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A Two-Stroke Chain Saw Engine to Fulfil Current Tier II Emission Levels
Technical Paper
2005-32-0101
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English
Abstract
Two-stroke engines are widely used in handheld power tools due to the demand in high power-weight-ratio and reliability. Particularly, two-stroke engines remain to be the ultimate power source for handheld chain saws and continuous efforts resulted in an improved engine design with increased power output and reduced weight. Besides these continuing efforts engine manufactures must make their products compatible to exhaust emission standards, which have been implemented in most of the important markets worldwide [1], [2].
One particular area of interest is the scavenging process of naturally aspirated two-stroke engines, which affects power and emission output, both. Advanced scavenging methods offer the possibility to design two-stroke engines which achieve the lowest present emission levels i.e. hydrocarbons plus nitrogen-oxides: 50 g/kWh without compromising the power output at given engine parameters such as displacement or rated speed. The paper presents a chain saw engine, which fulfils the requirements described above. Only a full and detailed understanding of the scavenging flow enabled the development engineer to design a clean and powerful engine.
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Citation
Stuecke, P., Egbers, C., and Geyer, W., "A Two-Stroke Chain Saw Engine to Fulfil Current Tier II Emission Levels," SAE Technical Paper 2005-32-0101, 2005.Also In
References
- EU 2002
- US 1997
- Stuecke, P. Egbers, C. Geyer, W. Visualization of the Flow Inside the Transfer Channels of Small Two-Stroke Cylinders 2003 Small Engine Technology Conference Madison, WI SAE Warrendale 2003-32-0008 2003
- White, J. J. Small engines - quo vadis? Plenary session 2004 Small Engine Technology Conference Graz 2004
- Ohtsuji, T. Kobayashi, B. Investigation of Low Emission Two-Stroke Cycle Chain Saw 2002 Small Engine Technology Conference Kyoto, JPN SAE Warrendale 2002-32-1841 2002
- Blair, A. Design and Simulation of Two-Stroke Engines SAE Warrendale 1996
- Heywood, J. B. Cher, E. The Two-Stroke Cycle Engine Taylor & Francis New York SAE Warrendale 1999
- Stuecke, P. Egbers, C. Geyer, W. Visualization of the Scavenging Flow of Small Two-Stroke Cylinders 2004 Small Engine Technology Conference Graz, Austria SAE Warrendale 2004-32-0010 2004
- Schlichting, H. Grenzschichttheorie 8th Edition Karlsruhe, Germany Braun Verlag 1982