The invention is to provide a brake hydraulic pressure generating device capable of miniaturizing an on/off value and improving the operation feeling of a brake operator. The brake hydraulic pressure generating device includes: a main hydraulic pressure passage which communicates between a master cylinder and a wheel cylinder, a branch hydraulic pressure passage (9e) which is branched from the main hydraulic pressure passage and reaches a stroke simulator, and an on/off valve (6) which opens/closes the branch hydraulic pressure passage (9e). The on/off valve (6) includes a first valve mechanism (10) including a first valve portion (11) and a first valve seat (12), and a second valve mechanism (20) including a second valve portion (21) and a second valve seat (71). The first valve seat (22) is formed in the second valve portion (21). A pressure receiving area in which brake hydraulic pressure acting from the stroke simulator side is received is set to be higher in the second valve portion than in the first valve portion. Brake fluid flows from the main hydraulic pressure passage. Further, the brake hydraulic pressure enables the second valve portion (21) to leave from the second valve seat (71) so as to allow brake fluid to flow from the stroke simulator.
Brake hydraulic pressure generating device
2015-09-30
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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