US 12,459,475 B2
Electronic brake system
Jin Seok Kim, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Appl. No. 17/438,337
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
PCT Filed Mar. 11, 2020, PCT No. PCT/KR2020/003362
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/184967, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10-2019-0027280 (KR), filed on Mar. 11, 2019.
Prior Publication US 2022/0176928 A1, Jun. 9, 2022
Int. Cl. B60T 8/94 (2006.01); B60T 7/04 (2006.01); B60T 8/32 (2006.01); B60T 8/40 (2006.01); B60T 13/14 (2006.01); B60T 13/16 (2006.01); B60T 13/68 (2006.01); B60T 13/74 (2006.01)
CPC B60T 8/94 (2013.01) [B60T 7/042 (2013.01); B60T 8/326 (2013.01); B60T 8/409 (2013.01); B60T 13/142 (2013.01); B60T 13/148 (2013.01); B60T 13/168 (2013.01); B60T 13/686 (2013.01); B60T 13/741 (2013.01); B60T 13/745 (2013.01); B60T 2270/402 (2013.01); B60T 2270/404 (2013.01); B60T 2270/82 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electronic brake system, comprising:
a reservoir configured to store a pressing medium;
a master cylinder connected to a brake pedal;
a pedal simulator connected to the master cylinder;
a hydraulic pressure supply device configured to generate hydraulic pressure by operating a hydraulic piston by an electrical signal output corresponding to a displacement of the brake pedal;
a hydraulic control unit comprising a first hydraulic circuit and a second hydraulic circuit, and configured to control hydraulic pressure transmitted to the first hydraulic circuit and the second hydraulic circuit, the first hydraulic circuit including a first wheel cylinder and a second wheel cylinder, the second hydraulic circuit including a third wheel cylinder and a fourth wheel cylinder;
a hydraulic auxiliary device provided in the second hydraulic circuit and configured to supply hydraulic pressure to the third wheel cylinder and the fourth wheel cylinder when the hydraulic pressure supply device is inoperable; and
a pair of actuators provided on a caliper of the first wheel cylinder and the second wheel cylinder, respectively, and configured to perform braking of each of the first wheel cylinder and the second wheel cylinder when the hydraulic pressure supply device is inoperable,
wherein the hydraulic auxiliary device comprises a pair of pumps configured to pressurize a pressing medium, a motor configured to drive the pair of pumps, a first auxiliary hydraulic passage configured to transmit a pressing medium pressurized by one of the pair of pumps to the third wheel cylinder, and a second auxiliary hydraulic passage configured to transmit a pressing medium pressurized by another of the pair of pumps to the fourth wheel cylinder,
wherein the first auxiliary hydraulic passage and the second auxiliary hydraulic passage are configured to communicate with each other by having a passage connecting a first node between the one of the pair of pumps and the third wheel cylinder and a second node between the another of the pair of pumps and the fourth wheel cylinder without any valve between the first node and second node.