China VI metal fuel tank

Abstract

The invention provides a national six metal fuel tank, which includes a national six fuel tank body, a gravity valve, an oil pump assembly and an oil filling pipe. The national six fuel tank body is made from metal, and is provided with a lower tank body and an upper tank body sealing and covering an opening of the lower tank body, the lower tank body and the upper tank body form an accommodationchamber for storing fuel, the gravity valve is internally arranged at the inner top of the upper tank body, and is connected with the upper tank body in a sealed mode through an installation assembly,the oil pump assembly is located in the accommodation chamber, and provided with an oil pump and an oil measurement sensor assembly which are installed on the bottom wall of the lower tank body, theoil filling pipe is fixed to one side wall of the national six fuel tank body, an oil filling port communicates with the accommodation chamber, and a check valve sleeves the position, in the accommodation chamber, of an oil filling pipeline. A plurality of leakage points on the fuel tank are reduced, oil gas evaporation emission of the fuel tank can be effectively reduced, thus the function of oilgas evaporation emission is lowered, the product environment-friendly performance is improved, and thus fuel emission of the fuel tank meets higher standards.

Description

technical field [0001] The present invention relates to the field of fuel tanks, and more specifically, to the National VI metal fuel tank. Background technique [0002] With the development of the national automobile industry, the country is about to implement the national six emission standards for automobiles. The state and society have put forward higher requirements for the environmental protection of vehicles. Compared with the national five emission standards, the national six emission standards for automobiles have stricter limit requirements by 40%. -50%, the fuel tank is used as the main part of the fuel storage system of the vehicle, and the environmental protection is also required to be improved. [0003] The existing fuel tank requires an opening on the fuel tank due to the arrangement of the gravity valve, and the opening on the fuel tank becomes a leakage point for oil vapor to evaporate and discharge; moreover, when the oil cap on the filling pipe is opened,...

AI Technical Summary

Problems solved by technology

[0003] The existing fuel tank requires an opening on the fuel tank due to the arrangement of the gravity valve, and the opening on the fuel tank becomes a leakage point for the evaporation and discharge of oil and gas; moreover, when the oil cap on the filling pipe is opened, the oil and gas in the fuel tank escape into the atmosphere, When the pump cover of the existing oil pump is installed, the tightening pressure applied by the bolt pressure plate to the pump cover is uneven, so that the sealing ring filled between the pump cover and the fuel tank body is squeezed and deformed unevenly, resulting in poor sealing effect of the fuel tank Cause fuel seepage, it can be seen that there are many seepage points in the existing fuel tank, which can no longer meet the requirements of customers and national regulations

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