JP2006316692A - Piping structure for canister - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent water intrusion to an atmospheric air opening when a vehicle travels on a road covered by water by putting the atmospheric air opening at a high position and make snow swirled up by a tire at a time of snowy road travel not easily intrude in a space and preventing the atmospheric air opening from being blocked by snow by forming the space of which section is wider than pipe diameter of an atmospheric air communication pipe between a lining and a rear tire house and positioning the atmospheric air opening in the space. <P>SOLUTION: The space of which section is wider than pipe diameter of the atmospheric air communication pipe is formed between the rear tire house of the vehicle and the lining installed on an inner surface of the rear tire house, and the atmospheric air communication pipe is provided to be led to the space and make the atmospheric air opening open downward. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 are provided with a switching valve mechanism for switching between the first passage and the second passage.
In addition, in the canister arrangement structure, there is a rear wheel house inner in which a recess toward the vehicle compartment is bulged 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 rear tire house of the vehicle and a lining attached to the inner surface of the rear tire house, a space having a cross section having a width larger than the diameter of the atmosphere communication pipe is formed, and the atmosphere communication pipe is connected to the interior of the space. And the atmosphere opening is disposed so as to open downward.

  In the canister piping structure according to the present invention, a space having a width larger than the diameter of the air communication pipe is formed between the rear tire house of the vehicle and the lining attached to the inner surface of the rear tire house. By arranging the piping so that the air opening is open downward, the position of the air opening is raised, and when the vehicle travels on the flooded water, Intrusion can be prevented, and a space whose cross section is wider than the diameter of the air communication pipe is formed between the lining and the rear tire house, and an air opening is located in this space, 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.

The present invention prevents the intrusion of water and snow into the atmosphere opening of the atmosphere communication pipe, raises the position of the atmosphere opening, and has a cross section between the lining and the rear tire house. A space having a width larger than the diameter is formed, and the atmosphere opening is positioned downward in this 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 vehicle 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 that is mounted on the inner wall surface of the left rear tire house 8L, and the shock absorber main body of the left rear shock absorber 22 on the left end surface of the shock absorber side mounting portion 28 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 between the tire house side mounting portion 26 and the upper portion of the left rear shock absorber 22 below the intrusion prevention surface 36.

  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 includes an evaporation pipe (tank side pipe) 50 connected to the fuel tank 40, a purge pipe (engine side pipe) 52 connected to the engine, and an air communication pipe (canister suction pipe) 54 opened to the atmosphere. Is provided.

  The atmospheric communication pipe 54 extends to the left side of the vehicle and to the rear side of the vehicle, and has an atmospheric opening 54A of the atmospheric communication pipe 54 at the tip portion.

  As shown in FIG. 1, the space between the left rear tire house 8L and the left rear lining 24 mounted on the inner surface of the left rear tire house 8L has a width W that is slightly larger than the tube diameter D of the atmospheric communication pipe 54. 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.

  As shown in FIGS. 1 to 3, the atmosphere communication pipe 54 of the atmosphere communication pipe 54 is guided into the space 56, and the atmosphere opening 54 </ b> A on the tip side of the atmosphere communication pipe 54 is positioned downward. In this case, the atmosphere communication pipe 54 is inclined to the vehicle front side and the vehicle rear side upper side of the left rear shock absorber upper bracket 20, and the uppermost part directly above the left rear shock absorber upper bracket 20 is a top portion. The air release port 54A is bent downward at the vehicle rear side with respect to the left rear shock absorber upper bracket 20 so that the air release port 54A is slightly above the left rear shock absorber upper bracket 20. And a little on the vehicle rear side. Further, the atmosphere communication pipe 54 is fastened by the left rear tire house 8L by first and second fixtures (nuts) 60-1 and 60-2 on the vehicle front side of the left rear shock absorber upper bracket 20.

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

  The evaporated fuel generated in the fuel tank 40 is once adsorbed by the canister 48, and is separated (purged) from the canister 48 by air introduced from the atmosphere opening 54A of the atmosphere communication pipe 54 when the engine is operated. 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. .

  That is, the atmosphere communication pipe 54 is guided into the left rear tire house 8L on the left side of the vehicle opposite to the fuel filler tube 44 on the right side of the vehicle, and the atmosphere opening 54A on the front end side is positioned opposite to the fuel filler tube 44. That is, on the left side of the same vehicle where the canister 48 is disposed, the vehicle 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. Intrusion of water from the atmosphere opening 54A and blocking of the atmosphere opening 54A due to snow can be prevented.

  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. As shown in FIG. 1, the gap between the atmosphere communication pipe 54, the left rear tire house 8L, and the left rear lining 24 is minimized, and the left rear shock absorber upper bracket 20 is mounted on the shock absorber side. Using the portion 28, it is possible to make it difficult for water and snow to enter from the air opening 54A.

  Furthermore, since the atmosphere communication pipe 54 provided with the atmosphere opening 54A is fastened to the left rear tire house 8L by the first and second fixtures 60-1 and 60-2, the position of the atmosphere opening 54A is stabilized. Can do.

  That is, since the canister 48 is installed on the opposite side of the fuel filler tube 44 of the fuel tank 40, the number of parts can be reduced as compared with the conventional case where the air communication pipe 54 is installed along the fuel filler tube 44. 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. The air travels toward the air release port 54A below the formed space 56, but is obstructed by the upper bracket 20 for the left rear shock absorber disposed below the air release port 54A. It is possible to prevent the air opening 54A from reaching the opening 54A, thereby preventing the air opening 54A from being blocked by snow.

  As a result, although only the description on the left side of the vehicle will be referred to, the cross section between the left rear tire house 8L and the left rear lining 24 mounted on the inner surface of the left rear tire house 8L is larger than the diameter D of the air communication pipe 54. A space 56 having a width W is formed, and the atmosphere communication pipe 54 is guided into the space 56 and the atmosphere opening 54A is opened downward, so that the position of the atmosphere opening 54A is increased, and the vehicle is crowned. When traveling on a water channel, water can be prevented from entering the atmosphere opening 54A, and the cross section between the left rear lining 24 and the left rear tire house 8L is larger than the diameter D of the air communication pipe 54. Since the space 56 having a slightly larger width W is formed and the air opening 54A is opened in the space 56, the snow swept up by the left rear tire 6L when traveling on a snowy road is emptied. It can be difficult to penetrate into the 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.

  The position of the atmosphere opening of the atmosphere communication pipe is increased, and a space whose cross section is wider than the diameter of the atmosphere communication pipe is formed between the lining and the rear tire house, and the atmosphere opening opening is formed in this space. The configuration for positioning the 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 (2)

  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 house and the lining attached to the inner surface of the rear tire house, a space whose cross section is wider than the diameter of the atmospheric communication pipe is formed, and the atmospheric communication pipe is guided into the space and A canister piping structure, wherein the air opening is arranged to open downward.   The canister pipe according to claim 1, wherein a bracket for attaching a shock absorber is attached to an inner wall surface in the rear tire house, and the atmosphere opening of the atmosphere communication pipe is located above the bracket. Construction.

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