EGR extraction immediately downstream pre-turbo catalyst
US8250866B2 · kind B2 · utility
7Cited by
16References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2009 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Oct 7, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/15
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turbocharged, diesel engine has a small catalyst provided upstream of the turbocharger with EGR collected from the exhaust stream downstream of the catalyst and upstream of the turbocharger. By making the catalyst small, it packages into a pipe coupling the manifold to the turbocharger, readily reaches lightoff, and absorbs little exhaust energy, thereby providing acceptable conversion of hydrocarbons and CO, but still allowing fast turbocharger response. In one embodiment, the engine has two cylinder banks, two exhaust manifolds, and two pre-turbo catalysts installed upstream of the turbine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.