Patent ID: 7165818
Filing Date: 2007-01-23
Classification: B60T

Abstract:
1. A vehicle attitude control system of an automotive vehicle comprising: a hydraulic pump and motor assembly comprising at least one hydraulic pump and a motor driving the pump; a hydraulic actuator that regulates fluid pressures in wheel-brake cylinders of road wheels of the vehicle, independently of each other; and a control unit being configured to be electronically connected to at least the motor and the hydraulic actuator, for executing vehicle attitude control by controlling a discharge pressure of the motor-driven pump and by controlling the fluid pressures in the wheel-brake cylinders to respective desired fluid pressures independently of each other; the control unit comprising a processor programmed to: wherein the road-surface μ dependent duty-ratio limiter processing comprises a select-low process by which a lower duty ratio of the selected highest duty ratio and the road-surface μ dependent duty-ratio maximum value is selected as the duty ratio of the drive signal of the motor.