WO2019117239A1

WO2019117239A1 - Straddle-type vehicle

Info

Publication number: WO2019117239A1
Application number: PCT/JP2018/045846
Authority: WO
Inventors: 俊博久保; 朋矢中村; 洪太中内; 泰樹坂根
Original assignee: 本田技研工業株式会社
Priority date: 2017-12-14
Filing date: 2018-12-13
Publication date: 2019-06-20
Also published as: BR112020011507A2; JP6846542B2; BR112020011507B1; JPWO2019117239A1; CN111433115B; CN111433115A

Abstract

This straddle-type vehicle comprises: a vehicle body frame (F); an engine (2) attached to the vehicle body frame (F); intake piping (36) for supplying air to the engine (2); and a fuel pump (38) for supplying fuel to the engine (2). The fuel pump (38) is supported by a stay member (47) extending from the vehicle body frame (F) and is disposed in an area surrounded by the engine (2) and the intake piping (36) in a vehicle side view.

Description

Saddle-ride type vehicle

The present invention relates to a saddle-ride type vehicle equipped with an engine.
Priority is claimed on Japanese Patent Application No. 2017-239963, filed Dec. 14, 2017, the content of which is incorporated herein by reference.

In a saddle-ride type vehicle equipped with an engine, an intake pipe is connected to the engine, and a fuel pump for supplying fuel to the engine is provided. In recent years, a saddle-ride type vehicle has been developed in which a fuel pump is mounted at a position close to an intake pipe (see, for example, Patent Document 1).

In the saddle-ride type vehicle described in Patent Document 1, the intake pipe extends from the cylinder portion of the engine toward the rear of the vehicle body, and the fuel pump is integrally attached to the throttle body provided in the intake pipe. . The fuel pump is attached to the lower side of the throttle body and disposed in the area close to the intake pipe.

Japan JP 2013-71697

However, in the above-mentioned conventional saddle-ride type vehicle, since the fuel pump is integrally attached to the throttle body, the arrangement of the fuel pump is easily restricted by the position of the throttle body. For this reason, the current situation is that the degree of freedom in the arrangement of the fuel pump on the vehicle body is low.

The aspect of the present invention provides a saddle-ride type vehicle in which the fuel pump can be disposed on the vehicle body with a high degree of freedom at a position close to the intake passage.

A straddle-type vehicle according to an aspect of the present invention includes a body frame; an engine attached to the body frame; an intake pipe for supplying air to the engine; and a fuel pump for supplying fuel to the engine. The fuel pump is supported by a stay member extending from the vehicle body frame, and is disposed in an area surrounded by the engine and the intake pipe in a side view of the vehicle.

According to the above configuration, the fuel pump can be arranged with a high degree of freedom in a wide area surrounded by the engine and the intake pipe in a side view of the vehicle by being supported by the stay member extended from the vehicle body frame.

The fuel pump is disposed so that the longitudinal direction of the fuel pump is substantially along the vehicle width direction of the vehicle and below the intake pipe, and the connection portion of the fuel passage of the fuel pump is It may be arranged to be biased to one side in the vehicle width direction.

In this case, the fuel pump is disposed below the intake pipe substantially along the vehicle width direction, and the connection portion of the fuel passage of the fuel pump is disposed to be biased to one side in the vehicle width direction. It becomes possible to arrange the passages collectively at one side in the vehicle width direction below the intake pipe. Therefore, when this configuration is adopted, piping work of the fuel passage becomes easy, and the appearance also improves.

The fuel pump may be covered by an insulating cover member.

In this case, it is possible to block the heat of the engine from acting directly on the fuel pump by the heat insulating cover member.

The fuel pump may be supported by the stay member via an elastic member.

In this case, since the fuel pump is floatingly supported by the elastic member, it is possible to suppress the transmission of the vibration input from the vehicle body frame to the stay member to the fuel pump.

The stay member may be configured by combining a plurality of members.

In this case, it is possible to easily cope with fuel pumps of various specifications by changing the combination of a plurality of members constituting the stay member.

