This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Different Speed Limiting Strategies for 50cm 3 Two-Wheelers and Their Impacts on Exhaust Emissions and Fuel Economy
ISSN: 1946-3952, e-ISSN: 1946-3960
Published November 08, 2011 by Society of Automotive Engineers of Japan in Japan
Citation: Tromayer, J., Neumann, G., and Kirchberger, R., "Different Speed Limiting Strategies for 50cm3 Two-Wheelers and Their Impacts on Exhaust Emissions and Fuel Economy," SAE Int. J. Fuels Lubr. 5(1):547-557, 2012, https://doi.org/10.4271/2011-32-0587.
Usually the power output of 50 cm₃ two wheelers is higher than necessary to reach the maximum permitted vehicle speed, making engine power restriction necessary. This publication deals with different power restriction strategies for four-stroke engines and their effect on exhaust emissions. Alternative power limitation strategies like EGR and leaning were investigated and compared with the common method of spark advance reduction to show the optimization potential for this certain engine operation conditions. From these tests, a substantial set of data showing the pros and cons in terms of emissions, combustion stability and fuel economy could be derived for each speed limiting technique.