 49, this steam exhaust port 57 is used for and will utilizes the boost steam self-pumping portion path that fuel contained of process of pump portion 49 to be discharged in the fuel chambers 46 (with reference to Fig. 3).
On the front-end face of above-mentioned motor part 48, be provided with fuel discharge portion 59 highlightedly with fuel discharge outlet 60.In fuel discharge outlet 60, insert and be useful on the one-way valve 62 that the residual pressure that stops fuel adverse current keeps usefulness.The explanation of the high pressure fuel passage 80 that is communicated with fuel discharge outlet 60 seen below state.In addition, on the front-end face of motor part 48, be provided with electric coupler 64.Electric coupler 64 has forwards outstanding tenminal block 65.Cover the tenminal block 103 (see below and state) of 73 sides and the tenminal block 65 of electric coupler 64 is connected with this tenminal block 103 from the insertion of the place ahead relativity ground by tenminal block 65 electric coupler 64.In addition, fuel discharge portion 59 is provided with side by side with electric coupler about 64.Petrolift 16 makes impeller (the omitting diagram) rotation of pump portion 49 under the driving of motor part 48, thereby through suction filters 54 be drawn into pump portion 49 in and the pressure of this fuel be raised from fuel suction port 52 fuel in the fuel chambers 46, this fuel flows through the inside of motor part 48 and passes through one-way valves 62 from fuel exhaust port 60 and is discharged from afterwards.
As shown in Figure 4, be formed with pressure regulator valve receiving cartridge portion 67 in the upper left side of the tubular wall portion 20 of above-mentioned throttle body 12.What pressure regulator valve receiving cartridge portion 67 formed the sealing of front surface opening and rear surface has an end rectangle tubular.The axis L4 of pressure regulator valve receiving cartridge portion 67 and the axis L1 (with reference to Fig. 2) of above-mentioned inlet air pathway 21 and the axis L3 parallel (with reference to Fig. 3) of above-mentioned petrolift 16.The inside of pressure regulator valve receiving cartridge portion 67 forms the unnecessary fuel chambers 68 that is used to store unnecessary fuel.In unnecessary fuel chambers 68 so that fuel pressure regulator valve 18 contains above-mentioned fuel pressure regulator valve 18 from the state that covers 73 (see below and state) and lean out.In addition, on the rear surface of unnecessary fuel chambers 68, be formed with and be used to the projection 69 that prevents that fuel pressure regulator valve 18 from coming off.
As shown in Figure 3, on above-mentioned throttle body 12, be formed with the lid attachment face 71 of the front opening face of the front opening face that comprises said pump receiving cartridge portion 45 and above-mentioned pressure regulator valve receiving cartridge portion 67.Lid attachment face 71 is formed on the axis L12 plane orthogonal with above-mentioned Fuelinjection nozzle 14 (with reference to Fig. 2).On lid attachment face 71, utilize many suitable (among Fig. 1 being 4) bolts 74 to be equipped with and to cover 73.In addition, being used for lid 73 is installed in that the method for covering on the attachment face 71 is not limited to is bolt 74, also can be the retaining mechanism of snap-fitted modes such as (snap fit).In addition, lid 73 for example is formed from a resin.The fuel chambers 46 of the above-mentioned throttle body 12 of 73 sealings and the front opening face (with reference to Fig. 3) of unnecessary fuel chambers 68 are covered in utilization.In addition, on lid 73, be formed with and 71 attachment faces that contact 75 of lid attachment face.In addition, also can utilize except that with the axis L2 plane orthogonal of above-mentioned Fuelinjection nozzle 14, the plane that intersects with this axis L2 forms the lid attachment face 71 of throttle body 12 and the attachment face 75 that covers 73.In addition, as shown in Figure 3, on the attachment face 75 of above-mentioned lid 73, be formed with the ring-type bar groove (omission reference character) of the front opening face that centers on above-mentioned fuel chambers 46 and the ring-type bar groove (omission reference character) that centers on the front opening face of above-mentioned unnecessary fuel chambers 68. Seal ring 77,78 as the sealing component that seals between the lid attachment face 71 that is used for attachment face 75 and throttle body 12 is installed in 2 bar grooves.
