A variable damping automobile hydraulic shock absorber and its control method

Abstract

The invention discloses a damping-variable automobile hydraulic shock absorber which comprises a working cylinder, a piston rod, a piston, a groove and a spring. Flowing damping liquid is arranged inside the working cylinder, the piston rod is arranged in the working cylinder and can move in the axial direction of the working cylinder, the piston is arranged on the piston rod, a damping channel isformed between the outer circumferential face of the piston and the inner wall face of the working cylinder and is used for circulating damping liquid, the groove is formed in the circumferential direction of the middle portion of the piston, the bottom of the groove is wound with a magnet exciting coil in the circumferential direction, and the spring is arranged outside the working cylinder in asleeving manner. In the vehicle travelling process, the damping of the shock absorber is variable, and the driving comfort and stability are improved. The invention further provides a control methodof the damping-variable automobile hydraulic shock absorber, in the vehicle travelling process, the damping of a damping device can be controlled according to the compression state of the spring of the shock absorber, the driving comfort and stability are improved, the balance coefficient can be regulated and controlled according to the vehicle travelling state and the pavement condition, and thevehicle driving stability and comfort are better achieved.

Description

technical field [0001] The invention relates to the technical field of automobile shock absorption, and more specifically, the invention relates to an automobile hydraulic shock absorber with variable damping and a control method thereof. Background technique [0002] The shock absorber is the main component that generates damping force, and its function is to quickly attenuate the vibration of the car, improve the ride comfort of the car, and enhance the adhesion between the wheel and the ground. In addition, the shock absorber can reduce the dynamic load of the body part and prolong the service life of the car. [0003] The function of the elastic element in the automobile suspension system is to buffer the vibration caused by the uneven road surface when the vehicle is running, reduce the acceleration of the vehicle body and reduce the dynamic load and dynamic stress of the relevant parts. If there were only elastic elements, the car would continue to vibrate after one i...

AI Technical Summary

Problems solved by technology

[0004] Due to the constant damping coefficient of the ordinary damper used in traditional cars, it cannot be changed with the quality of the road on which the car is driving and the load of the car, making the car appear "softer" when the load is too heavy, and "harder" when the load is too small; Or the vehicle appears "softer" when the vibration is large, and "harder" when the vibration is small, which reduces the service life of the parts and reduces the driving comfort and stability.

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