CN1512055A

CN1512055A - Fuel Supply Structure for Small Vehicle Engines

Info

Publication number: CN1512055A
Application number: CNA200310118128XA
Authority: CN
Inventors: ��｡һ; 池田健一郎
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2002-12-02
Filing date: 2003-11-25
Publication date: 2004-07-14
Anticipated expiration: 2023-11-25
Also published as: TW200415306A; ITTO20030892A1; JP3923420B2; JP2004183538A; TWI235199B; ES2264592B1; KR20040048302A; CN100357589C; KR100578011B1; ES2264592A1

Abstract

A fuel supply structure for a small vehicle engine, which is to connect an air intake pipe connected to the air intake port of the cylinder head on the engine cylinder head and install a fuel injection pipe to the air intake port on the air intake pipe or the cylinder head Small vehicles with injection valves; the fuel joint (33) has a connecting pipe portion (33a) that connects the fuel pipe (79) that introduces fuel to the fuel injection valve (32), and the fuel joint will be connected to the connecting pipe portion ( 33a) The circumferential position of the fuel injection valve (32) is fixed, and the head of the fuel injection valve (32) is liquid-tightly fitted, and the position relative to the intake port (31) is fixed, and at the same time It is connected to the intake pipe (29) so that the fuel injection valve (32) is sandwiched between the intake pipe (29). The mounting reliability of the fuel injection valve and the fuel pipe can be improved when fuel is supplied to a single-cylinder engine or when fuel is independently supplied to each cylinder of a multi-cylinder engine.

Description

The fuel supply structure of small vehicle motor

Technical field

The present invention relates to a kind of on the cylinder head that is loaded into the motor on the vehicle body frame and be connected on the intakeport of this cylinder head and connect sucking pipe, dilly from the Fuelinjection nozzle of burner oil to described intakeport that supply with is installed on sucking pipe or cylinder head, is related in particular to the improvement of engine fuel supply structure.

Background technique

Loading on the dillies such as motor bike of multiple cylinder engine, on fuel rail, connected the structure (for example with reference to patent documentation 1) as everyone knows of the head of each cylinder fuel injection valve jointly.

Patent documentation 1: special public clear 60-45751 communique

Yet, when motor is single cylinder or the time,, be difficult to guarantee the installation reliability of Fuelinjection nozzle and fuel pipe if former state ground uses above-mentioned existing fuel supply structure to each cylinder independence fueling of multiple cylinder engine.

Summary of the invention

The present invention In view of the foregoing, it is a kind of to the single cylinder engine fueling time or to each cylinder independence fueling of multiple cylinder engine the time that its purpose is to provide, and makes the fuel supply structure of the small vehicle motor that the installation reliability of Fuelinjection nozzle and fuel pipe is improved.

In order to reach described purpose, the present invention's 1 described invention, be on the cylinder head that is loaded into the motor on the vehicle body frame, the sucking pipe that connection links to each other with the intakeport of this cylinder head, and dilly to the Fuelinjection nozzle of described intakeport burner oil is installed on sucking pipe or cylinder head, it is characterized in that: the fuel joint, have the fuel pipe that will import fuel and be connected splicing sleeve portion on the described Fuelinjection nozzle, this fuel joint, to be decided to be necessarily and chimeric with liquid sealing with respect to the Zhou Fangxiang position of the described Fuelinjection nozzle of described splicing sleeve portion, and will be decided to be with respect to the position of described intakeport necessarily at the head of described Fuelinjection nozzle, simultaneously with and described sucking pipe or cylinder head between the mode of the described Fuelinjection nozzle of clamping be linked on described sucking pipe or the cylinder head.

The 1 described formation according to the present invention, will be with the chimeric fuel joint of liquid sealing on the head of Fuelinjection nozzle, with and cylinder head or sucking pipe between the mode of clamping Fuelinjection nozzle be linked on cylinder head or the sucking pipe, with this, to be decided to be necessarily for the relative position of the Fuelinjection nozzle of intakeport and for the relative position of the fuel injection pipe of Fuelinjection nozzle, can on sucking pipe or cylinder head, Fuelinjection nozzle be installed, the Fuelinjection nozzle when improving when supplying with single cylinder engine fuel or on each cylinder of multiple cylinder engine independent fueling and the installation reliability of fuel pipe.

In addition, the present invention's 2 described inventions, be on the basis that constitutes of the invention of record in the present invention 1, has following feature, one end of the fuel pipe dunnage of extending along the described fuel pipe that is connected in the described splicing sleeve portion, be linked on described sucking pipe or the cylinder head by tightening jointly by a plurality of bolts and described fuel joint, and in the other end of described fuel pipe dunnage, support described fuel pipe, according to such formation, both can avoid the increase of amount of parts, also can reduce the vibration of fuel pipe.

