Method for internal combustion engine control using pressure ratios
US7418336B2 · kind B2 · utility
3Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2007 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Apr 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention comprises a method to operate a direct-injection engine operative at various air/fuel ratios. The method comprises monitoring in-cylinder pressure, along with a corresponding engine crank position to periodically to determine instantaneous in-cylinder pressure states corresponding to the engine crank position during compression and expansion. Pressure ratios are determined based upon the instantaneous in-cylinder pressure states. A combustion heat release is determined based upon the pressure ratios. An aspect of the invention comprises extending the operation to diesel, diesel premixed and to HCCI engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.