CN1904344A

CN1904344A - Fuel supply structure of rocking three-wheels vehicle

Info

Publication number: CN1904344A
Application number: CNA2006100917177A
Authority: CN
Inventors: 八木泽胜一
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2005-07-29
Filing date: 2006-06-07
Publication date: 2007-01-31
Anticipated expiration: 2026-06-07
Also published as: TWI318663B; KR100748201B1; JP2007038714A; JP4584790B2; CN100432421C; TW200704876A; KR20070014954A

Abstract

The invention provide a fuel supplying pipe of a swing tricycle absorbing bending and twisting due to vertical swing movement and lateral roll movement of a vehicle body, and having high pressure resistance. In the swing tricycle equipped with a power unit 17 composed of an engine 76 and a continuously variable transmission, a fuel pump 41 is provided to a fuel tank 36 disposed on a vehicle body side so as to supply fuel to the engine 76. A fuel injection valve 91 provided to the engine 76 side is connected to the fuel pump 41 through the fuel supplying pipe 92 made from a resinous pipe capable of elastically deforming.

Description

The fuel supply construction of rocking three-wheels vehicle

Technical field

The present invention relates to the improvement of the fuel supply construction of rocking three-wheels vehicle.

Background technique

As the fuel supply construction of the rocking three-wheels vehicle in past, the known structure (for example with reference to patent documentation 1) that constitutes fuel distribution tube, is connected with the power unit with fuel tank by a plurality of members.

In addition, known to the structure (for example with reference to patent documentation 2) of high pressure with the sparger of petrolift in the flexible pipe connection fuel tank of rubber system and engine unit side.

[patent documentation 1] Japan opens clear 57-122492 communique in fact

[patent documentation 2] TOHKEMY 2003-176762 communique

In Fig. 1 of patent documentation 1, put down in writing such content, that is, can freely swing and can freely back vehicle body 15 be installed on front of the car 2 with sidewindering by connecting rod 12, swing axis 11 and axle 14.

In addition, in Fig. 2 of patent documentation 1, put down in writing such content, promptly, connecting tube 21 is connected to the fuel tank 19 of being located at front of the car by cock 20, an end that connects the 1st flexible steel in flat section tubing 23 at this connecting tube 21 by the joint 22 that is installed on framework, an end that connects the intermediate connection tube 24 that constitutes by metal tube at the other end of the 1st flexible steel in flat section tubing 23, an end that connects the 2nd flexible steel in flat section tubing 25 at the other end of this intermediate connection tube 24, the other end at the 2nd flexible steel in flat section tubing 25 is connected and fixed on an end of the guiding connecting tube 26 of vehicle body 15 afterwards, the other end of this guiding connecting tube 26 is connected in the Carburetor 27 of power unit 16 sides by rubber pipe 28.

Swing up and down as back vehicle body 15 relative fronts of the car 2, then be positioned at the joint 22 of front of the car 2 sides and the 1st flexible steel in flat section tubing 23, intermediate connection tube the 24, the 2nd flexible steel in flat section tubing deflection about in the of 25 of 26 of the guiding connecting tubes of vehicle body 15 sides afterwards.In addition, as back vehicle body 15 relative fronts of the car 2 towards about sidewinder, then the 1st flexible steel in flat section tubing 23, intermediate connection tube the 24, the 2nd flexible steel in flat section tubing 25 reverse.

In Fig. 2 of patent documentation 2 and Fig. 7, put down in writing such content, promptly, in fuel tank 10, petrolift is set, at vehicle frame 34 engine unit 19 can be installed with freely swinging, simultaneously, at engine unit 19 sparger 50 is set, with fuel hose 62 connection petrolift and the spargers 50 of high pressure, by the intermediate portion of the stay 63 supporting fuel flexible pipes 62 that are installed on vehicle frame 34 with rubber system.

Though at the big pressure that does not act on fuel at 27 the fuel distribution tube from fuel tank 19 to Carburetor of patent documentation 1 especially, but for example petrolift is set, is starting pusher side that the occasion that Fuelinjection nozzle replaces Carburetor is set at fuel tank, wish that the fuel distribution tube of these petrolifts of connection and Fuelinjection nozzle can bear the big pressure of fuel, simultaneously, absorb the swinging up and down of back vehicle body 15, about sidewinder deflection, the distortion of generation.

