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Emissions and Performance Potential of a Small Stratified Charge 2-Stroke Engine Using Reed Valves
Technical Paper
2006-32-0058
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Stratified concepts offer a reduction of the scavenging losses of 2-stroke engines. STIHL has developed a stratified reed valve engine to comply with Phase2 emissions, introduced into the market in the new STIHL Cutquik⢠TS 700. The engine with a displacement of 98,5 cm3 offers performance and product specifications that exceed its conventional predecessor. The results of the engine optimization process including flow simulation, concept evaluation and combustion process development are presented. The paper focuses on the design specifications of the air head carburetor and the specific layout of the reed valve scavenging process. Further, a cyclone type air filter system is presented.
The engine today meets the FEL 72 g/kWh limit. The concept offers further potential to improve trapping and volumetric efficiency, enabling a power and torque increase as well as emission control for the future.
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Citation
Moeser, C., Gantert, J., Keck, U., Raffenberg, M. et al., "Emissions and Performance Potential of a Small Stratified Charge 2-Stroke Engine Using Reed Valves," SAE Technical Paper 2006-32-0058, 2006, https://doi.org/10.4271/2006-32-0058.Also In
References
- EPA 1999 Control of Emission from non-road spark-ignition engines (EPA Phase II regulation)
- EPA 1999 Office of Air and Radiation EPA Supplement Draft Regulatory Impact Analysis, Phase 2 SNPRM June 1999
- Sawada, T. Wada, M. 1998 Development of a Low Emission Two-Stroke Cycle Engine SAE-Paper 980761
- Zahn, W. Rosskamp, H. Schlossarczyk, J. 2000 Low Emission Technologies for High-Performance Handheld Outdoor Products SAE-Paper 2000-01-0896
- Nuti, M. Marcacci, M. Pardini, R. Caponi, D. 1997 FAST Injection System: A Very Simple Way to Lean Combustion in SI Engines JSAE 9734061
- Rosskamp, H. Klimmek, A. Pretzsch, P. Mugele, M. 2001 Scavenge Loss Mechanisms and Their Driving Forces in Loop-Scavenged High-Performance Two-Stroke Engines SAE-Paper 2001-01-1826/4247