| 摘要 |
PURPOSE: To dispense with a pressure sensor by providing a means to memorize a motor current value corresponding to the maximum computed value of tire torque, and establishing a motor current to follow an initial wheel lock condition to control brake pressure. CONSTITUTION: A piston of an actuator 12 applies brake pressure to a wheel brake 10 when a current is added to a DC torque motor 26. Before this brake pressure is applied, an electronic control device 20 identifies brake pressure corresponding to the maximum tire torque computed with relation to time. As a motor current increases/decreases, a memorized value of the motor current is renewed by an increased computed value of tire torque. Pressure represented by the memorized value provides the maximum possible braking to a road surface at a critical slip value of a wheel when an initial wheel lock condition is detected. Brake pressure can thus be controlled without a pressure sensor. |
