Structure of automobile fuel injection pump assembly

Abstract

The invention discloses a structure of an automobile fuel injection pump assembly. The structure comprises a pump body assembly, wherein an assembly mounting cavity is formed in the pump body assembly, a camshaft is arranged at the lower part of the assembly mounting cavity, and a first sealing plug is mounted at an opening of the assembly mounting cavity in a sealed manner; a sliding bearing is arranged above the camshaft, a guide piston assembly is mounted above the sliding bearing, is of a door-type structure and is fastened on the inner wall of the pump body assembly, a transverse detection hole is also formed in the pump body assembly on the side surface of the guide piston assembly, and a second sealing plug is mounted in the detection hole in a sealed manner; a lower spring seat ismounted at the upper end of the guide piston assembly, arranged on a plunger rod in a sleeving manner and tightly adhered to the guide piston assembly, a plunger protecting sleeve is arranged on the plunger rod in a sleeving manner, a first O-shaped sealing ring is arranged between the lower part of the plunger protecting sleeve and the pump body assembly, and a rectangular sealing ring is arranged between the upper part of the plunger protecting sleeve and the pump body assembly. The structure of the automobile fuel injection pump assembly has better working reliability, lower failure rate and longer service life.

Description

technical field [0001] The invention relates to an automobile component, in particular to an automobile fuel injection pump assembly structure, belonging to the technical field of automobile machinery equipment. Background technique [0002] The fuel injection pump, also known as the high-pressure fuel pump, is the most important component in the automotive fuel system. The function of the fuel injection pump is to increase the fuel pressure, and according to the requirements of the diesel engine's working conditions, a certain amount of fuel is supplied to the injector and injected into the combustion chamber within an accurate time. [0003] At present, fuel injection pumps can be divided into split-type fuel injection pumps and synthetic pumps according to their overall structure. Split-type fuel injection pumps are mainly composed of a plunger and a plunger sleeve. They do not have camshafts themselves, and some do not even have roller transmission parts. Because this s...

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Problems solved by technology

[0004] Aiming at the above-mentioned shortcomings in the prior art, the main purpose of the present invention is to solve the problem of insufficient reliability of the current fuel injection pump as a whole, and to provide a vehicle fuel injection pump assembly with better working reliability and longer service life. Into the structure

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