This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of a Stratified Scavenging System for Small Capacity Two-Stroke Engines
Technical Paper
1999-01-3270
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The application of low cost stratified scavenging systems to the two-stroke engine is described. Previous results from multi-stream systems tested at The Queen's University of Belfast are reviewed and results from single- and double-entry air-head engines are presented.
The most promising results relate to a 270cm3 single cylinder cross-scavenged engine with the single-entry air-head system. Effective trapping was obtained by injecting fuel into the crankcase and inducing air through an inlet at the top of the transfer ducts. The results showed significant improvements over the standard homogeneous scavenged engine. The brake specific fuel consumption was reduced by up to 22% and the brake specific hydrocarbons by up to 55%.
Recommended Content
Authors
Citation
Cunningham, G., Kee, R., Kenny, R., and Skelton, W., "Development of a Stratified Scavenging System for Small Capacity Two-Stroke Engines," SAE Technical Paper 1999-01-3270, 1999, https://doi.org/10.4271/1999-01-3270.Also In
References
- Hopkinson, B. “The Charging of Two-Cycle Internal Combustion Engines” Trans. NE Coast Instn. Engineers and Shipbuilders 30 433 462 1914
- Blair, G.P. Kenny, R.G. “Further Developments in Scavenging Analysis for Two-Stroke Engines” SAE Paper No. 800038 1980
- Nuti, M. Martorano, L. “Short-Circuit Ratio Evaluation in the Scavenging of Two-Stroke S.I. Engines” SAE Paper No. 850177 February 1985
- Hashimoto, E. Tottori, T. Terata, S. “Scavenging Performance Measurements of High Speed Two-Stroke Engines” SAE Paper No. 850182 February 1985
- Tsuchiya, K. Hirano, S. Okamura, M. Gotoh, T. “Emission Control of Two-Stroke Motorcycle Engine by the Butterfly Exhaust Valve” SAE Paper No. 800973 September 1980
- Hata, N. Iio, T. “Improvement of Two-Stroke Engine Performance with the Yamaha Power Valve System (YPVS)” SAE Paper No. 810922 September 1981
- Schlunke, K.C. Ahern, S.R. Leighton, S.R. Kitson, M.R. “Fuel Consumption and Emissions Reduction in Small Displacement Two-Stroke Cycle Engines” 4th Graz Two-Wheeler Symposium TUGraz 1991
- Ishihara, S. “An Experimental Investigation of a New U-Cylinder Uniflow Scavenged Engine” SAE Paper No. 860031 February 1986
- Blair, G.P. Houston, R.A.R. McMullan, R. K. Steel, N. Williamson, S.J. “A New Piston Design For a Cross-Scavenged Two-Stroke Cycle Engine with Improved Scavenging and Combustion Characteristics” SAE Paper No. 841096 September 1984
- Jante, A. “Scavenging Flow Ducts of 3-Cylinder 2-Stroke Cycle Engines” Society of Automotive Engineers Transactions 77 1968 SAE Paper No. 680468 1968
- Sweeney, M.E.G. Kenny, R.G. Swann, G.B.G. Blair, G.P. “Single Cycle Gas Testing Method for Two-Stroke Engine Scavenging” SAE Paper No. 850178 February 1985
- Shiga, G. Nishida, T. Ryu, Y. Tugekawa, T. Higashi, K Maeda, T. “Development of All Position-Operatable Small Four-Stroke Engine” SAE Paper No 972104 1997
- Conley, J.G. Olsen, J.K. Kurihara, K. Imagawa, Y. Rickard, G. “The New Ryobi 26.2 cc, OHV, 4-Stroke Engine for Hand Held Power Equipment Applications” SAE Paper No 961728 1996
- Yui, S. Ohnishi, S. “A New Concept of Stratified Charge Two-Stroke Engine, Yui and Ohnishi Combustion Process (YOCP)” SAE Paper No. 690468 1969
- Kuentscher, V. “Application of Charge Stratification, Lean Burn Combustion Systems and Anti-Knock Control Devices in Small Two-Stroke Cycle Gasoline Engines” SAE Paper No. 860171 February 1986
- Schlunke, K.C. “Der Orbital Verbrennungsprozess des Zweitaktmotors” Tenth International Engine Symposium Vienna 63 78 April 1989
- Blair, G.P. Kee, R.J. Carson, C.E. Douglas, R. “The Reduction of Fuel Consumption by Direct Air Assisted Fuel Injection into a Two-Stroke Engine” 4th Graz Two-Wheeler Symposium April 1991
