JP4930710B2 - Arrangement structure of vehicle canister filter - Google Patents

Description

  The present invention relates to an arrangement structure of a canister filter for purifying outside air introduced into a canister provided in a vehicle.

  The vehicle is provided with a canister that adsorbs and recovers the evaporated fuel generated in the fuel tank by an adsorbent such as activated carbon. The evaporated fuel recovered in the canister is purged to the intake system during engine operation. It is used for combustion.

  By the way, although the canister is often arranged in the engine room, it is difficult to arrange a large capacity canister in the engine room. For example, as shown in the partial rear view of the vehicle in FIG. Arranged horizontally inside the left side frame 104L below the rear floor 109 (see, for example, Patent Documents 1 and 2).

  As shown in FIG. 6, an air suction pipe 133 for introducing outside air is connected to the canister 124, and a canister filter 131 for purifying outside air is connected to the end of the air suction pipe 133. However, the canister filter 131 is disposed outside the left side frame 104L for the sake of space.

Further, in the space between the left side frame 104L and the canister 124, a brake pipe 130 and a fuel pipe 128 extend in the vehicle front-rear direction (vertical direction in FIG. 6), and these are the inner walls of the left side frame 104L. The clamp bracket 140 is attached to the left side frame 104L and is disposed along the longitudinal direction of the left side frame 104L.
JP 2006-315521 A JP-A-8-058404

  However, when the canister filter 131 is disposed outside the left side frame 104L as shown in FIG. 6, the canister filter 131 is exposed to the outside of the vehicle and the appearance of the vehicle is deteriorated, and the canister 124 and the canister filter are disposed. Since the air suction pipe 133 connecting with 131 passes under the left side frame 104L, there is a problem that the air suction pipe 133 is easily damaged.

Therefore, the canister filter 131 when disposed inside the left side frame 104L, the canister 124 in order to avoid interference with the brake pipe 130 and fuel pipe 128 extending along the left side frame 104L in the width direction center side of the vehicle It is necessary to send. When the canister 124 is brought closer to the center in the width direction of the vehicle in this way, the canister 124 approaches an exhaust pipe (not shown) extending in the front-rear direction at the center in the width direction, and the canister 124 is heated by the heat of the exhaust pipe to evaporate fuel. The problem arises that the amount of adsorbed is reduced.

  The present invention has been made in view of the above problems, and the object of the present invention is to improve the appearance of the vehicle and prevent damage to the air suction piping without reducing the amount of evaporated fuel adsorbed by the canister. Another object of the present invention is to provide an arrangement structure for a canister filter for a vehicle.

In order to achieve the above object, the present invention provides an engine and a transmission that are mounted between a pair of left and right side frames with an output shaft oriented in the vehicle longitudinal direction, and an exhaust pipe extending from the engine to the vehicle longitudinal rear is provided in the vehicle width direction. The canister is disposed at the center, and the canister is disposed at a position sandwiched between the side frame and the exhaust pipe below the vehicle body floor, and a canister filter is disposed on an end surface of the canister on the side frame side via an air suction pipe. In a vehicle canister filter arrangement structure, wherein a vehicle pipe extending in the vehicle front-rear direction is arranged along an inner wall facing the canister of the side frame.
The upper end of the canister filter is set at substantially the same height as the upper end of the canister, and the upper portions of the canister filter and the canister are connected by the air suction pipe extending in a substantially horizontal direction, and connected to the vehicle pipe. And forming a curved portion protruding from the inner side wall of the side frame toward the canister side and passing above the air suction pipe, and the canister filter in a space between the curved portion and the inner side wall of the side frame. Is provided.

According to the present invention, since the curved portion that protrudes from the inner wall of the side frame to the canister side and passes above the air suction piping is formed in the vehicle piping, the vehicle piping is placed in the same space as the air suction piping. It is possible to create a space in which a canister filter can be disposed between the vehicle piping and the inner side wall of the side frame. In addition, since it is not necessary to move the canister to the exhaust pipe side when creating this space, the canister is not heated by the heat of the exhaust pipe, preventing a decrease in the amount of adsorbed fuel vapor in the canister. High evaporative fuel adsorption performance can be secured in the canister.

