JP2020051414A - Saddle type vehicle - Google Patents

Abstract

To provide a saddle type vehicle capable of gaining the time until water enters a canister in a case where the vehicle is flooded.SOLUTION: A motorcycle 1 comprises a fuel tank 40, a canister 50 that collects evaporated fuel inside the fuel tank 40, a drain hose 54 extending from the canister 50, and a chamber member 19 provided in the vehicle. A drain open end 54a that is a terminal of the drain hose 54 is connected to the chamber member 19 at a position lower than the canister 50. The chamber member 19 has a sealing part 19e sealed at a position above a drain open end connection part 19c, and an atmosphere opening hole 19h that is opened to the atmosphere at a position below the drain open end connection part 19c.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a straddle-type vehicle.

  For example, Patent Literature 1 discloses a structure in which a motorcycle includes a canister that collects evaporated fuel in a fuel tank. The canister is arranged below a motorcycle (vehicle). A drain hose for discharging fuel and water droplets to the outside is connected to the canister. The drain hose extends downward from the canister.

JP 2010-229960 A

  By the way, when the canister is arranged below the vehicle, when the vehicle is flooded by heavy rain or the like, the canister is easily flooded. If the drain hose extends downward from the canister, there is a high possibility that water will enter the canister along the drain hose when the vehicle is flooded.

  Therefore, an object of the present invention is to increase the time required for water to enter the canister when the vehicle is flooded in a straddle-type vehicle.

As a means for solving the above-mentioned problem, the invention described in claim 1 includes a fuel tank (40), a canister (50) for collecting fuel vapor inside the fuel tank (40), and a canister (50). A drain hose (54) that extends and a chamber member (19) provided in the vehicle (1) are provided, and a drain open end (54a) that is a terminal of the drain hose (54) is connected to the chamber member (19). The chamber member (19) is connected at a position below the canister (50), and the chamber member (19) is closed at a position above the connection portion (19c) to which the drain open end (54a) is connected. A straddle-type vehicle comprising: a portion (19e); and an open-to-atmosphere hole (19h) that is open to the atmosphere at a position below the connection portion (19c).
The invention described in claim 2 is characterized in that the opening area (A1) of the air opening hole (19h) is smaller than the internal sectional area (A2) of the chamber member (19).
The invention described in claim 3 is characterized in that the air opening hole (19h) is open downward or rearward of the vehicle (1).
The invention described in claim 4 is characterized in that the chamber member (19) is a pipe member (19) constituting a body frame (11).
In the invention described in claim 5, the vehicle body frame (11) includes a pair of left and right main members (13) extending in the front-rear direction and a cross member (19) connecting the pair of left and right main members (13). The cross member (19) is formed to be curved so as to be convex downward, the pipe member (19) is the cross member (19), and the air opening hole (19h) is The connection part (19c) is arranged near the apex of the curve, and is arranged at a position offset to the outside in the vehicle width direction from the atmosphere opening hole (19h).

