Engine lubrication system

Abstract

The invention provides an engine lubrication system. The engine lubrication system comprises a variable-displacement engine oil pump, a filter, an oil pan, a main oil line, a feedback oil line and a lubricating oil line, wherein an oil absorbing chamber of the variable-displacement engine oil pump is communicated with the oil pan; an oil discharging chamber of the variable-displacement engine oil pump is communicated with an oil inlet of the filter; an oil outlet of the filter is communicated with an oil inlet of the main oil line; the main oil line is branched to form the feedback oil line and the lubricating oil line; a pressure control valve is connected in series on the feedback oil line; an oil outlet of the feedback oil line is communicated with a feedback oil chamber of the variable-displacement engine oil pump; the lubricating oil line is communicated to a bearing of the variable-displacement engine oil pump. According to the engine lubrication system, engine oil pressure is adjusted by the variable-displacement engine oil pump and the pressure control valve, power consumption can be reduced, better lubricating effect is guaranteed, and damage to key parts of an engine is avoided; the bearing is lubricated with clean engine oil cleaned by the filter, thus, the bearing of the engine oil pump can be prevented from being worn by impurities, and the service life of the engine oil pump is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine lubricating system. Background technique [0002] The engine lubrication system is one of the important components of the engine. During the operation of the engine, the engine oil plays a very important role. It not only plays the role of lubrication, but also plays the role of sealing, cooling and buffering. In order to ensure that the oil can smoothly reach the various engine parts that need to be lubricated, the oil must have a certain pressure. [0003] In the current engine lubrication system, the oil pressure mainly changes with the speed of the oil pump. When the speed is high, the oil pressure is too high, and the pressure of the main oil circuit is adjusted by using the pressure limiting valve through the oil release method; in addition, The diameter of the intake camshaft oil passage and the exhaust camshaft oil passage will also affect the oil pressure. Whe...

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Problems solved by technology

[0005] The present invention provides an engine lubricating system to solve the problem that the oil pressure of the engine lubricating system in the prior art cannot be adjusted and the oil pump self-lubricating has more impurities. The engine lubricating system of the present invention adopts variable displacement Oil pump and pressure control valve, adding feedback oil circuit and lubricating oil circuit, so that the oil pressure can be adjusted, and can clean the lubricating oil of the oil pump, thereby prolonging the life of the oil pump

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