The engine comprises: a crankcase for housing a crankshaft; and a cylinder portion which is erected upward from a front side of the crankcase; and the intake pipe is on the rear side of the cylinder from the cylinder portion above the crankcase. Extending toward the vehicle body, the vehicle body frame includes a pivot frame for supporting the swing arm on the rear side of the engine, and the fuel pump has the crankcase, the cylinder portion, and the intake pipe in a side view of the vehicle. And the pivot frame.

In this case, since the peripheral region of the fuel pump is surrounded by the crankcase of the engine, the cylinder portion of the engine, the intake pipe, and the pivot frame, these members can protect the fuel pump from the surroundings.

According to the aspect of the present invention, since the fuel pump is supported by the stay member extending from the vehicle body frame and disposed in a region surrounded by the engine and the intake pipe in a side view, the fuel pump is close to the intake passage. In position, it can be arranged on the vehicle body with a high degree of freedom.

FIG. 1 is a side view of a saddle-ride type vehicle according to an embodiment of the present invention. It is a side view showing the installation part of the fuel pump of one embodiment of the present invention. It is the perspective view which removed the one part components which show the installation part of the fuel pump of one Embodiment of this invention. It is the perspective view which removed the one part components which show the installation part of the fuel pump of one Embodiment of this invention. It is a perspective view which shows the installation part of the stay member of one Embodiment of this invention. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5 according to an embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 4 according to an embodiment of the present invention. It is a perspective view which shows the installation part of the stay member of other embodiment of this invention. It is a left side view showing a fuel pump plate concerning a modification of an embodiment. It is a right side view showing a fuel pump plate concerning a modification of an embodiment. It is a perspective view showing a fuel pump plate concerning a modification of an embodiment.

Hereinafter, an embodiment of the present invention will be described based on the drawings. In the following description, the directions such as front, rear, left, and right are the same as the directions in the vehicle unless otherwise specified. Further, the arrow FR in the figure points to the front of the vehicle, the arrow UP points to the upper side of the vehicle, and the arrow LH points to the left of the vehicle.

FIG. 1 is a view showing a left side surface of a saddle-ride type vehicle according to an embodiment. A saddle-ride type vehicle according to the present embodiment is a motorcycle 1.
The body frame F of the motorcycle 1 has a head pipe 11 disposed at the front end, a main frame pipe 12 extending obliquely rearward and downward from the head pipe 11, and a connecting portion between the main frame pipe 12 on the head pipe 11 And a pivot frame 14 that curves and extends downward from the rear area of the main frame pipe 12. The lower ends of the left and right pivot frames 14 are connected by a cross pipe (not shown) extending in the vehicle width direction.

The vehicle body frame F further includes a pair of left and right seat rails 16 extending from the rear of the main frame pipe 12 toward the vehicle rear side, and a support pipe 17. The right support pipe 17 couples the right pivot frame 14 and the rear area of the right corresponding seat rail 16. The left support pipe 17 connects the left pivot frame 14 and the rear area of the corresponding left seat rail 16.

A steering stem (not shown) is rotatably supported by the head pipe 11.
A top bridge 18 is attached to the top of the steering stem, and a bottom bridge 19 is attached to the bottom of the steering stem. A pair of left and right front forks 22 is held by the top bridge 18 and the bottom bridge 19. A front wheel WF is rotatably supported at lower ends of the left and right front forks 22. In addition, a steering handle 21 is attached to the top bridge 18.

A fuel tank 50 is attached above the main frame pipe 12. On the seat rail 16 at the rear of the fuel tank 50 is mounted a seat 51 for the occupant to sit on. An air cleaner 52 for filtering air taken in by the engine 2 is disposed substantially inside the area surrounded by the seat rail 16, the pivot frame 14, and the support pipe 17.

A power unit 24 mainly composed of the engine 2 and the transmission 3 is disposed in an area between the down pipe 13 and the pivot frame 14 below the main frame pipe 12. In the engine 2, a cylinder portion 27 is integrally coupled to an upper portion of a crankcase 26 that accommodates a crankshaft. The cylinder portion 27 stands upward from the front of the crankcase 26. The transmission 3 is provided at the rear of the crankcase 26 of the engine 2. The transmission 3 has an output shaft (not shown) for extracting the power of the engine 2 to the outside.