  In addition, since the canister filter is disposed in the space between the curved portion of the vehicle pipe and the inner wall of the side frame, the canister filter and the air suction pipe may protrude to the outside of the side frame and be exposed outside the vehicle. The appearance of the vehicle is improved. And since air suction piping does not pass under a side frame, damage to this air suction piping is prevented.

In addition, air suction pipes larger in diameter than vehicle pipes such as brake pipes and fuel pipes are arranged at higher positions in the vertical direction, so that it is easy to introduce traveling wind passing under the vehicle between the canister and the canister filter. The canister can be cooled by the traveling wind to increase the amount of evaporated fuel adsorbed by the canister.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a plan view of a vehicle provided with a canister filter arrangement structure according to the present invention, FIG. 2 is an enlarged plan view of the periphery of the canister of the vehicle, FIG. 3 is a left side view of the periphery of the canister of the vehicle, FIG. Is a rear view around the canister of the vehicle, and FIG. 5 is a perspective view around the canister of the vehicle.

  In the vehicle 1 shown in FIG. 1, the engine 2 and the transmission 3 are mounted between the pair of left and right side frames 4L and 4R with the output shaft directed in the vehicle front-rear direction, and in front of the pair of left and right rear wheels 5 at the rear of the vehicle. A fuel tank 6 is provided. In addition, between the pair of left and right side frames 4L and 4R, a first cross member 7 and a second cross member 8 are laid in parallel to each other in the longitudinal direction of the vehicle. In FIG. 1, 9 is a vehicle body floor, and 10 is a concave tunnel formed at the center lower portion in the vehicle width direction.

  A propeller shaft 11 extends from the transmission 3 in the center in the vehicle width direction toward the rear of the vehicle. The propeller shaft 11 is connected to the rear axle 12 via a differential device (not shown).

  The engine 2 is a V-type engine, and the V-type engine 2 is vertically placed in the engine room so that the cylinder row direction of each of the left and right banks extends in the vehicle front-rear direction. Exhaust manifolds 13L and 13R are respectively attached to. The catalytic converters 14L and 14R are connected to the gathering portions of the left and right exhaust manifolds 13L and 13R, respectively, and the exhaust pipes 15L and 15R extending from the left and right catalytic converters 14L and 14R are gathered at the gathering portion 16. A single exhaust pipe 17 extends from the collecting portion 16 to the rear of the vehicle, and a catalytic converter 18 is connected to the rear end of the exhaust pipe 17.

  A sub-muffler 20 disposed at the center in the vehicle width direction is connected to an exhaust pipe 19 extending from the catalytic converter 18 to the rear of the vehicle. An exhaust pipe 21 extending from the sub-muffler 20 toward the rear of the vehicle is connected to the rear end of the vehicle. It is connected to the central portion in the width direction of the main muffler 22 placed horizontally between the left and right side frames 4L, 4R. An exhaust pipe 23 extends outward from the right end of the main muffler 23. The exhaust pipe 23 is bent at a substantially right angle toward the rear of the vehicle, and its rear end is open to the atmosphere. Yes.

  Further, as shown in FIG. 1, a canister 24 is disposed in a horizontal state in a space in front of the fuel tank 6 and sandwiched between the left side frame 4 </ b> L below the vehicle body floor 9 and the sub muffler 20. ing. The canister 24 adsorbs and collects the evaporated fuel generated in the fuel tank 6 with activated carbon or the like, and supplies the evaporated fuel adsorbed on the activated carbon or the like to the intake system of the engine 2 when the engine 2 is started. 2 to 5, the left side frame 4L and the first and second cross members 7 and 8 are supported by a canister bracket 26 attached by bolts 25 (see FIG. 5). Has been.