In above-mentioned lid 73, be formed with along the high pressure fuel passage 80 of the open circles tubular of left and right directions extension.The right side sealing of high pressure fuel passage 80, the left side opening.On the left end opening surface of high pressure fuel passage 80, be formed with bore and become big open pore portion 81.Utilize the inside of cap 83 sealing open pore portions 81.Cap 83 forms with the level cylindric, and path columnar portion (omission reference character) is inserted in the left part of high pressure fuel passage 80.O RunddichtringO 84 as the sealing component that seals between the peripheral wall surfaces that is used for path columnar portion and high pressure fuel passage 80 is installed in the annular slot on the outer circumferential face that is formed at this path columnar portion (omission reference character).
As shown in Figure 2, in above-mentioned lid 73, be formed with the low-pressure fuel path 87 of the open circles tubular that extends along left and right directions (among Fig. 2 in the paper of paper outside the paper direction).Low-pressure fuel path 87 is adjacent with the upside of above-mentioned high pressure fuel passage 80, and is the configuration of shape arranged side by side ground with high pressure fuel passage 80.The sealing of the right side of low-pressure fuel path 87, the left side is at above-mentioned open pore portion 81 inner openings.Open pore portion 81 is equivalent to the opening portion of low-pressure fuel path 87, and is sealed by above-mentioned cap 83 (with reference to Fig. 3).That is, the big footpath columnar portion (omission reference character) of cap 83 is entrenched in the open pore portion 81 of low-pressure fuel path 87.O RunddichtringO 85 as the sealing component that seals between the wall that is used for the open pore portion 81 of big footpath columnar portion and low-pressure fuel path 87 is installed in the groove with the level (omission reference character) of the right part that is formed at this big footpath columnar portion.In addition, be installed on the above-mentioned throttle body 12, can utilize to be located on the throttle body 12 and the wall portion 88 relative with the left side of cap 83 prevents that cap 83 from coming off along with covering 73.
As shown in Figure 2, be formed with injection valve connecting cylinder cylindraceous portion 89 on the central part of the attachment face 75 of above-mentioned lid 73, this injection valve connecting cylinder portion 89 has the injection valve connection mouth 90 that is communicated with the central part of above-mentioned high pressure fuel passage 80.Be installed on the above-mentioned throttle body 12 and with the fuel introduction part 40 relativities ground of above-mentioned Fuelinjection nozzle 14 and with one heart in the shape ground insertion injection valve connecting cylinder portion 89 along with covering 73.Thus, the fuel introducing port 41 of Fuelinjection nozzle 14 is practised physiognomy with the path wall of high pressure fuel passage 80 and is communicated with this high pressure fuel passage 80 over the ground.O RunddichtringO 91 as the sealing component that is used for sealing between fuel introduction part 40 and the injection valve connecting cylinder portion 89 is installed in the groove with the level on the outer circumferential face of the fuel introduction part 40 that is formed at Fuelinjection nozzle 14 (omission reference character).
As shown in Figure 1, on the central part of the front surface of above-mentioned lid 73, be adjacent to be concaved with tetragonal control gear accommodation section 93 (with reference to Fig. 2) with above-mentioned high pressure fuel passage 80 and above-mentioned low-pressure fuel path 87.In control gear accommodation section 93, contain electric control device 95.At least one side of electric control device that the pump controller and being used to of driving (rotating speed) that is used for controlling the motor part 48 of petrolift 16 is controlled the fuel injection amount of Fuelinjection nozzle 14 is equivalent to electric control device 95.The cover plate 97 that seals electric control device 95 by the opening of sealing control gear accommodation section 93 is installed on control gear accommodation section 93.In addition, also can utilize the embedding part to replace cover plate 97 sealing electric control devices 95.
