Vehicle pavement identification system and suspension mode switching method

Abstract

The invention relates to a vehicle pavement identification system and a suspension mode switching method and belongs to the field of automobile safety and comfort. A suspension mainly comprises sprung mass, an elastic element, a damper, a linear motor, unsprung mass, an acceleration sensor A, an acceleration sensor B, a displacement sensor A, a displacement sensor B, a current amplifier, an A/D converter, a signal storage unit, an ECU, a power amplifier and a D/A converter. The ECU (14) comprises a signal processing module, an analysis module, a judgment module and a control module, receives displacement signals and acceleration signals, measured by the vehicle sensors, of the sprung mass and the unsprung mass, grades road conditions by combining the vehicle speed and the damping coefficient and meanwhile controls the suspension by combining vehicle working conditions and switching different modes to meet the requirements of safety and comfort. According to the vehicle pavement identification system and the suspension mode switching method, the linear motor is adopted as an actuator, brake energy of the suspension can be recovered under good road conditions for supplying to other systems for using, and energy feedback performance is achieved.

Description

technical field [0001] The invention belongs to the field of automobile safety and comfort, and in particular relates to a hybrid automobile-based road surface recognition system and a suspension mode switching method. Background technique [0002] With the continuous development of automobile technology, consumers have higher and higher requirements for automobile safety and comfort. During the use of the car, the load, speed, road conditions and other driving conditions will change greatly. Different working conditions have different requirements for ride comfort and handling stability, and the suspension characteristics will also change accordingly. For example, ride comfort generally requires the suspension to be relatively soft, while driving safety requires the suspension to be relatively hard during sharp turns, emergency braking and acceleration, and high-speed driving maneuvers to maintain the body posture and ground contact of the tires. Passive suspension is diff...

AI Technical Summary

Problems solved by technology

However, most of them only divide the road surface grades by monitoring the dynamic parameters of vehicles, and do not take corresponding control methods according to specific road conditions.

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