US 11,932,224 B2
Brake control device and brake system
Kyoshiro Itakura, Tokyo (JP); Toshiyuki Ajima, Tokyo (JP); Takahiro Ito, Tokyo (JP); Kenichiro Matsubara, Hitachinaka (JP); Daisuke Goto, Hitachinaka (JP); and Makoto Matsuura, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/283,914
Filed by HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka (JP)
PCT Filed Aug. 15, 2019, PCT No. PCT/JP2019/032015
§ 371(c)(1), (2) Date Apr. 8, 2021,
PCT Pub. No. WO2020/075386, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 2018-192392 (JP), filed on Oct. 11, 2018.
Prior Publication US 2022/0001845 A1, Jan. 6, 2022
Int. Cl. B60T 8/00 (2006.01); B60T 1/00 (2006.01); B60T 8/172 (2006.01); B60T 13/74 (2006.01); B60T 17/22 (2006.01); F16D 65/14 (2006.01); F16D 65/18 (2006.01); B60T 1/06 (2006.01); F16D 66/00 (2006.01); F16D 121/24 (2012.01)
CPC B60T 8/172 (2013.01) [B60T 13/746 (2013.01); B60T 17/221 (2013.01); F16D 65/183 (2013.01); B60T 1/065 (2013.01); B60T 2201/03 (2013.01); F16D 2066/005 (2013.01); F16D 2121/24 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A brake control device, which is mounted on a brake system at least including a piston that moves in a linear motion direction by rotation of an electric motor, a brake pad that is pressed against a brake disc by the movement of the piston, and a position detection unit that detects a position of the piston, and controls a motion of the piston, comprising
a command calculation unit that calculates an operation command value for making a pressing force by which the brake pad is pressed against the brake disc reach a target thrust value,
wherein the command calculation unit includes:
a clearance command calculation unit that calculates a command value required for contact between the brake pad and the brake disc; and
a thrust command calculation unit that calculates a command value required for reaching a target thrust from a state where the brake pad and the brake disc are in contact with each other, and
the command calculation unit calculates the operation command value by integrating the command value calculated from the clearance command calculation unit and the command value calculated from the thrust command calculation unit when calculating the operation command value from a state where the brake pad and the brake disc are separated from each other.