And then, the present invention's 3 described inventions, be to put down in writing on the basis of invention formation in the present invention 1 or 2, has following feature, comprise described motor and with the variable-speed motor that transmits to trailing wheel behind the output variable speed of this motor, and described trailing wheel is bearing in the front portion of the power plant at rear portion by axle, can be supported on the vehicle body frame with fluctuating, on the fuel tank that is loaded on this vehicle body frame, connect described fuel pipe, according to such formation, can be so that fuel pipe shake with power plant, so motor also can shake, and the Fuelinjection nozzle that is loaded on the dilly on the vehicle body frame is installed easily.

Description of drawings

Fig. 1 is a steamboat motor bike side view.

Fig. 2 be omitted arrow 2 among Fig. 1 of the hood-like attitude of car body to view.

Fig. 3 be among Fig. 2 arrow 3 to view.

Fig. 4 is the enlarged view of the major component of Fig. 2.

Fig. 5 is with the throttle body device side view that arrow 5 directions are seen from Fig. 4.

Fig. 6 is the plan view in the cross section of throttle body device.

Fig. 7 is the side view that a fuel pipe part is cut open.

Fig. 8 is the side view in longitudinal section of assembly department that amplifies the sucking pipe of expression Fuelinjection nozzle.

Fig. 9 be among Fig. 8 arrow 9 to view.

Among the figure: 11-vehicle body frame, 29-sucking pipe, 30-cylinder head, 31-intakeport, 32-Fuelinjection nozzle, 33-fuel joint, 33a-splicing sleeve portion, 68-fuel tank, 79-fuel pipe, 83-fuel pipe dunnage, the 98-bolt, E-motor, M-speed changer, P-power plant, WR-trailing wheel.

Embodiment

Below with regard to embodiments of the present invention, in conjunction with the accompanying drawings shown in one embodiment of the invention be illustrated.

Fig. 1～9 expression one embodiment of the present of invention, Fig. 1 is the side view of small-sized two-wheel Motor Vehicle, Fig. 2 be omitted arrow 2 among Fig. 1 of the hood-like attitude of car body to view, Fig. 3 be among Fig. 2 arrow 3 to view, Fig. 4 is the enlarged view of the major component of Fig. 2, Fig. 5 is with the throttle body device side view that arrow 5 directions are seen from Fig. 4, Fig. 6 is the plan view in the cross section of throttle body device, Fig. 7 is the side view that a fuel pipe part is cut open, Fig. 8 is the side view in longitudinal section of assembly department that amplifies the sucking pipe of expression Fuelinjection nozzle, Fig. 9 be among Fig. 8 arrow 9 to view.

At first in Fig. 1 and Fig. 2, vehicle body frame 11 as the small-sized two-wheel Motor Vehicle of dilly, have: but the preceding pipe 13 from the front fork 12 direction of operating ground with axle supporting front-wheel WF are supported, with the falling tube 14 that extends to the rear lower side, with the last square tube 15 of extending to the rear lower side with the angle that slowly tilts than described falling tube 14 from described falling tube 14 tops, be connected with the rear portion of last square tube 15 with front end and be provided with and extend to the back upper place, simultaneously the rear end manages 16 after by interconnective pairing left and right, 16, be connected the underpart of described falling tube 14 with front end, rear end and described two backs manage 16 simultaneously, the following

square tube

17,17 of the pairing left and right that 16 intermediate portion connects; Two following

square tubes

17,17 are seen as the open upward roughly U word shape that bends to from the side.

Intermediate portion at the fore-and-aft direction of described vehicle body frame 11, the twelve Earthly Branches that can fluctuate are contracted to draw together and are made cylinder-bore axis tilt and be configured in the single cylinder engine E in the place ahead of trailing wheel WR to the front upper place, front portion with the power plant P of the stepless speed variator M that the output of this motor E is carried out send to after the stepless change trailing wheel WR, described trailing wheel WR, in the rear portion of power plant P, and between the rearward end of vehicle body frame 11 and described power plant P, be provided with rear portion vibration damping equipment 20 by axle.

With reference to Fig. 3, be provided with in the portion at described two

back pipes

16,16 and with the described connection of

square tube

17,17 down, be fixed with upper bracket 21 respectively ...On the other hand, fixing pairing left and right lower tray 23 on the top of the crankcase 22 of motor E ..., be connected in upper bracket 21 ... two end part motor suspension rod 24 shake strong point SP place, can joltily support the carriage 23 of described two bottoms ...That is, crankcase 22 tops on the motor E of power plant P front portion can joltily be supported on the vehicle body frame 11.