As shown in Figure 3, on the right part of the attachment face 75 of above-mentioned lid 73, be formed with the pump connection mouth 99 of the open circles tubular that is communicated with the right part of above-mentioned high pressure fuel passage 80.Pump connection mouth 99 is (top among Fig. 3) opening rearward.Be installed on the above-mentioned throttle body 12 and with the fuel discharge portion 59 relativities ground of above-mentioned petrolift 16 and be inserted in the pump connection mouth 99 with one heart along with covering 73 shape.Thus, the fuel discharge outlet 60 of petrolift 16 is communicated with this high pressure fuel passage 80 in the face of ground with the wall of high pressure fuel passage 80.In addition, O RunddichtringO 100 as the sealing component that is used for sealing between the peripheral wall surfaces with fuel discharge portion 59 and pump connection mouth 99 is installed in the groove with the level on the outer circumferential face of the fuel discharge portion 59 that is formed at petrolift 16 (omission reference character).
On the right part of the attachment face 75 of above-mentioned lid 73, the electric coupler 102 with tenminal block 103 is located at the right side of said pump connection mouth 99 side by side.Electric coupler 102 is (top among Fig. 3) opening rearward.Be installed on the above-mentioned throttle body 12 and with the tenminal block 65 relativities ground of the electric coupler 64 of above-mentioned petrolift 16 and be inserted in the tenminal block 103 of electric coupler 102 with one heart along with covering 73 shape.Thus, 2 tenminal blocks 65,103 are electrically connected.In addition, on the left surface of lid 73, be provided with electric coupler 105.To insert electric coupler 105 and electric coupler 105 is connected with this aerial lug from left with the aerial lug that the electric control device (ECU) of not shown outside is electrically connected.In addition, be embedded with the tenminal block 103 that is used for tenminal block 106, above-mentioned electric control device 95 and the above-mentioned electric coupler 102 of electric coupler 105 in 73 at lid and be electrically connected the conductive member (omitting diagram) that gets up.
As shown in Figure 1, on the lower right part of the front surface of above-mentioned lid 73, be provided with feeder sleeve (feed pipe) 108 (with reference to Fig. 2) highlightedly with fuel inflow entrance 109.Fuel inflow entrance 109 is communicated with the underpart of the fuel chambers 46 of above-mentioned throttle body 12.In addition, with not shown fuel pot in the piping-member used of the fuel supply that is communicated with of bottom be connected with feeder sleeve 108.Therefore, the piping-member that the fuel in the fuel pot is used by fuel supply flows in the fuel chambers 46 in the mode that flows downward naturally from the fuel inflow entrance 109 of feeder sleeve 108.In addition, fuel pot is configured in than fuel injection system 10 more by on the position (higher position) of top.
As shown in Figure 3, on the right part of the attachment face 75 of above-mentioned lid 73, be formed with connecting port 110 cylindraceous.Connecting port 110 is (top among Fig. 3) opening rearward.Connecting port 110 forms with above-mentioned petrolift 16 concentric shape ground.In addition, connecting port 110 forms dual ring-type with respect to all sides of the sealing gasket 77 on above-mentioned right side within it.Be installed on the above-mentioned throttle body 12 and connecting port 110 is communicated with fuel chambers 46 along with covering 73.In addition, the right part of above-mentioned low-pressure fuel path 87 is communicated with connecting port 110.
As shown in Figure 1, the upper right quarter at the front surface of above-mentioned lid 73 is provided with reflow pipe (return pipe) 112 (with reference to the Fig. 2) with fuel outflow opening 113 highlightedly.Fuel outflow opening 113 is communicated with (with reference to Fig. 3) with the right part of above-mentioned low-pressure fuel path 87.In addition, with not shown fuel pot in the piping-member of the backflow usefulness that is communicated with of gas phase portion be connected with reflow pipe 112.Therefore, with fuel path that fuel chambers 46, unnecessary fuel chambers 68, low-pressure fuel path 87 etc. are communicated with in the steam that produces utilize self buoyancy force to the end face of path and along this end face, to flow, spontaneous combustion materials flow outlet 113 piping-members through the backflow usefulness are discharged in the gas phase portion in the fuel pot then.
