A control strategy selection method for active/passive composite hydraulic suspension

Abstract

The invention relates to the field of suspension devices for vehicles, and in particular to a method for selecting an active / passive composite hydraulic suspension controlling strategy. The method isrealized through a suspension device. The suspension device comprises a controller, a hydraulic cylinder, a piston rod telescopically matched with the hydraulic cylinder, a wheel axle arranged at thefree end of the piston rod and wheels arranged at both ends of the wheel axle, wherein a rod chamber and a rodless chamber of the hydraulic cylinder are both filled with hydraulic oil; a communication tube outside the hydraulic cylinder is connected between the rod chamber and the rodless chamber of the hydraulic cylinder; a second solenoid valve and a hydraulic pump are arranged on the communication tube in series; and the rodless chambers of the hydraulic cylinders of a plurality of suspension devices are all connected to a main hydraulic pipe through the first solenoid valve. The method has the advantages that a vehicle is supported by a plurality of suspension devices with consistent structures and can be independently controlled or cooperatively controlled by the suspension devices by means of the switching of the first solenoid valve, thereby improving the running trafficability, the smoothness and the maintainability.

Description

technical field [0001] The invention relates to the field of vehicle suspension devices, in particular to an active / passive composite hydraulic suspension control strategy selection method. Background technique [0002] Vehicle suspension device is the general term for all connecting devices between the wheel and the frame. The existence of the suspension device balances the vehicle vibration caused by uneven road surface, uneven vehicle speed and engine excitation factors, thereby ensuring the service life of the vehicle and the facilities in the vehicle. , as well as human comfort and work efficiency. [0003] The vehicle suspension system is generally divided into non-independent suspension and independent suspension. The wheels on both sides of the non-independent suspension are connected by an integral frame, and the wheels together with the axle are suspended under the frame or the body through an elastic suspension system. It has the advantages of simple structure, e...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the contradictory problem of the necessity of active adjustment of the vehicle suspension device and the dynamic response of complete active control that sometimes cannot keep up with the changes of complex road surfaces, the present invention provides an active / passive active / passive system for intelligently controlling the hydraulic suspension device in combination with the characteristics of fast passive response. Composite control strategy, in which the piston rod is actively controlled to expand and contract to adapt to large-scale uneven road surfaces, and the passive control is quickly responded to adapt to small-scale uneven road surfaces

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