JPH03100364A - Canister - Google Patents

Abstract

PURPOSE:To prevent deterioration of performance due to wearing of an activated carbon layer, even when a tilt is generated, by setting up a porous plate in each activated carbon layer, divided by a partitioning wall, so as to decrease a value in the dimension of a tilted end part even when the tilt is generated. CONSTITUTION:Activated carbon in a canister 3 is divided into activated carbon 4a and 4b by a partitioning wall 9, and the activated carbon 4a and 4b is charge-compressed respectively by porous plates 7a, 7b. The porous plates 7a, 7b are moved to the upper respectively by compression coil springs 6a, 6b. In this way, even when each porous plate is tilted in a value of degree theta by eccentrically deforming the compression coil springs 6a, 6b, the dimension in a rough part of the activated carbon obtains a value l2 in a permissible range with a defect eliminated. In this way, as a result of decreasing collision of the fellow activated carbons, against each other the deterioration characteristic is improved to an extent practically with no problem.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a canister for an internal combustion engine, and particularly to the internal structure of a canister for a two-wheeled vehicle.

[Conventional technology]

As shown in Fig. 1, an example of a conventional canister is that when an internal combustion engine 1 is stopped, vaporized gasoline generated in the upper space of a fuel tank 2 is adsorbed and protected by activated carbon 4 in a canister 3, making it harmless. Since the gas is released into the atmosphere, it does not pollute the atmosphere, and when the internal combustion engine 1 is operating, air is sucked in from the atmosphere by the negative pressure in the intake passage 5, and this force causes the protected evaporation mentioned above. The gasoline component of gasoline is desorbed from the activated carbon 4 and burned in the internal combustion engine, and the activated carbon 4 layer is regenerated and prepared for the next adsorption. In this canister, four layers of activated carbon are compressed by a compression coil spring 6 through a perforated plate 7, and due to vibrations during operation of the internal combustion engine 1, each particle of the activated carbon 4 collides with each other and wears out, resulting in a decrease in performance. It prevents However, as shown in FIG. 2, due to the eccentricity of the compression coil spring 6, the perforated plate 7 is tilted (inclination θ) and the activated carbon 4 in the portion 8 becomes coarsely filled.
It wears out and becomes wet for the first time. This affected the entire four layers of activated carbon, resulting in a decrease in the performance of the canister.

Generally, as shown in FIG. 3, the eccentricity of the spring decreases as the number of coil turns increases. However, in the case of a canister, since the installation space is narrow, it is not possible to take a sufficiently large number of coil turns, and therefore it has not been possible to prevent the above-mentioned zero inclination.

[Problem to be solved by the invention]

An object of the present invention is to prevent performance deterioration due to wear of the four activated carbon layers by reducing the dimension 121 in FIG. 2 even if the inclination occurs.

[Means to solve the problem]

In order to achieve the above object, a perforated plate 7 is installed for every four layers of activated carbon separated by the partition wall, so that even if the inclination θ occurs, the value of the 01 dimension is made small.

[Effect]

The 01 dimension is determined by the inclination 0 and the length of the perforated plate 7. Therefore, as described above, by providing a plurality of pores, the length becomes shorter and the Qx dimension becomes smaller.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. The activated carbon in the canister 3 is divided by a partition wall 9 into 4a and 4b. 7a and 7b are perforated plates, each containing 4 activated carbon
Compress and fill a and 4b.

6a and 6b are compression coil springs for moving the perforated plates 7a and 7b upward in the figure, respectively.

Because of the above configuration, even if the compression coil springs 6a and 6b are eccentric and each perforated plate is tilted at a value of 0, the dimension of the rough part of the activated carbon will be the value of Qz, which is within the allowable range, and as described above. This will eliminate the drawbacks of

In other words, the values of Qx and Qz are one effect of the present invention.

As a result, the collision between the activated carbons is reduced, and the deterioration characteristics are improved to a level that does not pose a problem in practice.

〔Effect of the invention〕

According to the present invention, highly reliable effects can be obtained by combining conventional techniques. Furthermore, since vibration resistance is improved, it is ideal for canisters for two-wheeled vehicles. Furthermore, the above effects can be achieved by changing the internal structure.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the conventional system configuration of the present invention, Fig. 2 is a diagram showing the lower structure of a conventional canister, Fig. 3 is a diagram showing the number of coil turns and eccentricity of the compression coil spring, and Fig. 4 is a diagram showing the conventional system configuration. It is a figure showing the lower part W structure of the canister of the present invention. 3... Canister, 4... Activated carbon, 6... Compression coil Figure 1 Broom 2 Figure

Claims (1)

[Scope of Claims] 1. An activated carbon container is provided with a partition wall, and in a canister in which activated carbon layers are separated by the partition wall, each activated carbon layer is compressed and filled with independent porous plates. Canista featuring. 2. The canister according to claim 1, wherein the perforated plate is formed by compressing and filling an activated carbon layer with a spring.