Active suspension, system and control method

Abstract

The invention belongs to the field of suspensions, and particularly relates to an active suspension, a system and a control method.The active suspension comprises a buffer rod and a transmission device, one end of the buffer rod is rotationally connected with a frame, the other end of the buffer rod is rotationally connected with an upper cantilever or a lower cantilever, the transmission device drives the buffer rod to rotate, and the vertical shaft diameter of the buffer rod changes at a constant speed during rotation; the two ends of the buffer rod are rotationally connected with the lower cantilever and the frame correspondingly, and the transmission device for driving the buffer rod is matched, so that when the running state of a vehicle changes, the shaft diameter of the buffer rod in the stress direction changes by rotating the buffer rod, and then different elastic feedback forces are provided; and finally, the buffering effect of actively controlling the suspension is achieved, and different running states of the vehicle are adapted. Compared with an existing electromagnetic, hydraulic and air actuator active suspension, the active suspension adopted by the invention is simplified in structure, quick in response, high in reliability, low in energy consumption and low in cost.

Description

technical field [0001] The invention belongs to the field of suspension, and in particular relates to an active suspension, a system and a control method. Background technique [0002] There are two types of suspension in modern cars, one is driven suspension and the other is active suspension. [0003] The driven suspension is the traditional suspension, which is composed of springs, shock absorbers (shock absorbers), guide mechanisms, etc. The impact force attenuates the vibration of the bearing system caused by the impact force. Once the parameters such as stiffness and damping are determined to be fixed, they cannot change in real time as the vehicle's driving conditions change. Taking into account the requirements of ride comfort and handling stability, we can only determine a compromise plan that satisfies the requirements of all aspects as much as possible, which affects the ride comfort and ride comfort of the car to a certain extent. [0004] Active suspension ha...

AI Technical Summary

Problems solved by technology

[0005] Existing active suspensions mainly include active electromagnetic suspensions, active hydraulic suspensions, and active air suspensions. At present, there are still defects such as complex structure, slow response, poor reliability, high energy consumption, and high cost, which is not conducive to popularization in the automotive industry. Therefore, it has become an industry trend to design an active suspension with simple structure, fast response, high reliability, low energy consumption and cost saving

[0006] The application number is "CN201510138277.5", and the Chinese invention patent titled "A Road Adaptive Hydraulic Active Suspension System" proposes a method of adjusting the hydraulic actuator to realize the adjustment of stiffness and damping to achieve road self-adaptation. The components for adjusting the stiffness and damping are not simple in structure, and the cost is relatively high. The introduction of this active suspension system will significantly increase the production cost of the car

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