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A High Performance and Low Emissions Motorcycle Engine with the VIP System
Technical Paper
978478
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Language:
English
Abstract
A control system for the intake flow on 4-stroke engines had been developed. It was named the VIP (Variable Intake Port) system. Such system was proved an effective strategy to achieve fast lean-bum at part load and to increase volumetric efficiency at wide open throttle.
Test results showed that the maximum power of the VIP engine could rise more than 9 % in comparison with the original one. Under the ECE-40 test mode, this VIP motorcycle, without catalyst and secondary air system, could improve at least 16 % on fuel consumption. Emissions of HC+NOx was reduced from 1.07 to 1.00 g/km, and CO from 3.69 to 0.75 g/km. Not only the combustion variations at part load were improved, but also the maximum vehicle speed and the vehicle acceleration were superior to the original motorcycle.
Authors
Topic
Citation
Gau, T. and Peng, Y., "A High Performance and Low Emissions Motorcycle Engine with the VIP System," SAE Technical Paper 978478, 1997.Also In
References
- Omori S. , Iwachido K. , Motomochi M. , & Hirako O. Effect of Intake Port Flow Pattern on the In-Cylinder Tumbling Air Flow in Multi-Valve SI Engines SAE 910477 1991
- Matsushita S. , Inoue T. , Nakanishi K. , Okumura T. , & Isogai K. Effects of Helical Port with Swirl Control Valve on the Combustion and Performance of S.I. Engine SAE 950046 1985
- Horie K. , Nishizawa K. , Ogawa T. , Akazaki S. , & Miura K. The Development of a High Fuel Economy and High Performance Four-Valve Lean Burn Engine SAE 920455 1992
- Iwamoto Y. , Danno Y. , Hirako O. , Fukui T. , & Murakami N. The 1.5-Liter Vertical Vortex Engine SAE 920670 1992