A variable damping automotive hydraulic shock absorber with height adjustment system

Abstract

The invention provides a variable damping automobile hydraulic buffer provided with a height adjusting system. The hydraulic buffer comprises a buffering system and the height adjusting system. The buffering system comprises a piston rod, a piston head, a spring assembly, an inner barrel, an outer barrel and a variable damping control valve. The height adjusting system comprises an air compressor, an air compressor control unit, a front axle height sensor, a rear axle height sensor, a pressure sensor, a signal control center, an air cylinder head, an air sac and a cylinder barrel. The inner barrel is partitioned into a rod cavity and a rodless cavity by the piston head. The outer barrel is partitioned into an outer barrel oil storage cavity and a floating piston oil storage cavity by an inner barrel lower end cover. Two oil ports of the variable damping control valve communicate with the outer barrel oil storage cavity and the rodless cavity correspondingly. A floating piston separates oil liquid from an air spring chamber. The oil liquid circuits between the rodless cavity and the rod cavity through the variable damping control valve and a series of damping holes, and is matched with the height adjusting system for making corresponding height compensation while the buffer is compressed or stretched. A good buffering effect and riding comfort can be obtained.

Description

technical field [0001] The invention belongs to the research field of automobile shock absorbers, in particular to a variable damping automobile hydraulic shock absorber with a height adjustment system. Background technique [0002] The vehicle suspension and vibration damping control system is the link between the car frame and the axle, and it is the carrier of the body mass and the link of vibration attenuation. If the road surface is uneven when the car is running, the vehicle suspension and shock absorber bear and transmit the load in the vertical direction, limiting the vibration frequency and strength of the body and wheels. [0003] Ideally, it is hoped that the reciprocating motion of the piston rod of the shock absorber can limit the up and down floating of the car body to achieve the effect of smooth running of the car body. However, in fact, when the road conditions are relatively bad or the driving style is special, the floating range of the piston rod is limite...

AI Technical Summary

Problems solved by technology

[0004] So far, the Chinese patent application number CN105196825A proposes a height control system for automotive mechanical air suspension, which mainly includes oil storage tanks and height valves. This patent mainly realizes height control through mechanical linkages. The precision is not high; the Chinese patent application number CN104534007A proposes a height valve built-in spring shock absorber assembly, which mainly includes an air spring and a shock absorber. In this patent, the height valve is built into the air spring to cooperate with the shock absorber control, but Its shock absorber cannot realize variable damping control, and the vibration reduction mode is single

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