JP3343572B2 - Atmospheric piping system of vehicle canister - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air piping system for a canister of a vehicle, and more particularly, to a structure in which an air suction pipe member is shortened, and an air suction filter is detachable as a single unit. The present invention relates to an atmosphere-side piping device for a canister of a vehicle that can suppress suction of dust.

[0002]

2. Description of the Related Art In a vehicle, left and right side members are provided in a front-rear direction, and front and rear cross members connected to the left and right side members are provided in a left-right direction. Some vehicles have a fuel tank and an evaporation system having a canister.

In this evaporative system, a canister is provided between an evaporative pipe having an evaporative passage communicating with a fuel tank and a purge pipe having a purge passage communicating with an intake system of an engine. A purge valve is provided on the way to control the amount of fuel evaporated to the intake system by opening and closing the purge passage according to the operating state of the engine. The canister contains an adsorbent such as activated carbon. When the engine is stopped, the evaporative fuel in the fuel tank is adsorbed by the adsorbent, and when the engine is operating, the adsorbed evaporative fuel is released (purged) by introducing air. ) And supply it to the engine. The atmosphere to the canister is introduced from an air suction pipe member such as a hose connected to the atmosphere open side.

[0004] Such an evaporation system is disclosed, for example, in Japanese Patent Application Laid-Open No. 9-14060. The one disclosed in this publication is provided with an air hose that is an air suction pipe member that communicates one end to the bottom of the canister and inclines the other end downward to reach the side surface of the vehicle body frame. This is to prevent water from staying in the water.

[0005]

However, in the conventional evaporation system, when the fuel is supplied to the fuel tank, the air in the canister pushed by the fuel vapor from the fuel tank is rapidly released to the atmosphere. In order to flow to the side, it is desirable that the distance from the canister to the inlet / outlet at the end of the air suction pipe member on the open side of the air be smaller because the flow resistance between the air suction pipe member and the atmosphere is small. However, there was a disadvantage that the air suction pipe member had a long overall length and therefore had a high flow resistance.

Further, when the canister releases (purges) a large amount of evaporative fuel and supplies it to the engine, a large amount of air is introduced into the canister from the air suction pipe member. (Dust) was also introduced into the canister.

Further, when the entrance / exit of the air suction pipe member on the atmosphere open side is mounted near the fuel tank, the entrance / exit is arranged closer to the ground than the engine room or the like and behind the vehicle. Therefore, there is a disadvantage that the amount of dust introduced into the canister increases.

[0008]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, the present invention provides a side member oriented in the front-rear direction of the vehicle, and a side member oriented in the left-right direction of the vehicle. The vehicle is provided with a fuel tank and a canister that adsorbs the vaporized fuel generated in the fuel tank and introduces the atmosphere to release the adsorbed vaporized fuel and supply the vaporized fuel to the engine. In an atmosphere-side piping device for a canister of a vehicle provided with an air suction pipe member connected to an atmosphere-opening side of the canister, the fuel tank and the canister are provided at a rear side of the vehicle, and a fuel tank and a canister are provided rearward of the fuel tank. The vehicle is provided with an air suction filter for removing atmospheric dust introduced into the air suction pipe member. Characterized in that attached the air suction filter to the side members.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides an air suction filter which is provided with a fuel tank and a canister on the rear side of a vehicle and removes atmospheric dust introduced into an air suction pipe member for a vehicle behind the fuel tank. Along with
Since this air suction filter is attached to the side member, the air suction pipe member is shortened, the flow resistance between the air suction pipe member and the atmosphere from inside the canister is reduced when fuel is supplied to the fuel tank. It can be detached as a single item, and furthermore, suction of dust into the canister can be suppressed.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 4 show an embodiment of the present invention. In FIG. 1, reference numeral 2 denotes a vehicle, 4 denotes an engine mounted on the front side of the vehicle 2, 6.6 denotes front wheels,
8.8 is a rear wheel.

