US 11,993,239 B2
Electric brake, and control device
Daisuke Goto, Atsugi (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Appl. No. 17/276,969
Filed by Hitachi Astemo, Ltd., Ibaraki (JP)
PCT Filed Sep. 17, 2019, PCT No. PCT/JP2019/036305
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/066735, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 2018-180339 (JP), filed on Sep. 26, 2018.
Prior Publication US 2022/0032886 A1, Feb. 3, 2022
Int. Cl. B60T 8/17 (2006.01); B60T 13/74 (2006.01); B60T 17/22 (2006.01); F16D 55/226 (2006.01); F16D 65/18 (2006.01); F16D 65/38 (2006.01); F16D 66/00 (2006.01); F16D 121/24 (2012.01); F16D 125/40 (2012.01); F16D 125/48 (2012.01); F16D 125/50 (2012.01); F16D 127/02 (2012.01)
CPC B60T 8/17 (2013.01) [B60T 13/746 (2013.01); B60T 17/221 (2013.01); F16D 65/18 (2013.01); F16D 66/00 (2013.01); B60T 2201/12 (2013.01); F16D 55/226 (2013.01); F16D 2065/386 (2013.01); F16D 2066/005 (2013.01); F16D 2121/24 (2013.01); F16D 2125/40 (2013.01); F16D 2125/48 (2013.01); F16D 2125/50 (2013.01); F16D 2127/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An electric brake, comprising:
a brake mechanism configured to transmit a thrust force generated through drive of an electric motor to a piston, the piston being configured to move brake pads to be pressed against a disc;
a thrust force detection unit configured to detect the thrust force transmitted to the piston; and
a control device configured to control the drive of the electric motor based on a detection value obtained by the thrust force detection unit,
wherein the control device is configured to set, as a reference point of a piston thrust force, a detection value obtained by the thrust force detection unit when the electric motor is driven to move the piston toward a direction for pressing the disc in a range in which the brake pads are not in contact with the disc.