IP Library › Granted Patent US 12,280,752
Granted Patent B2
US 12,280,752 · App. 18/619,203 · Granted Apr 22, 2025

Electric brake system

Inventor: Jin Seok Lee (Seoul, KR)
Assignee: HL MANDO CORPORATION
B60T13/686B60T7/042B60T2220/04B60T2270/82
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Quick Facts
Patent No.
US 12,280,752
App. No.
18/619,203
Granted
Apr 22, 2025
Kind
B2
Abstract

Disclosed is an electronic brake system that includes a master cylinder unit including a master cylinder to which a master cylinder reservoir coupled to generate a hydraulic pressure, a hydraulic block provided with a hydraulic pressure supply device to generate the hydraulic pressure by an electrical signal outputted in response to a displacement of a brake pedal and a hydraulic control unit to transmit the hydraulic pressure discharged from the hydraulic pressure supply device to wheel cylinders provided in each wheel, and disposed to be separated from the master cylinder unit, a hydraulic block reservoir coupled to the hydraulic block, and a connection hose to connect the master cylinder reservoir and the hydraulic block reservoir.

Claims (57)

1. An electronic brake system comprising:

a master cylinder unit including a master cylinder to generate a hydraulic pressure and a master cylinder reservoir coupled to the master cylinder to store oil;

a hydraulic block provided with a hydraulic pressure supply device to generate the hydraulic pressure by a hydraulic piston actuated by an electrical signal outputted in response to a displacement of a brake pedal, and a hydraulic control unit to transmit the hydraulic pressure to wheel cylinders provided in each wheel, and disposed to be separated from the master cylinder unit;

a hydraulic block reservoir to supply oil to the hydraulic block side or store discharged oil, and

a connection hose to connect the master cylinder reservoir and the hydraulic block reservoir;

wherein:

the hydraulic pressure supply device includes a cylinder block in which the hydraulic piston is accommodated, a first pressure chamber provided at one side of the hydraulic piston in the cylinder block to be connected to the wheel cylinder, and a second pressure chamber provided at the other side of the hydraulic piston in the cylinder block to be connected to the wheel cylinder;

the hydraulic block reservoir includes a plurality of hydraulic block reservoir chambers divided by partitions.

2. The electronic brake system according to claim 1 , wherein

one of the plurality of hydraulic block reservoir chambers is connected to a first hydraulic circuit of the hydraulic control unit, another is connected to a second hydraulic circuit of the hydraulic control unit.

3. The electronic brake system according to claim 2 , wherein

another one of the plurality of hydraulic block reservoir chambers is connected to at least one of the first pressure chamber and the second pressure chamber.

4. The electronic brake system according to claim 2 , wherein

the hydraulic block includes a first hydraulic block reservoir flow passage connected to one of the plurality of hydraulic block reservoir chambers and the first hydraulic circuit, and a second hydraulic block reservoir flow passage connected to another one of the plurality of hydraulic block reservoir chambers and the second hydraulic circuit.

5. The electronic brake system according to claim 4 , wherein

the first hydraulic block reservoir flow passage is connected to a simulator chamber of a simulator device configured to provide a reaction force.

6. The electronic brake system according to claim 1 , wherein

the master cylinder reservoir includes a plurality of reservoir chambers divided by partitions,

one of the plurality of reservoir chambers is connected to a first master chamber of the master cylinder, another is connected to a second master chamber of the master cylinder.

7. The electronic brake system according to claim 6 , wherein

another one of the plurality of reservoir chambers is connected to the hydraulic block reservoir.

8. The electronic brake system according to claim 6 , wherein

the hydraulic block includes an inspection flow passage inlet port connected to a reservoir chambers of the master cylinder reservoir, an inspection flow passage outlet port connected to the first master chamber of the master cylinder.

9. The electronic brake system according to claim 8 , wherein

the hydraulic block includes an inspection flow passage connecting the inspection flow passage inlet port and the inspection flow passage outlet port, and an inspection valve provided on the inspection flow passage.

10. The electronic brake system according to claim 9 , wherein

the hydraulic block includes an inspection flow passage check valve provided on a bypass inspection flow passage connected to the inspection flow passage in the front and rear of the inspection valve and to allow the flow of oil only to the inspection flow passage outlet port.