The vehicle 2 is provided with left and right side members 10 oriented in the front-rear direction, and with front and rear cross members 12 connected to the left and right side members 10 oriented in the left-right direction. ing. As shown in FIG. 4, the side member 10 and the cross member 12 are formed in a U-shaped cross section that opens upward.

The vehicle 2 is provided with a fuel tank 14 on the rear side.

The engine 4 is connected to one end of an exhaust pipe 16 constituting an exhaust system path. This exhaust pipe 16
The engine 2 is directed in the front-rear direction at a substantially central portion in the left-right direction of the vehicle 2, and the other end is bent rightward below the fuel tank 14 and along the front side surface of the fuel tank 14,
Further, it extends rearward of the vehicle 2 along the right side surface of the fuel tank 14, and the other end is located at the rear end of the vehicle 2.

The exhaust pipe 16 has a catalytic converter 18 and a sub-chamber 19 in front of the vehicle 2 with respect to the fuel tank 14.
The muffler 20 is provided behind the vehicle 2 with respect to the fuel tank 14.

A canister 22 is integrally attached to the upper right corner and the front corner of the fuel tank 14. The canister 22 contains an adsorbent, adsorbs the evaporated fuel generated in the fuel tank 14 when the engine 4 is stopped, and releases (purges) the adsorbed evaporated fuel by introducing the atmosphere when the engine 4 is operating. )
And supplies it to the engine 4.

An air suction pipe member 24 is connected to the canister 22 on the air release side so as to introduce air.

The air suction pipe member 24 includes a first air suction hose 26 made of an elastic material, an air suction pipe 28 made of a metal material, a second air suction hose 30 made of an elastic material, and a third air suction made of an elastic material. And a hose 32. One end of the first air suction hose 26 is connected to a hose connection portion 34 on the left side of the canister 22, and then goes around the left side, front side, and right side of the canister 22, and the other end is behind the vehicle 2. It is provided facing. The other end of the first air suction hose 26 is fixed by a hose fixing body 36. The air suction pipe 28 has one end connected to the other end of the first air suction hose 26, and the upper end of the fuel tank 14, along the rear side of the fuel tank 14, and the other end on the left side of the fuel tank 14. And it is located at the rear corner. The air suction pipe 28 is fixed to a rear upper portion of the fuel tank 14 by a plurality of pipe fixing bodies (not shown). Second air suction hose 30
Has one end connected to the other end of the air suction pipe 28, and extends rearward of the vehicle 2 from the fuel tank 14 along the left side member 10 distant from the exhaust pipe 16, and has the other end connected to the air. It is connected to a suction filter 38. One end of the third air suction hose 32 is connected to the air suction filter 38, and extends along the left side member 10, that is, overlaps with the third air suction hose 32 and extends forward of the vehicle 2. The connector 40 serving as an entrance on the other end side to the atmosphere opening side is the side member 10.
It is attached to the cross member 12 on the side. Therefore,
Atmosphere is taken into the connector 40 from inside the cross member 12 and is introduced into the air suction pipe member 24.

The air suction filter 38 is mounted by filter mounting bolts 42 from below the side member 10 inside the left side member 10 away from the exhaust system such as the exhaust pipe 16 and the muffler 20 which are heat sources. And removes dust contained in the air from the connector 40. In addition, the second and third air suction hoses 30 and 32 are also provided along the left side member 10 apart from the exhaust passage.

Next, the operation of this embodiment will be described.

The canister 22 adsorbs the evaporated fuel generated in the fuel tank 14 when the engine 4 is stopped, and releases (purges) the adsorbed evaporated fuel to the engine 4 when the engine 4 is operating.

In this embodiment, since the air suction filter 38 and the second and third air suction hoses 30 and 32 are arranged away from the exhaust system which serves as a heat source for the muffler 20, the air suction filter 38 is provided. And the second and third air suction hoses 30, 32 can be prevented from heat damage, and their functions can be maintained well.

