JPS60236835A - Car canister installing construction - Google Patents

Abstract

PURPOSE:To prevent muddy water from entering a canister and facilitate a canister installing operation by inserting the drain part of said canister into the opening part of a through a grommet and introducing it out of an engine room. CONSTITUTION:A canister 11 consists of a canister body 12 and a canister drain 13. With the drain part 13b being inserted into the opening part 15c of the horizontal placing surface part 15b of a hoodredge 15 through a grommet 16 and introduced out of an engine room E, the canister 11 is supported by the vertical wall part 15a of the hoodredge 15 via a mounting bracket 14. In the grommet 16, the opening peripheral part 15d of the hoodredge 15 is fitted into its fitting groove 16a while the drain part 13b is inserted into its inserting hole 16b, and a cylindrical partition part 16c is extended downward so as to enclose the drain part 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a canister arrangement structure for disposing a canister in the engine room of an automobile.

January 1 Generally, a canister is a device that prevents evaporative gas generated from a fuel tank from escaping into the outside air by adsorbing it to the activated carbon inside the canister. was.

That is, the canister 1 has a canister drain 3 attached to the bottom of a canister body 2 containing activated carbon, and is attached to a hood ridge 5 forming the inner wall of the engine room via a mounting bracket 4. One end of a drain hose 6 is connected to the portion 3a. And this drain hose 6
The other end faces through the hole 7a of the side member 7 into the space A formed by the side member 7 and the footridge 5, and the canister 1 is disposed in the engine room E. In addition, code 8 is reinforcement, 9 is freon 1-
It's a fender.

When the engine is stopped, etc., evaporative gas generated from a fuel tank (not shown) is guided to the canister body 2, where hydrocarbons (HC) are adsorbed on activated carbon. It is radiated from the air filter into the space A outside the engine room E via the canister drain 3 and the drain hose 6. Even though HC is adsorbed by activated carbon, it does not mean that all of it is adsorbed.
Since it is dangerous to dissipate evaporative gas containing HC into the engine room E, the drain hose 6 is used to dissipate it outside the engine room E as shown in 1-1. (Refer to Automotive Engineering Handbook, Volume 6).

During engine operation, fresh air is introduced from the air filter into the canister body 2 through the drain hose 6 and the canister drain 3, and the adsorbed HC is separated from the activated carbon by this fresh air. The air containing HC (purge air) is passed through an intake manifold (not shown) and combusted in the fuel chamber.

However, in such a conventional canister arrangement structure, it is very troublesome to arrange the drain hose 6 in the engine room E where parts are crowded, and the layout is difficult. Moreover, there was a risk of damage due to contact with equipment that becomes extremely hot.

This invention was made in view of the conventional situation, and it effectively prevents muddy water from entering the canister, and it can be arranged without using a drain hose, which is difficult for the layout. The object of the present invention is to provide a canister arrangement structure that facilitates work.

In order to achieve this objective, the canister arrangement structure of the present invention has the canister drain part exposed to the outside of the engine room through a grommet in the opening of the hood ridge panel.
The drain part is covered with a cover, and the grommet is extended downward to provide a partition part that blocks the space between the drain part and the outside of the cover.

Leaving - Shi Yiyi Yi Hereinafter, this invention will be explained based on examples.

1 to 3 are diagrams showing one embodiment of the present invention.

First, to explain the structure, the canister 11 is composed of a canister main body 12 and a canister drain 13.

The canister main body 12 has a substantially cylindrical shape, and is provided with an evaporative gas tube 12a and a purge controller 1-roll valve 12b connected to a fuel tank and an intake manifold (not shown) on the upper surface. Activated carbon is of course provided inside, and an air filter (not shown) is provided at the bottom.

On the other hand, the canister drain 13 is connected to the canister main body 12.
A recess 13a is formed which is continuous with the air filter, and a drain portion 13b is provided to protrude downward from the bottom of the recess 13a.

The canister 11 is mounted on the mounting bracket in a state where the drain portion 13b is inserted through the grommet 16 into the opening 15c of the approximately horizontal mounting surface portion 15b of the hood ridge 15 and is exposed to the outside of the engine room. It is supported by the vertical wall portion 15a of the hood ridge 15 via 14.