11. The electronic brake system according to claim 1 , wherein

the hydraulic block includes hydraulic flow passages to supply the hydraulic pressure supplied from the hydraulic pressure supply device to the hydraulic pressure control unit, backup flow passage connection ports connected to at least one of the master chambers of the master cylinder, and backup flow passages connecting the backup flow passage connection ports and the hydraulic flow passages and provided with cut valves.

12. The electronic brake system according to claim 11 , wherein

the backup flow passages include a first backup flow passage connected to a first hydraulic circuit of the hydraulic control unit and the first master chamber, and a second backup flow passage connected to a second hydraulic circuit of the hydraulic control unit and the second master chamber.

13. The electronic brake system according to claim 12 , wherein

a simulator device is connected to the first backup flow passage to provide a reaction force in response to a pressing force of the brake pedal.

14. The electronic brake system according to claim 13 , wherein

the simulator device connected to a simulator flow passage branched from the first backup flow passage.

15. The electronic brake system according to claim 12 , wherein

the first backup flow passage is connected to the first master chamber by a first master hose connecting the first master chamber and a first backup flow passage connection port of the hydraulic block, and the second backup flow passage is connected to the second master chamber by a second master hose connecting the second master chamber and a second backup flow passage connection port of the hydraulic block.

16. The electronic brake system according to claim 1 , wherein

the hydraulic control unit includes inlet valves to control the hydraulic pressure of brake fluid transmitted to the wheel cylinders and outlet valves to control the hydraulic pressure of brake fluid discharged to the hydraulic block reservoir from the wheel cylinders,

the hydraulic block further includes reservoir outlet ports connected to the hydraulic block reservoir chamber to transmit oil discharged from the outlet valves.

17. The electronic brake system according to claim 16 , wherein

the reservoir outlet ports include a first reservoir outlet port connected to one of the hydraulic block reservoir chambers and a second reservoir outlet port connected to the other of the hydraulic block reservoir chambers.

18. The electronic brake system according to claim 17 , wherein

the hydraulic control unit includes a first hydraulic circuit to control the hydraulic pressure transmitted to two of the wheel cylinders and a second hydraulic circuit to control the hydraulic pressure transmitted to the other two wheel cylinders, and

the hydraulic block further includes a first hydraulic block reservoir flow passage to connect the first reservoir outlet port and a rear end side of first and second outlet valves provided in the first hydraulic circuit, and a second hydraulic block reservoir flow passage to connect the second reservoir outlet port and a rear end side of third and fourth outlet valves provided in the second hydraulic circuit.

19. An electronic brake system comprising:

a master cylinder unit including a master cylinder to generate a hydraulic pressure and a master cylinder reservoir coupled to the master cylinder to store oil;

a hydraulic block provided with a hydraulic pressure supply device to generate the hydraulic pressure by a hydraulic piston actuated by an electrical signal outputted in response to a displacement of a brake pedal, and a hydraulic control unit to transmit the hydraulic pressure to wheel cylinders provided in each wheel, and disposed to be separated from the master cylinder unit;

a hydraulic block reservoir to supply oil to the hydraulic block side or store discharged oil,

a connection hose to connect the master cylinder reservoir and the hydraulic block reservoir; and

a simulator device to provide a reaction force, one end side of the simulator device is connected to the master cylinder unit and the other side of the simulator device is connected to the hydraulic block reservoir.

20. The electronic brake system according to claim 19 , wherein

the simulator device includes a simulator chamber which stores oil and in which a reaction force piston supported by a reaction force spring is disposed,

the hydraulic block reservoir includes a plurality of hydraulic block reservoir chambers divided by partitions,

the hydraulic block reservoir includes a plurality of hydraulic block reservoir chambers divided by partitions,

the hydraulic block includes a first hydraulic block reservoir flow passage connected to one of the plurality of hydraulic block reservoir chambers and the first hydraulic circuit, and a second hydraulic block reservoir flow passage connected to another one of the plurality of hydraulic block reservoir chambers and the second hydraulic circuit, and

the rear end side of the simulator chamber is connected to the first hydraulic block reservoir flow passage.