As shown in Figure 3, be formed with pressure regulator valve installation tube cylindraceous portion 115 on the left part of the attachment face 75 of above-mentioned lid 73, this pressure regulator valve installation tube portion 115 has the pressure regulator valve connection mouth 116 that is communicated with the left part of above-mentioned high pressure fuel passage 80.Pressure regulator valve connection mouth 116 is opening rearward.It is that path hole portion, rear portion are with the level poroid for big directly hole portion that pressure regulator valve connection mouth 116 forms anterior.In addition, on the peripheral part of pressure regulator valve installation tube portion 115, be formed with refluxing opening 118 cylindraceous.Refluxing opening 118 is (top among Fig. 3) opening rearward.Refluxing opening 118 forms with above-mentioned pressure regulator valve connection mouth 116 concentric shape ground.In addition, refluxing opening 118 forms dual ring-type with respect to all sides of the seal ring 78 in above-mentioned left side within it.In addition, the left part of above-mentioned low-pressure fuel path 87 is communicated with the upper lateral part of refluxing opening 118.In addition, the rear portion of pressure regulator valve installation tube portion 115 is rearward outstanding from attachment face 75.In addition, be inserted in the big footpath hole portion of pressure regulator valve connection mouth 116 above-mentioned fuel pressure regulator valve 18 and pressure regulator valve connection mouth 116 concentric shapes.
The fuel pressure regulator valve that above-mentioned fuel pressure regulator valve 18 is relief valve formulas, and be cylindric, this fuel pressure regulator valve 18 at one end has fuel introducing port 120 on the face (front-end face), has unnecessary fuel discharge outlet 121 on other end (ear end face).The pressure of the fuel that fuel pressure regulator valve 18 will be supplied with from fuel introducing port 120 is adjusted to authorized pressure, discharges unnecessary unnecessary fuel from unnecessary fuel discharge outlet 121.By fuel introducing port 120 is communicated with this high pressure fuel passage 80 in the face of ground with the wall of above-mentioned high pressure fuel passage 80.In addition, O RunddichtringO 122 as the sealing component that seals between the peripheral wall surfaces with fuel pressure regulator valve 18 and pressure regulator valve connection mouth 116 is installed in the groove with the level on the outer circumferential face of the rearward end that is formed at fuel pressure regulator valve 18 (omission reference character).In addition, be installed on the above-mentioned throttle body 12 and the rear gap of pressure regulator valve installation tube portion 115 is inserted in the unnecessary fuel chambers 68 in the above-mentioned pressure regulator valve receiving cartridge portion 67 ordinatedly along with covering 73.Thus, fuel pressure regulator valve 18 can be housed in the unnecessary fuel chambers 68, and utilize projection 69 to prevent that fuel pressure regulator valve 18 from coming off.In addition, the unnecessary fuel discharge outlet 121 of fuel pressure regulator valve 18 is communicated with unnecessary fuel chambers 68.In addition, refluxing opening 118 is communicated with unnecessary fuel chambers 68.And, the axis of fuel pressure regulator valve 18 or basically identical consistent with axis L4.
Next the action of above-mentioned fuel injection system 10 is described.The piping-member that fuel in the fuel pot is used through fuel supply flows in the fuel chambers 46 in the mode that flows downward naturally from the fuel inflow entrance 109 of feeder sleeve 108.The motor part 48 of driving fuel pump 16, thereby the impeller rotation that then makes pump portion 49 through suction filters 54 is drawn into pump portion 49 in and the pressure of this fuel be raised from fuel suction port 52 fuel in the fuel chambers 46, and this fuel flows through the inside of motor part 48 and passes through one-way valves 62 from fuel exhaust port 60 and is discharged from afterwards.This fuel under high pressure self-pumping connection mouth 99 that is discharged from is through high pressure fuel passage 80 and self-injection valve connection mouth 90 is fed in the fuel introducing port 41 of Fuelinjection nozzle 14 and from pressure regulator valve connection mouth 116 and is fed in the fuel introducing port 120 of fuel pressure regulator valve 18.
