Booster and brake apparatus using the same
US9896074B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2012 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Sep 19, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W30/18127
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An input rod is operated by a brake pedal to introduce the air into a variable-pressure chamber through a control valve to propel a power piston, thereby advancing a primary piston to generate a brake fluid pressure in a master cylinder. A part of the reaction force from the fluid pressure is transmitted to the input rod through a reaction member. The primary piston is provided with an idle stroke in which no fluid pressure is generated, and the reaction force to be transmitted to a plunger is limited by a reaction force adjusting spring. In the region of the idle stroke, a fluid pressure is supplied to a wheel cylinder through a fluid pressure control unit to perform regenerative cooperative control, and a reaction force from a reaction spring is applied to the input rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.