  Incidentally, as shown in FIG. 1, the fuel pipe 28 connected to the discharge side of the fuel pump 27 provided in the fuel tank 6 extends to the left side of the vehicle, and then faces the inner wall of the left side frame 4L toward the front of the vehicle. Extends to the engine 2. A brake pipe 30 connected to a brake device (not shown) provided on the front wheel 29 and the rear wheel 5 also extends in the vehicle front-rear direction along the inner wall of the left side frame 4L.

  2 to 5, a canister filter 31 is disposed along the inner wall of the left side frame 4L on the side of the canister 24. The canister filter 31 is a bolt 32 (see FIG. 5). ) To the canister bracket 26.

  Here, as shown in FIG. 5, the upper end of the canister filter 31 is set at substantially the same height as the upper end of the canister 24, and the upper portions of the canister filter 31 and the canister 24 are arranged in a substantially horizontal direction. They are connected by an extended air suction pipe 33. Further, as shown in FIG. 5, a suction pipe 34 that is open to the atmosphere is connected to the rear end lower portion of the canister filter 31. An air cut valve 35 is provided in the middle of the air suction pipe 33.

  On the other hand, as shown in FIGS. 2 to 5, an evaporation port 36 and a purge port 37 are provided on the left end surface of the canister 24 facing the canister filter 31. An extending evaporation pipe 38 is connected, and a purge pipe 39 is connected to the purge port 37. The purge pipe 39 extends to the engine 2 along the inner wall of the left side frame 4L toward the front of the vehicle body and is connected to the intake system of the engine 2.

  Thus, in the present embodiment, as shown in FIGS. 2 to 4, the fuel pipe 28 and the brake pipe 30 protrude from the inner wall of the left side frame 4 </ b> L to the canister 24 side and the air suction pipe 33. Curved portions 28a and 30a passing above are formed. As shown in FIG. 2, a canister filter 31 is disposed in a space between the curved portions 28a and 30a and the inner side wall of the left side frame 4L. Has been.

  Thus, the evaporated fuel generated in the fuel tank 6 is introduced into the canister 24 through the evaporation pipe 38, and is adsorbed and recovered by the activated carbon or the like in the canister 24. When the engine 2 is started, air in the atmosphere is drawn into the canister filter 31 from the air suction pipe 34 by being drawn by the intake negative pressure, and the air is purified by the canister filter 31 and then the air suction pipe. 33 is introduced into the canister 24 and supplied to the intake system of the engine 2 through the purge pipe 39 together with the evaporated fuel adsorbed by the activated carbon or the like in the canister 24. These air and evaporated fuel are supplied to an injector (not shown). Is used for combustion in the engine 2 together with the air-fuel mixture formed by the above.

  The high-temperature exhaust gas generated by the combustion of the air-fuel mixture in the engine 2 flows from the left and right exhaust manifolds 13L and 13R to the catalytic converters 14L and 14R and is purified, and then flows through the left and right exhaust pipes 15L and 15R. The exhaust gas that has reached the collecting portion 16 and merged at the collecting portion 16 flows from the exhaust pipe 17 to the catalytic converter 18 and is purified again. The exhaust gas purified by the catalytic converter 18 is silenced while passing through the sub-muffler 20, and the silenced exhaust gas is introduced from the exhaust pipe 21 to the main muffler 22 and is silenced again, and then the exhaust pipe 23 is discharged into the atmosphere.

  As described above, in the present embodiment, the fuel pipe 28 and the brake pipe 30 are formed with the curved portions 28a and 30a that protrude from the inner wall of the left side frame 4L toward the canister 24 and pass above the air suction pipe 33. The fuel pipe 28 and the brake pipe 30 can be arranged vertically in the same space as the air suction pipe 33, and the fuel pipe 28 and the brake pipe 30 are disposed between the inner side walls of the left side frame 4L. A space in which the canister filter 31 can be disposed can be created. Since it is not necessary to move the canister 24 to the sub muffler 20 side when creating this space, the canister 24 is not heated by the heat of the sub muffler 20, and the amount of adsorption of evaporated fuel in the canister 24 is reduced. It is possible to ensure high performance for the canister 24.

