Control system for hybrid vehicle
US6223106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | May 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/917
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control system for a hybrid vehicle prevents a voltage across an electric energy storage device from dropping excessively when the electric energy storage device is discharged with a generator/motor operating as an electric motor, for thereby effectively utilizing electric energy stored in the electric energy storage device as much as possible to operate the generator/motor as the electric motor. The control system also prevents the voltage across the electric energy storage device from rising excessively when the electric energy storage device is charged with the generator/motor operating as an electric generator, for thereby charging the electric energy storage device with electric energy generated by the generator/motor as much as possible while protecting the electric energy storage device. The control system controls operation of the generator/motor to keep a charging and discharging current of the electric energy storage device at a level equal to or smaller than a limiting value determined depending on the amount of electric energy stored in electric energy storage device and the temperature thereof when the generator/motor operates as the electric generator or motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.