| 摘要 |
PURPOSE:To prevent early locking of rear wheels by comparing the condition of deceleration between the front and rear wheels and by controlling the rising pressure of brake liquid for rear wheels so that the braking force does not become excessive in proportion to that for front wheels. CONSTITUTION:In this early locking preventive device for rear wheels, in which the liquid pressure generated in the master cylinder is supplied to front-wheel brake devices 4, 4 directly and to rear-wheel brake devices 8, 8 through an opening/closing valve 5, the valve 5 is composed of a solenoid-operated valve 11 and a differential piston 10, which slides when applied with a liquid pressure exceeding a certain set value to be determined according to the relation between the difference in pressure receiving areas and the force of a return spring 13. The solenoid operated piston 11 is equipped with a needle valve part 11a, which blocks the flow line in the differential piston 10 while this piston is moving. This piston 11 shall be displaced by energizing a solenoid 14 for a minute period of time, when the braking force for rear wheels during application of brakes becomes lower than that for front wheels in a certain amount. |