In patent documentation 2, for the occasion that is rocking three-wheels vehicle, except swing up and down, the vibration of sidewindering direction about also applying, so, use the shaping flexible pipe of present high pressure with rubber system, be difficult to simultaneously to satisfy up and down vibration and the requirement of required fuel feed.

Summary of the invention

The object of the present invention is to provide a kind of fuel distribution tube of rocking three-wheels vehicle, the fuel distribution tube of this rocking three-wheels vehicle absorb swinging up and down of vehicle body and about sidewinder deflection, the distortion of generation, simultaneously, have high resistance to pressure.

Technological scheme 1 provides a kind of fuel supply construction of rocking three-wheels vehicle, this rocking three-wheels vehicle has the swing bodies that is made of motor and stepless speed variator, it is characterized in that: in order to supply fuel to motor, at the fuel tank that is disposed at body side petrolift is set, the fuel feed pipe that constitutes by the resin pipe by elastically deformable will be located at the Fuelinjection nozzle that starts pusher side and be connected to this petrolift.

By being made of resin fuel feed pipe, thereby guaranteed to connect the high resistance to pressure of the fuel distribution tube of petrolift and Fuelinjection nozzle, and can carry out resiliently deformable, like this, even the relative body side of swing bodies is swung and is sidewindered, as the also deflection of fuel feed pipe of resin pipe, and can realize having the fuel feed pipe of the rocking three-wheels vehicle of petrolift and Fuelinjection nozzle.

Technological scheme 2 is characterised in that: fuel feed pipe is made of thermoplastic resin material, and its external diameter maximum forms 7mm.

Because the fuel supply pipe arrangement is thermoplastic resin material, so, inweaving high pressure with needs and compare with fuel feed pipe with the rubbery high pressure of lamination coating etc., wall thickness is little, and in addition, internal diameter also can be made lessly, and external diameter can be less.Like this, can guarantee needed fuel feed of rocking three-wheels vehicle and enough elasticity.

Technological scheme 3 is characterised in that: the external diameter of fuel feed pipe is 4mm to the maximum, is installed on the minimum 150mm of being in interval of the support member of body side in order to support this fuel feed pipe.

Because making the interval of support member littler also is 150mm, so, even the angle of roll of rocking three-wheels vehicle is 180 °, also can be good fuel feed pipe.

In technological scheme 1, the petrolift and the Fuelinjection nozzle that starts pusher side that connect body side by the fuel feed pipe as resin pipe of elastically deformable, so, by being made of resin fuel feed pipe, thereby guarantee to connect the high resistance to pressure of the fuel distribution tube of petrolift and Fuelinjection nozzle, and make elastically deformable, like this, even the relative body side of swing bodies is swung and is sidewindered, as the also deflection of fuel feed pipe of resin pipe, and can realize having the fuel feed pipe of the rocking three-wheels vehicle of petrolift and Fuelinjection nozzle.

In technological scheme 2, fuel feed pipe is made of thermoplastic resin material, its external diameter greatly also forms 7mm again, like this, because the fuel supply pipe arrangement is a thermoplastic resin material, so, inweave high pressure with needs and compare with fuel feed pipe with the rubbery high pressure of lamination coating etc., wall thickness is little, in addition, internal diameter also can be made lessly, and external diameter can be less.Like this, can guarantee needed fuel feed of rocking three-wheels vehicle and enough elasticity.

In technological scheme 3, the external diameter of fuel feed pipe greatly also is 4mm again, and the interval of the support member of this fuel feed pipe is littler also to be 150mm, so, even for example the angle of roll of rocking three-wheels vehicle is 180 °, also can be good fuel feed pipe.

Description of drawings

Fig. 1 is the profile of rocking three-wheels vehicle of the present invention.

Fig. 2 is the profile that the back vehicle body of rocking three-wheels vehicle of the present invention is shown.

Fig. 3 wants facial planes figure for rocking three-wheels vehicle of the present invention.

Fig. 4 be illustrate fuel feed pipe of the present invention rocking three-wheels vehicle want portion's profile.

Fig. 5 is the explanatory drawing of fuel feed pipe of the present invention.

