Automobile fuel tank valve function testing device

Abstract

The invention discloses an automobile fuel tank valve function testing device which comprises a gas source device, wherein the gas source device is connected in series with a positive pressure tank, a negative pressure tank, an accumulator tank and a fuel tank valve in sequence; the positive pressure tank and the negative pressure tank are connected in parallel; the accumulator tank and the fuel tank valve are connected in parallel; a gas outlet of the gas source device is respectively connected with gas inlets of the positive pressure tank and the negative pressure tank; gas outlets of the positive pressure tank and the negative pressure tank are connected with a gas inlet of the accumulator tank; a gas outlet of the accumulator tank is connected with a gas inlet of the fuel tank valve; a valve intake pressure sensor and a valve intake flow quality sensor are arranged on the gas inlet of the fuel tank valve; a valve gassing pressure sensor and a valve intake flow quality sensor are arranged on the gas outlet of the fuel tank valve; the fuel tank valve is fixed on a rotatable testboard. According to the automobile fuel tank valve function testing device, the positive pressure tank, the negative pressure tank, the accumulator tank and the testboard are connected and coordinated skillfully, so as to collect the analytical pressure and flow quantity data. Therefore, the opening pressure, closing pressure and reversed closing angle of the fuel tank valve can be obtained accurately, and whether the fuel tank valve function being tested is qualified or not can be judged.

Description

technical field [0001] The invention relates to a function test device for automobile parts, in particular to a function test device for a fuel tank valve of an automobile. Background technique [0002] In order to ensure the balance between the pressure in the fuel tank and the atmospheric pressure during the normal working process of the automobile fuel tank, various valve bodies are usually installed on the fuel tank, such as: breathing valve, multi-function valve, or gravity valve, etc. When the fuel tank in the fuel tank When heat expands or refuels the fuel tank, the oil level rises and the pressure in the fuel tank increases. When the pressure is higher than the external pressure to a certain extent, the valve opens; when the fuel in the fuel tank shrinks due to cooling or the fuel pump pumps oil outward When the oil level drops, the pressure in the fuel tank decreases. When the pressure is lower than the external pressure to a certain extent, the valve should also be...

AI Technical Summary

Problems solved by technology

If there is a problem with the quality of the valve of the fuel tank, if it is not opened when it should be opened, and if it is not closed when it should be closed, it may cause leakage, deformation, or even explosion of the fuel tank.

As the fuel tank is part of the safety regulations, the quality problem of the fuel tank due to the valve not only has the risk of a vehicle recall by the OEM, but also causes great harm to the life and property of the user. Therefore, it is necessary to accurately test the fuel tank valve. Functionality is an important test for fuel tanks

At present, the fuel tank valve function test equipment is relatively simple. Usually, a pressure gauge is connected to the air inlet of the valve, and the gas at the air outlet is passed into the water, and then the pressure at the air inlet is continuously increased. When the air outlet in the water is just When bubbles start to appear, the valve is considered to be open. At this time, the reading of the pressure gauge is regarded as the opening pressure of the valve. This method is greatly affected by human and environmental factors, the test accuracy is low, and the information of flow rate and turning angle cannot be obtained. Checking the quality of the valve has little effect

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