According to the invention described in claim 1, since the drain open end, which is the terminal of the drain hose, is connected to the chamber member at a position below the canister, even if the water depth is such that the canister is flooded. Until the inside of the chamber member is filled with water, the water does not reach the canister via the drain hose. Therefore, when the vehicle is flooded, it is possible to gain time until water enters the canister. In addition, since the chamber member has a sealed portion that is sealed at a position above the connection portion to which the drain open end is connected, the internal pressure is maintained even when water enters the chamber member. Therefore, the permeation of water itself into the chamber member can be delayed. In addition, since the chamber member has an atmosphere opening hole that is opened to the atmosphere at a position below the connection portion, water that has entered the chamber member can be drained as quickly as possible through the air opening hole.
According to the invention described in claim 2, since the opening area of the air opening hole is smaller than the internal cross-sectional area of the chamber member, the amount of water that enters the chamber member from the air opening hole can be reduced, and the inside of the chamber member is reduced. You can earn time to fill with water. Therefore, even when the vehicle is flooded, the time until water enters the canister can be further increased.
According to the third aspect of the present invention, the following effects can be obtained by opening the atmosphere opening hole toward the lower side or the rear side of the vehicle. When the atmosphere opening hole is opened toward the lower side of the vehicle, the water in the chamber member is easily drained as compared with the case where the atmosphere opening hole is opened above the vehicle. Further, when the air opening hole is opened toward the rear of the vehicle, water is less likely to enter the chamber member from the air opening hole than when the air opening hole is opened in front of the vehicle.
According to the invention described in claim 4, since the chamber member is a pipe member constituting the vehicle body frame, it is not necessary to separately provide a special part (special product) as the chamber member. It can be compact.
According to the invention described in claim 5, the vehicle body frame includes a pair of left and right main members extending in the front-rear direction, and a cross member connecting the pair of left and right main members, and the cross member is convex downward. The pipe member is a cross member, the atmosphere opening hole is arranged near the vertex of the curve, and the connection portion is arranged at a position offset from the atmosphere opening hole to the outside in the vehicle width direction. By doing so, the following effects can be obtained. By utilizing the downward curved shape of the cross member originally provided in the vehicle body frame, the atmosphere opening hole and the connection portion can be effectively arranged.

FIG. 2 is a left side view of the motorcycle according to the embodiment. FIG. 2 is a right side view of a lower portion of the motorcycle according to the embodiment. FIG. 3 is a cross-sectional view taken along a line III-III of FIG. 2 (a cross-sectional view cut along a vertical plane passing through the center of a widthwise extending portion in side view).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, directions such as front, rear, left and right in the following description are the same as those in a vehicle described below unless otherwise specified. Further, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left side of the vehicle, and an arrow UP indicating the upper side of the vehicle are shown at appropriate places in the drawings used in the following description.

<Whole vehicle>
FIG. 1 shows a unit swing type motorcycle 1 as an example of a straddle-type vehicle. Referring to FIG. 1, a motorcycle 1 includes a front wheel 3 and a rear wheel 4. The front wheel 3 is steered by the steering wheel 2. The rear wheel 4 is driven by a power unit 10 (swing unit) including a power source. Hereinafter, the motorcycle may be simply referred to as “vehicle”. The motorcycle 1 has a step floor 9 on which an occupant sitting on a seat 8 places his / her feet. The motorcycle 1 of the embodiment is a scooter type vehicle.

  The steering system components including the steering wheel 2 and the front wheel 3 are steerably supported by a head pipe 12 at the front end of the body frame 11. The outer periphery of the body frame 11 is covered with a body cover 20. In FIG. 1, reference numeral 6 denotes a front fork, and reference numeral 7 denotes a rear cushion.

  A bridge 15 is erected above the left and right front forks 6. A stem pipe 16 is provided upright at the center of the bridge 15 in the vehicle width direction. The stem pipe 16 is fitted and supported on the head pipe 12 so as to be steerable. Thereby, the front fork 6 is steerably supported by the head pipe 12. A handle 2 extending in the vehicle width direction is attached to an upper portion of the stem pipe 16 so that a driver (occupant) can grasp the handle.

  The body frame 11 is formed by integrally joining a plurality of types of steel materials by welding or the like. The body frame 11 includes a head pipe 12, a main frame 13 (main member), a cross pipe 19 (cross member), and a rear frame 14.

The head pipe 12 is arranged at a front part of the vehicle. In a side view, the head pipe 12 is inclined such that the upper end of the head pipe 12 is located rearward and the lower end of the head pipe 12 is located forward. The head pipe 12 is located at a front end of the body frame 11.
The left and right main frames 13 are provided. The main frame 13 includes a lower extension 13a that extends obliquely rearward and downward from the head pipe 12, and a rear extension 13b that curves from the lower extension 13a and extends rearward. . The downward extension 13a and the rear extension 13b are integrally formed of the same member.

