Automobile and its active vibration reduction control method and device

Abstract

The invention discloses an automobile and an active vibration reduction control method and device thereof. The method comprises the following steps of calculating the revolution speed and the vibration period of an engine according to the crankshaft degree of the engine when the automobile is under an idling condition, and calculating the vibration state of the engine according to the revolution speed and the vibration period of the engine and the motion position of a piston in the engine; calculating a target current value according to the vibration state; calculating the cylinder explosion moment of the engine according to a signal waveform output by a camshaft sensor, so that the delay time of the target current value is obtained; applying the target current value to an actuator when the delay time arrives, so that vibration reduction control over the automobile is conducted. Therefore, active vibration reduction control over the automobile under the idling condition is achieved, the method is high in timeliness, moreover, the significant moment for vibration and noise reduction control is prejudged by using the signal of the camshaft sensor, the action time of vibration reduction control is more accurate, and the vibration reduction effect is better.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an active vibration reduction control method for an automobile, an active vibration reduction control device for an automobile and an automobile with the device. Background technique [0002] With the advancement of social technology, people have higher and higher requirements for comfort, and ride comfort has become an important indicator to measure car performance. Among them, the main factor affecting ride comfort is car vibration, which causes car vibration There are many reasons for this, and engine vibration, as one of the main reasons, deserves attention. The engine vibration is mainly caused by the combustion in the engine cylinder and the reciprocating motion of the piston. The vibration is transmitted to the frame through the engine suspension system, and then transmitted to the cab, affecting the ride comfort. [0003] In order to improve ride comfort, it is neces...

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Problems solved by technology

[0006] The inventors have found that the above-mentioned control algorithm calculates the vibration state and target current value of the third cycle based on the vibration state and target current value of the first cycle of engine vibration, so it does not have timeliness and cannot realize real-time adjustment of vibration , and no vibration reduction control algorithm under idling conditions was proposed

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