Vehicle and control method thereof
US7934370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2007 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Dec 13, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
When a vehicle speed V is greater than a threshold value Vref when an engine speed difference ΔN between an engine speed Ne and a target engine speed Ne* is greater than a threshold value Nref and a catalyst degradation flag Fc is 1, that engine speed Ne is brought to the target engine speed Ne* while the engine is kept firing. However, when the vehicle speed V is less than the threshold value Vref, a fuel cut is executed even if the engine speed difference ΔN is greater than the threshold value Nref and the catalyst degradation flag Fc is 1. The threshold value Vref is set based on a catalyst bed temperature CT so control to suppress catalyst degradation can be continued for longer the more the operating state is such that the catalyst bed temperature CT is high and degradation of the catalyst is promoted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.