The front lower end of the power unit 24 is supported at the lower edge of the down pipe 13 via a bracket 30. The rear edge of the power unit 24 is supported by the left and right pivot frames 14 via the pivot plate 31. The front end portion of the swing arm 34 is pivotally supported by the left and right pivot plates 31. At the rear of the swing arm 34, an axle of the rear wheel WR is supported. The output shaft of the transmission 3 and the axle of the rear wheel WR are connected to each other so as to be able to transmit power via a drive chain or the like (not shown).
The swing arm 34 is supported by the vehicle body frame F via the cushion unit 53.

FIG. 2 is a view of the rear side area of the cylinder portion 27 of the engine 2 as viewed from the left side of the vehicle body with the covers of the vehicle body side portion removed.
As shown in FIG. 2, an intake pipe 36 for supplying air (outside air) to an intake portion of the engine 2 through an air cleaner 52 is connected to an upper portion of the cylinder portion 27 of the engine 2.
The intake pipe 36 extends from the cylinder 27 toward the rear of the vehicle on the upper side of the crankcase 26 of the engine 2. A throttle body 37 for mounting a throttle valve is interposed in the middle of the intake pipe 36.

A fuel pump 38 for supplying fuel in the fuel tank 50 to an injector (not shown) is disposed below the intake pipe 36 and on the rear side of the throttle body 37. The fuel pump 38 is disposed in a region surrounded by the crankcase 26 of the engine 2, the cylinder portion 27 of the engine 2, the intake pipe 36, and the pivot frame 14 in a side view of the vehicle.

FIG. 3 is a view of the installation portion of the fuel pump 38 as viewed from the front upper side of the vehicle with some parts removed. FIG. 4 is a view of the installation portion of the fuel pump 38 as viewed from the upper left side of the vehicle with some parts removed.
The fuel pump 38 according to the present embodiment, although not shown in detail, includes a pump body for suctioning and discharging fuel, an electric motor for driving the pump body, and a fuel filter for filtering the fuel to be sucked. The pump body, the electric motor, and the fuel filter are accommodated in a substantially cylindrical casing.

The fuel pump 38 is covered with substantially half of the outer peripheral surface by a pair of

cylindrical cover members

40L and 40U. The

cover members

40L and 40U are formed of a highly heat insulating resin material. Thus, the fuel pump 38 is protected from the heat of the engine 2.

The fuel pump 38 and the

cover members

40L and 40U covering the fuel pump 38 have a block shape which is long in one direction. The fuel pump 38 and the

cover members

40L and 40U are disposed below the intake pipe 36 so that the longitudinal direction substantially follows the vehicle width direction of the vehicle.

In the fuel pump 38, a suction pipe 43 for drawing fuel from the fuel tank 50, a supply pipe 42 for supplying the fuel pressurized by the pump body to the injector, and surplus fuel not supplied to the injector are supplied to the fuel tank 50. The return pipe 41 to be returned is connected. In the present embodiment, the suction pipe 43, the supply pipe 42, and the return pipe 41 constitute a fuel passage.

A suction nozzle 45 and a return nozzle 44 which project through the cover member 40U on the upper side and project obliquely upward at the front are provided on one side (left side in the vehicle width direction) of the fuel pump 38 in the longitudinal direction. . A suction pipe 43 is connected to the suction nozzle 45. A return pipe 41 is connected to the return nozzle 44. On one side in the longitudinal direction of the fuel pump 38 (left side in the vehicle width direction), a discharge nozzle 46 which protrudes through the cover member 40L on the lower side and protrudes forward is protruded. A supply pipe 42 is connected to the discharge nozzle 46. In the present embodiment, the suction nozzle 45, the return nozzle 44, and the discharge nozzle 46 constitute a connection portion of the fuel passage.

The

cover members

40L and 40U are held by a metal stay member 47 in a state in which the peripheral region of the fuel pump 38 is covered by the

cover members

40L and 40U. The stay member 47 is supported by the pivot frame 14 on the left side of the vehicle body frame F.

