Semi-active shock absorber

Abstract

The invention discloses a semi-active shock absorber. The semi-active shock absorber comprises an oil cylinder assembly, a connecting rod piston assembly, a bottom valve assembly and a digital proportional valve, wherein a main valve assembly is provided with a first oil way and a second oil way; the oil inlet end of the first oil way and the oil inlet end of the second oil way communicate with amiddle cavity; the oil outlet end of the first oil way and the oil outlet end of the second oil way communicate with an oil storage cavity; when a coil assembly is not powered on, the first oil way isin a connected state, the second oil way is in a disconnected state, and the middle cavity communicates with the oil storage cavity through the first oil way; and when the coil assembly is powered on, an armature push rod assembly blocks the first oil way, the first oil way is in a disconnected state, and the middle cavity communicates with the oil storage cavity through the second oil way. The digital proportional valve is adopted for adjusting and controlling the throttling area of shock absorber oil liquid, and the damping force of the shock absorber is adjusted; and by controlling the duty ratio of input signals, the throttling area of the proportional valve can be continuously and freely adjusted, and the damping force of the shock absorber is continuously adjusted and controlled.

Description

technical field [0001] The invention relates to the technical field of shock absorbers, in particular to a semi-active shock absorber. Background technique [0002] The requirements of car ride comfort / ride comfort and handling stability on suspension shock absorber characteristics vary with specific driving conditions such as road surface, load, vehicle speed and vehicle motion state, and also vary with drivers. The ideal shock absorber characteristics should be able to adapt to the above-mentioned different driving conditions and the driver's requirements. However, the most commonly used suspension shock absorbers so far are traditional passive shock absorbers, and their damping characteristics cannot be adjusted. A compromise between handling and comfort; the damping force of the traditional semi-active shock absorber controlled by a proportional valve can be automatically adjusted according to the road conditions, but the proportional solenoid used in the proportional va...

AI Technical Summary

Problems solved by technology

The ideal shock absorber characteristics should be able to adapt to the above-mentioned different driving conditions and the driver's requirements. However, the most commonly used suspension shock absorbers so far are traditional passive shock absorbers, and their damping characteristics cannot be adjusted. A compromise between handling and comfort; the damping force of the traditional semi-active shock absorber controlled by a proportional valve can be automatically adjusted according to the road conditions, but the proportional solenoid used in the proportional valve of this shock absorber High machining accuracy is required, and the controller used is complex in structure, and its related technology is monopolized by foreign countries, which brings great difficulties to the localization of the semi-active shock absorber controlled by the proportional valve.

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