Automobile stability control method and automobile stability control system

Abstract

An automobile stability control method includes: firstly calculating expect yawing moment MG and the maximum braking pressure Pauf, m of a whole automobile expect corresponding to MG, then selecting a first aim wheel; judging whether the nominal pressure Pslip of the first aim wheel is larger than the maximum braking pressure Pauf, m of the whole automobile expect, distributing the maximum braking pressure Pauf, m of the whole automobile expect to the first aim wheel when Pauf, m is smaller than or equal to Pslip; selecting a wheel on the same side of the first aim wheel as a second aim wheel and distributing the maximum braking pressure Pauf, m of the whole automobile expect to the first aim wheel and the second aim wheel when Pauf, m is larger than Pslip; and finally an operation pressure control mechanism to perform pressurizing control on the distributed aim wheel according to a distribution method. The automobile stability control method can control pressure distribution according to the maximum braking pressure Pauf, m of the whole automobile expect and the nominal pressure of the first aim wheel so as to ensure that the automobile stability control method has better stability and braking performance.

Description

technical field [0001] The invention relates to the field of vehicle stability control, in particular to a vehicle stability control method and system. Background technique [0002] Vehicle stability control system is a vehicle active safety system developed on the basis of automobile anti-lock braking system (ABS) and traction control system (TCS). Traditional vehicle stability control methods are generally based on actual yaw rate, actual center of mass The desired yaw moment is calculated from the sideslip angle with the nominal yaw rate and the nominal center-of-mass sideslip angle, and then individual wheels are selected and braked according to the vehicle state. This strategy can get a better control effect in normal working conditions, but because the traditional stability control method only selects a single wheel as the target wheel for braking, there will be such a situation: when turning on a road with a low adhesion coefficient, especially in the When turning sh...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the traditional vehicle stability control method only selects a single wheel for braking, the stability control effect is not good under low adhesion conditions such as oversteer and understeer, and the technical problem is provided. Better stability control method and system for performance and braking performance

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