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 that the revolution speed and the vibration period of an engine are calculated according to a signal of a crankshaft sensor when the automobile is under a cold-start condition, the vibration state of the engine is calculated according to the revolutionspeed and the vibration period of the engine and the motion position of a piston in the engine, and then the target current value is calculated; according to the current temperature of the engine, the target current value is corrected so as to obtain a first corrected current value; according to a signal waveform output by a camshaft sensor, the cylinder explosion moment of the engine is calculated so as to obtain the delay time; the first corrected current value is applied to an actuator when the delay time arrives, and vibration reduction control over the automobile is conducted. Therefore,active vibration reduction control over the automobile under the cold-start condition is achieved, the method is high in timeliness, and moreover, the significant moment for vibration and noise reduction control is prejudged by using the signal of the camshaft sensor, so that 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...

AI Technical Summary

Problems solved by technology

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 comfort of the ride.

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