Air suspension height control system and control method

Abstract

The invention discloses an air suspension height control system and control method. A detection unit of the system is used for detecting current pressure and current height of an air spring, recordingcurrent pressure data and outputting current height data, the current height and first preset height are compared by a control unit, a height adjustment command is outputted if a difference value between the current height and the first preset height exceeds preset height difference range, acquired adjusted height and second preset height are compared by a height adjusting unit, the height of theair spring is increased, the pressure data of the air spring is recorded after the height is increased if the adjusted height is higher than the second preset height, the height of the air spring isreduced, and the pressure data of the air spring is recorded after the height is reduced if the adjusted height is lower than the second preset height. The system can monitor suspension height in realtime and timely adjust the height, so that the air spring can consistently keep roughly constant height range, and the roughly constant height of a vehicle is ensured.

Description

Technical field [0001] The present invention relates to the technical field of vehicle engineering, and in particular to a height control system and control method for a vehicle air suspension. Background technique [0002] Suspension is the general term for the force transmission connecting device between the frame (or load-bearing body) of the car and the axle (or wheel). Its function is to transmit the force and torque between the wheel and the frame, and buffer The impact force transmitted from the uneven road to the frame or body, and reduce the resulting vibration, to ensure the smooth driving of the car. However, the load change of a motor vehicle between no load and full load will cause the suspension height to change. The suspension will change the height of the vehicle from the ground due to the different load, which affects the vehicle's passing distance and safety and comfort. In addition, during the running of the vehicle, the suspension displacement and the load ac...

AI Technical Summary

Problems solved by technology

However, the load change of the motor vehicle between no-load and full-load will cause the suspension height to change, and the suspension will cause the vehicle's ground clearance to change continuously due to the different load, which will affect the vehicle's passing distance and safety and comfort

Moreover, during the driving process of the vehicle, the suspension displacement and the load acting on the vehicle are independent parameters, and the overall load evaluation and load transfer evaluation lack data support, which is not conducive to the establishment of the vehicle load monitoring sequence

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