JP2001003819A - Canister attaching structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent retention of an evaporative fuel in an engine room by arranging a canister on a car body member for partitioning the engine room, and arranging a tip side of an atmosphere opening pipe member outside the car body member, in the case where the canister provided with the atmosphere opening pipe member is arranged in the engine room. SOLUTION: In an intake device of an engine, intake in an engine room 4 is taken in an intake taking-in port part 32A of an air cleaner 32. An evaporative fuel suppressing device is disposed in the engine room 4, an evaporative fuel from a fuel tank is supplied from an evaporative pipe to a canister 48, and is absorbed. At the time of engine operation, an adsorbed fuel is separated by the atmosphere led from an opening part 54A of an atmosphere opening pipe member 54 to the canister 48, and is supplied to an engine. In this case, an opening part 54A of the atmosphere opening pipe member 54 is opened downward a floor cover 22-1 for partitioning the engine room. It is thus possible to prevent retention of the evaporative fuel in the engine room so as to suppress fluctuation of an air-fuel ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a canister mounting structure, and more particularly, to a canister mounting structure in which a canister provided with an atmosphere opening pipe member is disposed in an engine room of a vehicle.

[0002]

2. Description of the Related Art In a vehicle, evaporated fuel leaking into the atmosphere from a fuel tank or the like contains a large amount of hydrocarbons (HC) and is one of the causes of air pollution, and is also associated with fuel loss. For this reason, various techniques for preventing this are known. As a typical example, the evaporated fuel in the fuel tank is adsorbed by an adsorbent such as activated carbon stored in the canister, and the evaporated fuel is separated (purged) during operation of the engine. There is an evaporative fuel control device (evaporation system) that supplies purge air to the engine.

That is, as shown in FIG. 7, in a vehicle 102, an engine 10 installed in an engine room 104 is provided.
6 is provided with an intake device 108 and an evaporative fuel control device 110. An air intake device 108 is provided on a frame floor cover 114 serving as another vehicle body member in a seat side wall 112A of a floor panel 112 serving as one vehicle body member and provided with an air intake 116A.
And an intake pipe 120 connected to the air cleaner 116 and attached to the throttle body 118, and a resonator 1 connected to a bottom portion of the air cleaner 116 via a communication pipe 122 penetrating the frame floor cover 114.
24. The evaporative fuel control device 110 is provided near the frame floor cover 114 near the air cleaner 116.
It has a canister 126 provided above. The canister 126 has an evaporating pipe 128 connected to a fuel tank (not shown), a purge pipe 130 connected to the engine 106, and an air hose 1 serving as an air opening pipe member.
32 are connected. An opening 132 </ b> A on the distal end side of the air hose 132 is fixed to the outer surface of the air cleaner 116 in the engine room 104 with a fixture 134.

[0004] As such a canister mounting structure,
For example, JP-A-9-96258 and JP-A-9-25
No. 855. JP-A-9-96258
In the device disclosed in Japanese Patent Application Publication No. JP-A-2006-115, a canister is arranged inside an outer peripheral forming line in a plan view of the assembly of an engine and a transmission. JP-A-9-2
Japanese Patent Application Laid-Open No. 5855 discloses a module in which the open circuit circuit component of the canister is mounted on a mounting bracket of the canister.

[0005]

However, in the conventional canister mounting structure, the opening on the tip end side of the air hose connected to the canister is arranged in the engine room or in the closed sectional space of the vehicle body member. During refueling, evaporative fuel discharged from the canister to the air hose stays in the engine room, and the accumulated evaporative fuel is sucked into the engine from the intake port of the air cleaner. There has been a problem that the fluctuations to the rich side cause deterioration of the exhaust gas performance, a decrease in the output of the engine, and the like, thereby adversely affecting the engine control.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a canister mounting structure in which a canister provided with an open-to-atmosphere member is disposed in an engine room of a vehicle in order to eliminate the above-mentioned disadvantages. The invention is characterized in that the canister is provided on a vehicle body member that defines a room, and an opening of the canister on the tip end side of the air release pipe member is disposed outside the vehicle body member.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, since the opening at the tip end of the open-to-atmosphere pipe member of the canister is disposed outside the vehicle body member, for example, during refueling or the like, the fuel vapor evaporates outside the engine room. As a result, there is no danger of the fuel vapor remaining in the engine room, and the fuel vapor is prevented from being sucked into the engine from the intake port of the air cleaner. To prevent
It is possible to improve the exhaust gas performance and the output of the engine, and to prevent the engine control from being adversely affected.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 5 show a first embodiment of the present invention. 4 and 5, 2 is a vehicle,
Reference numeral 4 denotes an engine room, 6 denotes a floor panel as one body member, 8 denotes an engine installed in the engine room 4, 1
0-1 and 10-2 are right and left body frames (chassis), 12 is a seat, 14 and 14 are headlights, 16
16 is a front wheel, and 18 and 18 are rear wheels.

