US 11,951,967 B2
Electronic brake system and operation method thereof
Jin Seok Kim, Suwon (KR); and Seong Ho Choi, Anyang (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek (KR)
Appl. No. 17/614,361
Filed by HL MANDO CORPORATION, Pyeongtaek (KR)
PCT Filed Apr. 29, 2020, PCT No. PCT/KR2020/005803
§ 371(c)(1), (2) Date Nov. 25, 2021,
PCT Pub. No. WO2020/242068, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 10-2019-0064878 (KR), filed on May 31, 2019.
Prior Publication US 2022/0227343 A1, Jul. 21, 2022
Int. Cl. B60T 8/40 (2006.01); B60T 13/14 (2006.01); B60T 13/68 (2006.01)
CPC B60T 8/4086 (2013.01) [B60T 8/409 (2013.01); B60T 13/146 (2013.01); B60T 13/148 (2013.01); B60T 13/686 (2013.01); B60T 2270/404 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electronic brake system comprising:
a reservoir in which a pressurized medium is stored;
an integrated master cylinder comprising a master chamber, a master piston provided in the master chamber to be displaceable by a brake pedal, a first simulation chamber, a first simulation piston provided in the first simulation chamber to be displaceable by a displacement of the master piston or a hydraulic pressure of the pressurized medium accommodated in the master chamber, a second simulation chamber, a second simulation piston provided in the second simulation chamber to be displaceable by a displacement of the first simulation piston or a hydraulic pressure in the first simulation chamber, and an elastic member provided between the first simulation piston and the second simulation piston;
a hydraulic pressure supply device 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 control unit comprising a first hydraulic circuit provided to control the hydraulic pressure transferred to two wheel cylinders and a second hydraulic circuit provided to control the hydraulic pressure transferred to the other two wheel cylinders;
an electronic control unit provided to control valves based on hydraulic pressure information and displacement information of the brake pedal;
a first backup flow path connecting the master chamber and the first hydraulic circuit;
a second backup flow path connecting the first simulation chamber and the second hydraulic circuit;
a first cut valve provided in the first backup flow path to control the flow of the pressurized medium;
at least one second cut valve provided in the second backup flow path to control the flow of the pressurized medium;
an auxiliary backup flow path connecting the second simulation chamber and the second backup flow path; and
an inspection valve provided in the auxiliary backup flow path to control the flow of the pressurized medium.