Fail-safe system and brake actuating apparatus for a vehicular brake control apparatus
AssigneesAkebono Brake Industry Co., Ltd., Akebono Research and Development Centre Ltd.
InventorsKatsuya Miyake, Tatsuo Ogawahara, Takashi Kunimi, Tadashi Kobayashi, Masahiro Nezu, Kimio Takahashi, Masatomo Mori, Takashi Kurosawa
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Abstract
A brake control system for a vehicle in which a brake pressure is generated in accordance with a signal from an electronic control unit for applying the brake pressure to vehicle wheels, characterized in that a mechanical brake system is automatically actuated when an unexpected electrical fault has occurred in an electrical brake system.
Claims16
A brake control system for a vehicle, comprising:
- a sensor for producing a first electric signal representing a status of a brake pedal of the vehicle;
- a master cylinder in which a first brake pressure is generated by actuation of the brake pedal;
- electric brake actuating means for generating a second brake pressure in response to a second electric signal;
- electric control means for generating said second electric signal and controlling said brake actuating means in accordance with said first electric signal produced by said sensor;
- and
- valve means communicating with vehicle brakes for operatively changing between a first position and a second position under the control of the electric control means, said valve means assumes said first position during normal conditions so that said second brake pressure generated by said brake actuating means is supplied to the vehicle brakes, and said valve means changes to said second position when an electrical defect has occurred so that communication between said brake actuating means and the vehicle brakes is shut off and said first brake pressure generated in the master cylinder is supplied to the vehicle brakes.
A brake controlling system brake controlling system for a vehicle having wheels to be braked, comprising:
- an electrical control system comprising:
- a sensor for detecting a condition of a brake pedal of the vehicle;
- an electronic control unit for receiving an output signal of said sensor;
- and
- a brake actuating means for generating a first brake pressure in accordance with a drive signal from said electronic control unit,
- a mechanical control system comprising a master cylinder for generating a second brake pressure by depressing a brake pedal of the vehicle, and
- means for selectively communicating said first brake pressure of said brake actuating means and said second brake pressure of said master cylinder to operate vehicle brakes, said selectively communicating means communicating said first brake pressure to the vehicle brakes during a normal condition and said second brake pressure of said master cylinder to the vehicle brakes during an abnormal condition when an electrical defect has occurred in said electrical control system.
Dependencies are inferred from the claim text.