Two-manner switchable active control suspension

Abstract

The invention discloses a two-manner switchable active control suspension. The two manners include the first manner, namely, an active suspension manner in which suspension actuator hydraulic cylinders are independently controlled, and the second manner, namely, an active interconnected suspension manner in which a left hydraulic cylinder and a right hydraulic cylinder are controlled in a diagonal interconnected manner. Diagonal connection oil ways of coaxial actuator hydraulic cylinder cavities can be controlled to be opened and closed through a manner switching valve. The two-manner switchable active control suspension can be switched between the first manner and the second manner. When the lateral acceleration borne by an automobile is lower than a threshold value, the manner switching valve is closed, the oil ways through which the cavities of the left hydraulic cylinder and the right hydraulic cylinder are connected in the diagonal manner are cut off, electronic control hydraulic servo valves independently work at the same time and independently control operation force output, and the two-manner switchable active control suspension enters the active suspension control manner so that comfort can be improved; when the lateral acceleration reaches the threshold value, the manner switching valve is opened, the upper cavities and the lower cavities of the left hydraulic cylinder and the right hydraulic cylinder are interconnected in a crossed manner, and the two-manner switchable active control suspension enters the active interconnected suspension manner. The coaxial suspension can work through the electronic control hydraulic servo valve on only one side, and therefore the anti-roll performance is improved.

Description

technical field [0001] The invention relates to the field of active control suspension of automobiles, in particular, it has a dual-mode control system of active suspension control mainly based on ride comfort control and active interconnected suspension control mainly based on body anti-roll control, which can be used according to working conditions. Switches between two active control modes. Background technique [0002] First, there is often a contradiction between the comfort and handling stability of the suspension system. The softer suspension can reduce the acceleration of the vehicle body and improve the comfort, but the high comfort designed by this is at the expense of the suspension working space. The increased deflection of the frame increases the probability of hitting the rubber limit block; when turning, the softer suspension makes the body attitude change greatly, and the roll angle is too large, which is not good for the handling stability. On the contrary,...

AI Technical Summary

Problems solved by technology

The active interconnected suspension described in mode 2, this mode aims at the control of the body roll angle, and can utilize the large roll stiffness of the passive interconnected suspension, which is beneficial to reduce control energy consumption. The active control in this mode can achieve the stability of the body roll angle To any desired angle, control the body roll movement, but it is still insufficient. In this mode, the ride comfort of the vehicle is almost the same as that of the passive suspension, and the comfort is not as good as that of the active suspension described in mode 1.

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