  Further, since the canister filter 31 is disposed in the space between the curved portions 28a, 30a of the fuel pipe 28 and the brake pipe 30 and the inner wall of the left side frame 4L, the canister filter 31 and the air suction pipe 33 are connected to the left. The external appearance of the vehicle is enhanced without protruding outside the side frame 4L and being exposed outside the vehicle. And since the air suction piping 33 does not pass under the left side frame 4L, damage to the air suction piping 33 is prevented.

  Further, in the present embodiment, since the air suction pipe 33 having a diameter larger than that of the fuel pipe 28 and the brake pipe 30 is disposed at a higher position in the vertical direction, the traveling wind passing under the vehicle canister 24 and the canister filter The canister 24 is cooled by the traveling wind, and the amount of fuel vapor adsorbed on the canister 24 can be increased.

  Although the present invention has been described with respect to a mode in which the present invention is applied particularly to a vehicle equipped with a V-type engine, the present invention can be similarly applied to a vehicle equipped with any type of engine. Of course.

It is a top view of the vehicle provided with the arrangement | positioning structure of the filter for canisters which concerns on this invention. 1 is an enlarged plan view of a periphery of a canister of a vehicle provided with a canister filter arrangement structure according to the present invention. 1 is a left side view of a periphery of a canister of a vehicle provided with a canister filter arrangement structure according to the present invention. 1 is a rear view of the vicinity of a canister of a vehicle provided with a canister filter arrangement structure according to the present invention. 1 is a perspective view of the vicinity of a canister of a vehicle provided with a canister filter arrangement structure according to the present invention. FIG. 6 is a rear view of the periphery of a canister of a vehicle showing a conventional canister filter arrangement structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine 3 Transmission 4L, 4R Side frame 5 Rear wheel 6 Fuel tank 7 First cross member 8 Second cross member 9 Vehicle body floor 10 Tunnel 11 Propeller shaft 12 Rear axle 13L, 13R Exhaust manifold 14L, 14R Catalytic converter 15L , 15R Exhaust pipe 16 Collecting portion 17 Exhaust pipe 18 Catalytic converter 19 Exhaust pipe 20 Sub muffler 21 Exhaust pipe 22 Main muffler 23 Exhaust pipe 24 Canister 25 Bolt 26 Canister bracket 27 Fuel pump 28 Fuel piping (vehicle piping)
28a Curved portion of fuel piping 29 Front wheel 30 Brake piping (vehicle piping)
30a Curved portion of brake piping 31 Canister filter 32 Bolt 33, 34 Air suction piping 35 Air cut valve 36 Evaporation port 37 Purge port 38 Evaporation piping 39 Purge piping

Claims (1)

The engine and transmission are mounted between a pair of left and right side frames with the output shaft facing in the longitudinal direction of the vehicle, an exhaust pipe extending from the engine to the rear in the longitudinal direction of the vehicle is arranged at the center in the width direction of the vehicle, and the canister is located below the vehicle floor. The canister is disposed at a position sandwiched between the side frame and the exhaust pipe, and a canister filter is connected to an end surface of the canister on the side frame side through an air suction pipe, so as to face the canister of the side frame. In the vehicle canister filter arrangement structure, in which vehicle piping extending in the vehicle longitudinal direction along the inner side wall is arranged,
The upper end of the canister filter is set at substantially the same height as the upper end of the canister, and the upper portions of the canister filter and the canister are connected by the air suction pipe extending in a substantially horizontal direction, and connected to the vehicle pipe. And forming a curved portion protruding from the inner side wall of the side frame toward the canister side and passing above the air suction pipe, and the canister filter in a space between the curved portion and the inner side wall of the side frame. An arrangement structure of a canister filter for a vehicle, characterized in that

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