- Thornhill, D. Fleck, R. “Design of a Blower Scavenged, Piston Ported, V6 Two-Stroke Automotive Engine” SAE Paper No. 930980 1993
- Conlon, P. Fleck, R. “An Experimental Investigation to Optimise the Performance of a Supercharged, Two-Stroke Engine” SAE Paper No. 930982 1993
- Duret, P. Moreau, J. F. “Reduction of Pollutant Emissions of the IAPAC Two-Stroke Engine with Compressed Air Assisted Fuel Injection” SAE Paper No. 900801 1990
- Dabadie, J-C. Duret, P.L. Venturi, S. “SCIP: A New Simplified Camless IAPAC Direct Injection for Low Emission Small Two-Stroke Engines” SAE Paper No 972078 1997
- Blundel, D.W. Sandford, M. “Two Stroke Engines - The Lotus Approach” SAE Paper No. 920779 1992
- Mallory, M. “Two-Cycle Internal Combustion Engine” 1939
- Otani, J. “Two-Cycle Internal Combustion Engine” 1975
- Jaulmes, E. “Are There any New Technological Advances in the Scavenging of the Two-Stroke Engine” Champion Spark Plug Conference 1978
- Onishi, S. Jo, S.H. Jo, P.D. “Multi-Layer Stratified Scavenging (MULS) - A New Scavenging Method for Two-Stroke Engines” SAE Paper No. 840420 1984
- Batoni, G. “An Investigation into the Future of Two-Stroke Motorcycle Engine” SAE Paper No. 780710 1978
- Blair, G.P. “Stratified-Charge Two-Stroke Internal Combustion Engines” December 1975
- Blair, G.P. Hill, B.W. Miller, A.J. Nickell, S.P. “Reduction of Fuel Consumption of a Spark-Ignition Two-Stroke Cycle Engine” SAE Paper No. 830093 1983
- Hill, B.W. Blair, G.P. “Further Tests on Reducing Fuel Consumption with a Carburetted Two-Stroke Cycle Engine” SAE Paper No. 831303 1983
- Bennett, G. “A Simplified Inlet System for Stratified Charging of Two-Stroke Cycle Spark Ignition Engines” MSc Thesis The Queen's University of Belfast May 1985
- Morrison, K. “Tanaka Purefire” Power Equipment Trade July August 1998
- Glover, S. Mason, B. “Evaluation of a Low Emission Concept on a 50cc 2-Stroke Scooter Engine” SAE Ppaer No 951783 1995
- McElligott, S. Douglas, R. Kee, R.J. Glover, S. “Stratified Scavenging Applied to a Small Capacity Two-Stroke Scooter for the Reduction of Fuel Consumption and Emissions” SAE Paper No 1999-01-3271 1999
- Rochelle, P.H.C. “Delayed Charging: A Means to Improve Two-Stroke Engine Characteristics” SAE Paper No 941678 1994
- Kee, R.J. “Stratified Charging of a Cross-Scavenged Two-Stroke Cycle Engine” Doctoral Thesis, Dept. of Mech. and Ind. Engineering The Queen's University of Belfast 1988
- Lanchester, F.W. Pearsall, R.H. “An Investigation of Certain Aspects of the Two-Stroke Engine for Automobile Vehicles” The Automobile Engineer February 1922
- Stephenson, W. “Explosive Engine” December 1911
- Iwai, T. “Two Cycle Internal Combustion Engines” Yamaha Hatsudoki Kabushiki Kaisha Iwata, Japan February 1978
- Wolf, F. July 1977
- Ramesh, A. Nagalingam, B. Gopalakrishnan, K.V. “Improvement In The Performance Of A Two- Stroke Spark-Ignition Engine Through Extra Reed Valves Fitted At The Transfer Ducts” SAE Paper No. 859374 1985
- Saxena, M. Mathur, H.B. Radzimirski, S. “A Stratified Charging Two-Stroke Engine for Reduction of Scavenged-Through Losses” SAE paper No. 891805 1989
- Toshiharu, S. Minoru, W. Masanori, N. Buhei, K. “Development of a Low Emission Two-Stroke Cycle Engine” SAE Paper No 980761 1998
- Yamamoto, T. Ohta, T. Iwano, H. “An Analysis on the Behaviour of Fuel Droplets in the Intake Manifold” JSAE Review December 1985
- Agnew, M.J. Currie J.H. “Evaluation of a New Concept Stratified Two-Stroke Engine” MSc Thesis The Queen's University of Belfast May 1987
- Douglas, R. “AFR and Emission Calculations for Two-Stroke Cycle Engines” Paper No. 901599 September 1990
- Xiaofeng, Y. Ke, Z. Guowei, L. Deming, J. Shenghua, L. Yashi, K. “Diaphragm Fuel Injection System (DFI) for Stratified-Charging of Small Two-Stroke Gasoline Engines” SAE Paper No 960365 1996