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Provision for Emission Reduction of Sports Utility Motorcycle
Technical Paper
1999-01-3259
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The purpose of this study was to find compatible specifications both of emission reduction and high power output with good throttle response for a sports utility motorcycle. In the emission reduction challenge, we examined equipping the exhaust system with a catalytic converter to achieve sufficient emission reduction. The catalytic converter, however, caused a temperature rise in the exhaust system, which caused a pressure propagation change. Additional muffler design optimization effectively maintained high performance and acceleration. The exhaust valve device was also optimized for emission reduction and high power output over a wide engine speed range. The optimized control of the exhaust valve was beneficial to preventing short-circuit of fresh mixture gas and early activation of the catalyst. Such comprehensive specifications could satisfy the performance and driveability characteristics required for sports utility motorcycles.
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Citation
Mishina, F. and Ohira, T., "Provision for Emission Reduction of Sports Utility Motorcycle," SAE Technical Paper 1999-01-3259, 1999, https://doi.org/10.4271/1999-01-3259.Also In
References
- Shimizu Y. “2-Cycle Engine Exhaust Control Device” SETC'91 Proceedings 77 81 SAE Paper 91128
- Ohira T. Mishina F. Kobayashi M. “Integrated Control Device of Exhaust Throttle, Air Induction and Ignition for Emission Reduction” SETC'97 Proceedings 303 312 SAE Paper 972115
- Ohira T. Ikeda Y. Takahashi T. Ito T. Nakajima T. “Exhaust Gas Flow Behavior in a Two-Stroke Engine” SAE Transaction 102 SAE Paper 930502
- Ishibe N. Ohira T. “Combustion Analysis and Its Optimization in Two-Stroke Engines” SETC'95 Proceedings 247 261 SAE Paper 951788