MOVEMENT CONTROLLER OF VEHICLE

Japanese Patent JP3412395

B2

PROBLEM TO BE SOLVED: To improve responsiveness of control start of a vehicle when it runs on a low-μ road and reduce any unnecessary start of control when it runs on a high-μ road by setting a control start threshold value so that it may be made smaller as the road surface frictional coefficient estimated by a road surface frictional coefficient estimation means is lower.
SOLUTION: The maximum value Gyp of a lateral acceleration is found out based upon the information from a lateral acceleration sensor (201) so as to estimate whether present situation is under brake steering control or within t2sec. after the control end (202). Otherwise, it is estimated whether the absolute value of a steering angle δf is less than a present value δk or not (203). If this judgment is correct, a vehicle is considered to make approximately straight running so as to decide a road surface μ as G0 (204). When the absolute value of the front wheel steering angel δf is judged to be larger than the present value δk, the road surface μ is decided to be k.Gyp (205). On the other hand, if the present situation is under brake steering control or within t2sec. after the control end, the road surface road surface μ is determined to be Gyp at the control starting instant (206).

Takayuki Ito
Kenji Totsu
Yasuyuki Yasui
Fukami Masanobu
Norio Yamazaki

JP11490596A

June 03, 2003

May 09, 1996

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Aisin Seiki Co., Ltd.

B60T8/24; B60T8/172; B60T8/1755; B60T8/1763; B60T8/48; B60T8/58; (IPC1-7): B60T8/58

JP7215190A
JP5170087A
JP858554A
JP7315197A
JP3264846A
JP3224860A
JP880826A

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