FIG. 5 is a view of the pivot frame 14 to which the stay member 47 is attached as viewed from the front left upper side. FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG.
A bracket 48 having a U-shaped cross section is fixed by welding to the left side surface of the left pivot frame 14. The bracket 48 has a pair of legs 48 a welded and fixed to the side surface of the pivot frame 14 and a support wall 48 b supported by the pair of legs 48 a. As shown in FIG. 6, bolt insertion holes 55 and locking holes 56 are formed in the support wall 48b. The bolt insertion hole 55 is a hole into which the shaft portion of the bolt 57 for fixing the base of the stay member 47 to the bracket 48 is inserted. On the back surface side of the support wall 48b, a weld nut 58 is provided, into which a bolt 57 inserted into the bolt insertion hole 55 is screwed. A hook-shaped locking claw 59 formed at the base of the stay member 47 is inserted into the locking hole 56.

The stay member 47 is configured by bending a thick metal plate into a predetermined shape. The stay member 47 has a base side fixed wall 47A fixed to the front surface of the support wall 48b of the bracket 48, and a pump holding portion 47B connected to the lower end of the base side fixed wall 47A.

The base side fixed wall 47A is formed with a bolt insertion hole 61 (see FIG. 6) into which the shaft portion of the bolt 57 is inserted and the above-mentioned locking claw 59 inserted into the locking hole 56 of the bracket 48. . In the stay member 47, the base side fixed wall 47A is fastened and fixed to the bracket 48 by the bolt 57 in a state where the locking claws 59 of the base side fixed wall 47A are inserted into the locking holes 56 of the bracket 48. Therefore, the stay member 47 is fixed to the pivot frame 14 via the bracket 48 in a state where the stay member 47 is locked by the locking claws 59 and the locking holes 56.

The pump holding portion 47B is stepped downward from the front edge portion of the pump fixing wall 47Ba in a step-like manner from the pump fixing wall 47Ba bent substantially perpendicularly to the lower end of the base side fixing wall 47A and extends forward And a locking wall 47Bc which stands upward at a substantially right angle from the front end of the extending wall 47Bb.

As shown in FIG. 7, a bolt insertion hole 61 is provided in the pump fixing wall 47 </ b> Ba.
The bolt 62 for fastening and fixing the rear edge flange 40Lf of the cover member 40L to the pump fixing wall 47Ba is inserted through the bolt insertion hole 61. A pair of

rubber bushes

63U and 63L (elastic members) are disposed above and below the rear edge flange 40Lf of the cover member 40L.
The bolt 62 is tightened by a nut 64 disposed on the lower surface side of the pump fixing wall 47Ba in a state of penetrating the upper and

lower rubber bushes

63U and 63L and the rear edge flange 40Lf. As a result, the rear edge flange 40Lf of the cover member 40L is nipped and fixed by the pump fixing wall 47Ba of the stay member 47.

The fuel pump 38 is held by the upper and

lower cover members

40U and 40L while being surrounded by the upper and

lower cover members

40U and 40L. The upper and

lower cover members

40U and 40L are fixed to each other by concavo-convex engagement, screwing, or the like. Therefore, the rear side of the fuel pump 38 is fixed to the pump fixing wall 47Ba of the stay member 47 via the rear edge flange 40Lf of the cover member 40L and the

rubber bushes

63U and 63L.

As shown in FIG. 7, the extending wall 47Bb of the stay member 47 straddles the lower side of the cover member 40L to the front side, and extends to the front end portion of the cover member 40L. A through hole 65 is provided in the locking wall 47Bc of the stay member 47. A rubber bush 66 (elastic member) is attached to the through hole 65.

The locking wall 47Bc of the stay member 47 faces the front surface of the front wall 40La which stands upward from the front end of the cover member 40L. One end of the rubber bush 66 is in contact with the front wall 40La of the cover member 40L in that state. Thus, the front wall 40La of the cover member 40L is elastically locked to the locking wall 47Bc of the stay member 47. Therefore, the front side of the fuel pump 38 is locked to the locking wall 47Bc of the stay member 47 via the front wall 40La of the cover member 40L and the rubber bush 66.

