JP4640699B2 - Canister piping structure - Google Patents

Description

  The present invention relates to a canister piping structure, and more particularly to a canister piping structure that prevents water and snow from entering through an air opening of an air communication pipe connected to the canister.

  In the vehicle, as shown in FIG. 8, a canister 104 that adsorbs evaporated fuel generated in the fuel tank 102 is disposed under the floor 106, and the canister 104 is provided with an atmosphere communication pipe 108 provided with an atmosphere opening 108 </ b> A. There is something connected. A portion of the atmosphere opening 108 </ b> A on the front end side of the atmosphere communication pipe 108 is inserted into the rear floor member 110 below the floor 106. The atmosphere opening 108 </ b> A of the atmosphere communication pipe 108 is disposed at a position that is blocked from the room.

  Further, in the vehicle, as shown in FIG. 9, a fuel filler tube 206 connected to a fuel tank is disposed in a right tire house 204 in which a right rear tire 202 is disposed. The air communication pipe 210 is clamped along the fuel filler tube 206 so as to extend above the vehicle 208, and the air opening 210A on the front end side of the air communication pipe 210 is cut off from the interior of the floor. Some are arranged above the vehicle 208 and prevent water from entering through the air opening 210A.

2. Description of the Related Art Conventionally, in an evaporative fuel processing apparatus for a vehicle, an atmosphere opening passage is branched into a first passage for introducing outside air into a canister and a second passage for releasing a part of the evaporated fuel into the atmosphere. Some have a switching valve mechanism for switching between the first passage and the second passage.
In addition, as for the canister arrangement structure, there is a structure in which a recess toward the vehicle interior is formed in the rear wheel house inner so as to bulge, and the canister is disposed in the recess.
JP-A-6-99748 JP 63-162329 A

  Conventionally, in the piping structure of the atmospheric communication pipe shown in FIG. 8, when the atmospheric opening 108A of the atmospheric communication pipe 108 is opened into the rear floor member 110 mounted under the floor 106, the rear floor member 110 is placed under the vehicle. Since the position of the rear floor member 110 is low, the water tends to enter from the air opening 108A when the vehicle travels on the submerged channel, causing engine malfunction. It was.

  Further, in the piping structure of the atmospheric communication pipe shown in FIG. 9, when the atmospheric communication pipe 210 is attached to the fuel filler tube 206 disposed in the right rear tire house 204 with a clamp, the position of the atmospheric opening 210A is determined. As the vehicle travels on a snowy road, the snow lifted by the right tire 202 moves upward along the inner surface of the right rear tire house 204, as indicated by arrow F, and In this case, a large amount of snow accumulates on the fuel filler tube 206 having a pipe diameter D2 larger than the pipe diameter D1 of the atmosphere communication pipe 210. For this reason, a large amount of snow accumulates on the fuel filler tube 206. Is blocked by snow, and the atmosphere communication pipe 210 is connected to the fuel filler tube 206. Since it is mounted in the lamp, there is a disadvantage that positioning of the air opening 210A of the atmosphere communication pipe 210 becomes difficult.

In the canister piping structure in which a canister for adsorbing evaporated fuel generated in a fuel tank is disposed under a vehicle floor, and the canister is connected to an atmospheric communication pipe provided with an air opening. between the lining to be attached to the inner surface of the rear wheel house and the rear wheel house of the vehicle in cross section to form a space larger width than the pipe diameter of the atmosphere communication piping, on the inner wall surface of the rear tire in the house mounting brackets for mounting the shock absorber, the air communicating pipe, characterized in that the air opening and guides in the space and so as to open downwardly at above the bracket.

In the piping structure of the canister of the present invention, between the lining to be attached to the inner surface of the rear wheel house and the rear tire house of the vehicle, cross-section to form a space width greater than the pipe diameter of the atmosphere communication piping, air the communication piping, by air opening is arranged so as to open downward and guides in the space, increasing the position of the air opening, the vehicle when riding flooded road, to the atmosphere opening port it is possible to prevent the ingress of water, and between the lining and the rear tire house in cross-section so as to form a space width greater than the pipe diameter of the atmosphere communication piping, the air opening into this space Therefore, it is possible to make it difficult for snow that is swept up by the tire when traveling on a snowy road to enter the space, and to prevent the air opening from being blocked by snow.