With reference to Fig. 4, above the stepless speed variator M of trailing wheel WR left side, disposing the air-strainer 25 that supports by this stepless speed variator M, the air that is purified with this filter cleaner 25 is connected on the throttle body device 27 by connecting tube 26, this throttle body device 27, elasticity connecting cylinder 28 by rubber system is connected and curves sucking pipe 29 upstream extremities that slightly are the U font, the downstream of sucking pipe 29, with by along the approximate centre position of motor E left and right directions, the mode that is arranged on the intakeport 31 on the cylinder head 30 is connected on this cylinder head 30.

And, be entrenched in the top of sucking pipe 29 to the bottom of the Fuelinjection nozzle 32 of intakeport 31 burner oils, and Fuelinjection nozzle 32 is through Fuelinjection nozzles 32 and be sandwiched between the fuel joint 33 and described sucking pipe 29 that is connected on the described sucking pipe 29.

In Fig. 5 and Fig. 6, throttle body device 27 comprises: the body 36 with the air intake passage 35 on the intakeport 31 of the cylinder head 30 that is connected in described motor E, with have the approximate horizontal axis and cross described air intake passage 35 and be rotatably supported in valve shaft 37 on the described body 36, flow through the gettering quantity of air intake passage 35 with adjusting and in air intake passage 35, be fixed in the bultterflythrottle 38 on the valve shaft 37 and be fixed in closure drum 39 on valve shaft 37 1 ends in the foreign side of described body 36.

Closure drum 39, be with towards direct of travel the place ahead state configuration of motor bike in the mechanism of the right side side of body 36, between this closure drum 39 and body 36, be provided with to the Returnning spring 40 of closing the described closure 38 side application of forces, the closure cable 41 on the closure drum 39 is hung, is connected to volume, by the put up a resistance draw operations of elastic force of described Returnning spring 40 of the driver who drives motor bike, to closure 38 to the open side rotating drive.

For described body 36, with closure drum 39 opposition sides, promptly the left side is equipped with the control box 43 of the control unit 42 of the running control of taking in the motor E that is used to carry out fuel injection amount and ignition timing etc.

Control box 43 by casing 44 and the opening portion by sealing described casing 44, together tighten 45 on the lid that is connected on the body 36 with casing 44 and form, described control unit 42 is included in electronic circuit on the circuit substrate 46 that is contained, is fixed in the control box 43, not shown in the figures.

On described circuit substrate 46, connecting the aperture that detects closure 38, the throttle sensor 47 that is connected with valve shaft 37 1 ends, simultaneously, upstream side at closure 38, be connected with the inhalation temperature sensor 48 that detects the inhalation temperature in the air intake passage 35, and then, not shown, the negative pressure in the air intake passage 35 in closure downstream side also is connected on the described circuit substrate 46 as the pressure of inspiration(Pi) sensor that pressure of inspiration(Pi) detects.

The top of the casing 44 in described control box 43, be integrally formed with and cross over body 36 tops, towards the connector portion 49 of closure drum 39 sides, be connected in multiple conducting wires 51 on the control unit 42 at needs ... the aerial lug 50 of last connection releasably is installed in the described connector portion 49 from closure drum 39 sides.And each lead 51 ... be grouped into wire harness 52, this wire harness 52 forwards extends from the aerial lug 50 that is installed in the connector portion 49, and then is inverted to roughly U font on the right side as shown in Figure 4.

On described body 36, the lead 51 with connection on aerial lug 50 is installed ... and the protecting component 53 of the partition board portion 53a between the closure drum 39.Described partition board portion 53a, be formed along the direction that is installed in the aerial lug 50 in the described connector portion 49 extend tabular, on this dividing plate 53a, be provided with the visual window 54 of the coiling situation that is used for to confirm the closure cable 41 of reeling to closure drum 39 from the top.

But; closure cable 41 is made up of the outer layer line 55 and the interior layer line 56 of passing movably in the layer line 55 outside this; one end of the interior layer line 56 of drawing from an end of outer layer line 55 is reeled, is connected on the closure drum 39, is used for cable supporting portion 53b and described guard block 53 formation one with an end positioning support of outer layer line 55.

Described cable supporting portion 53b is provided with breach 64, the supporting drum 58 that the outside has male thread 57 is inserted in the breach 64, from the both sides of cable supporting portion 53b, by a pair of

nut

59,60 that is threadedly connected on the described male thread 57, supporting drum 58 is fixed on the 53b of cable supporting portion.An end of layer line 55 outside the external bracing of this supporting drum 58 is drawn and a mobile end that runs through the interior layer line 56 of supporting drum 58 freely from an end of outer layer line 55, extends in closure drum 39 1 sides.

