JP5291501B2 - Motorcycle canister arrangement structure - Google Patents

Abstract

The invention provides an adsorption tank arrangement structure of an automatic bicycle(10), capable of making the vehicle body compact and shortening a pipe connected with the adsorption tank. A motor (27) is mounted on a vehicle frame (11) and a carburettor (45) is arranged behind the motor (27) and an air filter (47) is arranged behind the carburettor and connected with the carburettor (45) by a connection pipe (46); a fuel tank (25) is arranged above the motor (27) and the carburettor (45) and the evaporated fuel in the fuel tank is processed by the adsorption tank (58). The vehicle frame (11) comprises a rear frame part (13c) arranged behind the motor (27) and extending along the vertical direction or the proximate vertical direction and the connection pipe (46) is arranged at the side of the rear frame part (13c) and the adsorption tank (58) is arranged below the connection pipe (46).

Description

  The present invention relates to an improvement in a canister arrangement structure for a motorcycle.

  As a conventional canister arrangement structure for a motorcycle, a structure in which a canister is provided so as to be adjacent to an intake system component of an engine is known (for example, see Patent Document 1).

  According to FIGS. 1 to 3 of Patent Document 1, a carburetor 12 is attached to the rear portion of the cylinder portion of the engine body 8 via an intake pipe 11, and an intake silencer box 14 is connected to the rear portion of the carburetor 12. A canister 21 is attached to the lower surface of the intake silencer box 14.

The canister 21 is disposed so that the longitudinal direction extends in the vehicle width direction, and includes a discharge port 23 for discharging evaporated fuel into the intake pipe 11. The discharge port 23 and the intake pipe 11 are connected by a purge pipe 26. Has been.
The purge pipe 26 is piped along a frame extending from the canister 21 side and extending substantially vertically above and below the vehicle body frame 1 and a frame extending horizontally, and is connected to the intake pipe 11.

JP-A-56-53971

  The purge pipe 26 first extends outward in the vehicle width direction from the discharge port 23 provided at the end of the canister 21 and then extends upward on the side of the side surface of the intake silencer box 14. It protrudes outward in the vehicle width direction from the side surface of the sound box 14, and it is difficult to make it compact in the vehicle width direction.

  Further, since the canister 21 is disposed below the intake silencer box 14, the purge pipe 26 is long, and the handling becomes complicated, and there are still problems in terms of cost and assembly.

  An object of the present invention is to provide a canister arrangement structure for a motorcycle capable of shortening a pipe connected to the canister while making the vehicle body compact.

According to the first aspect of the present invention, an engine is attached to a vehicle body frame, a fuel supply device is disposed behind the engine, an air cleaner is disposed behind the fuel supply device, and the air cleaner and the fuel supply device are connected to a connecting tube. In a canister arrangement structure for a motorcycle in which a fuel tank is arranged above the engine and the fuel supply device, and the evaporated fuel in the fuel tank is processed by the canister, the vehicle body frame is arranged vertically or vertically behind the engine. With a vertically extending portion extending in a direction close to the direction, a connecting tube is provided on the side of the vertically extending portion, a canister is disposed below the connecting tube, and the vertically extending portion is the center in the vehicle width direction of the vehicle The fuel supply device and the connecting tube Disposed laterally, canister, characterized in that it is arranged so as to overlap the connecting tube in plan view.

According to a second aspect of the present invention , an engine is attached to a vehicle body frame, a fuel supply device is disposed behind the engine, an air cleaner is disposed behind the fuel supply device, and the air cleaner and the fuel supply device are connected to a connecting tube. In a canister arrangement structure for a motorcycle in which a fuel tank is arranged above the engine and the fuel supply device, and the evaporated fuel in the fuel tank is processed by the canister, the vehicle body frame is arranged vertically or vertically behind the engine. A vertically extending portion extending in a direction close to the direction, a connecting tube is provided on a side of the vertically extending portion, a canister is disposed below the connecting tube, an air cleaner, a fuel supply device, a connecting tube, and a canister, The side of the vehicle is covered with a single side cover It is characterized in.

  The invention according to claim 3 is characterized in that the fuel supply device is disposed in front of the vertically extending portion, and an air cleaner is disposed in the rear of the vertically extending portion.

  The invention according to claim 4 is characterized in that the pipe connecting the fuel tank and the canister is disposed so as to pass between the connecting tube and the vertically extending portion.

The invention according to claim 5 is characterized in that the connecting tube forming the intake passage between the air cleaner and the fuel supply device is provided on the outer side in the vehicle width direction of the vertically extending portion.