Fig. 6 is the flat ratio and the plotted curve that requires the relation of crooked R that fuel feed pipe of the present invention is shown.

Fig. 7 is the flat ratio and the explanatory drawing that requires crooked R of explanation fuel feed pipe of the present invention.

Embodiment

Below, explanation is used to implement optimised form of the present invention with reference to the accompanying drawings.Accompanying drawing is watched by the direction of symbol.

Fig. 1 is the profile of rocking three-wheels vehicle of the present invention, rocking three-wheels vehicle 10 connects front of the car 14 and back vehicle body 18 by wabbler mechanism 21, this front of the car has the vehicle seat 13 that Joystick 12 that 1 front-wheel 11 turns to and driver are taken a seat, this back vehicle body 18 has pairing left and right trailing

wheel

16,16 and drives the power unit 17 of these

trailing wheels

16,16, thus can freely swing up and down with freedom about be connected front of the car 14 and back vehicle body 18 with sidewindering.

Front of the car 14 is provided with protecgulum 23 in Joystick 12 the place aheads, the windshield 26 with Windshield Wiper 24 is installed on top at this protecgulum 23, below 13 of Joystick 12 and vehicle seats, pedal 27 is set, erect pairing left and right column 28,28 (symbol 28 of front side only is shown) from vehicle seat 13 rears, roof 31 across windshield 26 and column 28,28, is disposed at vehicle seat 13 rears with container 32.Symbol 35 is for covering the front mudguard of front-wheel 11 tops, symbol 36 is a wing mirror, symbol 37 is a Headlamps, symbol 38 is for being located at the fuel tank of vehicle seat 13 belows, symbol 41 is for being located at the petrolift in the fuel tank 38, and symbol 42 is the buffer cell of the buffering usefulness of striding 21 of the vehicle frame of being located at front of the car 14 sides and wabbler mechanisms.

Back vehicle body 18 is connected in power unit 17 with air inlet system 51 and venting gas appliance 52, covers these power units 17, air inlet system 51, venting gas appliance 52, and other functional part and

trailing wheel

16,16 by the lid 53 of one.

Wabbler mechanism 21 comprises connecting rod 55 and connecting box 57, this connecting rod 55 can be free swing ground one end is installed on the vehicle frame bottom of front of the car 14, this connecting box 57 can freely swing front end is installed on the other end of this connecting rod 55, the rear end is installed on the power unit 17 of back vehicle body 18 by carriage 56.

Connecting box 57 comprises box main body 61, can be inserted into freely to rotate in this box main body 61 and with the rear portion and be installed on the coupling shaft 62 of power unit 17, and be located at the buffer part 63 of 62 of these box main bodies 61 and coupling shafts respectively.

Buffer part 63 is so-called " neidhart cushion ", towards a plurality of pushing members and 61 of the box main bodies that radially extend a plurality of columned rubber are being set from coupling shaft 62, by the relative revolution compressing rubber of pushing member with box main body 61, thus the performance buffer function.

Fig. 2 is the profile (partial section) that the back vehicle body of rocking three-wheels vehicle of the present invention is shown, on the coupling shaft 62 that constitutes wabbler mechanism 21, use bolt 66,66 mounting brackets 56, the bottom of with bolt 67,67 power unit 17 being installed at these carriage 56 places, top in the cylinder head 68 that constitutes power unit 17 is installed into device of air 51, venting gas appliance 52 is installed in bottom in cylinder head 68, in addition, at the stay member 71 of the top of power unit 17 mounting support lid 53.Arrow among the figure (FRONT) expression vehicle front (as follows).Symbol 73 among the figure is for being disposed at the radiator of power unit 17 right flank sides.

Power unit 17 is made of the stepless speed variator 77 that motor 76 and one are connected in this motor 76, by belt 82 revolution of bent axle 81 is delivered to driven shaft 83, from this driven shaft 83 by not shown gear transmission to output shaft 84, the trailing wheel 16,16 (with reference to Fig. 1) of drive installation in about output shaft 84.Symbol 86 is a cylinder front cover, and symbol 87 is a cylinder block, and symbol 88 is a gearbox.

