| 摘要 |
An electronically controlled hydraulic brake system comprising: a brake operating member; a reservoir containing a brake fluid; a front and a rear wheel cylinder; a front and a rear pressure-increase valve; a front and a rear pressure-decrease valve; a power-operated pressure source; a front and a pressure-decrease passage respectively connecting the front and rear pressure-decrease valves with the reservoir; an operating state detecting device detecting an operating state of the brake operating member, based on which the brake fluid is (i) supplied to the front and rear wheel cylinders from the power-operated pressure source by operation of the front and rear pressure-increase valves, so as to increase pressure in the front and rear wheel cylinders, and (ii) discharged from the front and rear wheel cylinders to the reservoir via the front and rear pressure-decrease passages, by operation of the front and rear pressure-decrease valves so as to decrease the pressure in the front and rear wheel cylinders; and pulse transmission restraining means restraining transmission of a pressure pulse from the brake fluid at a junction between the front and rear pressure-decrease passages to the brake fluid in the rear pressure-decrease passage.
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