Late intake valve closing to improve cold startability for spark-ignition direct-injection (SIDI) engines
US7742869B2 · kind B2 · utility
0Cited by
2References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 21, 2008 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Dec 23, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control system includes a cam phaser that introduces a cam phase angle θ between a camshaft intake lobe and an associated crankshaft. An engine control module communicates with the cam phaser to introduce the cam phase angle θ while an engine is being started. The cam phase angle θ is selected such that the camshaft intake lobe opens an intake valve during at least a portion of a compression stroke of a cylinder that is associated with the camshaft intake lobe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.