Cylinder device and hydraulic brake system
US9346442B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 27, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Apr 11, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/686
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
When a brake switch is switched from OFF to ON, current is applied to a brake ECU, and a command to switch a master cylinder from a second state to a first state is issued after a lapse of preparation time, so that switching-time change suppression control is performed. A reservoir shutoff valve is closed, and duty control is performed on a communication control valve. The duty ratio is set to 1 when a switching-time control duration expires, and the communication control valve is placed in an open position, to establish the first state. Thus, since the communication control valve is duty-controlled during switching from the second state to the first state, change in the hydraulic pressure of an input chamber is suppressed, and change of the operating feeling is suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.