Such closure cable 41 extends towards the place ahead from affiliated cable supporting portion 53b with upwards lifting forward, corresponding to throttle body device 27 parts, and closure cable 41 and the lead 51 that is connected on the described control unit 42 ..., be configured to mutual reverse extension.

Described guard block 53 is positioned by locating stud 61 on the body 36 of throttle body device 27, simultaneously, uses single threaded part 62 to be tightened against on the body 36.And in closure cable 41, be disposed at the part between cable supporting portion 53b and the closure drum 39; threaded part 62 is disposed at an opposite side with described dividing plate 53a and guard block 53 is connected on the position of body 36, locating stud 61 is between threaded part 62 and the closure drum 39 and be set between body 36 and the guard block 53.

Locating stud 61 and threaded part 62 according to such configuration; when carrying out the dismounting operation according to connector portion 49 to aerial lug 50, act on the external force on the dividing plate 53a and act on counter-force on the 53b of cable supporting portion from the outer layer line 55 of closure cable 41; the direction that feeds through to the power of guard block 53 is to center on the clockwise direction of the axis of threaded part 62 along Fig. 4; that is the tightening direction of threaded part 62.Therefore, between locating stud 61 and body 36 and guard block 53, even some slits are arranged, threaded part 62 can not become flexible yet, and just can not only prevent loosening but also guard block 53 is tightened against on the body 36 with the single threaded part 62 of minimum number.

The as above throttle body device 27 of Gou Chenging, but be disposed at the top of the crankcase 22 of the motor E of power plant P on vehicle body frame 11 and be positioned at the place ahead of the shaking bearing point SP of shaking bearing.In addition, on the top of crankcase 22, self starting motor 63 (with reference to Fig. 3) is configured in the rear of described shaking bearing point SP.And the bottom 43a of the control box 43 of throttle body device 27 is to be formed general planar portion from the top of motor E and the mode of its subtend.

Here, the front portion of vehicle body frame 11, by falling tube 14, last square tube 15 and 2 parts that following

square tube

17,17 is surrounded are mounted with fuel tank 68.Described vehicle body frame 11, the part of power plant P and fuel tank 68, the car body cover of being made by synthetic resin 69 covers, this car body cover 69 is by forming with the bottom: the radiator grille 70 of covering body framework 11 front portions, with the pairing left and right leg baffle plate 71 that is connected the both sides that are arranged on this radiator grille 70 ... with at leg baffle plate 71 ... the pedal 72 of the pairing left and right that connects respectively of lower end ... with at 2 pedals 72 ... between projection upward, cover the pedal tunnel portion 73 of fuel tank 68, with from described two pedals 72 ... the baffle portion 74 of the vertical below of outer side ..., and be connected baffle portion 74 ... the rear mask 75 at pedal 72 and pedal tunnel portion 73 and covering body framework 11 rear portions.

Cover on 75 the two-seat version vehicle seat 76 that configuration is supported with described two

back pipes

16,16 in the back.

On fuel tank 68, built-in filter 77 and be connected the other end of the fuel pipe 79 on this petrolift 78 by petrolift 78, one ends of fuel in the described filter 77 draws fuel casees 68 is connected on the described Fuelinjection nozzle 32 by described joint 33.

Such petrolift 78 is built in leave motor E locational and is loaded in the fuel tank 68 of front portion of vehicle body frame 11, owing to adopt the structure of petrolift 78 be not installed on power plant P, so can realize the miniaturization of power plant P and the assembling performance of power plant P.

On vehicle body frame 11, fix the 1st jig 80 of controlling fuel pipe 79 intermediate portions, in the present embodiment, after pairing left and right, managing 16, under the direction of advance state of motor bike, the dunnage 81 in the front portion of the back pipe 16 that is arranged at leftward position tightens set the 1st jig 80 in the middle of 16.And, between Fuelinjection nozzle 32 and the 1st jig 80, fuel pipe 79 is bent the right side that is configured in vehicle body frame 11, and the 2nd jig 82 of controlling near the part of the motor E of fuel pipe 79 is fastened on the fuel pipe dunnage 83, thereby is fixed in motor E one side.

Thus, the 1st jig 80 of controlling fuel pipe 79 intermediate portions is fixed on the vehicle body frame 11, between Fuelinjection nozzle of setting up on the motor E 32 and the 1st jig 80, fuel pipe 79 is bent the right side that is configured in vehicle body frame 11, fluctuating corresponding to power plant P like this, part in the fuel pipe 79 between the 1st jig 80 and the motor E is twisted, can avoid on fuel pipe 79, producing bending deflection because of fluctuating of power plant P, because for by the intensity height of the strength ratio bending of the fuel pipe 79 of being twisted, so compare with bending deflection, can improve the durability of fuel pipe 79.

