Method and system of requesting engine on/off state in a hybrid electric vehicle
US7216729B2 · kind B2 · utility
22Cited by
13References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2003 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | May 10, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/905
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and system of engine start/stop control for a HEV that monitors the battery and requests a specific engine state based on condition of the battery. A battery parameter such as discharge power limit (DPL) or state of charge (SOC) is compared with a set of threshold levels including a MIN level, an ON level, and an OFF level and the result of the comparison provides inputs to a state machine. The state machine includes an ON state, an OFF state and a OPPORTUNISTIC state. The machine transitions between the various states as a function of DPL and SOC relative to the sets of threshold levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.