As described above, in the motorcycle 1 of the present embodiment, the fuel pump 38 is supported by the stay member 47 extending forward from the pivot frame 14 (body frame F), and is surrounded by the engine 2 and the intake pipe 36 in a vehicle side view. Are located in a large area. Therefore, in the motorcycle 1 of the present embodiment, the fuel pump 38 can be disposed on the vehicle body with a high degree of freedom at a position close to the intake pipe 36.

Further, in the motorcycle 1 of the present embodiment, the fuel pump 38 is disposed below the intake pipe so that the longitudinal direction of the fuel pump 38 extends in the vehicle width direction, and A certain suction nozzle 45, return nozzle 44, and discharge nozzle 46 are disposed to be biased to one side (left side) in the vehicle width direction. Therefore, the connection portion of the fuel passage of the fuel pump 38 can be concentrated on one side below the intake pipe 36 in the vehicle width direction. Therefore, when this configuration is adopted, the piping work of the suction pipe 43, the return pipe 41, and the supply pipe 42 can be easily performed, and the appearance of the pipe from the outside can be improved.

Furthermore, in the motorcycle 1 of the present embodiment, since the circumferential area of the fuel pump 38 is covered by the heat insulating

cover members

40L and 40U, the heat of the engine 2 directly acts on the fuel pump 38 as a heat insulating property. Can be interrupted by the

cover members

40L and 40U. Therefore, when this configuration is adopted, the fuel pump 38 can be protected from the heat of the engine 2.

Further, in the motorcycle 1 of the present embodiment, the fuel pump 38 is supported in a floating state by the stay member 47 via the plurality of

rubber bushes

63U, 63L, 66 (elastic members). For this reason, it is possible to suppress transmission of the vibration input from the vehicle body frame F to the stay member 47 during traveling of the vehicle or the like to the fuel pump 38. Therefore, when this configuration is adopted, it is possible to prevent the fuel pump 38 from being adversely affected by the vibration of the vehicle.

Further, in the motorcycle 1 of the present embodiment, the fuel pump 38 is surrounded by the crankcase 26 of the engine 2, the cylinder portion 27 of the engine 2, the intake pipe 36, and the pivot frame 14 in a vehicle side view. Are located in the Therefore, the fuel pump 38 can be protected from the surroundings by the crankcase 26, the cylinder portion 27, the intake pipe 36 and the pivot frame 14.

FIG. 8 is a view showing another embodiment, and is a view of the pivot frame 14 to which the stay member 147 is attached as viewed from the front left upper side.
The basic configuration of the motorcycle of this embodiment is substantially the same as the configuration of the above embodiment, but the structure of the stay member 147 itself and the attachment structure of the stay member 147 to the vehicle body frame F are different from the above embodiment ing. In FIG. 8, the same parts as those in the above embodiment are denoted by the same reference numerals.

The stay member 147 has a first stay 147A fixed to the pivot frame 14 and a second stay 147B locking the front side of the fuel pump. The first stay 147A and the second stay 147B are fixed to each other by the fastening member 70.

Rubber bushes

63U and 63L for holding and fixing the rear edge portion of the fuel pump and the cover member are held by the fastening and fixing portions of the first stay 147A and the second stay 147B. In the case of this embodiment, the first stay 147A is directly fixed to the pivot frame 14 without the intervention of a bracket.

The motorcycle of this embodiment has the same basic configuration as that of the above-described embodiment, and therefore, substantially the same effect as that of the above-described embodiment can be obtained. Furthermore, in the present embodiment, the first stay 147A and the second stay 147B, which are separate members, are combined to constitute the stay member 147. For this reason, it is possible to easily cope with fuel pumps of various specifications by changing and combining the shapes and sizes of the first stay 147A and the second stay 147B.
In the present embodiment, the stay member 147 is composed of two members, the first stay 147A and the second stay 147B, but the stay member may be composed of three or more members.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention.

In one modification of the embodiment, the motorcycle 1 includes a fuel pump plate 70 that supports the fuel pump 38 in the left-right direction. The fuel pump plate 70 includes a left fuel pump plate 70L and a right fuel pump plate 70R.

