US 12,280,751 B2
Electronic brake system and operation method therefor
Dongyo Ryu, Gyeonggi-do (KR); and Chungjae Lee, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Appl. No. 17/771,443
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
PCT Filed Oct. 23, 2020, PCT No. PCT/KR2020/014556
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/080366, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 10-2019-0132295 (KR), filed on Oct. 23, 2019; and application No. 10-2019-0132305 (KR), filed on Oct. 23, 2019.
Prior Publication US 2022/0396250 A1, Dec. 15, 2022
Int. Cl. B60T 8/34 (2006.01); B60T 8/32 (2006.01); B60T 8/40 (2006.01); B60T 13/14 (2006.01); B60T 13/58 (2006.01); B60T 13/68 (2006.01)
CPC B60T 13/686 (2013.01) [B60T 8/326 (2013.01); B60T 8/4081 (2013.01); B60T 13/142 (2013.01); B60T 13/58 (2013.01); B60T 2270/402 (2013.01); B60T 2270/404 (2013.01); B60T 2270/82 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An operation method of electronic brake system which includes a reservoir in which a pressurized medium is stored, a master cylinder comprising a master piston connected to a brake pedal and a master chamber provided to have a volume variable by displacement of the master piston, a hydraulic pressure supply device provided to generate a hydraulic pressure by operating a hydraulic piston in response to an electrical signal output in response to the displacement of the brake pedal, a dump controller comprising a dump flow path connecting the hydraulic pressure supply device and the reservoir, and a dump valve provided on the dump flow path to control a flow of the pressurized medium, a hydraulic control unit comprising a plurality of flow paths and valves to control the hydraulic pressure provided from the hydraulic pressure supply device, a hydraulic circuit comprising a plurality of inlet valves provided to respectively control the flow of the pressurized medium to be introduced into a plurality of wheel cylinders, and a plurality of outlet valves provided to control the flow of the pressurized medium to be directly discharged from the plurality of wheel cylinders to the reservoir, a backup flow path connecting the master chamber and the hydraulic circuit and provided with a cut valve to control the flow of the pressurized medium, a reservoir flow path connecting the master chamber and the reservoir and an inspection valve provided on the reservoir flow path to control the flow of the pressurized medium, the operation method comprising:
closing the cut valve, the outlet valves, and the dump valve;
forming a hydraulic pressure of the pressurized medium by moving the hydraulic piston forward or rearward;
supplying the pressurized medium in which the hydraulic pressure formed to the dump controller, the backup flow path, and the hydraulic circuit; and
discharging the air introduced therein to the reservoir by opening at least one of the cut valve, the outlet valves, and the dump valve and transferring the pressurized medium in which the hydraulic pressure is formed to the reservoir,
wherein the discharging of the air to the reservoir comprises switching the inspection valve from a closed state to an open state together with the cut valve when the cut valve is opened.