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Power restriction on small capacity four stroke engines by exhaust gas recirculation - A new way of speed limiting with reduced exhaust emissions?
Published November 03, 2009 by Society of Automotive Engineers of Japan in Japan
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Looking at the market for 2-wheelers driven by small capacity four stroke engines, it turns out that the legislation for exhaust emissions is mostly combined with a regulation of vehicle speed. Most of the vehicles in this category are still driven by engines equipped with carburetors which, unlike fuel injection systems, do not give the possibility to cut off fuel metering when high speed is achieved. When a carburetor is applied with a simple ignition unit, a reduction of spark advance is the only way to ensure correct vehicle speed, but there are a lot of disadvantages in terms of exhaust emissions and fuel economy coming up with this method of engine power restriction. This leads to the idea of using exhaust gas recirculation (EGR) to reduce engine power when necessary.
- Jürgen Tromayer - Graz University of Technology, Institute for Internal Combustion Engines and Thermodynamic
- Gerd Neumann - Graz University of Technology, Institute for Internal Combustion Engines and Thermodynamic
- Roland Kirchberger - Graz University of Technology, Institute for Internal Combustion Engines and Thermodynamic
- Helmut Eichlseder - Graz University of Technology, Institute for Internal Combustion Engines and Thermodynamic
CitationTromayer, J., Neumann, G., Kirchberger, R., and Eichlseder, H., "Power restriction on small capacity four stroke engines by exhaust gas recirculation - A new way of speed limiting with reduced exhaust emissions?," SAE Technical Paper 2009-32-0069, 2009.
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