Brake control system for an electrically operated vehicle
US5951115A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/74
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to a brake control system for an electrically operated vehicle which is adapted to add a hydraulic braking operation to a regenerative braking operation, or change the former for the latter, rapidly and smoothly. An electric motor is operatively connected to a wheel for rotating the wheel, and a motor control unit for controlling the electric motor to apply a rotating force and a regenerative braking force to the wheel. In a main passage for connecting a master cylinder with a wheel brake cylinder, a pressure limit changeover device is disposed. The changeover device includes a first pressure limit device which is adapted to close the main passage when a master cylinder pressure is lower than a first predetermined pressure, and open the main passage when the master cylinder pressure exceeds the first predetermined pressure, and a second pressure limit device which is adapted to close the main passage when the master cylinder pressure is lower than a second predetermined pressure which is lower than the first predetermined pressure, and open the main passage when the master cylinder pressure exceeds the second predetermined pressure. First and secon…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.