System and method for reducing NOx emissions in an apparatus having a diesel engine
US7398644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2005 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Nov 30, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0802
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a mechanical apparatus having a diesel engine including a combustion chamber, the mechanical apparatus also having an aftertreatment device configured to treat emissions from the diesel engine and an intake valve for passing air into the combustion chamber, a method of operating the engine is disclosed, wherein the method includes performing at least one combustion in the combustion chamber at a first intake valve closure timing, determining a temperature of the aftertreatment device, and if the temperature of the aftertreatment device is equal to or below a preselected temperature threshold, then performing at least one combustion in the combustion chamber at a second intake valve closure timing to thereby increase the temperature of exhaust emitted by the diesel engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.