The floor panel 6 has a front side 6A, a seat side wall 6B rising from the front side 6A, and a seat upper wall 6C oriented horizontally.

Right and left body frames 10-1 and 10-
Inside the engine room 4 with the floor panel 6 inside
Are formed, right and left vertical panels 20-1 and 20-2 are set up in the vertical direction. On this right,
The left vertical panels 20-1 and 20-2 are connected to right and left frame floor covers 22-1 and 22-2, which are other body members oriented in the horizontal direction. The right and left frame floor covers 22-1 and 22-2 are located at the same level as the front side 6A of the floor panel 6.

As a result, in the vehicle 2, the front wheels 16
The engine room 4 is formed in the center part slightly behind the position 16 and the right frame floor cover 22-1 is formed.
A right room space 24-1 is formed above the right side of the engine room 4 so as to extend the engine room 4 adjacent to the right side of the engine room 4, and a left side of the engine room 4 is formed above the left frame floor cover 22-2. A left room space 24-2 is formed to extend the engine room 4 adjacent to the left frame floor cover 22-1, and a right frame space 26-1 is formed below the right frame floor cover 22-1. -2 below left frame space 26
-2 is formed.

The engine 8 is provided with an intake device 28 and a fuel vapor control device 30. The intake device 28 includes an air cleaner 32, an intake pipe 34, a throttle body 36, and a resonator 38. The air cleaner 32 includes an intake port 32A located on the rear side of the vehicle.
2 provided on the right frame floor cover 22-1. One end of the intake pipe 34 is an air cleaner 32.
And the other end is attached to the throttle body 36. The throttle body 36 is attached to the engine 6. The resonator 38 is an air cleaner 32
In the right frame space 26-1 below, communicates with the bottom portion of the air cleaner 32 through a connecting pipe 46 penetrating the hole 44 of the right frame floor cover 22-1, and through a plurality of resonator mounting brackets 38A. The right frame floor cover 22-1 by the resonator mounting fixture 38B.
It is attached to the lower surface of.

The evaporative fuel control device 30 includes an air cleaner 3
2, a canister 48 is provided on the right frame floor cover 22-1 with a fixture (not shown). The canister 48 contains an adsorbent such as activated carbon for adsorbing fuel vapor. The canister 48 has an evaporative pipe 5 connected to a fuel tank (not shown).
The purge pipe 52 and the open-to-atmosphere pipe member 54 that are connected to the engine 0 and the engine 6 are connected. This open air pipe member 5
The air hose 58 includes an air hose 58 having one end connected to the cleaner-side connection portion 56, and a fixed connection pipe 60 connected to the other end of the air hose 58 and penetrating the right frame floor cover 22-1.

Therefore, the opening 54A on the distal end side of the open-to-atmosphere pipe member 54 is provided below the right frame floor cover 22-1 and opened in the right frame space 26-1 isolated from the engine room 4. Can be

On the other hand, in the left room space 24-2, a battery 62 is installed on the left frame floor cover 22-2.

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

In the intake device 28, an air cleaner 32
The intake air in the engine room 4 is taken into the intake intake portion 32A. The intake air is supplied from the air cleaner 32 to the engine 8 via the intake pipe 34 and the throttle body 36.

