Bidirectional valve device of automobile fuel system

Abstract

The invention discloses a bidirectional valve device of an automobile fuel system. A main valve body comprises a left cavity and a right cavity. A valve element is mounted in a chamber formed by the left cavity and the right cavity. A first valve hole and a second valve hole which are opposite in structure are formed in the left cavity, and the periphery of the left cavity is sleeved with an auxiliary valve body. The auxiliary valve body comprises an auxiliary cavity, the auxiliary cavity is formed by connecting a small left cavity and a small right cavity in a butt joint manner to be annular, and active carbon is mounted between sealing felt in the auxiliary cavity. The small left cavity is connected with a left side pipe, the small right cavity is connected with a right side pipe, and a cap is mounted on an end opening pipe mouth of the right side pipe. The bidirectional valve device is long in service life; the problem that air flow in a valve is blocked is solved; the work state is stable, and pressure release is fast; when a pipeline of the fuel system is blocked, filtered pressure is fast supplemented into an oil tank, and filtered pressure oil steam is released; and the structure is simple, cost is low, and application and popularization are facilitated.

Description

technical field [0001] The invention relates to a gas balance technology inside and outside an automobile fuel system, in particular to a two-way valve device of the automobile fuel system. Background technique [0002] The two-way valve is an important structure in the automobile fuel system to balance the pressure between the inside of the system and the outside atmosphere. The basic performance requirements of the two-way valve are: when the positive pressure through the valve is 7.5kPa, the flow rate through the valve is ≥16L / min, and when the positive pressure is 3.4kPa, the flow rate is ≤0.1L / min; when the negative pressure through the valve is ≤0.1L / min When the pressure is 4.1kPa, the flow through the valve is ≥1.9L / min. It is composed of a cylinder set between two nozzles, and there are various components such as gaskets inside the cylinder. Gaskets are generally composed of materials such as rubber. However, when the gasket is aged, it is easy to stick to the va...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that by providing a two-way valve device, it will not cause failure due to the aging of the internal structural parts of the valve, and solve the problem of air flow in the valve being blocked, the working state is stable, the pressure is released quickly, and When the pipeline of the fuel system is blocked, the inside of the fuel tank can quickly receive the filtered pressure supplement and the pressure oil vapor released by the filter, and maintain a balance with the outside atmosphere. The product has a long service life, simple structure, low cost, and is easy to popularize and apply.

Images