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 Behavior control system for vehicle

Details
Inventors: Inagaki, Shoji;
Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota, JP)
Primary Examiner: Jeanglaude; Gertrude A.
Assistant Examiner:
Attorney, Agent or Firm: Oliff & Berridge, PLC

In a vehicle behavior control system, a target braking force applied to each wheel of the vehicle is obtained based on a master cylinder pressure so as to be proportional to a vertical load of each wheel. When it is determined that a braking force is applied to the vehicle running on a road with uneven friction coefficient, an excess yaw moment caused by the difference between the target braking force and an actual braking force is calculated. A steering angle is corrected with a correcting steering angle estimated based on the excess yaw moment. A yaw rate difference is calculated as a difference between a normal yaw rate and an actual yaw rate of the vehicle based on the steering angle that has been corrected. It is determined whether the vehicle behavior is deteriorated based on the yaw rate difference. The vehicle behavior is then controlled to reduce the yaw rate difference.

DETAILED DESCRIPTION It is an object of the invention to provide a vehicle behavior control system that executes the vehicle behavior control in consideration with the amount of the correcting operation of the vehicle operator for appropriate vehicle behavior control in accordance with the vehicle operator's correcting operation.
According to the invention, in a vehicle behavior control system, a normal vehicle state value is obtained based on an operation amount of a vehicle operating member performed by a vehicle operator, and a vehicle behavior is controlled based on an actual vehicle state value and the normal vehicle state value.
The vehicle behavior control system estimates an amount of correction with respect to the vehicle operating member by the vehicle operator such that the normal vehicle state value is obtained based on the estimated amount of correction and an actual operation amount.
In another vehicle behavior control system, a normal vehicle state value is obtained based on an operation amount of a vehicle operating member performed by a vehicle operator, and a vehicle behavior is controlled based on an actual vehicle state value and the normal vehicle state value.
The vehicle behavior control system estimates an amount of correction with respect to the vehicle operating member performed by the vehicle operator such that the normal vehicle state value is corrected based on the estimated amount of correction.
In another vehicle behavior control system, a normal vehicle state value is obtained based on an operation amount of a vehicle operating member performed by a vehicle operator, and an actuator of the vehicle is controlled in accordance with a control value for adjusting a vehicle state value into the normal vehicle state value so as to control a vehicle behavior.
The vehicle behavior control system estimates an amount of correction with respect to the vehicle operating member performed by the vehicle operator, based on which the control value is corrected.
In the aforementioned vehicle behavior control system, the estimated amount of correction may be subtracted from the actual operation amount to obtain a corrected operation amount, based on which the normal vehicle state value may be obtained



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