A system for stratifying recycled exhaust gas (EGR) to substantially increase dilution tolerance has been applied to a multi-cylinder port injected four-valve gasoline engine. This system, dubbed Combustion Control through Vortex Stratification (CCVS), has shown greatly improved fuel consumption at stoichiometric conditions whilst retaining ULEV compatible engine-out NOx and HC emission levels. A production feasible variable air motion system has also been assessed which enables stratification at part load with no loss of performance or refinement at full load.
Development Experience of a Multi-Cylinder CCVS Engine
Sae Technical Papers
International Congress & Exposition ; 1995
1995-02-01
Conference paper
English
Development experience of a multi-cylinder CCVS engine
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