Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with the CCVS Combustion System
Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with the CCVS Combustion System
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- New search for: Denbratt, Ingemar
- New search for: Stokes, J.
- New search for: Christie, M. J.
- New search for: Lake, T. H.
A system for stratifying recycled exhaust gas (EGR) in order to substantially increase dilution tolerance has been applied to a single cylinder manifold injected pent-roof four-valve gasoline engine. This system has been given the generic name Combustion Control by Vortex Stratification (CCVS). Preliminary research has shown that greatly improved fuel consumption is achievable at stoichiometric conditions compared to a conventional version of the same engine whilst retaining ULEV NOx levels. Simultaneously the combustion system has shown inherently low HC emissions compared to homogeneous EGR engines. A production viable variable air motion system has also been assessed which increases the effectiveness of the stratification whilst allowing full load refinement and retaining high performance.
Document information
Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with the CCVS Combustion System
Sae Technical Papers
International Congress & Exposition ; 1994
1994-03-01
Conference paper
English
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