Coordination of variable cam timing and variable displacement engine systems
US8150605B2 · kind B2 · utility
21Cited by
13References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2009 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Dec 10, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Systems and methods are provided for operating an internal combustion engine including a variable cam timing (VCT) mechanism in cooperation with a plurality of deactivatable cylinders, each cylinder with a plurality of cylinder valves. One example method comprises, operating at a first cylinder valve timing before a transition of reactivating deactivated cylinders, and, before the transition, advancing cylinder valve timing from the first valve timing, where after the transition the cylinder valve timing remains at a second valve timing, the second valve timing advanced relative to the first valve timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.