And motor E the 2nd jig 82 partly that will control near fuel pipe 79 is fixed in motor E one side, at the 1st and the 2nd jig 80, between 82, fuel pipe 79 is bent the right side that is configured in vehicle body frame 11, so can improve curved configuration precision to the fuel pipe 79 on vehicle body frame 11 right sides by the 2nd jig 82, simultaneously, can prevent towards the continual-connecting-part of the fuel pipe 79 of Fuelinjection nozzle 32, the bending deflection that on this fuel pipe 79, produces.

In Fig. 7, described fuel pipe 79, for example be the 79a of internal layer portion that makes by fluorine class rubber, the 79b of middle level portion with the described internal layer 79a of portion of the covering of making by nitrile butadiene rubber, the multi-layer high-voltage type pipe that forms with the reticular part 79c that makes and cover the described middle level 79b of portion by polyester and the outermost outer 79b of portion that makes by the accurate rubber in sea (hydrin rubber).One termination of this fuel pipe 79 is combined on the connecting pipe 84 that is connected on the petrolift 78, and keeps joint to the fuel pipe 79 of connecting pipe 84 by the 1st pipe clamp 85.In addition, the other end of fuel pipe 79 is engaged on the fuel joint 33 that is connected on the Fuelinjection nozzle 32, and keeps joint to the fuel pipe 79 of fuel joint 33 by the 2nd pipe clamp 86.

Owing to fuel pipe 79 is made of multi-layer high-voltage, therefore, increase the intensity of fuel pipe 79 like this, can express the raising of the endurance quality of the fuel pipe 79 that imports fuel under high pressure.

; fuel pipe 79; it for example is the fuel pipe of using the protective tube 87 that forms by ethylene propylene rubber to cover; with the continue fuel pipe 79 of on fuel joint 33 state of the 2nd pipe clamp 86; the one end is plugged on the protective tube 87, and an end of the fuel pipe 79 that protrudes from protective tube 87 continues on connecting pipe 84 with the 1st pipe clamp 85.

The 1st jig 80 is one connection board 89 and structures of forming on cylindrical part 88, so that have the flange 90a that mode that cylindric yielding rubber 90 runs through this cylindrical part 88 will be docked at these cylindrical part 88 two ends at two ends, 90a is installed on the cylindrical part 88.So, run through in the described yielding rubber 90 and kept fuel pipes 79 with the protective tube 87 that covers fuel pipe 79 by the 1st jig 80, on the spliced eye 91 that is provided with on the described installation board 89, insert the bolt 92 that is used for the 1st jig 80 is connected in vehicle body frame 11.

The 2nd jig 82 has and the identical structure of above-mentioned the 1st jig 80, keeps fuel pipes 79 by yielding rubber 90 and protective tube 87 by the 2nd jig 82, and by bolt 93 the 2nd jig 82 is fastened on the fuel pipe dunnage 83.

And the 1st and the 2nd jig 80; 82; the left and right sides separate configuration of upwardly extending car body center line BC in front and back; at the 1st and the 2nd jig 80; fuel pipe 79 between 82 and protective tube 87; be disposed at the same side of the left and right directions of vehicle body frame 11 by

jig

80,82 arbitrarily, extend on the right side that is configured in the present embodiment when the state of the place ahead of motor bike direction of advance.That is, the fuel pipe 79 between the 1st and the

2nd jig

80,82 is bent the right side that is configured in vehicle body frame 11 in the mode of swelling.Therefore for fuel pipe 79, the length between setting the 1st that can be long and the

2nd jig

80,82 can suppress to be added in the bending load on the fuel pipe 79 so more reliably, can improve the durability of fuel pipe 79.

Motor E in addition, the approximate centre position of its left and right directions, be the allocation position of Fuelinjection nozzle 32, be to being provided with from described car body center line BC with the same side of the 1st jig 80, i.e. left side skew, and be supported on the vehicle body frame 11, if dispose like this, then help guaranteeing the length of shaking of flame tube 79.

In Fig. 8, sucking pipe 29 is formed and throttle body device 27 is connected with the cylinder head 30 that is positioned at these throttle body device 27 belows and bends to roughly C font, on the 36a of downstream side splicing sleeve portion on the body 36 that is arranged at described throttle body device 27, closely be embedded in the elasticity connecting cylinder 28 of upstream extremity downstream, closely be entrenched on the upstream extremity of described sucking pipe 29, to the coupled condition of the described body 36 and the sucking pipe 29 of elasticity connecting cylinder 28, keep by the tightening state of the 3rd jig 94 that surrounds elasticity connecting cylinder 28.Be the body 36 of throttle body device 27,, be connected on the cylinder head 30 by elasticity connecting cylinder 28 and sucking pipe 29.