Cylinder head 68 is equipped with suction tude 95 at inlet air pathway, this suction tude 95 is the combustion injection valve 91 of burner oil fixedly, connects the resinous fuel feed pipe 92 that begins to extend from the petrolift 41 (with reference to Fig. 1) of fuel tank 38 (with reference to Fig. 1) at Fuelinjection nozzle 91.

Air inlet system 51 comprises suction tude 95, be connected in the throttle body 96 of these suction tude 95 ends, be connected in this throttle body 96 the suction oral-lateral connecting tube 97 and be connected in the air-strainer 98 of this connecting tube 97, throttle body 96, air-strainer 98 all are positioned at the top of power unit 17, with stay member 71 support air filter cleaners 98.Symbol 101 is the carburetor cable from the closure handle handle extension of Joystick 12 (with reference to Fig. 1) side, is used to make the closures of being located in the throttle body 96 to open and close.

Venting gas appliance 52 is included in cylinder head 68 bottoms bolt 104,104 and nut 105, the 105 anterior outlet pipes 106 of ends being installed and the left side side of cylinder head 68 roughly being extended towards the top, the other end that is connected in this front portion outlet pipe 106 also extends to the catalyst tube 107 at rear slightly backwards down, be connected in the rear part exhaust pipe 108 that extend these catalyst tube 107 rear portions and oblique towards the rear below, be connected in the silencing apparatus 111 of these rear part exhaust pipe 108 rearward end, and the tail pipe 112 that extends from the oblique towards the rear below of this silencing apparatus 111, silencing apparatus 111 is configured to the position lower than catalyst tube 107, simultaneously, fixing a silencer 111 from gearbox 88 outstanding protuberance 88a by carriage 114.

When will from anterior outlet pipe 106 at the assembly department of cylinder head 68 when rear part exhaust pipe 108 is regarded an outlet pipe as, anterior outlet pipe 106 extends towards the top substantially from cylinder head 68 bottoms, catalyst tube 107 flatly extends substantially towards the rear, rear part exhaust pipe 108 is tiltedly below extension towards the rear, so, further increase the total length of an outlet pipe in the space that can in the lid 53 of back vehicle body 18, be restricted, i.e. the exhaust pipe range.

Stay member 71 comprises the stay main body 117 that is installed on power unit 17 and erects, be installed on the framework member 118 of these stay main body 117 upper end portions and be installed on the lid supporting bracket 121 of this framework member 118.

Stay main body 117 is made of anterior stay 124,125 and rear portion stay 127, and rear portion stay 127 makes the heat that is produced by silencing apparatus 111 not be delivered to the heat insulation thermal baffles 128 of ground installation such as air-strainer 98 between air-strainer 98 and silencing apparatus 111.

Lid supporting bracket 121 is made of the pairing left and right back carriage 132,132 (symbol 132 of front side only is shown) of being located at anterior pairing left and right front carriage 131,131 (symbol 131 of front side only is shown) and being located at the rear portion, with the lid 53 of bolt 133 by rubber installation one.

Lid 53 forwardly is provided with and makes the open front 136 of cylinder front cover 86 sides facing to vehicle body the place ahead, and the ventilating hole 137 that the labyrinth structure is set on top is provided with rear aperture 138 at the rear portion in order to make the inside and outside ventilation of covering 53.

The component parts of the component parts of above-mentioned air inlet system 51, venting gas appliance 52 and Fuelinjection nozzle 91 are functional part, and these functional parts and power unit 17 (being motor 76 and stepless speed variator 77) constitute the drive portion 130 that drives trailing

wheel

16,16.

Fig. 3 wants facial planes figure for rocking three-wheels vehicle of the present invention, about 16,16 of trailing wheels configuration power unit 17, configuration constitutes the throttle body 96 of air inlet system 51 on the vehicle body center line 140 that extends along the vehicle body fore-and-aft direction, at throttle body 96 rears configuration air-strainer 98, the catalyst tube 107 that constitutes venting gas appliance 52 is extended along the vehicle body fore-and-aft direction, simultaneously, silencing apparatus 111 is extended towards the overall width direction, thereby the vertical and silencing apparatus 111 of configuration catalyst tube 107 is vertical with meeting at

right angles.Symbol

141A, 141B are the axletree of trailing

wheel

16,16, and these

axletrees

141A, 141B connect by the differential attachment (not shown).

