Variable displacement oil pump

Abstract

The invention discloses a variable displacement oil pump which comprises a rotor oil pump body; a shell of the pump body is provided with an oil inlet and an oil outlet; the pump body is internally provided with a driving inner rotor and a driven outer rotor, and is provided with an oil inlet cavity, an oil outlet cavity and an oil inlet channel and an oil outlet channel; the driving inner rotor is driven by a driving shaft, and is also provided with an overload protective valve and an oil pump cover; the overload protective valve is arranged on the oil pump cover, and is communicated with the oil inlet cavity; an adjusting sliding block and a pressure adjusting spring used for restraining the adjusting sliding block are added into the variable displacement oil pump; and the adjusting sliding block is arranged between the inner rotor and the outer rotor by an adjusting sliding block mounting cavity, and is positioned at a joint area between the oil inlet channel and the oil outlet channel. The two parts including the adjusting sliding block and the pressure adjusting spring are added into the oil pump, and the working states and the positions of the adjusting sliding block and the pressure adjusting spring are changed in real time along with the change of the working speed of the oil pump, so that the working way in which the displacement of engine oil is passively changed by the existing variable displacement pump can be changed, and the variable displacement oil pump can be used in a more energy-saving and environment-friendly way.

Description

technical field [0001] The invention relates to a variable displacement engine oil pump, in particular to an engine oil pump suitable for automobile engines. Background technique [0002] Variable-displacement oil pumps for internal combustion engines have the advantage of saving energy, and are currently used in cars in developed countries. An adjustable (Duo-centric oil pump) used on Volkswagen's TSI series engines is variable-displacement oil pumps. [0003] Since 2006, BMW has cooperated with Peugeot and Citroen to produce 13 million 1.6L turbocharged gasoline engines. In terms of technology, we can simply understand that this engine is based on the TU series of PSA, adding gasoline The application of new technologies such as direct injection, "Twin-Scroll" turbocharger, continuously variable timing valve, variable displacement oil pump, and aluminum crankcase. The familiar MINI Cooper S, Peugeot 207CC, Citroen C4, etc. are equipped with this 1.6T engine. [0004] On S...

AI Technical Summary

Problems solved by technology

But all of them passively change the structure of the oil pump, working parts or the pressure of the pressure regulating valve and pressure limiting valve to change the amount of oil discharge, relatively speaking, it still does not meet the ideal requirements for changing the oil pump.

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