In the invention according to claim 1, the vehicle body frame includes a vertically extending portion that extends in the vertical direction or the direction close to the vertical direction behind the engine, the connecting tube is provided on the side of the vertically extending portion, and the canister It is arranged below the connecting tube, the vertically extending part is arranged at the center in the vehicle width direction of the vehicle, the fuel supply device and the connecting tube are arranged on one side of the vertically extending part, and the canister Since it is arranged so as to overlap the connecting tube in plan view, the vehicle body can be made compact, and the canister can be arranged close to the fuel supply device, so the fuel supply device and the canister The piping to be connected can be shortened, and the weight can be reduced.
In addition, as described above, the vertically extending portion is disposed at the center in the vehicle width direction of the vehicle, the fuel supply device and the connecting tube are disposed on one side of the vertically extending portion, and the canister is Since the canister is arranged so as to overlap the connecting tube in plan view, the canister does not protrude greatly in the vehicle width direction, and the motorcycle can be downsized.

In the invention according to claim 2, the vehicle body frame includes a vertically extending portion extending in a vertical direction or a direction close to the vertical direction behind the engine, the connecting tube is provided on a side of the vertically extending portion, and the canister The air cleaner, the fuel supply device, the connecting tube and the canister are disposed below the connecting tube, and the side of the vehicle body is covered with an integrated side cover, so that the vehicle body can be made compact first. Since the canister can be arranged close to the fuel supply device, the pipe connecting the fuel supply device and the canister can be shortened, and the weight can be reduced.
In addition, by arranging the air cleaner, fuel supply device, connecting tube and canister in a concentrated manner, the side of the vehicle body can be covered with an integrated side cover, so that functional parts can be protected without increasing the number of parts. In addition, the appearance of the motorcycle can be improved.

  In the invention according to claim 3, since the fuel supply device is disposed in front of the vertically extending portion and the air cleaner is disposed in the rear of the vertically extending portion, the fuel supply device and the air cleaner larger than the connecting tube have a vehicle width. Protruding outward in the direction can be suppressed, and the vehicle width of the motorcycle can be reduced.

  In the invention according to claim 4, since the pipe connecting the fuel tank and the canister is disposed so as to pass between the connecting tube and the vertically extending portion, the length of the pipe connecting the fuel tank and the canister The piping can be protected and guided by the connecting tube and the vertically extending portion.

In the invention according to claim 5, the connecting tube forming the intake passage between the air cleaner and the fuel supply device is provided on the outer side in the vehicle width direction of the vertically extending portion.

1 is a left side view of a main part of a motorcycle showing a canister arrangement structure according to the present invention. 1 is a right side view of a main part of a motorcycle showing a canister arrangement structure according to the present invention. 1 is a perspective view of a first main part of a motorcycle showing a canister arrangement structure according to the present invention. FIG. 6 is a second perspective view of the main part of the motorcycle showing the canister arrangement structure according to the present invention. 1 is a plan view of a main part of a motorcycle showing a canister arrangement structure according to the present invention. 1 is a front view of a main part of a motorcycle showing a canister arrangement structure according to the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left, right, front, and rear indicate directions based on the driver who has boarded the vehicle. The drawings are to be viewed in the direction of the reference numerals.

Examples of the present invention will be described.
As shown in FIG. 1, a motorcycle 10 includes a body frame 11 having a head pipe 12 provided at a front end, a main frame 13 that extends from the head pipe 12 by being bent obliquely rearward and downward, and the main frame 13. A pivot frame 14 attached to the lower end, a pair of left and right seat rails 16 and 17 (only reference numeral 16 on the front side) extending rearward from the vicinity of the bent portion of the main frame 13, a pivot frame 14 and a seat rail 16, 17 includes a pair of left and right sub-frames 18 and 21 (only reference numeral 18 on the near side is shown), and a down frame 22 extending obliquely rearwardly downward from the head pipe 12 below the main frame 13. A fuel tank 25 is attached to the top of the frame 13, and a seat 26 is attached, the engine 27 is mounted to the pivot frame 14 and the down frame 22, the vertical swing freely swing arm 31 via a pivot shaft 28 is attached to the pivot frame 14.

  The main frame 13 is a U-shaped member, and includes a bent portion 13a, a front frame portion 13b provided in front of the bent portion 13a, and a rear frame portion 13c provided in the rear of the bent portion 13a. The front frame portion 13b is inclined so that the rear end is lower than the front end, and the rear frame portion 13c is inclined forward so that the upper end is located forward of the lower end.

