Automobile fuel tank valve body arrangement method and structure

Abstract

The invention relates to an automobile fuel tank valve body arrangement method and structure. The valve body arrangement structure comprises a fuel tank upper shell, a safety valve, an evaporation pipe, an oil discharge valve and an oil discharge pipe. The oil tank upper shell is provided with an air vent, the safety valve is installed on the inner wall of the oil tank upper shell, and the evaporation pipe is communicated with the air vent and the safety valve. A sinking groove is further formed in the oil tank upper shell, and the evaporation pipe passes through the sinking groove to form a sinking section; the oil discharge valve is mounted on the inner wall of the oil tank upper shell; the oil discharge pipe is communicated with the oil discharge valve and the sinking section; the oil drain valve is arranged to communicate with the sinking section of the evaporation pipe, when the liquid level in the fuel tank descends to a certain height, fuel accumulated in the sinking section flows back into the fuel tank through the oil drain valve, and the situation that the pressure inside and outside the right half part of the fuel tank is unbalanced due to pipeline blockage of the sinking section is avoided; 2, the oil discharge valve is preferably a GVV valve, and when the oil tank is full of the oil level, an inner valve body of the GVV valve floats upwards under buoyancy and is automatically closed; and when the fuel level drops to a certain height, the floater in the GVV valve sinks and is automatically opened.

Description

technical field [0001] The invention relates to the technical field of automobile fuel tanks, in particular to an arrangement method and structure of a valve body of an automobile fuel tank. Background technique [0002] Since the implementation of the National VI regulations (GB 18352.6-2016), the fuel tank structure has undergone major changes compared with the National V period. The most notable feature of the National VI fuel tank is that the exhaust pressure relief during refueling is completely performed through the FLVV valve and the GVV valve, while the National V models use the refueling exhaust pipe to achieve pressure relief. [0003] The volatilization speed of gasoline is related to the temperature. The higher the temperature, the faster the volatilization of gasoline. In the closed cavity, the volatilized oil and gas will generate pressure. The higher the temperature, the greater the pressure. When the car is working, the exhaust pipe will emit high temperatur...

AI Technical Summary

Problems solved by technology

Due to the sinking section of the pipeline, the oil accumulates in the sinking section and blocks the pipeline. The left and right parts of the fuel tank cannot be connected through the pipeline. This may cause an imbalance of pressure inside and outside the right half of the fuel tank, and extreme working conditions will cause the fuel tank to fail.

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