This invention to prevent the entry of water and snow to the atmosphere opening port of the atmosphere communication piping, with a higher position of the atmospheric opening, lining and between the rear tire house in cross-section the atmosphere communication piping A space having a width larger than the tube diameter is formed, and the atmosphere opening is positioned downward in the space.
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

  1 to 5 show a first embodiment of the present invention.

  4 and 5, 2 is a vehicle, 4L is a left side frame oriented in the vehicle longitudinal direction, 4R is a right side frame facing the left side frame 4L in the vehicle longitudinal direction, 6L is a left rear tire, and 6R is A right rear tire, 8L is a left rear tire house, 8R is a right rear tire house, 10 is a rear axle, and 12 is a rear differential. The left rear tire house 8L and the right rear tire house 8R are for blocking the outside of the vehicle 2 from the passenger compartment.

  The left side frame 4 </ b> L and the right side frame 4 </ b> R are below the floor 14, and the first and second center cross members 16-1 and 16-2 ahead of the rear axle 10 and the rear axle 12. A rear cross member 18 at the rear of the vehicle is connected in the vehicle width direction (vehicle left-right direction).

  1 to 3, a left rear shock absorber 22 as a shock absorber is attached to an inner wall surface in the left rear tire house 8L via a left rear shock absorber upper bracket 20 as a bracket. The left rear lining 24, which is a lining, is mounted on the inner surface of the left rear tire house 8L.

  In this case, as shown in FIG. 1, the left rear shock absorber upper bracket 20 has a length M on the left side of the vehicle on the left rear tire 6L side at the tire house side mounting portion 26 and the upper portion of the tire house side mounting portion 26. The protruding shock absorber side mounting portion 28 includes a tire house side mounting portion 26 which is mounted on the inner wall surface of the left rear tire house 8L. An upper mounting portion 32 that is connected to the upper portion of 30 is attached. A lower mounting portion 34 connected to the lower portion of the shock absorber body 30 of the left rear shock absorber 22 is connected to an arm 35 that supports the left rear tire 6L.

  Further, in the left rear shock absorber upper bracket 20, the intrusion prevention surface 36 extending in the horizontal direction is formed on the lower side by forming the shock absorber side mounting portion 28 protruding by the length M on the left side of the vehicle. In addition, a downward space 38 is formed below the intrusion prevention surface 36 between the tire house side mounting portion 26 and the upper portion of the left rear shock absorber 22.

  Although a detailed description is omitted here, a right rear shock absorber is attached to the inner wall of the right rear tire house 8R via an upper bracket for the right rear shock absorber, as in the case of the left side of the vehicle. A right rear lining is mounted on the inner surface of the rear tire house 10R.

  In addition, a fuel tank 40 is disposed between the rear axle 10 and the second center cross member 16-2 between the left side frame 4L and the right side frame 4R, and the vehicle is more than the rear cross member 18. A muffler 42 is disposed at the rear. A fuel filler tube 44 is connected to the fuel tank 40 on the right side of the vehicle.

The first center cross member 16-1 and the second center cross member 16-2 are canisters that adsorb evaporated fuel generated in the fuel tank 40 via a canister mounting bracket 46 under the floor 14 on the left side of the vehicle. 48 is attached. The canister 48, the evaporation pipe (tank side pipe) 50 connected to the fuel tank 40, a purge pipe (engine-side pipe) 52 connected to the engine, the atmosphere communication piping (canister sanction pipe) 54 to the air opening Is provided.

The atmosphere communication piping 54 extended and the vehicle rear side in the vehicle left, a air opening 54A of the atmosphere communication piping 54 to the tip section.

As shown in FIG. 1, between the left rear lining 24 which is mounted on the left rear tire house 8L to the inner surface of the left rear wheel house 8L, the cross section is slightly greater width W than the pipe diameter D of the atmosphere communication piping 54 A space 56 is formed.

  In this case, the lower end 24E of the left rear lining 24 forms a lower opening 58 and is disposed above the shock absorber side mounting portion 28 of the left rear shock absorber upper bracket 20, and the space 56 has a width W. Is set smaller than the length M of the shock absorber side mounting portion 28 protruding in the lateral direction on the left rear tire 6L side.

