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Are low-cost, low-tech solutions adequate for small capacity EU III motorcycles?
Published October 30, 2007 by Society of Automotive Engineers of Japan in Japan
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More and more stringent emission legislation is implemented in the world wide market of motorcycles leading to higher product costs. But not every market is ready for high technological levels. Therefore the main topic of interest is: “Will a small one cylinder motorbike engine need an electronic device for fuel metering or is it possible to use standard carburetors in combination with some smart but simple ideas, to fulfil EU III cold start emission regulations?” The described ideas deal with a novel secondary air supply, an improved cooling system and simple NOx reduction methods, always paying attention to the performance and driveability of the vehicle. After describing the prototype design of the engine modifications, the achievable results with their pros and cons are discussed. Online recorder measurements give interesting emission plots of HC, CO and NOx. The homologation measurement results point out the obtainable values of the limited emissions. Finally, solutions for a marketable mass production can be derived from each tested implementation.
- Jürgen TROMAYER - Institute for Internal Combustion Engines and Thermodynamics, Graz University of Technology, Austria
- Roland KIRCHBERGER - Institute for Internal Combustion Engines and Thermodynamics, Graz University of Technology, Austria
- Gerd NEUMANN - Institute for Internal Combustion Engines and Thermodynamics, Graz University of Technology, Austria
- Helmut EICHLSEDER - Institute for Internal Combustion Engines and Thermodynamics, Graz University of Technology, Austria
CitationTROMAYER, J., KIRCHBERGER, R., NEUMANN, G., and EICHLSEDER, H., "Are low-cost, low-tech solutions adequate for small capacity EU III motorcycles?," SAE Technical Paper 2007-32-0014, 2007.
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