Further, as shown in FIGS. 1 and 3, the grommet 16 is attached to the opening peripheral portion 15d of the hood ridge 15 in the fitting groove 16a.
is fitted, and the drain part 1'3 is inserted into the insertion hole 16b.
b is inserted through the drain part 13b, and a cylindrical partition part 16c extends downward to surround the drain part 13b.

Further, a cover 17 is provided to cover the drain portion 13b. As shown in FIGS. 1 and 2, this cover 17 has an approximately tray shape with an open side wall, and has a U-shaped flange 17b provided at the top of a vertical wall 17a. Mounting holes 17c are drilled.

In addition, approximately at the center of the bottom surface 17d of this car A-17, there is a
A substantially cylindrical partition wall 17e is provided protrudingly, and this partition wall 17
The upper end of the grommet 16 is located within the partition portion 16c, and the tip of the drain portion 13b is located within the partition wall 17e.

Such a cover 17 has the mounting hole 1 of the flange portion 17b.
A screw (not shown) is inserted through 7c and screwed onto the hood ridge mounting surface 15b to attach the canister.Next, the operation of the canister structure having such a structure will be explained.

When the engine is stopped, etc., evaporative gas generated from the fuel tank is guided into the canister body 12 through the evaporative gas tube 12a, as in the conventional case, where l(C) is adsorbed on activated carbon, and then the canister body 12 is The air is radiated from the air filter to the outside of the engine room E through the drain part 13b of the canister drain 13.

On the other hand, while the engine is operating, the purge control I/roll valve 12b operates, and fresh air is introduced into the canister main body 12 through the canister drain 13.

With this fresh air, l(C) is separated from the activated carbon, and the air containing HC is guided to the intake manifold via the purge control valve 12b and is combusted in the combustion chamber.

- By the way, in such a canister arrangement structure, since the drain portion 13b of the canister 11 is directly exposed to the outside of the engine room E, there is no need to arrange the drain hose 6 as in the conventional case.

Canister arrangement work can be easily performed without any difficulty in arranging the drain hose 6.

Also, for muddy water etc. caused by splashing, cover 1 is most of the time.
7 is blocked by the vertical wall portion 17a and the bottom surface portion 17d,
Although it does not enter the cover 17, even if it does, it is blocked by the partition 16c of the grommet 16 and the partition wall 17e of the cover 17, and the function of the canister 11 can be maintained without directly entering the drain part 13b. . In this case, even if the cover 17 does not have the partition I, the Fl wall 17e, the partition 16c of the grommet 16 can block muddy water etc. from entering the drain part 1.3b, but the partition wall 17eI
It is more effective to provide t.

Note that the partition portion of the grommet, which is a component of the present invention, is not limited to the cylindrical shape as in the above embodiment.
As described above, according to the present invention, the cover can be formed into various shapes such as a plate shape as long as it blocks muddy water etc. entering from outside the cover from directly hitting the drain part 13b. For example, by inserting the drain part of the canister into the opening of the hood ridge through the grommet so as to face the outside of the engine room, and by forming a partition part in the grommet, it is possible to prevent muddy water etc. from entering the canister. With the prevention 1-, there is no need to use a drain hose, so the canister installation work can be easily performed.

[Brief explanation of drawings]

1 to 3 are views showing one embodiment of the automotive canister arrangement structure of the present invention, in which FIG. 1 is a sectional view of the same structure, FIG. 2 is a perspective view of the cover, and FIG. 3 is a grommet. FIG. 4 is a sectional view similar to FIG. 1 showing a conventional automotive canister arrangement structure. 11... Canister, 13b... Drain part, 15
...Hood ridge, 15c...opening. 16... Grommet, 16c... Partition, 17...
・Cover, E...Engine room. Figure 1 Figure 2

Claims (1)

[Claims] The drain part of the canister is inserted into the opening of the hood ridge through the grok 1- so as to face outside the engine room, and the train part is covered with a cover, and the grok 1- is extended downward to connect with the drain part. A canister arrangement structure for an automobile, characterized in that a partition is formed to block the outside of the cover.