  The cross pipe 19 connects the left and right main frames 13. As shown in FIG. 3, the cross pipe 19 extends in the vehicle width direction so as to extend between the left and right main frames 13 in the vehicle width direction. The cross pipe 19 includes a widthwise extending portion 19a extending in the vehicle width direction, and an upper extending portion 19b which curves from the widthwise extending portion 19a and extends obliquely upward. The upper extending portion 19b is provided as a pair of left and right sides. In a cross-sectional view (front view), the upper extension 19b is such that the upper end of the upper extension 19b is located outward in the vehicle width direction, and the lower end of the upper extension is located inward in the vehicle width direction. It is inclined. The width direction extending portion 19a and the upward extending portion 19b are integrally formed of the same member.

  The left and right rear frames 14 (see FIG. 1) are provided. As shown in FIG. 1, the rear frame 14 curves from the rear end of the main frame 13 and extends obliquely rearward and upward. A cross member (not shown) extending in the vehicle width direction is provided at an appropriate position of the left and right rear frames 14 so as to extend between the left and right rear frames 14 in the vehicle width direction.

The power unit 10 includes an engine 30 that is an internal combustion engine, and a power transmission mechanism 35 that transmits rotational power of the engine 30 to rear wheels.
The engine 30 includes a crankcase 31 and a cylinder 32 connected to the crankcase 31 and protruding forward and upward.
For example, the power transmission mechanism 35 includes a belt-type continuously variable transmission mechanism. The rotational power of the engine 30 is appropriately decelerated via the power transmission mechanism 35 and transmitted to the rear wheels 4.

  The power unit 10 is supported on the vehicle body frame 11 via a link member 36 provided at a front lower end portion of the crankcase 31 so as to be vertically swingable. Between the rear end of the power unit 10 and the rear of the rear frame 14, a rear cushion 7 for damping the swing of the power unit 10 is interposed. Above the power unit 10, an intake system component such as an air cleaner 37 is provided.

  The vehicle body cover 20 includes a body cover 21, a leg shield 22, and a handle cover 23. For example, the vehicle body cover 20 is made of resin.

  The body cover 21 extends from the rear portion of the step floor 9 arranged in a substantially horizontal state, and covers the rear portion of the vehicle body. Above the body cover 21, a seat 8 on which a driver sits is provided. The body cover 21 covers a portion below the seat 8. A rear fender 27 is provided at the rear of the body cover 21 so as to extend rearward and downward. Above the front wheel 3, a front fender 17 is provided. The front fender 17 is fixed to the bridge 15.

  The leg shield 22 is erected from the front end of the step floor 9 so as to cover the legs of the driver sitting on the seat 8 from the front. The leg shield 22 covers the entire circumference of the head pipe 12 and the like. The leg shield 22 includes a front cover 22a that is located on the front side and forms the front surface of the leg shield 22, and an inner cover 22b that is located on the rear side of the front cover 22a and forms the rear surface of the leg shield 22. .

  The handle cover 23 is provided above the leg shield 22. The handle cover 23 covers the vicinity of the center of the handle 2 in the vehicle width direction so as to expose a handle grip and an operation lever (for example, a brake lever) gripped by the driver.

<Body lower structure>
As shown in FIG. 2, a fuel tank 40 for storing fuel used by the engine 30 is disposed below the vehicle. The fuel tank 40 is disposed in a space 39 between the left and right main frames 13 in the vehicle width direction. The fuel tank 40 is connected to the left and right main frames 13 via a bracket (not shown).

The fuel tank 40 includes a tank body 41 which is a fuel container, and a fuel supply pipe 42 having a fuel supply port (not shown).
In a side view, the tank body 41 extends in the front-rear direction so as to overlap the rear extension 13 b of the main frame 13.
In a side view, the fuel supply pipe 42 extends in the up-down direction along the lower extension 13 a of the main frame 13. The oil supply pipe 42 extends upward from the upper front part of the tank body 41. The refueling port of the refueling pipe 42 is removably closed by a refueling cap 43.

