Method and system for active aligning of a vehicle

Abstract

The invention discloses a vehicle active return method and system. The method comprises the steps that the vehicle load, the vehicle front tire pressure, the vehicle speed and the steering wheel parameter are obtained, the target self-adapting parameter is determined on the basis of the vehicle load and the vehicle front tire pressure, when it is determined that a vehicle is in a non-active returnstate, by judging whether variable corresponding to the steering wheel parameter and the target self-adapting parameter meets the preset condition or not, whether the vehicle is controlled to enter the active return state or not is determined, and thus after the vehicle enters the active return state, return torque is controlled for the vehicle. As the target self-adapting parameter is related tothe vehicle load and the vehicle front tire pressure, based on the vehicle load and the vehicle front tire pressure, control over self-adapting active return of the vehicle is achieved, the problem that return performance of the same vehicle is not consistent under different use working conditions is avoided, and thus driving safety and driving experience of the vehicle are improved.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, and more specifically, to a method and system for actively aligning a vehicle. Background technique [0002] The existing vehicle active centering method is generally calculated by the controller using the steering wheel torque, steering wheel angle and vehicle speed to obtain the active centering torque, and then the controller outputs the corresponding active centering torque to the booster motor to realize the active centering of the vehicle . [0003] Since each model has different characteristics of the righting torque, a set of corresponding algorithm parameters will be configured for each model during the calibration phase. However, the tire pressure and vehicle load of the same vehicle will change greatly during use, and the tire pressure and vehicle load will significantly affect the characteristics of the vehicle's aligning torque, resulting in changes in the aligning pe...

AI Technical Summary

Problems solved by technology

However, the tire pressure and vehicle load of the same vehicle will change greatly during use, and the tire pressure and vehicle load will significantly affect the characteristics of the vehicle's aligning torque, resulting in changes in the aligning performance

If the normalization torque characteristic is calibrated with a light vehicle load or a high tire pressure as the standard, in the use of a vehicle with a heavy vehicle load or a low tire pressure, there will be a situation of excessive normalization, which will cause the vehicle to be unstable. Seriously affect driving safety

If the calibration is carried out with a heavy vehicle load or a lower tire pressure as the standard, in the use of a lighter vehicle load or a higher tire pressure vehicle, there will be insufficient correction, thereby reducing the driver experience

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