Further, the air suction filter 38 is connected to the left side member 10 by filter mounting bolts 42, 42.
The air suction filter 38
There are no other parts that interfere around the
The air suction filter 38 can be attached and detached as a single item,
The attachment / detachment work can be simplified.

Furthermore, since the air suction filter 38 is assembled inside the left side member 10, there is no stepping stone or the like, and damage to the air suction filter 38 can be avoided.

Further, since the air suction filter 38 is disposed on the vehicle 2 behind the fuel tank 14, the total length of the air suction pipe member 24 can be shortened. Even if the air in the canister 22 rapidly flows into the air suction pipe member 24, the flow resistance between the air suction pipe member 24 and the air can be reduced.

Further, by attaching the connector 40 of the third air suction hose 32 to the cross member 12,
Since it is not necessary to attach the connector 40 to the side member 10 which is directed in the traveling direction of the vehicle 2 and has a large amount of dust, the suction of the dust into the canister 22 can be performed when the canister 22 sucks the atmosphere for releasing the evaporated fuel adsorbed. Can be suppressed.

Furthermore, the third air suction hose 32
Is attached to the cross member 12 closer to the side member 10, so that suction of dust into the canister 22 can be suppressed. This is because the attachment portion of the connector 40 of the third air suction hose 32 is located at a high position of the cross member 12, so that it is difficult to suck the accumulated dust, and
Since the inside of the cross member 12 is a part with a volume,
This is because the flow rate of the air becomes slow, it becomes difficult to wind up dust, and the side member 10 is located immediately beside, so that the flow rate of the air becomes slow.

The air suction filter 38 also has a function of preventing the evaporated fuel from being released to the outside when the evaporated fuel is contained in the atmosphere from the canister 22.

[0028]

As apparent from the above detailed description, according to the present invention, the fuel tank and the canister are provided on the rear side of the vehicle, and the rear of the vehicle from the fuel tank is introduced into the air suction pipe member. In addition to providing an air suction filter that removes dust, and attaching this air suction filter to the side member, the air suction pipe member is shortened, and when refueling the fuel tank, the air suction pipe member and the air from inside the canister are removed. , The air suction filter can be made detachable as a single item, and the suction of dust into the canister can be suppressed.

[Brief description of the drawings]

FIG. 1 is a plan view of a vehicle.

FIG. 2 is an enlarged plan view of a main part near an air suction pipe member of FIG. 1;

FIG. 3 is a side view of the vicinity of the air suction pipe member of FIG. 2;

FIG. 4 is a perspective view of the vicinity of an air suction pipe member of FIG. 2;

[Explanation of symbols]

 2 Vehicle 4 Engine 10 Side member 12 Cross member 14 Fuel tank 16 Exhaust pipe 22 Canister 24 Air suction pipe member 38 Air suction filter 40 Connector

Claims (2)

(57) [Claims] 1. A side member is provided in the front-rear direction of a vehicle, and a cross member connected to the side member is provided in a left-right direction of the vehicle. The vehicle has a fuel tank and a fuel tank. A canister for adsorbing the evaporated fuel and introducing the atmosphere to release the adsorbed fuel and supply it to the engine,
In an atmosphere-side piping device for a canister of a vehicle provided with an air suction pipe member connected to an atmosphere-opening side of the canister, the fuel tank and the canister are provided at a rear side of the vehicle, and a fuel tank and a canister are provided rearward of the fuel tank. wherein the vehicle is provided with an air suction filter for removing dust in the air introduced into the air intake tube member Rutotomoni,
Install this air suction filter on the side member
Atmosphere-side piping device for a canister of a vehicle, characterized in that it is attached . 2. The air piping device for a canister of a vehicle according to claim 1, wherein the air suction pipe member and the air suction filter are provided separately from an exhaust system of the vehicle.