Patent ID: 8888197

Claim:
A brake system comprising: a plurality of hydraulic brakes provided for respective wheels of a vehicle, and configured to be activated by hydraulic pressures of respective brake cylinders thereof so as to restrain rotations of the respective wheels; a manual hydraulic pressure source which is configured to generate hydraulic pressure by operation of a brake operating member by an operator; a power hydraulic pressure source which is configured to generate hydraulic pressure by supply of electric energy thereto; a high pressure generator which is configured to generate hydraulic pressure that is higher than the hydraulic pressure of said manual hydraulic pressure source, by utilizing the hydraulic pressure of said power hydraulic pressure source; a common passage to which a first brake cylinder, a second brake cylinder and said high pressure generator are connected, said first brake cylinder being one of said brake cylinders of said hydraulic brakes and being connected to said common passage via a first individual passage, said second brake cylinder being one of said brake cylinders that is other than said first brake cylinder and being connected to said common passage via a second individual passage that is other than said first individual passage; a high-pressure-generator cut-off valve disposed between said common passage and said high pressure generator; a first manual-pressure-source passage connecting said first individual passage and said manual hydraulic pressure source; a first manual-pressure-source cut-off valve provided in said first manual-pressure-source passage; a first valve provided in a portion of a pressure supply passage which is located between a connected portion of said pressure supply passage and said second brake cylinder, said pressure supply passage including said first individual passage, second individual passage and common passage, said pressure supply passage being connected at said connected portion thereof to said first manual-pressure-source passage; and a pressure-supply control device configured to control supply of the hydraulic pressure to each of said first and second brake cylinders, by controlling at least said high-pressure-generator cut-off valve, first valve and first manual-pressure-source cut-off valve.