FIG. 9 is a left side view showing a fuel pump plate 70L according to a modification of the embodiment. FIG. 11 is a perspective view showing a fuel pump plate 70L according to a modification of the embodiment. FIG. 11 shows an example in which a fuel pump plate 70L is applied to the installation portion of the fuel pump 38 shown in FIG. As shown in FIGS. 9 and 11, the fuel pump plate 70L is provided on the left side of the fuel pump 38 in the vehicle width direction. The fuel pump plate 70L is attached to the pivot frame 14 of the vehicle body frame F by a bolt 71 or the like. The fuel pump plate 70L covers a part of the left side surface of the fuel pump 38 from the left side in the vehicle width direction and supports the fuel pump 38.

The fuel pump plate 70L has a shape that is larger than the outer diameter of the left end of the fuel pump 38 (the left end of the tubular member 38A of the fuel pump 38). In one example, fuel pump plate 70L includes a fuel pump support 70La. The fuel pump support 70La has an annular shape. An opening 70Lb is provided at a central portion of the fuel pump support 70La. The fuel pump plate 70L is arranged such that the fuel pump support 70La entirely surrounds the left end of the fuel pump 38 in the circumferential direction.

FIG. 10 is a right side view showing a fuel pump plate 70R according to a modification of the embodiment. As shown in FIG. 10, the fuel pump plate 70R is provided on the right side of the fuel pump 38 in the vehicle width direction. The fuel pump plate 70R is attached to the pivot frame 14 of the vehicle body frame F by a bolt 72 or the like. The fuel pump plate 70R is inserted into a portion of the fuel pump 38 and supports the fuel pump 38.

According to the modification of the embodiment, the motorcycle 1 includes a fuel pump plate 70 attached to the vehicle body frame F and supporting the fuel pump 38 in the left-right direction. In this configuration, the casing of the fuel pump 38 is firmly supported in the left-right direction by the fuel pump plate 70 attached to the vehicle body frame F. Therefore, the fuel pump 38 can be firmly supported in the left and right direction.

The saddle-ride type vehicle according to the present invention is not limited to motorcycles (including motorbikes and scooter-type vehicles), but also three-wheeled vehicles (in addition to small vehicles of one front wheel and two rear wheels), front two wheels and one rear wheel Also includes small vehicles of four wheels or four wheels.

1 ... Motorcycle (sliding type vehicle)
2. Engine 14 Pivot frame 26 Crankcase 27 Cylinder part 34 Swing arm 36 Intake piping 38

Fuel pump

40L, 40U Cover member 41 Return piping (fuel passage)
42 ... Supply piping (fuel passage)
43 ... Intake piping (fuel passage)
44 ... Return nozzle (connection)
45 ... Suction nozzle (connection)
46: Discharge nozzle (connection part)
47, 147 ... Stay

members

63 U, 63 L, 66 ... Rubber bush (elastic member)
70 Fuel pump plate F Body frame

Claims

Body frame and
An engine mounted on the body frame;
Intake piping for supplying air to the engine;
A fuel pump for supplying fuel to the engine;
The fuel pump is supported by a stay member extending from the vehicle body frame, and is disposed in an area surrounded by the engine and the intake pipe in a side view of the vehicle.
The fuel pump is disposed such that the longitudinal direction of the fuel pump is substantially along the vehicle width direction of the vehicle and below the intake pipe.
The saddle-ride type vehicle according to claim 1, wherein a connection portion of a fuel passage of the fuel pump is disposed to be biased to one side in a vehicle width direction.
The straddle-type vehicle according to claim 1, wherein the fuel pump is covered by a heat insulating cover member.
The saddle-ride type vehicle according to any one of claims 1 to 3, wherein the fuel pump is supported by the stay member via an elastic member.
The saddle-ride type vehicle according to any one of claims 1 to 4, wherein the stay member is configured by combining a plurality of members.
The engine is
A crankcase that houses a crankshaft;
And a cylinder portion which is erected upward from the front side of the crankcase;
The intake pipe extends from the cylinder portion toward the rear side of the vehicle above the crankcase.
The body frame includes a pivot frame supporting a swing arm on the rear side of the engine,
The fuel pump is disposed in an area surrounded by the crankcase, the cylinder portion, the intake pipe, and the pivot frame in a side view of the vehicle. The saddle-ride type vehicle described in.