Toyota Jidosha Kabushiki Kaisha

Koyoyuki Uchida

Tatsuo Sugitani

Hideo Inoue

A method of automatically controlling a braking system for an automotive vehicle, by changing a plurality of control parameters in at least two steps, depending upon a determined one of three or more ranges of a variable in which a detected value of the variable falls. At least one of the control parameters is changed in two steps corresponding to two adjacent ranges of the variable, while at least one of the other control parameter or parameters is kept unchanged for the two adjacent ranges of the variable. The variable may be a deceleration rate of the vehicle, or other variables which are changed with a coefficient of friction between a vehicle wheel and the road surface. The control parameters may include an upper limit of the deceleration rate, and a duration for which the braking pressure is reduced, to prevent locking of the wheel due to excessive braking force applied to the wheel, or prevent an excessive mount of slip of the wheel due to excessive drive torque applied to the drive wheel during start or acceleration of the vehicle.

Growing community of inventors

Susono, Japan

Koyoyuki Uchida