Utilize the driving of Fuelinjection nozzle 14 will be directed to fuel under high pressure in the above-mentioned Fuelinjection nozzle 14 in fuel spray-hole 37 is ejected into inlet air pathway 21.In addition, the pressure that utilizes fuel pressure regulator valve 18 will be fed into the fuel in the Fuelinjection nozzle 14 is adjusted to the pressure of regulation.Promptly, during greater than authorized pressure, utilize the action that is built in the relief valve in the fuel pressure regulator valve 18 to make fuel pressure regulator valve 18 drive valve, at the pressure of fuel thus with unnecessary fuel in unnecessary fuel discharge outlet 121 is discharged to unnecessary fuel chambers 68.This unnecessary fuel turns back in the fuel chambers 46 through low-pressure fuel path 87 and connecting port 110 from refluxing opening 118 then.In addition, be authorized pressure when following at the pressure of fuel, the pressure in the high pressure fuel passage 80 are remained the fuel pressure of regulation by making fuel pressure regulator valve 18 close valve.In addition, with fuel path that fuel chambers 46, unnecessary fuel chambers 68, low-pressure fuel path 87 etc. are communicated with in the steam that produces utilize self buoyancy force to the end face of path and along this end face, to flow, spontaneous combustion materials flow outlet 113 is discharged to through the piping-member of backflow usefulness in the gas phase portion in the fuel pot then.In addition, when fuel injection system 10 was quit work, one-way valve 62 and fuel pressure regulator valve 18 closed valve, were so-called residual pressure thereby can keep fuel pressure in high pressure fuel passage 80.Thus, can be suppressed at generation steam in the high pressure fuel passage 80, restarting property of raising.
If adopt above-mentioned fuel injection system 10, then be (with reference to the Fig. 4) that disposes petrolifts 16 with the tubular wall portion 20 shape ground arranged side by side of throttle body 12.Thus, the weight thing can be reduced and be the amount of exposing with respect to tubular wall portion 20 (particularly with respect to the vertical guide P1 of the axis L2 of axis L1 that comprises inlet air pathway 21 and Fuelinjection nozzle 14 the amount of exposing to the right) of petrolift 16, thereby the miniaturization of fuel injection system 10 can be realized.And then, can improve lift-launch property to the fuel injection system 10 of the narrow space of two-wheel vehicle.In addition, dispose petrolift 16 and fuel pressure regulator valve 18 dividually by the direction (left and right directions) of intersecting along orientation (vertical direction) with the tubular wall portion 20 of throttle body 12 and Fuelinjection nozzle 14, can improve weight balancing, improve vibration resistance for engine luggine.
In addition, make Fuelinjection nozzle 14 between petrolift 16 and fuel pressure regulator valve 18, be set up in parallel petrolift 16 and fuel pressure regulator valve 18 (with reference to Fig. 4).Thereby, can make Fuelinjection nozzle 14 between petrolift 16 and fuel pressure regulator valve 18, concentrate petrolift 16 and fuel pressure regulator valve 18.This kind configuration mode can be realized the miniaturization of fuel injection system 10 effectively and improve vibration resistance for engine luggine.
In addition, fuel injection system 10 has the high pressure fuel passage 80 of direction (left and right directions) extension that intersects along the orientation (vertical) with the tubular wall portion 20 of throttle body 12 and Fuelinjection nozzle 14, and the fuel introducing port 120 of the fuel introducing port 41 of the fuel discharge outlet 60 of petrolift 16, Fuelinjection nozzle 14 and fuel pressure regulator valve 18 is to be communicated with (with reference to Fig. 3) with mode that the path wall of above-mentioned high pressure fuel passage 80 is faced with this high pressure fuel passage 80.Thereby, can shorten the path-length of high pressure fuel passage 80, and can simplify access structure, thereby can reduce the risk of fuel leak.In addition, can shorten from petrolift 16 by the path-length that shortens high pressure fuel passage 80 and start working pressure rising time of the fuel pressure that reaches regulation.Therefore, can omit the residual pressure that is provided with in the petrolift 16 and keep the one-way valve 62 of usefulness, thereby can reduce cost.In addition, the oily close state in the time of also can relaxing (reduction) and be used to remain on Fuelinjection nozzle 14 and fuel pressure regulator valve 18 and close valve, valve body and closing of valve seat grind required machining accuracy, thereby can reduce cost.In addition,, therefore high pressure hose need not be set, can reduce cost by forming high pressure fuel passage 80 thus owing in lid 73, be formed with high pressure fuel passage 80.