Then, as shown in FIGS. 1 to 3, this space 56, guides the atmosphere communication piping 54 of the atmosphere communicating piping 54, the air opening 54A of the distal end side of the atmosphere communication piping 54 downwardly Position. In this case, the atmosphere communication piping 54, and upwardly inclined rear side of the vehicle at the vehicle front side than the left rear shock absorber for the upper bracket 20, the uppermost portion directly above side of the left rear shock absorber for the upper bracket 20 The air opening 54A is bent at the top bend 54B, and the air opening 54A is inclined downward on the rear side of the vehicle with respect to the left rear shock absorber upper bracket 20. Therefore, the air opening 54A is a little of the left rear shock absorber upper bracket 20. It is arranged above and slightly behind the vehicle. Furthermore, the atmosphere communication piping 54 is clamped by the left rear tire house 8L by the vehicle first at the front side, the second fastener (nut) 60-1 - 60-2 than the left rear shock absorber for the upper bracket 20 .

  Next, the operation of the first embodiment will be described.

The fuel vapor produced in the fuel tank 40, once adsorbed in the canister 48, is disengaged from the canister 48 by the air introduced from the air opening 54A of the atmosphere communication piping 54 during operation of the engine (purge), and, in the engine To be supplied.

  Further, when the vehicle travels on a snowy road, as shown by an arrow F in FIG. 1, snow lifted by the left rear tire 6 </ b> L passes through the downward space 38 from the vehicle right side of the left rear shock absorber 22 on the lower side of the vehicle 2. After that, the snow is prevented from entering by the intrusion prevention surface 36 on the lower surface of the shock absorber side mounting portion 28, and is prevented from entering by the upper mounting portion 32 at the upper part of the left rear shock absorber 22. In addition, since the atmospheric opening 54A is disposed downward in the space 56, it is possible to prevent snow from entering the atmospheric opening 54A and prevent the atmospheric opening 54A from being blocked by snow. .

In other words, the atmosphere communication piping 54 leads to the opposite side of the vehicle left side of the left rear wheel house in 8L the fuel filler tube 44 on the right side of the vehicle, the air release opening 54A of the distal end side, in the opposite position from the fuel filler tube 44 That is, on the left side of the same vehicle where the canister 48 is disposed, it is positioned downward in a space 56 formed between the left rear tire house 8L and the left rear lining 24 attached to the inner surface of the left rear tire house 8L. Accordingly, it is possible to prevent water from entering the atmosphere opening 54A and blocking the atmosphere opening 54A due to snow.

  Further, when the vehicle travels on the flooded water, the water swept up by the left rear tire 6L is prevented from entering by the left rear shock absorber upper bracket 20 and above the left rear shock absorber upper bracket 20. It is possible to prevent water from entering the atmosphere opening 54A without reaching the high atmosphere opening 54A.

Conventionally, in the fuel filler tube, since the outer diameter of the fuel filler tube is large and the space between the left rear tire house and the left rear lining is too large, intrusion of snow and water has increased. in, as shown in FIG. 1, the atmosphere communication piping 54, the left rear tire house 8L, with so as to minimize the gap between the left rear lining 24, the shock absorber side of the left rear shock absorber for the upper bracket 20 By using the attachment portion 28, it is possible to make it difficult for water and snow to enter from the atmosphere opening 54A.

Furthermore, the atmosphere communication piping 54 having a air opening 54A, the first to the left rear tire house 8L, since the clamped second fastener 60-1, 60-2, to stabilize the position of the air opening 54A be able to.

That is, since the canister 48 is installed on the opposite side of the fuel filler tube 44 of the fuel tank 40, as in the prior art, than the case of installing the atmosphere communication piping 54 along a fuel filler tube 44, the number of parts The cost can be reduced and the weight can be reduced. In addition, as shown in FIG. 1, snow that has been lifted up by the left rear tire 6 </ b> L while traveling on a snowy road rises in the left rear tire house 8 </ b> L, and between the wall surface of the left rear tire house 8 </ b> L and the left rear lining 24. proceeds toward the lower side of the air opening 54A of the formed space 56, is obstructed by the left rear shock absorber upper bracket 20 disposed on the lower side of the air opening 54A, the atmosphere communication piping 54 Reaching to the atmosphere opening 54A is prevented, thereby preventing the atmosphere opening 54A from being blocked by snow.