Priority Claims (1)
KR 10-2018-0061591 · May 30, 2018 · national
Continuity (3)
Continuation 18103473 · Jan 30, 2023
Continuation 16425882 · May 29, 2019
Related Publication 20240262330A1 · Aug 8, 2024
References Cited (47)
US 8622486B2 · Tandler et al. · 2014 [cited by applicant]
US 9205824B2 · Feigel et al. · 2015 [cited by applicant]
US 9308905B2 · Biller et al. · 2016 [cited by applicant]
US 10358037B2 · Ueno · 2019 [cited by applicant]
US 10576943B2 · Feigel · 2020 [cited by applicant]
US 20070114844A1 · Maki et al. · 2007 [cited by applicant]
US 20110241419A1 · Ohkubo et al. · 2011 [cited by applicant]
US 20140028084A1 · Biller et al. · 2014 [cited by applicant]
US 20150183411A1 · Sakurazawa · 2015 [cited by applicant]
US 20150367828A1 · Oosawa et al. · 2015 [cited by applicant]
US 20150375726A1 · Roll et al. · 2015 [cited by applicant]
US 20160009263A1 · Feigel et al. · 2016 [cited by applicant]
US 20160031326A1 · Ueno · 2016 [cited by applicant]
US 20160090070A1 · Tagata · 2016 [cited by applicant]
US 20170015290A1 · Oosawa et al. · 2017 [cited by applicant]
US 20170137006A1 · Kuhlman · 2017 [cited by applicant]
US 20170158184A1 · Choi et al. · 2017 [cited by applicant]
US 20170210369A1 · Lim et al. · 2017 [cited by applicant]
US 20180050670A1 · Feigel · 2018 [cited by applicant]
US 20180265060A1 · Maruo et al. · 2018 [cited by applicant]
US 20190092295A1 · Jeong et al. · 2019 [cited by applicant]
US 20190100183A1 · Jung et al. · 2019 [cited by applicant]
US 20190299953A1 · Spieker et al. · 2019 [cited by applicant]
US 20190308601A1 · Maj · 2019 [cited by examiner]
US 20190366997A1 · Jeong et al. · 2019 [cited by applicant]
US 20190367000A1 · Lee · 2019 [cited by applicant]
US 20200070792A1 · Bauer et al. · 2020 [cited by applicant]
US 20210402969A1 · Jung · 2021 [cited by applicant]
US 20230174038A1 · Lee · 2023 [cited by applicant]
CN 106132790 · 2016 [cited by applicant]
CN 107985289 · 2018 [cited by applicant]
DE 4014052 · 1991 [cited by applicant]
DE 10239126 · 2003 [cited by applicant]
DE 102016203563 · 2017 [cited by applicant]
JP 5432880 · 2014 [cited by applicant]
JP 6213730 · 2017 [cited by applicant]
JP 6296387 · 2018 [cited by applicant]
KR 1020170065827 · 2017 [cited by applicant]
Notice of Allowance dated Sep. 30, 2022 for U.S. Appl. No. 16/425,882 (now published as 2019/0367000). [cited by applicant]
Final Office Action dated Jun. 6, 2022 for U.S. Appl. No. 16/425,882 (now published as 2019/0367000). [cited by applicant]
Office Action dated Nov. 8, 2021 for U.S. Appl. No. 16/425,882 (now published as 2019/0367000). [cited by applicant]
Office Action dated May 31, 2023 for Chinese Patent Application No. 201910461543.6 and its English machine translation provided by the Applicant's foreign counsel. [cited by applicant]
Office Action dated Oct. 25, 2022 for Chinese Patent Application No. 201910461543.6 and its English translation from Global Dossier. [cited by applicant]
Office Action dated Dec. 12, 2022 for Korean Patent Application No. 10-2018-0061591 and its English translation from Global Dossier. [cited by applicant]
Notice of Allowance dated Nov. 29, 2023 for U.S. Appl. No. 18/103,473 (now published as 2023/0174038). [cited by applicant]
Office Action dated Aug. 16, 2023 for U.S. Appl. No. 18/103,473 (now published as 2023/0174038). [cited by applicant]
Office Action dated Dec. 23, 2023 for Korean Patent Application No. 10-2023-0050932 and its English translation from Global Dossier. [cited by applicant]