In addition, fuel injection system 10 also comprises the fuel chambers 46 that is used for accommodating petrolift 16 and stores fuel, is used to accommodate fuel pressure regulator valve 18 and stores the unnecessary fuel chambers 68 of the unnecessary fuel of discharging from fuel pressure regulator valve 18 and is used to make unnecessary fuel unnecessary fuel chambers 68 in to turn back to the low-pressure fuel path 87 of fuel chambers 46, and disposes low-pressure fuel path 87 (with reference to Fig. 2 and Fig. 3) with high pressure fuel passage 80 shape ground arranged side by side.Thereby, can be easy in low-pressure fuel path 87, handle.
In addition, fuel injection system 10 also comprises the fuel discharge outlet 60 with petrolift 16, the high pressure fuel passage 80 that the fuel introducing port 41 of Fuelinjection nozzle 14 and the fuel introducing port of fuel pressure regulator valve 18 120 are communicated with, the fuel chambers 46 that is used to accommodate petrolift 16 and stores fuel, the unnecessary fuel chambers 68 that is used to accommodate fuel pressure regulator valve 18 and stores the unnecessary fuel of discharging from fuel pressure regulator valve 18, be used for making the unnecessary fuel of unnecessary fuel chambers 68 to turn back to low-pressure fuel path 87 in the fuel chambers 46, with at least one side's who is used for controlling petrolift 16 and Fuelinjection nozzle 14 electric control device 95, and be adjacent to dispose electric control device 95 (with reference to Fig. 1 and Fig. 2) with high pressure fuel passage 80 and low-pressure fuel path 87.Thereby, can utilize in high pressure fuel passage 80 flow fuel under high pressure and the low-pressure fuel cool electronic control gear 95 that in low-pressure fuel path 87, flows.
The present invention is not limited to the foregoing description, can change in the scope that does not break away from purport of the present invention.For example, the present invention is except being used in the two-wheel vehicle, also be suitable as fuel injection system in the vehicles such as automobile, all-terrain vehicle.In addition, in the above-described embodiments, petrolift 16 is configured in the right side, fuel pressure regulator valve 18 is configured in the left side, but also can disposes on the contrary, that is, petrolift 16 is configured in the left side, fuel pressure regulator valve 18 is configured in the right side.In addition, as long as direction (left and right directions) the separate configuration petrolift 16 and the fuel pressure regulator valve 18 that intersect along orientation (vertical) with the tubular wall portion 20 of throttle body 12 and Fuelinjection nozzle 14, for example petrolift 16 is not limited to be configured in the upper right side of the tubular wall portion 20 of throttle body 12, also can be configured in right side or right lower side, and fuel pressure regulator valve 18 also is not limited to the upper left side of the tubular wall portion 20 that is configured in throttle body 12, also can be configured in left side or lower-left side.In addition, the axis of the tubular wall portion 20 of the axis L4 of the axis L3 of petrolift 16 and/or Fuelinjection nozzle 18 and throttle body 12 also can not be a shape arranged side by side.In addition, in the above-described embodiments,, but also can suitably change the direction that this is set up in parallel along the tubular wall portion 20 and the Fuelinjection nozzle 14 of vertical configuration section air door body 12 arranged side by side.In addition, can based on fuel pump 16 and the configuration relation of fuel pressure regulator valve 18 change high pressure fuel passage 80 and low-pressure fuel path 87.In addition, in the above-described embodiments, be adjacent to dispose electric control device 95, but also can be adjacent to dispose electric control device 95 with any one party in high pressure fuel passage 80 and the low-pressure fuel path 87 with high pressure fuel passage 80 and low-pressure fuel path 87.
Claims (5)
1. a fuel injection system is characterized in that,
This fuel injection system comprises integratedly:
Throttle body, it has the tubular wall portion that is used to form inlet air pathway;
Fuelinjection nozzle, it is used for burner oil in above-mentioned inlet air pathway;
Petrolift, it is used for supplying fuel to above-mentioned Fuelinjection nozzle;
The fuel pressure regulator valve, it is used for adjusting the fuel pressure that is fed into above-mentioned Fuelinjection nozzle;
The tubular wall portion of above-mentioned petrolift and above-mentioned throttle body shape arranged side by side ground is disposed;
The direction of intersecting along the orientation with the tubular wall portion of above-mentioned throttle body and above-mentioned Fuelinjection nozzle disposes above-mentioned petrolift and above-mentioned fuel pressure regulator valve dividually.
