Control method for vehicle body height compensation of semi-active suspension

Abstract

The invention discloses a control method for vehicle body height compensation of a semi-active suspension, a vehicle is provided with an electronic stability program controller and a semi-active suspension controller, and wheel speed sensors and air springs are arranged at tires of the vehicle; the adjusting method comprises the steps that S1, a vehicle travels for the first time; S2, the electronic stability program controller judges whether the vehicle is provided with a spare tire; S3, the electronic stability program controller sends a second tire position signal to the semi-active suspension controller; S4, the semi-active suspension controller calculates a first target height according to the rolling radius difference value of the radius of the tire and the radius of the spare tire in the design state; the semi-active suspension controller adjusts the air spring to reach a first target height; and S5, the semi-active suspension controller adjusts the air spring to reach the preset height. The defect that the vehicle body height is reduced due to the small rolling radius of the spare tire is overcome, and the driving safety and comfort are improved.

Description

technical field [0001] The invention relates to the technical field of vehicle body height adjustment, in particular to a control method for vehicle body height compensation of a semi-active suspension. Background technique [0002] During normal driving, the overall height of the vehicle body is in a horizontal state. When there is a problem with the tire and the small spare tire is replaced, the vehicle body height on the side where the small spare tire is replaced will decrease accordingly because the rolling radius of the tire is greater than that of the spare tire. The body will tilt to the side where the small spare tire is replaced, reducing driving safety and comfort, and affecting other driving assistance functions closely related to the height of the body, such as automatic driving functions based on radar and cameras, and DLP based on body height information. Adjust the headlights and AR head-up display functions, etc. Contents of the invention [0003] In view...

AI Technical Summary

Problems solved by technology

[0002] During normal driving, the overall height of the vehicle body is in a horizontal state. When there is a problem with the tire and the small spare tire is replaced, the vehicle body height on the side where the small spare tire is replaced will decrease accordingly because the rolling radius of the tire is greater than that of the spare tire. The body will tilt to the side where the small spare tire is replaced, reducing driving safety and comfort, and affecting other driving assistance functions closely related to the height of the body, such as automatic driving functions based on radar and cameras, and DLP based on body height information. Adjust headlights and AR head-up display functions, etc.

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