The engine 27 includes a crankcase 35 and a cylinder portion 36 that extends upward from the front upper portion of the crankcase 35. The cylinder portion 36 includes a cylinder block 37 attached to the crankcase 35, and a cylinder block 37. The cylinder head 38 is attached to the upper part, and the head cover 39 covers the upper opening of the cylinder head 38.
The cylinder head 38 has an intake device 41 connected to the rear and an exhaust device 42 connected to the front.

  The intake device 41 includes an intake pipe 44 attached to the cylinder head 38, a carburetor 45 as a fuel supply device connected to the rear end of the intake pipe 44, and a connecting tube 46 at the rear end of the carburetor 45. The air cleaner 47 is connected.

  The exhaust device 42 includes an exhaust pipe 51 attached to the front part of the cylinder head 38, a catalyst 52 provided in the middle of the exhaust pipe 51, and a muffler 53 connected to the rear end part of the exhaust pipe 51. .

The fuel tank 25 is provided with an evaporated fuel processing device 55 for causing the carburetor 45 to suck and process the evaporated fuel produced by evaporating the internal fuel.
The evaporative fuel processing device 55 is a system in which HC (hydrocarbon), which is a component of evaporative fuel existing in the fuel tank 25, is sucked together with the air-fuel mixture into the intake system by the intake negative pressure of the engine 27 and burned. One end is connected to a tank-side valve (not shown) provided at the bottom 25a of 25, and a discharge pipe 57 that discharges the evaporated fuel from the fuel tank 25, and the other end of the discharge pipe 57 is connected to the evaporated fuel. A canister 58 to be introduced and stored, a purge pipe 61 having one end connected to the canister 58 and the other end connected to the carburetor 45, and one end at the seat rail 16 for introducing fresh air into the canister 58 A fresh air introduction pipe 63 which is disposed in the vicinity of the joint with the subframe 18 and is opened to the atmosphere and whose other end is connected to the canister 58; Comprising a lower end and an inner and outer from the canister 58 for communicating extends downwardly from the external communicating pipe 64. discharging the air after being purified by the canister 58 by being opened to the atmosphere outside.

  The discharge pipe 57 passes from the front end of the canister 58 to the inside of the rear frame portion 13c in the vehicle width direction, further passes between the rear frame portion 13c and the connecting tube 46, and further extends upward to extend to the bottom of the fuel tank 25. Connected to the tube protruding to 25a.

The purge pipe 61 is U-turned from the front end portion of the canister 58 and extends rearward at one end, and then extends upward and is connected to the lower portion of the carburetor 45.
The fresh air introduction pipe 63 extends rearward from the rear end portion of the canister 58, and then extends rearward and obliquely upward along the subframe 18 on the inner side in the vehicle width direction of the subframe 18. It reaches the vicinity of the joint.
The external communication pipe 64 is bent from the rear end portion of the canister 58 and extends downward.

  The above-described tank side valve has a suction port that opens to the gas phase in the fuel tank 25 and a discharge port that is connected to the discharge pipe 57 via a tube. The internal pressure of the fuel tank 25 opens when the pressure exceeds a predetermined value. The vaporized fuel is sent to the canister 58.

  The canister 58 is a container filled with activated carbon. The canister 58 is attached to the rear frame portion 13c of the main frame 13 such that its longitudinal direction extends in the front-rear direction, and is disposed below the fuel tank 25. The carburetor 45, the connecting tube 46 and the air cleaner 47 constituting the device 41 are disposed below.

  The evaporated fuel that has flowed into the canister 58 is once adsorbed by the activated carbon. When the intake negative pressure of the intake system acts on the canister 58, the evaporated fuel is released from the activated carbon and sucked into the carburetor 45 by the fresh air introduced into the canister 58 by the fresh air introduction pipe 63. .

FIG. 2 shows the right side surface of the motorcycle 10.
Most of the canister 58 is covered with a fixture 66, and this fixture 66 is attached to the side of the rear frame portion 13 c of the main frame 13.

  Specifically, the canister 58 is located on the side of the lower portion of the rear frame portion 13c and on the side of the upper end portion of the pivot frame 14, and is located below the carburetor 45, the connecting tube 46, and the air cleaner 47. Furthermore, it is located above the pivot shaft 28.

  The carburetor 45 is disposed in front of the rear frame portion 13c, and the air cleaner 47 is disposed in rear of the rear frame portion 13c. That is, the carburetor 45 and the air cleaner 47 sandwich the rear frame portion 13c in a side view. The connecting tube 46 is arranged so as to cross the side of the rear frame portion 13c.

