US 12,252,211 B2
Hydraulic pressure control unit, brake system, and straddle-type vehicle
Kazuki Chiba, Kanagawa (JP); Hiroaki Atsushi, Kanagawa (JP); and Shigeki Ikeda, Kanagawa (JP)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/638,487
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Aug. 17, 2020, PCT No. PCT/IB2020/057722
§ 371(c)(1), (2) Date Feb. 25, 2022,
PCT Pub. No. WO2021/038365, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-156224 (JP), filed on Aug. 29, 2019.
Prior Publication US 2022/0411010 A1, Dec. 29, 2022
Int. Cl. B62L 3/02 (2006.01); B60T 8/17 (2006.01); B60T 8/176 (2006.01); B60T 13/14 (2006.01); B60T 13/68 (2006.01); B60T 17/22 (2006.01); B62K 21/02 (2006.01)
CPC B62L 3/023 (2013.01) [B60T 13/142 (2013.01); B60T 13/686 (2013.01); B60T 17/22 (2013.01); B60T 8/1706 (2013.01); B60T 8/176 (2013.01); B60T 2270/10 (2013.01); B60T 2270/88 (2013.01); B62K 21/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic pressure control unit (1) for a brake system (100) mounted to a vehicle (200) and capable of executing anti-lock brake control, the hydraulic pressure control unit (1) being configured to store a brake fluid that is released from a wheel cylinder (251) during depressurization in the anti-lock brake control in an accumulator (33) and to discharge the brake fluid in the accumulator (33) to outside of the accumulator (33) in a pumpless manner, the hydraulic pressure control unit (1) comprising:
a base body (10) formed with: a master cylinder port (11) to which a fluid pipe (101) communicating with a master cylinder (242) is connected; a wheel cylinder port (12) to which a fluid pipe (102) communicating with the wheel cylinder (251) is connected; and an internal channel (13) that communicates the master cylinder port (11) and the wheel cylinder port (12) with each other;
an inlet valve (31) that is provided to an inlet valve recess (18) formed in the base body (10) and opens/closes the internal channel (13) during the anti-lock brake control; and
an outlet valve (32) that is provided to an outlet valve recess (19) formed in the base body (10) and opens/closes the internal channel (13) during the anti-lock brake control, wherein
the master cylinder port (11) is formed in a first surface (25) of the base body (10),
the wheel cylinder port (12) is formed in a second surface (26) of the base body (10), the second surface (26) opposing the first surface (25),
the internal channel (13) is configured not to be able to return the brake fluid in the accumulator (33) to the master cylinder port (11) without interposing the outlet valve (32), and
the inlet valve recess (18) and the outlet valve recess (19) are aligned in a direction (Z) in which the first surface (25) and the second surface (26) are aligned.