Three-stage control valve for electric control vibration absorber

Abstract

The invention provides a three-stage control valve for an electric control vibration absorber . The three-stage control valve is provided with a longitudinal axis and comprises a valve seat, an electromagnet, a cavity, an armature, an inner spring and an outer spring, wherein the valve seat is fixedly arranged in the electric control vibration absorber and is provided with at least one through hole allowing fluid to enter or exit; the electromagnet is fixedly arranged in the electric control vibration absorber, the electromagnet and the valve seat are oppositely arranged in the axial direction, an installation part is arranged on the surface, facing the valve seat, of the electromagnet, and the electromagnet generates corresponding electromagnetic force when electric current is passed through the electromagnet; the cavity is formed between the electromagnet and the valve seat and provides an opening allowing the fluid to enter or exit; the armature is accommodated in the cavity and canaxially move in the cavity, one end of the inner spring is installed to the installation part, the other end of the inner spring is connected to the armature, and a thrust is applied to the armature;and the two ends of the outer spring are installed at the installation part and are pre-compressed to have certain pre-tightening force, and the inner spring is sleeved with the interior of the outerspring. According to the valve, the three-stage control valve is higher in control precision and simple and reliable in structure.

Description

technical field [0001] The invention relates to a three-stage control valve for an electronically controlled shock absorber, and an electronically controlled shock absorber comprising the three-stage control valve. Background technique [0002] With the development of information technology and automobile manufacturing industry, the trend of mechatronics has become increasingly clear. Among them, the suspension is the main assembly that elastically connects the body and the axle (or wheel) on the car. The direct function of the shock absorber of the suspension system is to ease and suppress the vibration and impact caused by the uneven road surface; quickly attenuate the vibration of the body and axle (or wheel) to ensure the ride comfort and stability of the car. Since the shock absorber has a direct impact on alleviating and attenuating the vibration and impact of the vehicle body, a good shock absorber plays an important role in ensuring high-speed, stable, safe and comf...

AI Technical Summary

Problems solved by technology

Ordinary shock absorbers have fixed damping and cannot meet the safety, ride comfort and comfort requirements of the car at the same time under different road conditions. Therefore, some mid-to-high-end models have begun to use adjustable shock absorbers, and high-end models use electronically controlled proportional valves. Some high-end models use stepped electric control valves

[0004] The limitations of existing products are: ordinary shock absorbers have a single damping coefficient and cannot face complex road surfaces; existing electronically controlled proportional valves on the market can adjust the damping coefficient by themselves according to changes in road conditions, but the adjustment range is small; figure 1 As shown in the F-v curve of the shock absorber (the vertical axis represents the damping force, and the horizontal axis represents the speed of the wheel relative to the vehicle body), most of the existing electric control valves with stages are 2×2 stages, the number of optional stages is small, and the adjustment accuracy relatively low

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