Consequently, reference will be made only to the description of the left side of the vehicle, than the pipe diameter D of the left rear wheel house 8L cross section between the left rear lining 24 mounted on the inner surface of the left rear tire house 8L is the atmosphere communication piping 54 A space 56 having a large width W is formed, and the atmosphere communication pipe 54 is guided into the space 56 and the atmosphere opening 54A is opened downward. when riding flooded road, tube diameter of the can to prevent the penetration of water into the air opening 54A, also, the left rear lining 24 and the left rear tire house between 8L, cross section atmosphere communication piping 54 Since a space 56 having a width W slightly larger than D is formed and the atmosphere opening 54A is opened in the space 56, the snow swept by the left rear tire 6L when traveling on a snowy road It can be difficult to penetrate into the space 56.

  Further, a left rear shock absorber upper bracket 20 for attaching the left rear shock absorber 22 is attached to the inner wall of the left rear tire house 8L, and an air release port 54A of the air communication pipe 54 is provided above the left rear shock absorber upper bracket 20. Thus, the left rear shock absorber upper bracket 20 for attaching the left rear shock absorber 22 to the lower side of the air opening 54A is positioned. It is possible to prevent entry into the space 56 from below the vehicle 2.

  FIG. 6 shows a special configuration of the present invention and shows a second embodiment.

  In the following embodiments, portions having the same functions as those of the first embodiment will be described with the same reference numerals.

  The features of the second embodiment are as follows. That is, in the atmosphere communication pipe 54, the atmosphere opening 54A is directed to the rotation direction of the left rear tire 6L at the top bend 54B, and is disposed above the left rear shock absorber upper bracket 20.

  According to the configuration of the second embodiment, since the atmosphere opening 54A is oriented in the rotation direction of the left rear tire 6L, it is possible to effectively prevent water swept up by the left rear tire 6L from entering the atmosphere opening 54A. Can be prevented.

  FIG. 7 shows a special configuration of the present invention and shows a third embodiment.

  The features of the third embodiment are as follows. That is, in the atmosphere communication pipe 54, the portion of the atmosphere opening 54A is disposed in the left side frame 4L.

  According to the configuration of the third embodiment, since the atmosphere opening 54A is arranged in the left side frame 4L, the length of the atmosphere communication pipe 54 can be shortened and the position of the atmosphere opening 54A is stabilized. be able to.

With a higher position of the air opening of the atmosphere communication piping, between the lining and the rear tire house, so cross-section to form a space width greater than the pipe diameter of the atmosphere communication piping, air in this space The configuration in which the opening is located can also be applied to various vehicles.

It is sectional drawing of the vehicle rear part by the arrow II line | wire of FIG. 2 in 1st Example. It is a left view of the vehicle rear part in 1st Example. It is a perspective view of the rear part of vehicles in the 1st example. It is a partial left view of a vehicle in the first embodiment. 1 is a partial plan view of a vehicle in a first embodiment. It is a left view of the vehicle rear part in 2nd Example. It is a left view of the vehicle rear part in 3rd Example. It is a perspective view of the vehicle rear part in the past. It is a perspective view of the other vehicle rear part conventionally.

Explanation of symbols

2 Vehicle 6 Rear tire 8 Rear tire house 14 Floor 16 Center cross member 18 Rear cross member 20 Upper bracket for left rear shock absorber 22 Left rear shock absorber 24 Left rear lining 36 Intrusion prevention surface 38 Downward space 40 Fuel tank 44 Fuel filler tube 48 Canister 54 Atmospheric communication piping 56 Space 58 Lower opening 60 Fixing tool

Claims (1)

In a canister piping structure in which a canister for adsorbing evaporated fuel generated in a fuel tank is disposed under the floor of the vehicle, and the canister is connected to an atmospheric communication pipe having an air opening, the rear tire of the vehicle between the lining to be attached to the house and the inner surface of the rear tire house in cross-section to form the space of greater width than the pipe diameter of the atmosphere communication piping, a shock absorber on the inner wall surface of the rear tire in the house mounting brackets for mounting, the atmosphere communicating pipe, the pipe structure of the canister, characterized in that so as to open downward the air opening and guides in the space at the upper of the bracket.

Images