| 摘要 |
PURPOSE:To save consumed power in a device which is provided with an opening and closing valve in a brake liquid pressure delivery passageway, and another opening and closing valve and a reservoir mechanism in a bypass passageway which bypasses the aforesaid passageway, by providing the latter opening and closing valve only, namely, the second one as a solenoid valve. CONSTITUTION:In brake liquid pressure delivery main passageways 3 and 6 between a master cylinder 2 and a brake device 7, there are provided the constantly opened first opening and closing valve 9, a bypass passageway 14 which is communicated with the main passageway 6 at connecting parts of the second opening and closing valve 15 and a pump mechanism 21, and a reservoir mechanism 33 which is disposed in the passageway 14. A piston mechanism 26 which is a drive for opening and closing the first valve is also disposed in the bypass passageway 14, and the reservoir mechanism 33 is made up as the second piston mechanism. Those piston mechanisms 26 and 33 are provided with pistons 28 and 35, respectively, which are subjected to the hydraulic effect of pressure liquid allowed to flow when the second opening and closing valve 15 of a solenoid valve, so as to be moved against springs 29 and 36, respectively. |
