US 11,738,726 B2
Vehicle brake system
Hiromasa Satoh, Nagano (JP); Toshihiro Obika, Yokohama (JP); Yusuke Koga, Yokohama (JP); Yasushi Aoki, Yokohama (JP); Hiromitsu Toyota, Tokyo (JP); Haruo Kotera, Tokyo (JP); Tatsuya Yamasaki, Iwata (JP); and Yui Masuda, Iwata (JP)
Assigned to MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, Tokyo (JP); NTN CORPORATION, Osaka (JP); and HITACHI ASTEMO UEDA CO., LTD., Nagano (JP)
Appl. No. 16/499,146
Filed by NISSIN KOGYO CO., LTD., Tomi (JP); VEONEER NISSIN BRAKE SYSTEMS JAPAN CO., LTD., Yokohama (JP); MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, Tokyo (JP); and NTN CORPORATION, Osaka (JP)
PCT Filed Mar. 29, 2018, PCT No. PCT/JP2018/013435
§ 371(c)(1), (2) Date Sep. 27, 2019,
PCT Pub. No. WO2018/181807, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 2017-071349 (JP), filed on Mar. 31, 2017.
Prior Publication US 2020/0039485 A1, Feb. 6, 2020
Int. Cl. B60T 8/17 (2006.01); B60T 13/74 (2006.01); B60T 17/22 (2006.01)
CPC B60T 8/17 (2013.01) [B60T 13/74 (2013.01); B60T 17/221 (2013.01); B60T 2270/402 (2013.01); B60T 2270/413 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A vehicle brake system comprising:
an electric brake including at least one unit of an electric actuator that presses a friction pad toward a rotor side;
a first stroke sensor that independently detects an operation amount of a brake pedal;
a second stroke sensor that independently detects the operation amount of the brake pedal;
a third stroke sensor that independently detects the operation amount of the brake pedal;
a driver that drives the electric actuator; and
a control device,
the control device including at least three controllers including a first controller that receives the operation amount detected by the first stroke sensor, a second controller that receives the operation amount detected by the second stroke sensor, and a third controller that receives the operation amount detected by the third stroke sensor, connected to one another,
each of the first, second, and third controllers including a driver control unit that controls the driver, and a braking force calculation unit that calculates braking force of the electric brake,
at least one of the first, second, and third controllers further including a determination unit that compares braking force calculation results of the first, second, and third controllers to determine whether the first, second, and third controllers are normal or not, and
the determination unit including an output block section that blocks, when the determination unit determines that any one of the first, second, and third controllers is not normal, an output of the one of the first, second, and third controllers that is determined to be not normal, and
the control device further including a slave controller having only another driver control unit that controls the driver based on braking force calculation results of at least one of the first, second, and third controllers.