Vehicle brake system
US9163645B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | May 18, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2201/03
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle brake system includes a cylinder, a master piston including a pressure applying piston and a projection portion, a servo chamber, a contact/separation determining means determining a separated state and a contact state between the input piston and the master piston, a pilot pressure generating device generating a pilot pressure, a servo pressure generating device, a servo pressure measuring device measuring a servo pressure, and a master pressure estimating means estimating a master pressure from the pilot pressure and a first servo ratio, which is a cross-sectional area ratio between a first pilot chamber and a servo pressure generating chamber, in a case of the separated state, and estimating the master pressure based on the servo pressure, the pilot pressure and a second servo ratio, which is a cross-sectional area ratio between a second pilot chamber and the servo pressure generating chamber, in a case of the contact state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.