Throttle body 96 is connected in the rear end of the suction tude 95 of extending towards the rear from cylinder head 68.

Air-strainer 98 is installed with bolt 142 at 3 positions at framework member 118 rear portions that are combined into cross form, the air filter case 143 that constitutes air-strainer 98 is quadrilateral under plane view, short at the vehicle body fore-and-aft direction, long in the overall width direction, piping chamber triangular in shape in the plane view 146 and purifying chamber 147 will be separated into partition wall 144 in the air filter case 143, upper wall above piping chamber 144 is provided with leg-of-mutton suction port 148, the upper pipe 151 that piping chamber 144 is communicated with in the upper wall setting of air filter case 143 with purifying chamber 147.Symbol S1 among the figure is the width of the vehicle body left and right directions of air-strainer 98, and symbol S2 is the length of the vehicle body fore-and-aft direction of air-strainer 98, has the relation of S1＞S2.Symbol 152 is located at the extending portion of connecting tube 97 for one, for being configured in the part in the purifying chamber 147.

Catalyst tube 107 and silencing apparatus 111 form 2 limits in tetragonal space 155.

Space 155 is a quadrilateral, so, can be at 16,16 bigger areas of acquisition of trailing wheel, in this space 155, can neatly and closely arrange ground configuration throttle body 96, air-strainer 98, reach other many functional part (for example Fuelinjection nozzle 91, electric component, battery (not shown) etc.), can realize compactness, effectively utilize space 155.

Framework member 118 comprises the preceding framework 161 that extends and cross catalyst tube 107 front ends top towards the overall width direction, be positioned at these preceding framework 161 rears and be parallel to the back framework 162 that preceding framework 161 ground dispose, be positioned at the vehicle body side of these preceding framework 161 left parts and the left framework 163 that is connected orthogonally with preceding framework 161 and back framework 162, and be positioned at these left side framework 163 lefts and be parallel to the right framework 164 that right framework 163 ground are connected to preceding framework 161 and back framework 162, at left framework 163 and right framework 164 air-strainer 98 are installed.

The back framework 162 substantially member of rear portion stay 127 supportings of V font of serving as reasons.

Radiator 73 is anterior by not shown case lid installation on the right side of cylinder block 87 and gearbox 88, and trailing wheel 16 the place aheads from cylinder block 87 sides towards the right side dispose highlightedly.Symbol 73a is a radiator pressure cap.

Cover the top of power units 17, air inlet system 51, venting gas appliance 52,

trailing wheel

16,16, stay member 71, radiator 73 with the lid shown in two dot and dash line 53, be provided with in the place ahead of radiator 73 with the wind that travels be taken into cover 53 inside, particularly make the wind that travels be contacted with the vent hole 166 of radiator 73.

Fuel feed pipe 92 from petrolift 41 above fuel tank 38 towards right-hand oblique rear extension, then, extend towards the rear, below fuel tank 38, extend again towards vehicle body the place ahead, after carrying out u turn, extend towards the rear, afterwards, near wabbler mechanism 21 (with reference to Fig. 1), extend towards the rear along wabbler mechanism 21 again and be connected to the Fuelinjection nozzle 91 of being located at suction tude 95, fuel feed pipe 92 is made by the resin in thin footpath, elastically deformable, so, can improve assembling performance at rocking three-wheels vehicle, can follow shaking of vehicle body.Symbol 168 is the filler lid of fuel tank 38.

Fig. 4 be illustrate fuel feed pipe of the present invention rocking three-wheels vehicle want portion's profile, fuel tank 38 is at the pairing left and right upper bracket 202,202 of being located at vehicle frame 201 (symbol 202 of the front side only is shown) 38a of mounting flange portion, by backing plate 204 bottom 38b is installed in the pairing left and right lower tray 203,203 of being located at vehicle frame 201 (symbol 203 of front side only is shown), the petrolift 41 of built in type is installed on the top of this fuel tank 38.

