Emission reduction in a diesel engine by selective use of high-and low-pressure EGR loops
US6973786B1 · kind B1 · utility
28Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2004 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Oct 12, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/23
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A compression ignition engine (10) has an EGR system operable to provide a first EGR loop (46, 52, 54) when the engine is lightly loaded and a second EGR loop (46, 52, 56) when the engine is more heavily loaded. When the first EGR loop is selected, exhaust gas is recirculated from a location upstream of a turbine (20) of a turbocharger (18) to a location downstream of the turbocharger compressor (22). When the second EGR loop is selected, exhaust gas is recirculated from a location downstream of the turbine to a location upstream of the compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.