Title:
AUTOMOBILE BRAKE SYSTEM
Document Type and Number:
Japanese Patent JPS61157458
Kind Code:
A
Abstract:
PURPOSE:To surely operate a brake even upon occurrence of a trouble, by connecting a pressure source to a pressure chamber in a booster through a dual system hydraulic circuit, and by exclusively selecting the communication or isolation of several systems upon normal operation of a computer or upon abnormal operation of the computer. CONSTITUTION:A reservoir chamber 24 in a brake force transmission cylinder 8 is connected to an accumulator 28 and a hydraulic pump 29 through a hydraulic circuit 31 having a control valve 27. Further, the accumulator 28 is connected to a reservoir chamber in a depressing force cylinder 10 through a hydraulic circuit 57 while the reservoir chamber is connected to a pressure regulating chamber (which is not shown) through a depressing force change-over valve. Further, this pressure regulating chamber is connected to the reservoir chamber 24 through a hydraulic circuit 63 having a change-over valve 62. These valves 27, 62 are controlled by a computer 7. Normally, the valve 27 is opened but the valve 62 is closed, and therefore, the pressure is fed from the circuit 31. When the computer 7 is abnormal, the valves 27, 62 are changed over so that the pressure is fed from the circuit 63.
Inventors:
SHIMIZU HIDETOSHI
OKA HIROYUKI
OKA HIROYUKI
Application Number:
JP27427684A
Publication Date:
July 17, 1986
Filing Date:
December 28, 1984
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B60T8/18; B60T8/1761; B60T8/1766; B60T8/88; B60T8/92; (IPC1-7): B60T8/18; B60T8/32
Domestic Patent References:
| JPS59128038A | 1984-07-24 |
Attorney, Agent or Firm:
Tomita Koharu