Movable booster type pump outlet control two-stage variable oil pump

Abstract

The invention discloses a movable booster type pump outlet control two-stage variable oil pump, and relates to the technical field of oil pumps. The movable booster type pump outlet control two-stagevariable oil pump comprises a pump body, a pump cover, a pump shaft, a rotor, a sliding block and a spring; a feedback cavity is arranged in the pump body; a control valve is arranged on the pump cover; a plunger is arranged in a valve hole of the control valve; a control valve spring is abutted between the plunger and the rear end of the valve hole; a convex ring is arranged on the circumferential surface of the middle of the plunger; a plug is arranged at the front end of the plunger; an oil inlet and an oil outlet are formed in the side wall of the control valve; the oil inlet communicateswith a pump outlet and located in the front side of the convex ring; a control valve normally-open cavity communicating with the pump outlet is formed between the convex ring and the plug; the oil outlet communicates with the feedback cavity, and is located in the rear side of the convex ring; the pump cover is provided with an oil channel communicating with the pump outlet and an inlet in the front end of the control valve hole; and an electromagnetic valve is arranged in the oil channel. Two-stage variables are achieved through the internal oil duct of the oil pump and the electromagnetic valve, and a feedback oil hole does not need to be designed in an engine cylinder body, so that the structure of the engine cylinder body is greatly simplified.

Description

technical field [0001] The invention relates to the technical field of oil pumps, in particular to a two-stage variable variable oil pump with outlet control of a mobile booster pump. Background technique [0002] Conventional two-stage variable oil pumps usually need to reserve feedback oil holes on the engine block in practical applications, so that the feedback oil from the main oil gallery can enter the oil pump to drive the oil pump to change the displacement, which leads to engine The design of the cylinder block will be subject to certain restrictions, and the oil passage connection between the oil pump and the engine block also complicates the overall structure. Under the current trend of more and more streamlined and effective engine systems, this conventional There are obvious deficiencies in the two-stage variable oil pump. Contents of the invention [0003] The purpose of the present invention is to provide a mobile supercharged pump outlet control two-stage v...

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Problems solved by technology

[0002] Conventional two-stage variable oil pumps usually need to reserve feedback oil holes on the engine block in practical applications, so that the feedback oil in the main oil passage can enter the oil pump to drive the oil pump to change the displacement, which causes the engine The design of the cylinder block will be subject to certain restrictions, and the oil passage connection between the oil pump and the engine block also complicates the overall structure. Under the current trend of more and more streamlined and effective engine systems, this conventional There are obvious deficiencies in the two-stage variable oil pump

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