Valve member and displacement adjustment system

Abstract

The invention provides a valve member and a displacement adjusting system, and relates to the technical field of internal combustion engine lubricating systems. The valve member comprises a containingmember provided with a containing cavity, and a third cavity located between a first cavity and a second cavity is formed in the containing cavity. A second hole part for communicating the second cavity with the outside and a fourth hole part for communicating the third cavity with the outside are formed in the containing member. In the first working state of a valve element assembly, when the valve element assembly can move from the first preset position to the second preset position, the second hole part communicates with the fourth hole part through the third cavity. The valve member is applied to the displacement adjusting system, secondary adjustment of the displacement of a variable pump is achieved through cooperative control over a control valve and the valve member, and comparedwith a traditional double-adjusting-cavity variable pump, the valve member is high in response speed and stable in variable control. In addition, the pressure curve output by the displacement adjusting system is more suitable for the requirements of an engine, and the output curve of the high-pressure controlled variable pump is stable.

Description

technical field [0001] The present application relates to the technical field of internal combustion engine lubrication systems, in particular to a valve component and a displacement regulating system. Background technique [0002] The oil pump continuously supplies lubricating oil under pressure to all friction parts of the entire engine. If the oil supply of the oil pump is insufficient, it will cause the engine to lack sufficient lubricating pressure and cause severe engine wear. However, if the oil supply is kept at a very high level, it will inevitably increase the internal loss of the engine and cause unnecessary waste. [0003] In the prior art, a variable displacement oil pump is used to solve the above problems. The variable displacement oil pump can adjust its own oil discharge according to the engine speed and the feedback oil pressure of the lubrication system. Taking the vane oil pump with adjustable displacement as an example, when the feedback oil pressure r...

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Problems solved by technology

[0004] But only through the above variable oil pump, it is difficult to ensure that the pressure curve output by the variable oil pump adapts to the needs of the engine, and it is prone to sudden changes in output pressure. In addition, when only relying on the variable oil pump to adjust the output pressure according to the feedback oil pressure , the response speed is relatively slow

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