With reference to Fig. 9, Fuelinjection nozzle 32 to intakeport 31 burner oils of cylinder head 30 is installed on the sucking pipe 29, and the on-off action of this Fuelinjection nozzle 32 is controlled by the control unit 42 of accommodating, being fixed in the control box 43 that is installed on described throttle body device 27 bodies 36.And the aerial lug 95 that the wire harness 52a that goes out in wire harness 52 top sets that carry out ligation from the lead 51 that will be connected with control unit 42 connects is installed on the 32a of connector portion that is arranged on the Fuelinjection nozzle 32.

On sucking pipe 29, be provided with mounting hole 96, front end internally is embedded in the mounting hole 96 front end of Fuelinjection nozzle 32 is airtight towards sucking pipe 29 towards cylinder head 30 side openings.In addition, at the head of Fuelinjection nozzle 32, has the 33a of splicing sleeve portion that forms as one and be connected, simultaneously with fuel pipe 79, make the 33a of this splicing sleeve portion in mode, the close chimeric fuel joint 33 that forms by synthetic resin of liquid by described Fuelinjection nozzle 32 inside.

And on fuel joint 33, be provided be arranged on described Fuelinjection nozzle 32 on the sealed recess 97 that engages of engagement lugs 32b, engagement lugs 32b being engaged in sealed recess 97 and fuel joint 33 is embedded in the head of Fuelinjection nozzle 32, and be for certain with respect to the 33a of splicing sleeve portion with the Zhou Fangxiang determining positions of Fuelinjection nozzle 32.

Described fuel pipe dunnage 83, form in the mode of extending along the fuel pipe 79 that is connected with the 33a of splicing sleeve portion of fuel joint 33, one end of this fuel pipe dunnage 83 is to be tightened jointly by a plurality of for example 1 pair of

bolt

98,98 and to be fixed on the sucking pipe 29 with fuel joint 33.Promptly, between with and front end is entrenched in mode one that the Fuelinjection nozzle 32 on the mounting hole 96 extends abreast and protrudes between the end of the boss part 29a that is arranged on the sucking pipe 29 and described fuel pipe dunnage 83, supporting portion 33b is arranged on the described fuel joint 33 integratedly, molding is in conjunction with the

sleeve pipe

99,99 of pair of metal system on its supporting portion 33.And, be inserted in an end and described two sleeve pipes 99 of fuel pipe dunnage 83, bolt 98 on 99,98, be threaded on the described boss part 29a, and between described supporting portion 33b and boss part 29a, clip locating clip 101 quilts that engage and determine the axial position of Fuelinjection nozzle 32 with the engaging groove 100 that is arranged at Fuelinjection nozzle 32 peripheries.

Described supporting portion 33b, it is the structure that is positioned at the Zhou Fangxiang position of departing from the 33a of splicing sleeve portion, extends and be wholely set with fuel joint 33 to the 32a of connector portion opposite direction with Fuelinjection nozzle 32, by the coupling position of such decision, can increase the lead continual-connecting-part of subtend Fuelinjection nozzle 32 and the degrees of freedom of arranging to the continual-connecting-part of fuel pipe 79 to the sucking pipe 29 of fuel joint 33.

As mentioned above, one end of fuel joint 33 and fuel pipe dunnage 83 is engaged by tightening with sucking pipe 29, it serves as certain making the Zhou Fangxiang position with respect to the Fuelinjection nozzle 32 of the 33a of splicing sleeve portion of fuel joint 33 with this, simultaneously, position with respect to the Fuelinjection nozzle 32 of the intakeport 31 of described cylinder head 30 is decided to be necessarily, and Fuelinjection nozzle 32 is clipped between fuel joint 33 and the sucking pipe 29.

In the both sides of fuel pipe dunnage 83, with the sidepiece of Fuelinjection nozzle 32 opposition sides, between the wire harness 52 and motor E that connect on the control unit 42 of throttle body device 27, roughly at right angles and integratedly be connected with the screening hot wall 83a that is used to prevent from described wire harness 52 to be brought baneful influence by the radiation heat that motor E produces.

At the other end of fuel pipe dunnage 83, the 2nd jig 82 that supports fuel pipe 79 is linked by bolt 83, and fuel pipe 79 is supported on the other end of fuel pipe dunnage 83.