Fuel feed pipe 92 is made by the thermoplastic resin material of elastically deformable, external diameter greatly also is 7mm again, preferably external diameter greatly also is 4mm again, the one end is connected in petrolift 41 by connector 206, above the rear portion of fuel tank 38, extend towards the rear, the rear of fuel tank 38 towards below crooked, extend along vehicle frame 201 in oblique the place ahead towards the below, at the curved part 201a of vehicle frame 201 nearby along the connecting box 57 of wabbler mechanism 21, rear end at connecting box 57 nearby erects, front end is connected in Fuelinjection nozzle 91 by connector 208, the way in by the clip 209 that is installed on vehicle frame 201,209 and be installed on the clip 210 of connecting box 57,210 supportings.

Fuel feed pipe 92 has and reduces external diameter flexibly, so, can reduce crooked radius of curvature, the degrees of freedom height of arranging, even power unit 17 swings up and down, back vehicle body 18 sidewinders, particularly fuel feed pipe 92 from vehicle frame 201 be cross over the part of connecting box 57,91 partial action bending force, torsion from connecting box 57 to Fuelinjection nozzle, also crooked easily, reverse easily, so, be not vulnerable to this influence, in addition, also can bear big fuel pressure.In addition, also can be easily crooked when arranging, pipe distribution operation can carry out simply.

Though not shown, fuel feed pipe 92 is fixed at a plurality of positions of at least one side of vehicle frame 201 and connecting box 57.

In addition, 150mm can be guaranteed respectively at least in the interval of the interval of clip 209,209, clip 210,210.Like this, even sidewindering of vehicle body makes fuel feed pipe 92 produce big reversing (for example 180 °), also can realize the fuel supply function of fuel feed pipe 92.

Fig. 5 is the explanatory drawing of fuel feed pipe of the present invention; fuel feed pipe 92 is the member that is formed by thermoplastic resin prepared material (for example nylon); compare with the occasion that forms by the rubber elastomeric material; formability is good; the also available coating 211 that is made of elastic material (for example rubber) covers outer circumferential face; by covering fuel feed pipe 92 by coating 211 like this; the influence of adhering to etc. of the acid rain in the adhering to, travel of the battery liquid in the time of can protecting fuel feed pipe 92 not keeped in repair realizes the long lifetime of fuel feed pipe 92.Coating 211 is provided with from the end to end ground of fuel feed pipe 92 is whole, perhaps also can be located at the part of fuel feed pipe 92.

In addition, also can form fluororubber layer, make it cover the inner peripheral surface of fuel feed pipe 92 at fuel feed pipe 92.When the many gasoline (sour gasoline) of the amount that makes the sulphur composition flows to the inside of fuel feed pipe 92, be not subjected to the influence of this gasoline by fluororubber layer protection fuel feed pipe 92, thereby can realize the long lifetime of fuel feed pipe 92 yet.

The connector 206 that is connected with the discharge side pipe 215 of being located at petrolift comprises housing 216 and is engaged in the retainer 218 of these housing 216 ends.

Housing 216 has the joint 221 of the end 92a that is connected to fuel feed pipe 92, the pipe patchhole 223 that is communicated with and inserts the end 215a that discharges side pipe 215 with the through hole 222 of being located at this joint 221, be located at the annulus 224 of end, and be located at the opening portion 225,225 of side.

Retainer 217 comprises the base portion 226 of ring-type, make a plurality of front ends 227 of the elastically deformable that front end extends with coming to a point from this base portion 226, and be located at the side protuberance 228 of the side of these front ends 227, make front end 227 be contacted with the wide diameter portion 215b that discharges side pipe 215, simultaneously, side protuberance 228 is engaged in the annulus 224 of housing 216, thereby connector 206 is connected in discharge side pipe 215.Symbol 231,231 is the O-ring seals as sealing component, the align member of symbol 232 in pipe patchhole 223 the end 215a that discharges side pipe 215 being positioned.

Fig. 6 is the flat ratio and the plotted curve that requires the relation of crooked R that fuel feed pipe of the present invention is shown, and the longitudinal axis is a flat ratio, and transverse axis is for requiring crooked R.

In Fig. 7, not extend under the state of fuel feed pipe with straight line shape agley, the A-A line cross section of fuel feed pipe is circular, and external diameter is D1, and wall thickness (thickness of slab) is t1.In addition, under the state (minimum bending radius of neutral position is R (requiring crooked R)) of crooked fuel feed pipe, the B-B line cross section of fuel feed pipe is roughly ellipse, and the minor axis of oval profile is D2, and wall thickness (thickness of slab) is t2.

