Fuel oil pump assembly of dual-oil-tank system

Abstract

The invention discloses a fuel oil pump assembly of a dual-oil-tank system. The fuel oil pump assembly comprises an oil storage bucket, an oil storage bucket cover, an oil return pipeline and an oil outlet pipeline. An oil pump, an oil pump connecting pipe and an oil inlet pipe are arranged in the oil storage bucket. The fuel oil pump assembly is characterized in that a shuttle valve is further arranged in the oil storage bucket and is arranged on the oil return pipeline to control on-off of the oil return pipeline; fuel oil pumped in the oil inlet pipe is in drive fit with the driving end of the shuttle valve, the oil inlet pipe is fixed in the oil storage bucket in an ultrasonic welding manner, and the oil inlet pipe and the shuttle valve are fixed in an ultrasonic welding manner; the oil pump connecting pipe and the shuttle valve are fixedly connected with the oil storage bucket cover through a buckle structure after being subjected to ultrasonic welding, and the oil pump is mounted in the oil pump connecting pipe and fixed in the oil storage bucket through the buckle structure on the oil storage bucket cover; and a check valve is arranged at an oil inlet hole. The fuel oil pump assembly is reasonable in structure, buckle connecting and fixing are adopted, the structure is simple, assembly is easy, and the umbrella-shaped check valve is flexible in movement and good in check sealing performance.

Description

technical field [0001] The invention relates to an improved invention of auto parts, in particular to an improved invention of a fuel pump assembly of a dual fuel tank system. Background technique [0002] In the prior art, in order to optimize the structure of the vehicle design and satisfy the fuel tank with larger capacity, the vehicle can be designed as a fuel supply system with a double fuel tank structure. However, the double fuel tank structure is prone to problems in terms of fuel return. There is no on-off control in the fuel return system of the pump assembly. For example, when the A fuel tank assembly is working, its fuel return system may flow excess fuel back to the A or B fuel tanks, which may easily cause the B fuel tank to overflow. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a fuel pump assembly of a dual fuel tank system which is reasonable i...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the vehicle is designed to optimize the structure and meet the needs of larger capacity fuel tanks. The vehicle can be designed as a fuel supply system with a double fuel tank structure. However, the double fuel tank structure is prone to problems in terms of fuel return. The oil return system of the pump assembly does not have on-off control. For example, when the A fuel tank assembly is working, its oil return system may flow excess fuel back to the A or B fuel tank, which may easily cause the B fuel tank to overflow

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