Braking control apparatus for vehicle

摘要

Based on a difference between target and actual values of a friction member force pressing a brake disc, feedback control over the pressing force is executed. As the actual value, a “limit pressing force (Fbs) obtained by placing a limitation on a temporal change amount of the Fba based on a limit value (Lmt)” is used. The limit value (Lmt) is set based on an electric motor speed (dMkt, dMka), a wheel speed (Vwa), and a temporal change amount (ΔTmp) of the friction member temperature. The Lmt is set to increase as the dMkt (dMka) increases and the temporal change amount (ΔTmp) of the temperature increases, and to also increase as the wheel speed (Vwa) decreases. Thus, even when a rotating member (brake disc) is deformed, braking torque control can be appropriately executed without accelerating a fluctuation of a braking torque on the wheel.

主权项

1. A vehicle brake control device, comprising:
operation amount acquisition means for acquiring an operation amount of a braking operation member for a vehicle by a driver; braking means for pressing a friction member against a rotating member fixed to a wheel of the vehicle through intermediation of an electric motor to generate a braking torque for the wheel; a force sensor which detects an actual pressing force with which the friction member actually presses the rotating member; and control means for calculating a target energization amount based on the acquired operation amount and the detected actual pressing force and controlling the electric motor based on the target energization amount, wherein the control means is configured to:
calculate a target pressing force based on the acquired operation amount;calculate a limit value for suppressing a fluctuation of the actual pressing force based on an operation speed correlation value correlated with a temporal change amount of the acquired operation amount;calculate a limit pressing force obtained by placing a limitation on a temporal change amount of the detected actual pressing force based on the limit value; andcalculate the target energization amount based on a deviation between the target pressing force and the limit pressing force.