This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with the CCVS Combustion System
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
Authors
Topic
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.Also In
References
- Nakamura N. et al. “Passenger Car Engines for the 21st Century” SAE 911908
- Hadded O. Stokes J. Cartmell A.J. Brisley R.J. Bruck R. “The Achievement of ULEV Emission Standards for Large High Performance Vehicles.” SAE 930389
- Hadded O. Stokes J. Grigg D.W. “Low Emission Vehicle Technology for ULEV and European Stage 3 Emissions Standards.” Autotech 1993
- de Boer C.D. Johns R.J.R. Grigg D.W. Train B.M. Denbratt I. Linna J-R. “Refinement with Performance and Economy for Four Valve Automotive Engines” IMechE 1990, C394/053
- de Boer C.D. Tonkin P.R. “Meeting Future Emission Standards with Good Fuel Economy” IMechE Autotech 1991, C427/12/153
- Hadded O. Denbratt l. “Turbulence Characteristics of Tumbling Air Motion in Four-Valve SI Engines and their Correlation with Combustion Parameters” SAE 910478
- Morris G. et al. “The Ford Zeta Engine Family, Paper 3 - Engine Development” IMechE Autotech 1991, C427/243
- Hu Z. et al. “Correlation between In-Cylinder Flow, Performance and Emissions Characteristics of a Rover Pentroof Four-Valve Engine” IMechE 1992, C448/026
- Larsson T. et al. “The Volvo 3-Litre 6-Cylinder Engine with 4-Valve Technology” SAE 901715
- Iwamoto Y. et al. “The 1.5-Liter Vertical Vortex Engine” SAE 920670
- “The Future of Catalytic Systems” Automotive Engineering April 1992 9 12
- Horie K. et al. “The Development of a High Fuel Economy and High Performance Four-Valve Lean Burn Engine” SAE 920455
- “Honda Lean Burn Won't Cut it in California” Ward's Engine Update 17 16 August 15 1991 1 2
- Schäpertöns H. et al. “VW's Gasoline Direct Injection (GDI) Research Engine” SAE 910054
- Spiegel L. et al. “Mixture Formation and Combustion in a Spark Ignition Engine with Direct Fuel Injection” SAE 920521
- Misumi M. et al. “An Experimental Study of a Low-Pressure Direct-Injection Stratified- Charge Engine Concept” SAE 900653
- Norris-Jones S.R. Russell J.T. “FM - A High Efficiency Combustion System for the Future Light Duty Engine?” SAE 820760
- Lake T.H. Stokes J. Christie M.J Horada O. Shimotani K. “Preliminary Investigation of Solenoid Activated In-Cylinder Injection in Stoichiometric Engines.” SAE 940483
- Stokes J. Lake T.H. “Spark Ignited Internal Combustion Engines” GB Patent Application 9222353.6
- de Boer C.D Stokes J. Lake T.H. “Advanced Gasoline Combustion Systems for Fuel Economy and Emissions.” IMechE Conference, Worldwide Emissions Standards and How to Meet Them May 1993
- French C.C.J. “A Universal Test Engine for Combustion Research.” SAE 830453
- Namazian M. Heywood J. B. “Flow in the Piston-Cylinder Ring Crevices of a Spark-Ignition Engine: Effect on Hydrocarbon Emissions, Efficiency and Power.” SAE 820088
- Matsuo S. “Laminar Burning Internal Combustion Engine with Fuel Injection Time Controlling Function.” European Patent Application 92305969.5