US 11,993,232 B2
Electronic brake system and method for operating same
Jin Seok Kim, Gyeonggi-do (KR); and Seong Ho Choi, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-Do (KR)
Appl. No. 17/614,354
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
PCT Filed Apr. 29, 2020, PCT No. PCT/KR2020/005810
§ 371(c)(1), (2) Date Nov. 25, 2021,
PCT Pub. No. WO2020/242070, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 10-2019-0064829 (KR), filed on May 31, 2019.
Prior Publication US 2022/0219664 A1, Jul. 14, 2022
Int. Cl. B60T 13/66 (2006.01); B60T 7/04 (2006.01); B60T 8/40 (2006.01); B60T 13/14 (2006.01); B60T 13/62 (2006.01); B60T 13/68 (2006.01); B60T 17/22 (2006.01)
CPC B60T 13/686 (2013.01) [B60T 7/042 (2013.01); B60T 8/4086 (2013.01); B60T 13/142 (2013.01); B60T 13/62 (2013.01); B60T 17/221 (2013.01); B60T 2270/402 (2013.01); B60T 2270/404 (2013.01); B60T 2270/406 (2013.01); B60T 2270/82 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electronic brake system comprising:
a reservoir in which a pressurized medium is stored;
an integrated master cylinder including a simulation chamber, a simulation piston provided in the simulation chamber to be displaceable by a brake pedal, a master chamber, a master piston provided in the master chamber to be displaceable by a displacement of the simulation piston or a hydraulic pressure of the simulation chamber, an elastic member provided between the simulation piston and the master piston, a piston spring elastically supporting the master piston, a simulation flow path connecting the simulation chamber to the reservoir, and a simulator valve provided in the simulation flow path to control a flow of a pressurized medium;
a hydraulic pressure providing unit provided to generate a hydraulic pressure by operating a hydraulic piston according to an electrical signal output in response to a displacement of the brake pedal;
a hydraulic pressure control unit including a first hydraulic circuit provided to control the hydraulic pressure to be transferred to two wheel cylinders, and a second hydraulic circuit provided to control the hydraulic pressure to be transferred to other two wheel cylinders;
an electronic control unit configured to control valves based on hydraulic pressure information and displacement information of the brake pedal;
a backup flow path connecting the simulation chamber to the first hydraulic circuit;
an auxiliary backup flow path connecting the master chamber to the backup flow path; and
an inspection valve provided in the auxiliary backup flow path to control a flow of the pressurized medium.