Can learn flat ratio=(minor axis side outer diameter D 2+ thickness of slab t2)/(initial stage outer diameter D 1+ thickness of slab t1) from above.

Turn back to Fig. 6, in plotted curve, the external diameter that fuel feed pipe is shown is 4.0mm, 5.0mm, 7.0mm, and the flat ratio and the relation that requires crooked R of the occasion of 8.0mm.

Require crooked R to be lower than the zone of allowing flat ratio above predetermined value M and flat ratio, require crooked R big even be, so but since the little fuel feed pipe of flat ratio damage also big NG zone by pressure, when external diameter is 7.0mm (being 4.0mm, 5.0mm, 7.0mm) at most, break away from the NG zone, when external diameter is 8.0mm, enter the NG zone.

In the rocking three-wheels vehicle of this form of implementation, establish flat ratio more than or equal to 80%, requiring crooked R is 25R.

Therefore, be the fuel feed pipe of 7mm at most for external diameter, can guarantee needed fuel feed of the rocking three-wheels vehicle of swinging and sidewindering and enough elasticity.

As above Fig. 1, Fig. 3 and as shown in Figure 4, rocking three-wheels vehicle 10 of the present invention has the power unit 17 as swing bodies, this power unit 17 is made of motor 76 and stepless speed variator 77, it is characterized in that, in order to supply fuel to motor 76, at the fuel tank 38 that is disposed at body side petrolift 41 is set, the Fuelinjection nozzle 91 that the fuel feed pipe 92 that constitutes by the resin pipe by elastically deformable will be located at motor 76 sides is connected in this petrolift 41.

By being made of resin fuel feed pipe 92 like this, can guarantee to connect the high resistance to pressure of petrolift 41 and the fuel distribution tube of Fuelinjection nozzle 91, and because its elastically deformable, even therefore power unit 17 relative body side are swung and are sidewindered, as fuel feed pipe 92 deflections of resin pipe, and can realize having the fuel distribution tube of the rocking three-wheels vehicle 10 of petrolift 41 and Fuelinjection nozzle 91.

In addition, the invention is characterized in: fuel feed pipe 92 is made of thermoplastic resin material, and its external diameter forms 7mm at most.

Like this, because fuel supply pipe arrangement 92 is thermoplastic resin material, so, inweaving high pressure with needs and compare with fuel feed pipe with the rubbery high pressure of lamination coating etc., wall thickness is little, and in addition, internal diameter also can be made lessly, and external diameter can be less.Like this, can guarantee rocking three-wheels vehicle 10 needed fuel feeds and enough elasticity.

In addition, the invention is characterized in: the external diameter of fuel feed pipe 92 is 4mm at most, and the interval that is installed on the clip 209,209 as support member (or clip 210,210) of body side in order to support this fuel feed pipe 92 is at least 150mm.

Like this, even for example the angle of roll of rocking three-wheels vehicle 10 is 180 °, also can form good fuel feed pipe 92.

The present invention is applicable to the cart of unit swing.

The fuel supply construction of rocking three-wheels vehicle of the present invention is suitable for rocking three-wheels vehicle.

Claims

1. the fuel supply construction of a rocking three-wheels vehicle, this rocking three-wheels vehicle has the swing bodies that is made of motor and stepless speed variator, it is characterized in that:

At the fuel tank that is disposed at body side petrolift is set, in order to supplying fuel to above-mentioned motor, the fuel feed pipe that constitutes by the resin pipe by elastically deformable will be located at the above-mentioned Fuelinjection nozzle of pusher side that starts and be connected to this petrolift.

2. the fuel supply construction of rocking three-wheels vehicle according to claim 1, it is characterized in that: above-mentioned fuel feed pipe is made of thermoplastic resin material, and its external diameter maximum forms 7mm.

3. the fuel supply construction of rocking three-wheels vehicle according to claim 2, it is characterized in that: the external diameter of above-mentioned fuel feed pipe is 4mm to the maximum, is installed in order to support this fuel feed pipe that the interval of support member of body side is minimum to be 150mm.