ACTUATOR IN VEHICLE ANTISKID DEVICE

Japanese Patent JPS6181854

A

PURPOSE:To eliminate power loss of a hydraulic pump, by providing such an arrangement that a pressure boost piston normally actuated under control pressure is actuated by the hydraulic pressure in a hydraulic pressure chamber connected to the discharge port of the hydraulic pump through a check valve, and the hydraulic pressure is relieved into a reservoir when the hydraulic pressure exceeds the braking pressure. CONSTITUTION:The discharge port of a pump 52 is connected through a check valve 54 to a power hydraulic chamber 55e in a regulator valve 55. The liquid pressure in the chamber 55e acts upon a small diameter pressure boost piton 55a while the hydraulic pressure in a master cylinder 12 acts upon a large diameter pressure boost piston 55b. A chamber 55g defined between both pressure boost pistons 55a, 55b and communicated with a reservoir 51 may be communicated with the power hydraulic pressure chamber 55e through a discharge valve 55d. Accordingly, upon operation of the master cylinder 12 a power hydraulic pressure is generated in the chamber 55e due to the operation of the pressure boost pistons 55a, 55b. With this generated hydraulic pressure a control piston 57f and an operating piston 58g are actuated.

JPS61108044	ANTISKID CONTROLLER
JPH02193751	SLIP CONTROL DEVICE FOR VEHICLE

ANDO MASAKI
TAKEUCHI HIROAKI
YAMADA TOYOHISA
YAMANAKA TOSHIHIKO

JP20479084A

April 25, 1986

September 29, 1984

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AISIN SEIKI
TOYOTA MOTOR CORP

B60T8/1761; B60T8/36; B60T8/40; B60T8/42; (IPC1-7): B60T8/40

Teruichi Hase

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