Automatic suspension system, and control system and method of automobile suspension system

Abstract

The invention relates to an automobile suspension system, and a control system and method of the automobile suspension system and belongs to the technical field of automobile suspension. The automobile suspension system comprises a lower swing arm, a shock absorber assembling component, an upper swing arm and a wheel assembling component. According to the automobile suspension system, the equivalent stiffness of suspension springs is adjusted according to signals collected by a sensor, and the manipulation stability and traveling comfort of an automobile are fully combined; the height of an automobile chassis is adjusted appropriately, and the traveling passing ability of the automobile is improved; a rotary type stepping motor of the suspension system further has the effect similar to a force generator in an active suspension system and can provide reacting force counteracting impact of wheels for the suspension system through forward rotation or reverse rotation; and a limiting nut and a piston rod thread constitute a lead screw nut structure, so that the self-locking function is achieved, thus, electric energy is consumed only when the rotary type stepping motor rotate forwardsor reversely, and the energy saving effect of the automobile suspension system is better than that of the active suspension system.

Description

technical field [0001] The invention belongs to the technical field of automobile suspension, and in particular relates to an automobile suspension system, a control system and a control method thereof. Background technique [0002] Automobile suspension is the general term for all force transmission connection devices between the axle (or wheel) and the frame (or load-bearing body), and its function is to transmit the force and torque acting between the wheel and the frame. The system generally includes a shock absorber assembly composed of springs, etc., relying on the spring in the shock absorber to buffer and absorb the impact and vibration transmitted to the frame or body due to uneven roads to ensure the smooth running of the car. Car suspension is an important part to ensure ride comfort, and at the same time, an important part to ensure car driving safety. [0003] At present, in order to ensure the ride comfort and handling stability of automobiles, semi-active ind...

AI Technical Summary

Problems solved by technology

Active suspension has very good dynamic characteristics, but it is rarely used in ordinary passenger cars due to high energy consumption. At the same time, except for active suspension and air suspension, general passive suspension and semi-active suspension are basically not used. It has the ability to raise the chassis height of the car to improve the passability of the car

[0004] In the automobile suspension system of the prior art, the stiffness of the shock absorber assembly is mostly invariable, which brings problems such as poor driving comfort and ride comfort

For this reason, some vehicle suspension systems with variable stiffness have been invented. Among them, some shock absorber components use springs with unequal cross-sections and different gyration radii, and some of them realize variable stiffness through electromagnetic feedback, which is insufficient. The problem is that it is difficult to make, and the places with low rigidity and high rigidity are prone to fatigue and fracture, or the structure is complicated, and the cost of installation, manufacture, repair and maintenance is high, etc., which need to be improved

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