  Therefore, when the carburetor 45 and the air cleaner 47 larger than the connecting tube 46 are viewed from the front, the carburetor 45 and the air cleaner 47 can be arranged on the inner side in the vehicle width direction so as to overlap the rear frame portion 13c. The amount of protrusion can be reduced.

As shown in FIG. 3, a carburetor 45, a connecting tube 46, an air cleaner 47, and a canister 58 are arranged close together in a space behind the engine 27 and on the right side of the vehicle body.
Therefore, maintenance of these parts can be performed collectively from the right side of the vehicle body, and maintainability can be improved.

  FIG. 4 shows that a side cover 68 that covers the carburetor 45, the connecting tube 46, the air cleaner 47, and the canister 58 is provided on the right side of the vehicle body shown in FIG.

  As described above, since the carburetor 45, the connecting tube 46, the air cleaner 47, and the canister 58 are compactly assembled on the right side of the vehicle body, the side can be covered with the small side cover 68 that is small in size.

  As shown in FIG. 5, the carburetor 45 extends rearward and obliquely rightward from the rear portion of the cylinder head 38 of the engine 27 via the intake pipe 44, and the connecting tube 46 protrudes rightward from the rear end of the carburetor 45. The curved tube extends rearward, the middle portion of the connecting tube 46 is connected to the right side of the front wall of the air cleaner 47 and the rear portion of the connecting tube 46 extends into the air cleaner 47, and the air cleaner 47 is interposed between the left and right seat rails 16, 17. Delivered and installed.

  Thus, the carburetor 45 and the connecting tube 46 constituting the intake device 41 are arranged so as to bypass the rear frame portion 13c and the pivot frame 14 of the main frame 13, and the intake device 41 is provided between the engine 27 and the air cleaner 47. In between, since it curves as a whole, the part which protrudes to the vehicle body side of the intake device 41 (the connecting tube 46 protrudes most to the vehicle body side) becomes fewer.

  In plan view, the connecting tube 46 and the canister 58 (the outline is shown by a thick line) are arranged so as to overlap, so that the amount of protrusion of the canister 58 toward the vehicle body side can be reduced. Become.

The arrow (LEFT) in FIG. 6 represents the left side of the vehicle, and the arrow (RIGHT) represents the right side of the vehicle.
As shown in FIG. 6, the canister 58 is on the right side by a distance D1 that is the same distance as the carburetor 45 or a distance close to the protruding amount of the carburetor 45 with respect to the vehicle body centerline 70 that extends vertically through the center of the vehicle width. For example, it is disposed on the inner side in the vehicle width direction by a distance D2 from a flange portion 25b provided at the lower portion of the fuel tank 25.

  In this way, by aligning the amount of protrusion of the canister 58 and the carburetor 45, which is an intake system component, to the side of the vehicle body, the shape of the side cover 68 (see FIG. 4) can be made flat and simplified. The protrusion amount of the cover 68 to the side of the vehicle body can also be suppressed.

  As shown in FIGS. 1 and 2, the engine 27 is attached to the vehicle body frame 11, a carburetor 45 as a fuel supply device is disposed behind the engine 27, and an air cleaner 47 is disposed behind the carburetor 45. The air cleaner 47 and the carburetor 45 are connected by a connecting tube 46, the fuel tank 25 is disposed above the engine 27 and the carburetor 45, and the motorcycle 10 that processes the evaporated fuel in the fuel tank 25 by the canister 58 is provided. In the canister arrangement structure, the vehicle body frame 11 is provided with a rear frame portion 13c as a vertically extending portion extending in the vertical direction or the direction close to the vertical direction behind the engine 27, and the connecting tube 46 is located on the side of the rear frame portion 13c. The canister 58 is provided with a connecting Since the canister 58 is disposed using the space below the connecting tube 46 extending in the front-rear direction, the vehicle body can be prevented from being enlarged and brought close to the carburetor 45. Since the canister 58 can be arranged, the purge pipe 61 as a pipe connecting the carburetor 45 and the canister 58 can be shortened, and the weight can be reduced.

  As shown in FIG. 5 above, the rear frame portion 13c is disposed at the center in the vehicle width direction of the vehicle, and the carburetor 45 and the connecting tube 46 are disposed on one side of the rear frame portion 13c. Since the canister 58 is disposed so as to overlap the connecting tube 46 in plan view, the canister 58 does not protrude greatly in the vehicle width direction, and the motorcycle 10 can be downsized.

