Method for reducing noise of oil pump, oil pump and engine

Abstract

The invention discloses a method for reducing oil pump noise. The method comprises the following steps that a power-off signal of an electromagnetic valve coil of an oil pump is obtained, and after the preset time is delayed, the additional force used for reducing the moving speed of an electromagnetic valve needle to a valve seat is exerted on the electromagnetic valve needle of the oil pump; and after the preset time of power-off of the electromagnetic valve coil, the additional force reducing the moving speed of the electromagnetic valve needle is exerted on the valve needle, so that the speed of seating of the electromagnetic valve needle can be reduced in order to reduce the impact strength of the electromagnetic valve needle and the valve seat and reduce the possibility of vibration caused by impact of the electromagnetic valve needle and the valve seat. On the one hand, by reducing impact and vibration, the stability of the oil pump is improved, the noise of the oil pump is reduced, and the NVH performance of a vehicle is improved; On the other hand, the moving speed of the electromagnetic valve needle is reduced, high-speed impact of the electromagnetic valve needle and the valve seat is avoided, the service life of the electromagnetic valve needle is prolonged, and equipment production materials are saved. The invention further discloses an oil pump for realizing the method and an engine comprising the oil pump.

Description

technical field [0001] The invention relates to the technical field of engines, and more specifically relates to a method for reducing noise of an oil pump. In addition, the present invention also relates to an oil pump and an engine with the oil pump. Background technique [0002] As the current main means of transportation, automobiles cause environmental pollution caused by noise is also becoming more and more serious. The engine is the heart of the car, and its noise accounts for the vast majority. Therefore, it is particularly important to control and improve the noise of the car engine. [0003] The oil pump is one of the important parts in the engine. For normally open oil pumps, when the solenoid valve is powered off, the solenoid valve needle keeps the oil inlet open because the spring is in a free state; when the solenoid valve is powered on, the solenoid valve coil generates magnetic force to apply suction to the solenoid valve needle through the armature, The ...

AI Technical Summary

Problems solved by technology

[0004] During the operation of the above-mentioned oil pump, a large noise is usually generated, which has a great impact on the NVH performance of the entire engine, and at the same time affects the life of the oil pump

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