The following describes embodiment's effect, fuel joint 33 with 33a of splicing sleeve portion that the fuel pipe 79 that will import fuel is connected with Fuelinjection nozzle 32, to be decided to be necessarily with respect to the Zhou Fangxiang position of the Fuelinjection nozzle 32 of the 33a of splicing sleeve portion, and be embedded in Fuelinjection nozzle 32 heads liquid sealing, not only will be decided to be with respect to the position of intakeport 31 necessarily but Fuelinjection nozzle 32 is held on and sucking pipe 29 between, and fuel joint 33 is connected on the sucking pipe 29, so pass through binding to the sucking pipe 29 of fuel joint 33, can will be decided to be necessarily with respect to the relative position of the Fuelinjection nozzle of intakeport 31 and with respect to the position of the fuel pipe 79 of Fuelinjection nozzle 32, and Fuelinjection nozzle 32 can be installed on sucking pipe 29, improve the Fuelinjection nozzle 32 when supplying with the fuel of single cylinder engine E and the installation reliability of fuel pipe 79.

In addition, one end of fuel pipe dunnage 83, by by pair of

bolts

98,98 with tightening jointly of fuel joint 33 and being linked on the sucking pipe 29, upper support fuel pipe 79 in the other end of fuel pipe dunnage 83, so not only can avoid the increase of number of spare parts but also the vibration that can alleviate fuel pipe 79.And, fuel pipe dunnage 83, form in the mode of extending along the fuel pipe 79 that continues on the 33a of splicing sleeve portion of fuel joint 33, keep fuel pipe 79 at the connector portion 32a place of Fuelinjection nozzle 32 and do not interfere, can increase the degrees of freedom in the configuration of the described connector 32a of portion with fuel pipe 79.

And then, though the front portion of the power plant P that comprises motor E can be fluctuated and supported by vehicle body frame 11, but owing to fuel pipe 79 is connected on the fuel tank 68 that is loaded on the vehicle body frame 11 by petrolift 78, so fuel pipe 79 and power plant P are shaken together, and motor E is shaken, can make the installation of the Fuelinjection nozzle 32 of the small-sized two-wheel Motor Vehicle that is loaded on the vehicle body frame 11 become easy like this.

In addition; though fixed knot valve drum 39 on a end on the throttle body device 27, at its valve shaft 37; but with closure drum 39 opposition sides, be installed on the control box 43 on the body 36; should be connected in the lead 51 on the control unit 42 that is accommodated in the described control box 43 ... connect from closure drum 39 sides, and have between lead 51 ... and the guard block 53 of the partition board portion 53a between the closure drum 39 is installed on the body 36.

Therefore, can can reliably prevent the lead 51 of connection on the control box 43 on the one hand ... with the interference of closure drum 39, on the one hand with lead 51 ... utmost point near-earth distribution is connected to body 36 1 sides, can guarantee near the distribution space body 36 easily, and make near the lead 51 that comprises the body 36 ... overall compact at interior throttle body device 27.

In addition, because the cable supporting portion 53b of outer layer line 55 1 ends is integrally formed on the guard block 53 on determine position and the supporting section valve cable 41,, reduced amount of parts so the supporting part of closure cable 41 special uses needn't be set especially.

And then; on control box 43; will with lead 51 ... the connector portion 49 that the aerial lug 50 that connects is installed removably is to be wholely set in the face of closure drum 39 ground; and the dividing plate 53a of guard block 53 along with respect to the installation direction of the aerial lug 50 of connector portion 49 with tabular extension; so the time with respect to the dismounting operation of the aerial lug 50 of connector portion 49; can guide aerial lug 50 with dividing plate 53a; the dismounting operation of aerial lug 50 is become easily, guarantee good maintenance.

And then, be supported on the air-strainer 25 on the stepless speed variator M of power plant P, be connected in by throttle body device 27 and sucking pipe 29 on the cylinder head 30 of motor E, and the body 36 of throttle body device 27, connect by the sucking pipe 29 that is connected on elasticity connecting cylinder 28 and the cylinder head 30, and the control unit 42 of the running of motor E control usefulness is assembled in throttle body device 27 on the described body 36, is configured in the place ahead of shaking fulcrum SP of the vehicle body frame 11 on crankcase 22 tops on the power plant P motor E.

Therefore, act on vibration on the throttle body device 27 from motor E, absorb by elasticity connecting cylinder 28, can alleviate the vibration that involves the control unit 42 that is installed on the throttle body device 27 with this, and, owing to disposed throttle body device 27 in the place ahead of shaking fulcrum SP, institute so that between cylinder head 30 and the throttle body device 27 distance extremely short, can alleviate the load that acts on the elasticity connecting cylinder 28 between throttle body device 27 and the cylinder head 30.

In addition, on throttle body device 27, the end that roughly is the valve shaft 37 of level for axis, at the outside of body 36 configuration control unit 42, the bottom 43a that takes in this control unit 42 and be installed on the control box 43 on the body 36 be formed from the top relative with motor E to the par, set the volume of control box 43 greatly so can try one's best, and owing to make control box 43 bottom 43a become the par, so can improve the use degrees of freedom.

