Electric generation control system for hybrid vehicle
US5614809A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1995 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Aug 9, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/903
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
When the remaining capacity of a battery on a hybrid vehicle is smaller than a threshold value or the battery is unable to output the amount of electric energy required to propel the hybrid vehicle with a propulsive electric motor, the engine is started by a generator which operates in a motor mode. After the engine has been warmed up, the generator operates in a generator mode to generate electric energy which is supplied to the battery and the propulsive electric motor. The threshold value for the remaining capacity of the battery is greater as the atmospheric pressure is lower. Therefore, if the hybrid vehicle is running under a low atmospheric pressure such as on a highland, the electric energy is supplied from the generator to the battery and the propulsive electric motor at an early stage where the capacity of the battery is relatively high. The generator also starts to generate electric energy when the battery is unable to output an amount of electric energy sufficient enough to propel the hybrid vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.