  A canister 50 that collects fuel vapor inside the fuel tank 40 is disposed below the vehicle. The canister 50 is for adsorbing the fuel evaporated in the fuel tank 40 and using the adsorbed fuel for combustion when the engine 30 is operating. The canister 50 has a cylindrical shape. For example, a fuel collector (not shown) made of activated carbon or the like is provided inside the canister 50.

  When viewed from the side, the canister 50 extends in the front-rear direction so as to overlap the rear extension 13 b of the main frame 13. The rear part of the canister 50 overlaps with the cross pipe 19 in a side view. As shown in FIG. 3, the canister 50 is arranged near the right upper extension 19 b of the cross pipe 19.

As shown in FIG. 2, the fuel tank 40 is provided with a gas discharge passage 44 for discharging the fuel vapor in the fuel tank 40 to the outside of the fuel tank 40. A charge hose 51 connected to the gas discharge passage 44 of the fuel tank 40 and a purge hose 52 connected to the intake system of the engine 30 are connected to one axial end (front end) of the canister 50. At the other end (rear end) in the axial direction of the canister 50, an open hose 53 (atmosphere opening passage) for communicating a fuel collecting portion (not shown) in the canister 50 with the atmosphere, and discharges fuel and water droplets to the outside. The drain hose 54 is connected.
Reference numeral 49 in the figure denotes a side stand provided on the left side of the vehicle body.

The drain open end 54a, which is the terminal of the drain hose 54, is connected to the cross pipe 19, which is a chamber member, at a position below the canister 50. In a side view, the drain hose 54 has a U-shape that opens forward. As shown in FIG. 3, the drain hose 54 has an upper end (a connection end with the canister 50) located inward in the vehicle width direction, and a lower end (a connection end with the cross pipe 19, a drain open end 54a). It is inclined so as to be located outward in the width direction.
In FIG. 3, reference numeral 29 denotes a muffler arranged on the right side of the vehicle.

  The cross pipe 19 has a sealing portion 19e which is sealed at a position above a connection portion to which the drain open end 54a is connected (hereinafter also referred to as a "drain open end connection portion 19c"). The upper part of the upper extension of the cross pipe 19 is curved along the rear extension 13 b of the main frame 13 having an annular cross section. For example, the upper portion of the upper extension of the cross pipe 19 is welded to the inner side of the rear extension 13b of the main frame 13 in the vehicle width direction.

  The cross pipe 19 has an air opening hole 19h that is open to the atmosphere at a position below the drain open end connection portion 19c. The opening area A1 of the atmosphere opening hole 19h is smaller than the internal cross-sectional area A2 of the cross pipe 19 (A1 <A2). A symbol A2 in the drawing indicates the internal cross-sectional area of the widthwise extending portion 19a of the cross pipe 19 having an annular cross section.

  The atmosphere opening hole 19h is open toward the rear of the vehicle. The atmosphere opening hole 19h is provided on a rear wall of the cross pipe 19 in the widthwise extending portion 19a. The atmosphere opening hole 19h is not provided on the front wall of the widthwise extending portion 19a of the cross pipe 19.

  The cross pipe 19 is formed to be curved so as to project downward. The atmosphere opening hole 19h is arranged near the vertex of the curve. In other words, the atmosphere opening hole 19h is arranged near the center in the width direction of the width direction extending portion 19a of the cross pipe 19. The drain open end connection portion 19c is arranged at a position offset to the outside in the vehicle width direction from the air release hole 19h.

  The drain open end connection portion 19c is arranged on the opposite side of the side stand 49 (see FIG. 2) in the vehicle width direction. That is, the drain open end connection portion 19c is provided on the right side of the vehicle body. Thus, when the side stand 49 is used (for example, when the vehicle is stopped), the height difference (up and down interval) between the drain open end connection portion 19c and the atmosphere opening hole 19h can be made larger than when the side stand 49 is not used.

