| 摘要 |
PROBLEM TO BE SOLVED: To restrain variation of a rear wheel braking fluid pressure when pressures of two braking fluid pressure systems of a front wheel and a rear wheel are increased by a single pump motor. SOLUTION: When the pressures of the front and rear wheel systems are increased by the single pump motor, a wheel cylinder pressure of the rear wheel reaches a target pressure first. When the wheel cylinder pressure of the rear wheel is under the steady state, a pressure reducing valve of the rear wheel system is throttled, and then a pump for the rear wheel system is driven when a wheel cylinder pressure of the front wheel is under the steady state. At driving of the pump, output of a robust compensator of a wheel cylinder pressure feedback controller is controlled. More concretely, output of a primary low pass filter is prevented to be negative. Thus, the variation of the wheel cylinder pressure of the rear wheel after the wheel cylinder pressure of the front wheel reaches the target pressure is restrained, and the wheel cylinder pressure of the rear wheel can coincide with the target pressure. COPYRIGHT: (C)2004,JPO
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