  As shown in FIGS. 1 and 2, the carburetor 45 is disposed in front of the rear frame portion 13c, and the air cleaner 47 is disposed in the rear of the rear frame portion 13c. Therefore, the carburetor 45 larger than the connecting tube 46 is disposed. In addition, the air cleaner 47 can be prevented from protruding outward in the vehicle width direction, and the vehicle width of the motorcycle 10 can be reduced.

  As shown in FIG. 1 above, the discharge pipe 57 as a pipe connecting the fuel tank 25 and the canister 58 is disposed so as to pass between the connecting tube 46 and the rear frame portion 13c. Since 57 extends without being greatly bent in the vertical direction, the length of the discharge pipe 57 can be shortened. Further, the discharge pipe 57 can be protected by the connecting tube 46 and the rear frame portion 13c.

  As shown in FIGS. 1 and 4 above, the air cleaner 47, the carburetor 45, the connecting tube 46 and the canister 58 are covered with the side cover 68 having a monolithic structure on the side of the vehicle body. In addition, the appearance of the motorcycle 10 can be improved.

In this embodiment, as shown in FIG. 2, the canister 58 is arranged so that the longitudinal direction extends in the front-rear direction. However, the present invention is not limited thereto, and the canister 58 is arranged so that the longitudinal direction extends in the up-down direction. You may arrange | position along the flame | frame part 3c.
Further, the fuel supply device may be a throttle body including a fuel injection device instead of a carburetor.

  The canister arrangement structure of the present invention is suitable for a motorcycle.

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Body frame, 13c ... Vertical extension part (rear frame part), 25 ... Fuel tank, 27 ... Engine, 45 ... Fuel supply apparatus (carburetor), 46 ... Connecting tube, 47 ... Air cleaner, 57 ... Piping (discharge pipe), 58 ... Canister, 68 ... Side cover.

Claims (5)

An engine (27) is attached to the vehicle body frame (11) , a fuel supply device (45) is disposed behind the engine (27) , and an air cleaner (47) is disposed behind the fuel supply device (45) . The air cleaner (47) and the fuel supply device (45) are connected by a connecting tube (46) , and a fuel tank (25) is disposed above the engine (27) and the fuel supply device (45). In the canister arrangement structure of the motorcycle for processing the evaporated fuel in the fuel tank (25) by the canister (58) ,
The vehicle body frame (11) includes a vertically extending portion (13c) extending in a vertical direction or a direction close to the vertical direction behind the engine (27) , and the connecting tube (46) includes the vertically extending portion ( 13c), the canister (58) is disposed below the connecting tube (46) ,
The vertical extension part (13c) is disposed at the center in the vehicle width direction of the vehicle, and the fuel supply device (45) and the connecting tube (46) are provided on one side of the vertical extension part (13c). Placed on the
The canister (58) is disposed so as to overlap the connecting tube (46) in a plan view.
The canister arrangement structure for a motorcycle according to claim 1. An engine (27) is attached to the vehicle body frame (11), a fuel supply device (45) is disposed behind the engine (27), and an air cleaner (47) is disposed behind the fuel supply device (45). The air cleaner (47) and the fuel supply device (45) are connected by a connecting tube (46), and a fuel tank (25) is disposed above the engine (27) and the fuel supply device (45). In the canister arrangement structure of the motorcycle for processing the evaporated fuel in the fuel tank (25) by the canister (58),
The vehicle body frame (11) includes a vertically extending portion (13c) extending in a vertical direction or a direction close to the vertical direction behind the engine (27), and the connecting tube (46) includes the vertically extending portion ( 13c), the canister (58) is disposed below the connecting tube (46),
The air cleaner (47), the fuel supply device (45), the connecting tube (46), and the canister (58) are covered with a side cover (68) integrally formed on the side of the vehicle body.
A canister arrangement structure for a motorcycle characterized by this. The fuel supply device (45), the disposed vertically extending portion from (13c) forwardly claim 1, characterized in that the air cleaner than the vertical extending portion (13c) to the rear (47) is arranged A canister arrangement structure for a motorcycle according to claim 2. A pipe (57) connecting the fuel tank (25) and the canister (58) is disposed so as to pass between the connecting tube (46) and the vertical extension (13c). A canister arrangement structure for a motorcycle according to claim 1 or 2 . A connecting tube (46) that forms an intake passage between the air cleaner (47) and the fuel supply device (45) is provided on the outer side in the vehicle width direction of the vertically extending portion (13c). The canister arrangement structure for a motorcycle according to any one of claims 1 to 3 .

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