Engine control method and engine control system
US7729843B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2006 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Mar 8, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control method and an engine control system that can inhibit the emission of NOx and reduce noise are provided. An engine control method in which an engine 2 is caused to perform diffusion combustion at normal times and switched from diffusion combustion to premixed combustion when an engine load is low, wherein when the engine 2 is switched from the diffusion combustion to the premixed combustion, an oxygen concentration in an intake air of the engine 2 is found and when the found oxygen concentration exceeds a threshold of NOx generation oxygen concentration that has been set in advance, switching from the diffusion combustion to a fuel injection mode of the premixed combustion is stopped, and when the found oxygen concentration then becomes equal to or less than the threshold of NOx generation oxygen concentration, switching is performed to the premixed combustion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.