In the evaporative fuel control device 30, the evaporative fuel from the fuel tank is sent from the evaporative pipe 50 to the canister 48, where it is adsorbed. The operation of the engine 8 causes the canister 48 to operate.
Since the atmosphere is introduced through the opening 54A of the atmosphere opening pipe member 54, the fuel vapor adsorbed by the canister 48 is released and supplied to the engine 8 from the purge pipe 52.

On the other hand, during refueling when the engine 8 is stopped, the evaporated fuel in the fuel tank is discharged from the open-to-atmosphere member 54 via the evaporative pipe 50 and the canister 48.

In the first embodiment, the opening 54A on the distal end side of the open-to-atmosphere pipe member 54 is opened below the right frame floor cover 22-1 and located outside the engine room 4. Since the evaporated fuel from the open-to-atmosphere pipe member 54 does not stay in the engine room 4, the evaporated fuel is not sucked into the intake port 32 </ b> A of the air cleaner 32, thereby changing the air-fuel ratio. In addition, the exhaust gas performance and the output of the engine 8 can be improved to prevent the engine control from being adversely affected.

FIG. 6 shows a special structure of the present invention.
It shows an embodiment.

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

The features of the second embodiment are as follows. That is, in the middle of the open-to-atmosphere pipe member 54,
A scalable fuel storage 72 is provided, and the engine 8 is located closer to the opening 54A than the fuel storage 74.
A check valve 74 for permitting the introduction of the atmosphere during the operation of the fuel cell and for preventing the discharge of the fuel vapor during the refueling is provided.

According to the structure of the second embodiment, during refueling, the check valve 74 prevents the evaporated fuel from being discharged to the outside, and stores the evaporated fuel in the evaporated fuel storage section 72. During operation, the outside air is introduced from the opening 54A by the negative pressure acting in the canister 48 from the engine 8 and the evaporative fuel storage 7
2 can be supplied to the canister 48 side.

In the present invention, a spare tank is provided integrally with the canister, and the fuel vapor from the canister is temporarily stored in the spare tank. It is also possible to discharge this evaporated fuel to the outside or to supply it to the engine while the engine is operating, in consideration of the capacity and the concentration.

[0026]

As is apparent from the above detailed description, according to the present invention, a canister is provided in a vehicle body member that defines an engine room, and an opening at the tip end of an air release pipe member of the canister is formed outside the vehicle body member. By arranging
For example, since the fuel vapor is discharged to the outside of the engine room during refueling or the like, there is no possibility that the fuel vapor stays in the engine room, and the fuel vapor is sucked into the engine from the intake port of the air cleaner. Thus, it is possible to prevent the air-fuel ratio from fluctuating, improve the exhaust gas performance, improve the output of the engine, and the like, and prevent the engine control from being adversely affected.

[Brief description of the drawings]

1 is a partial side view of the front part of the vehicle according to arrow 1 in FIG. 3;

FIG. 2 is a bottom view of the resonator.

FIG. 3 is a partial plan view of a front portion of the vehicle shown in FIG.

FIG. 4 is a schematic plan view of the vehicle.

FIG. 5 is a schematic front view of the vehicle shown in FIG. 3;

FIG. 6 is a side view of a portion of an open-to-atmosphere pipe member in a second embodiment.

FIG. 7 is a partial plan view of a front portion of a conventional vehicle.

[Explanation of symbols]

 2 vehicle 4 engine room 6 floor panel 8 engine 12 seat 22 frame floor cover 24 room space 26 frame space 28 intake device 30 evaporative fuel control device 32 air cleaner 48 canister 54 air opening pipe member 58 air hose 60 fixed connection pipe

Claims (3)

[Claims] 1. A canister mounting structure in which a canister provided with an atmosphere opening pipe member is disposed in an engine room of a vehicle, wherein the canister is provided on a vehicle body member that defines the engine room, and the canister is open to the atmosphere. A canister mounting structure in which an opening on the tip side of a pipe member is disposed outside the vehicle body member. 2. The canister mounting structure according to claim 1, wherein the canister is provided on a frame floor cover which is the vehicle body member at a side of the engine room. 3. The canister according to claim 1, wherein the engine room has a room space defined below the seat by a floor panel as the vehicle body member that supports a lower side of the seat. Mounting structure.