Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Ntn Corporation

Hitachi Astemo Ueda Co., Ltd.

Hitachi Astemo Ltd.

Haruo Kotera

Hiromitsu Toyota

Yui Masuda

Tatsuya Yamasaki

Hiromasa Satoh

Yusuke Koga

Toshihiro Obika

Yasushi Aoki

A vehicle brake system () includes a first control device () and a second control device () that respectively include a master controller (), a first sub-controller (), and a second sub-controller () that are connected to one another. Each of the master controller (), the first sub-controller (), and the second sub-controller () includes a braking force calculation unit that calculates braking force of electric brakes (to), and a determination unit that compares braking force calculation results of the controllers to determine whether itself is normal. The determination unit includes an output block section that blocks, when the determination unit determines that any one of the controllers is not normal, an output of the controller that is determined to be not normal.

Vehicle brake system

A highly reliable vehicle brake system that includes an electric brake and achieves redundancy at low cost is provided. A vehicle brake system () is provided to a wheel (Wa) of a vehicle (VB), and includes an electric brake () provided with a motor (), a driver () that drives the motor (), and a first control device () provided with a master controller () and a first sub-controller () connected to each other. The electric brake () is controllable by both the master controller () and the first sub-controller ().

A highly reliable vehicle brake system including an electric brake is provided. A vehicle brake system () includes electric brakes (to) provided with motors (to), drivers (to) that drive the motors (to), and a control device that controls the drivers (to). The electric brake () includes two motors (and), and the control device includes separate drivers (and) respectively corresponding to the two motors (and). The control device includes a first master controller () and a first sub-controller (). The first master controller () controls the driver () corresponding to the motor (), and the first sub-controller () controls the driver () corresponding to the motor

An electric brake device has at least three control units: a first front wheel control unit for controlling a front-left wheel brake mechanism and a front-right wheel brake mechanism; a second front wheel control unit again for controlling the front-left wheel brake mechanism and the front-right wheel brake mechanism; and a rear wheel control unit for controlling a rear-left wheel brake mechanism and a rear-right wheel brake mechanism. In case of failure of at least one of the three control units, at least one of the non-defective other control units temporarily reduces the braking force of the target brake mechanism.

Electric brake device

An electric brake device has at least three control units: a first diagonal wheel control unit that controls a front-left wheel brake mechanism and a rear-right wheel brake mechanism which are positioned diagonally; a second diagonal wheel control unit that controls a front-right wheel brake mechanism and a rear-left wheel brake mechanism which are positioned diagonally; and a front wheel control unit that controls a front-left wheel brake mechanism and a front-right wheel brake mechanism. Each of the brake mechanisms has a friction-receiving member that rotates together with the wheel; and a friction-applying member that moves while being powered by an electric actuator, and obtains the braking force by pressing the friction-applying member against the friction-receiving member.

Growing community of inventors

Tokyo, Japan

Haruo Kotera