  The cross pipe 19 has a second atmosphere opening hole 19i arranged at a position different from the atmosphere opening hole 19h. The opening area of the second atmosphere opening hole 19i is substantially the same as the opening area A1 of the atmosphere opening hole 19h. The second atmosphere opening hole 19i is open downward of the vehicle. The second atmosphere opening hole 19i is provided on a lower wall of the cross pipe 19 in the widthwise extending portion 19a. The second atmosphere opening hole 19i is not provided on the upper wall of the widthwise extending portion 19a of the cross pipe 19.

  The second atmosphere opening hole 19i is arranged offset to the side stand 49 side with respect to the center in the vehicle width direction. This makes it easy to drain water and gasoline even when the side stand is parked.

As described above, the motorcycle 1 of the above embodiment is provided in the vehicle with the fuel tank 40, the canister 50 for collecting the fuel vapor inside the fuel tank 40, the drain hose 54 extending from the canister 50, and the vehicle. A drain opening end 54a, which is a terminal of the drain hose 54, is connected to the chamber member 19 at a position below the canister 50, and the chamber member 19 is connected to the drain opening end connecting portion 19c. It has a sealing portion 19e sealed at an upper position and an atmosphere opening hole 19h opened to the atmosphere at a position below the drain open end connection portion 19c.
According to this configuration, since the drain open end 54a, which is the terminal of the drain hose 54, is connected to the chamber member 19 at a position lower than the canister 50, even if the water depth is such that the canister 50 is flooded. Until the inside of the chamber member 19 is filled with water, the water does not reach the canister 50 via the drain hose 54. Therefore, it is possible to gain time until water enters the canister 50 when the vehicle is flooded. In addition, the chamber member 19 has a sealed portion 19e which is sealed at a position above the drain open end connection portion 19c, so that even when water enters the chamber member 19, the internal pressure is maintained. Therefore, the permeation of water itself into the chamber member 19 can be delayed. In addition, the chamber member 19 has the air opening hole 19h that is open to the atmosphere at a position below the drain open end connection portion 19c, so that water that has entered the chamber member 19 can be passed through the air opening hole 19h. Can be pulled out quickly.

  In the above embodiment, since the opening area A1 of the atmosphere opening hole 19h is smaller than the internal cross-sectional area A2 of the chamber member, the amount of water entering the chamber member 19 from the atmosphere opening hole 19h can be reduced. You can earn time to fill with water. Therefore, even when the vehicle is flooded, the time until water enters the canister 50 can be further increased.

  In the above-described embodiment, since the air opening hole 19h is open toward the rear of the vehicle, the air opening hole 19h enters the chamber member 19 from the air opening hole 19h as compared with the case where the air opening hole is opened forward of the vehicle. It is hard for water to enter. In addition, since the second atmosphere opening hole 19i is opened toward the lower side of the vehicle, the water in the chamber member 19 is easily drained as compared with the case where the atmosphere opening hole is opened above the vehicle.

  In the above embodiment, since the chamber member 19 is the pipe member 19 constituting the body frame 11, there is no need to separately provide a special component (special product) as the chamber member, so that the cost is reduced and the vehicle is made compact. be able to.

  In the above-described embodiment, the body frame 11 includes a pair of left and right main frames 13 extending in the front-rear direction and a cross pipe 19 connecting the pair of left and right main frames 13, and the cross pipe 19 is formed to project downward. The pipe member 19 is a cross pipe 19 which is formed to be curved, the air opening hole 19h is disposed near the apex of the curve, and the drain open end connection portion 19c is located outside the air opening hole 19h in the vehicle width direction. The following effects can be achieved by being arranged at a position offset from the. By utilizing the downward curved shape of the cross pipe 19 originally provided in the vehicle body frame 11, the atmosphere opening hole 19h and the drain open end connection portion 19c can be effectively arranged.

<Modification>
In the above-described embodiment, the example in which the chamber member is the cross pipe 19 constituting the vehicle body frame 11 has been described, but the invention is not limited thereto. For example, the chamber member may be a body cover 21 constituting the vehicle body cover 20. For example, a portion for inserting the drain open end 54a into the body cover 21 may be provided.

