Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with the CCVS Combustion System

940482

03/01/1994

Event
International Congress & Exposition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/940482
Pages
11
Citation
Stokes, J., Lake, T., Christie, M., and Denbratt, I., "Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with the CCVS Combustion System," SAE Technical Paper 940482, 1994, https://doi.org/10.4271/940482.
Additional Details
Publisher
Published
Mar 1, 1994
Product Code
940482
Content Type
Technical Paper
Language
English