2. fuel injection system according to claim 1 is characterized in that,
Make above-mentioned Fuelinjection nozzle between above-mentioned petrolift and above-mentioned fuel pressure regulator valve, dispose above-mentioned petrolift and above-mentioned fuel pressure regulator valve side by side.
3. fuel injection system according to claim 1 and 2 is characterized in that,
This fuel injection system has high pressure fuel passage, the direction extension that this high pressure fuel passage is intersected along the orientation with the tubular wall portion of above-mentioned throttle body and above-mentioned Fuelinjection nozzle;
The fuel introducing port of the fuel discharge outlet of above-mentioned petrolift, above-mentioned Fuelinjection nozzle and the fuel introducing port of above-mentioned fuel pressure regulator valve are to be communicated with this high pressure fuel passage with mode that the path wall of above-mentioned high pressure fuel passage is faced.
4. fuel injection system according to claim 3 is characterized in that,
This fuel injection system comprises:
Fuel chambers, it is used to accommodate above-mentioned petrolift and stores fuel;
Unnecessary fuel chambers, it is used to accommodate above-mentioned fuel pressure regulator valve and stores the unnecessary fuel of discharging from the fuel pressure regulator valve;
The low-pressure fuel path, it is used for making the unnecessary fuel in the above-mentioned unnecessary fuel chambers to turn back to above-mentioned fuel chambers;
With above-mentioned low-pressure fuel path and the configuration of above-mentioned high pressure fuel passage shape arranged side by side ground.
5. fuel injection system according to claim 1 and 2 is characterized in that,
This fuel injection system comprises:
High pressure fuel passage, it is communicated with the fuel introducing port of the fuel discharge outlet of above-mentioned petrolift, above-mentioned Fuelinjection nozzle and the fuel introducing port of above-mentioned fuel pressure regulator valve;
Fuel chambers, it is used to accommodate above-mentioned petrolift and stores fuel;
Unnecessary fuel chambers, it is used to accommodate above-mentioned fuel pressure regulator valve and stores the unnecessary fuel of discharging from the fuel pressure regulator valve;
The low-pressure fuel path, it is used for making the unnecessary fuel of above-mentioned unnecessary fuel chambers to turn back in the above-mentioned fuel chambers;
Electric control device, it is used for controlling at least one side of above-mentioned petrolift and above-mentioned Fuelinjection nozzle;
At least one side of above-mentioned electric control device and above-mentioned high pressure fuel passage and above-mentioned low-pressure fuel path is adjacent to configuration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-159668 | 2009-07-06 | ||
| JP2009159668A JP5329321B2 (en) | 2009-07-06 | 2009-07-06 | Fuel injection device |
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| Publication Number | Publication Date |
|---|---|
| CN101943095A true CN101943095A (en) | 2011-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102200112A Pending CN101943095A (en) | 2009-07-06 | 2010-07-06 | Fuel injection system |
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| Country | Link |
|---|---|
| JP (1) | JP5329321B2 (en) |
| CN (1) | CN101943095A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104066967A (en) * | 2012-01-19 | 2014-09-24 | 株式会社三国 | Fuel injection device for internal combustion engine |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012225292A (en) | 2011-04-21 | 2012-11-15 | Keihin Corp | Fuel feeder of engine |
| JP5968628B2 (en) * | 2012-01-19 | 2016-08-10 | 株式会社ミクニ | Fuel supply device for internal combustion engine |
| JP2015040516A (en) * | 2013-08-22 | 2015-03-02 | 株式会社デンソー | Cooling structure for drive device |
| JP2015083797A (en) * | 2013-10-25 | 2015-04-30 | 株式会社デンソー | Driving device |
| JP6109260B2 (en) * | 2015-07-24 | 2017-04-05 | 株式会社ケーヒン | Fuel supply device |
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|---|---|
| JP2011012649A (en) | 2011-01-20 |
| JP5329321B2 (en) | 2013-10-30 |
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Application publication date: 20110112 |