Atmospheric balancing device for oil tank of vehicle

Abstract

The invention discloses an atmospheric balancing device for an oil tank of a vehicle. The atmospheric balancing device comprises a main body, wherein an external connector and a connecting seat are arranged on the main body; the diameter of a vent on the external connector is smaller than 1mm; a baffle is arranged in a gas flowpath in the connecting seat; one or more vents are reserved on the baffle; the diameter of the vents is smaller than 1mm; a cavity chamber is formed between the baffle and the main body; and the vent, the cavity chamber and the vents are communicated with one another to form a gas passage. The atmospheric balancing device for an oil tank of a vehicle of the invention can intercept the flow when the oil level in the oil tank tosses about by vents with the diameter of smaller than 1 millimeter in the baffle, so that only limited amount of gasoline can enter the cavity chamber formed between the casing and the baffle via the vents with the smaller diameter when the gasoline level tosses about, and the gasoline does not flow out of the device; after entering the cavity chamber, the gasoline returns to the oil tank via the vents in the baffle under the action of the gravity; and through the application of engineering plastic, the weight of the atmospheric balancing device is reduced by 60 to 90 percent compared with that of conventional metal structures.

Description

technical field [0001] The invention relates to a component that provides gas for a gasoline tank of a vehicle and keeps the gas pressure in the gasoline tank of the vehicle in balance with the external atmospheric pressure, in particular, it belongs to an atmospheric balance device for the gasoline tank of a vehicle. Background technique [0002] At present, with the strengthening of the protection awareness of the world's environment, vehicle emission regulations are becoming more and more stringent. The traditional method of ventilating the air balance vent hole of the gasoline tank of the vehicle directly into the atmosphere will volatilize harmful gases such as hydrocarbons, causing excessive emissions and polluting the environment; the current environmental protection regulations require The fuel must not be directly diffused and volatilized into the atmosphere. Measures must be taken to prevent the volatiles from diffusing and volatilizing from the atmospheric balance ...

AI Technical Summary

Problems solved by technology

[0004] The structure of the existing air vent device is complex, all are metal processing or metal welding parts, the process is complicated, the price is high, and the quality consistency is difficult to guarantee, the metal weight is large, easy to oxidize and corrode, and the waste and pollution of environmental resources are relatively large ( Such as the exhaust gas of the welding process); and a certain amount of gasoline liquid is discharged through the vent device when the carrier is bumpy, which causes the over-concentrated volatiles to float into the atmosphere, pollute the air, and make the gas emission of fuel vapors not up to the standard

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