Device and method for controlling variable valve timing of internal combustion engine
US6691506B2 · kind B2 · utility
11Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Apr 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The reference valve timing for an intake valve and an exhaust valve are set based on operating conditions such as an engine load, an engine rotation speed and the like. A cold state of the engine is detected, and when an air-fuel ratio is set to lean during the cold state, the valve timing of the intake and exhaust valves are controlled so that the opening timing of the exhaust valve is retarded with respect to the reference valve timing while reducing a valve overlap amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.