In addition, at described fulcrum SP rear, the crankcase 22 tops configuration self starting motor 63 of shaking, therefore, control unit 42 and self starting motor 63 are tried one's best away from the ground connection road surface of small-sized two-wheel Motor Vehicle, the baneful influence of the water that splashes on the road surface can be tried one's best do not feed through to control unit 42 and self starting motor 63, simultaneously owing to control unit 42 and self starting motor 63 are disposed at the both sides, front and back of shaking strong point SP, so the clutter from self starting motor 63 can not fed through on the control unit 42 as far as possible.

And then, at the opposition side of control unit 42, be fixed in the lead 51 that is connected on reel on the closure drum 39 of valve shaft 37 the closure cable 41 that connects and the control unit 42 ... disposing corresponding to the mutual reverse extension of the part of throttle body device 27, thereby to closure cable 41 and lead 51 ... any one party when keeping in repair, can not influence closure cable 41 and lead 51 ... the opposing party, the maintainability of envoy's valve cable 41 and lead 53 is good.

Embodiments of the invention more than have been described, but the present invention is not limited only to the foregoing description, can carries out various design alterations not breaking away from the content of the present invention that characteristic range of the present invention puts down in writing.

For example, in the above-described embodiments, the situation that Fuelinjection nozzle 32 is installed on the sucking pipe 29 is illustrated, but also can uses the present invention for the situation that Fuelinjection nozzle 32 is installed on the cylinder head 30.In addition, the situation of carrying out independent fueling on each cylinder of multiple cylinder engine also can be used the present invention.

And then, also can apply the present invention to small-sized two-wheel Motor Vehicle motor bike in addition, motor tricycle.

(invention effect)

1 invention of being put down in writing according to the present invention, by the fuel joint is linked on cylinder head or the sucking pipe, and will be decided to be necessarily for the relative position of the Fuelinjection nozzle of intakeport and for the position of the fuel pipe of Fuelinjection nozzle, and can Fuelinjection nozzle be installed at sucking pipe or cylinder cap, in the time of can improving on single cylinder engine fueling or the Fuelinjection nozzle when each cylinder independence fueling of multiple cylinder engine and the installation reliability of fuel pipe.

In addition, 2 inventions of being put down in writing according to the present invention have been avoided the increase of amount of parts, the vibration that can lower fuel pipe on the other hand on the one hand.

3 inventions of being put down in writing according to the present invention because fuel pipe is shaken with power plant, so that motor just shakes the Fuelinjection nozzle that is loaded on the dilly on the vehicle body frame can be installed easily.

Claims

1. the fuel supply structure of a small vehicle motor, connect the sucking pipe (29) that links to each other with the intakeport (31) of this cylinder head (30) for going up in the cylinder head (30) that is loaded into the motor (E) on the vehicle body frame (11), and, it is characterized in that at sucking pipe (29) or the last dilly of installing to the Fuelinjection nozzle (32) of described intakeport (31) burner oil of cylinder head (30):

Fuel joint (33) has the fuel pipe (79) that will import fuel and is connected splicing sleeve portion (33a) on the described Fuelinjection nozzle (32), this fuel joint (33), to be decided to be certain and chimeric with liquid sealing with respect to the Zhou Fangxiang position of the described Fuelinjection nozzle (32) of described splicing sleeve portion (33a) at the head of described Fuelinjection nozzle (32), and will be decided to be with respect to the position of described intakeport (31) necessarily, simultaneously with and described sucking pipe (29) or cylinder head (30) between the mode of the described Fuelinjection nozzle of clamping (32) be linked on described sucking pipe (29) or the cylinder head (30).

2, the fuel supply structure of small vehicle motor according to claim 1, it is characterized in that: along an end of the fuel pipe dunnage (83) that is connected in described fuel pipe (79) extension in the described splicing sleeve portion (33a), be linked on described sucking pipe (29) or the described cylinder head (30) by tightening jointly by a plurality of bolt (98) and described fuel joint (33), and, support described fuel pipe (79) in the other end of described fuel pipe dunnage (83).

3, the fuel supply structure of small vehicle motor according to claim 1 and 2, it is characterized in that: comprise described motor (E) and the variable-speed motor (M) that transmits to trailing wheel (WR) behind the output variable speed of this motor (E) and described trailing wheel (WR) are bearing in the power plant (P) at rear portion by axle front portion, be supported on the vehicle body frame (11) with can fluctuating energy, on the fuel tank (68) that is loaded on this vehicle body frame (11), connect described fuel pipe (79).