  In the above-described embodiment, the example in which the air opening hole 19h is arranged near the center in the width direction of the width direction extending portion 19a of the cross pipe 19 has been described. For example, the atmosphere opening hole 19h may be provided on a widthwise outside portion of the widthwise extending portion 19a of the cross pipe 19. That is, the air opening hole 19h may be arranged at a position lower than the drain open end connection portion 19c.

  In the above embodiment, the cross pipe 19 has been described with an example having the atmosphere opening hole 19h opening toward the rear of the vehicle and the second atmosphere opening hole 19i opening toward the bottom of the vehicle. Not limited to this. For example, the cross pipe 19 may have one of the air opening hole 19h and the second air opening hole 19i. That is, the atmosphere opening hole 19h may be open downward or backward of the vehicle.

  In FIG. 2, reference numeral VL indicates a virtual vertical line passing through the center of the widthwise extending portion 19a in a side view, and reference numeral HL indicates a virtual horizontal line passing through the center of the widthwise extending portion 19a in a side view. It is desirable that the open-to-atmosphere hole is opened behind the virtual vertical line and below the virtual horizontal line (within the range of the arrow in FIG. 2).

  In the above embodiment, an example was described in which the canister 50 was applied to a scooter type vehicle, but the present invention is not limited to this. For example, the canister 50 may be applied to a vehicle other than a scooter type vehicle such as a motorcycle.

Note that the present invention is not limited to the above-described embodiment. For example, the saddle-ride type vehicle includes all vehicles in which a driver rides across a vehicle body, and includes a motorcycle (a motor-driven bicycle and a scooter type vehicle). ) As well as three-wheeled vehicles (including two front wheels and one rear wheel in addition to one front and two rear wheels). The present invention is applicable not only to motorcycles but also to four-wheel vehicles such as automobiles.
The configuration in the above embodiment is an example of the present invention, and various changes can be made without departing from the gist of the present invention, such as replacing the component of the embodiment with a known component.

1 motorcycles (saddle-riding type vehicles)
11 Body frame 13 Main frame (main member)
19 Cross pipe (chamber member, pipe member)
19c Drain open end connection part (connection part)
19e Sealing part 19h Air opening hole 19i Second air opening hole 40 Fuel tank 50 Canister 54 Drain hose 54a Drain opening end A1 Opening area of air opening hole A2 Internal cross-sectional area of cross pipe (chamber member)

Claims (5)

A fuel tank (40),
A canister (50) for collecting fuel vapor inside the fuel tank (40);
A drain hose (54) extending from the canister (50);
A chamber member (19) provided in the vehicle (1),
A drain open end (54a), which is an end of the drain hose (54), is connected to the chamber member (19) at a position below the canister (50),
The chamber member (19)
A sealing portion (19e) sealed at a position above a connection portion (19c) to which the drain open end (54a) is connected;
A straddle-type vehicle having an atmosphere opening hole (19h) that is opened to the atmosphere at a position below the connection portion (19c).   The straddle-type vehicle according to claim 1, wherein an opening area (A1) of the atmosphere opening hole (19h) is smaller than an internal cross-sectional area (A2) of the chamber member (19).   The straddle-type vehicle according to claim 1 or 2, wherein the atmosphere opening hole (19h) opens downward or rearward of the vehicle (1).   The straddle-type vehicle according to any one of claims 1 to 3, wherein the chamber member (19) is a pipe member (19) constituting a body frame (11). The body frame (11)
A pair of left and right main members (13) extending in the front-rear direction;
A cross member (19) connecting the pair of left and right main members (13).
The cross member (19) is formed to be curved so as to be convex downward,
The pipe member (19) is the cross member (19),
The air opening hole (19h) is arranged near a vertex of the curve,
The straddle-type vehicle according to claim 4, wherein the connection portion (19c) is disposed at a position offset from the atmosphere opening hole (19h) outward in the vehicle width direction.

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