Patent ID: 7315773
Filing Date: 2008-01-01
Classification: B60W,B62D

Abstract:
1. A vehicle motion control method for executing steering control or drive power control for the vehicle based on steering characteristic of the vehicle obtained based on the behavior amount of the vehicle which occurs around an axis in the vertical direction with respect to the vehicle body, comprising: behavior amount acquiring step of acquiring the behavior amount of said vehicle; differentiation step of obtaining a behavior amount differentiated value by differentiating said behavior amount; and steering characteristic determination step of determining said vehicle steering characteristic based on said behavior amount differentiated value, wherein said steering characteristic determination step contains over-steer characteristic determination step in which even if said behavior amount falls under the under-steer characteristic, if it exceeds a predetermined under-steer determination value in the vicinity of neutral steer determination value while said behavior amount differentiated value is positive, it is determined that the steering characteristic is over-steer; and under-steer characteristic determination step in which even if said behavior amount falls under the over-steer characteristic, if it is below a predetermined over-steer determination value in the vicinity of neutral steer determination value while said behavior amount differentiated value is negative, it is determined that the steering characteristic is under-steer.