This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Fuel Economy Advantages on Indian 2-stroke and 4-stroke Motorcycles Fitted with Direct Fuel Injection
Technical Paper
2003-26-0019
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The Indian motorcycle and scooter market is faced with the combined challenge of exhaust emissions control from the environmental perspective and fuel economy demands from the consumer. Indian motorcycles are unique in their strong focus on reduced fuel consumption and this has resulted in the development of engines with quite different combustion characteristics in comparison to their European and ASEAN counterparts.
Aprilia, Peugeot and Piaggio have recently released new scooter models utilizing air assist direct injection on their small 2-stroke engines to meet the ever increasing pressure on exhaust emissions, fuel economy and performance. These new scooter models are achieving good acceptance with the customer due to their combination of superior performance and improved fuel economy.
Recent investigations by Orbital on Indian scooters and motorcycles show that the air assist direct injection system can be applied to Indian 2-stroke engines to meet the Indian 2005 emissions requirements without a catalyst and simultaneously provide a 30-35% fuel economy improvement on the Indian Driving Cycle (IDC). These results are superior to today's good 4-stroke fuel economy motorcycles and advance the 2-stroke motorcycle to best in class fuel economy status.
Investigations have also been conducted by Orbital regarding the application of this air assist direct injection system onto Indian 4-stroke motorcycles. This study has shown good results with a fuel economy improvement of 12-15 % over the current levels. This is a unique achievement and is potentially more cost effective than the fitment of port injection systems when considering the fuel cost saving available with air assist direct injection.
System descriptions, engine and vehicle performance, fuel economy and emissions capability test data are discussed in the following pages.
Recommended Content
Technical Paper | Modeling and Validation of an Over-the-Road Truck |
Technical Paper | Computer Simulation of the University of Wisconsin Hybrid-Electric Vehicle Concept |
Authors
Topic
Citation
Leighton, S. and Ahern, S., "Fuel Economy Advantages on Indian 2-stroke and 4-stroke Motorcycles Fitted with Direct Fuel Injection," SAE Technical Paper 2003-26-0019, 2003, https://doi.org/10.4271/2003-26-0019.Also In
References
- European Union: Legislative acts and other instruments
- Chuang, J. “Taiwan motorcycle emissions control experience” Environmental Protection Administration, Government of the Republic of China Hanoi Workshop, Emissions from 2 and 3 wheelers September 2001
- Archer, M Bell, G. “Advanced electronic fuel injection systems - an emissions solution for both 2 and 4-stroke small vehicle engines” SIAT 2001 conference proceedings
- Aprilia Italian motorcycle and scooter manufacturer in Europe www.aprilia.com
- Ambler, M Zocchi, A. “Development of the Aprilia DITECH™ 50 engine” Proceedings of the SETC 2001 conference in Pisa
- San Yang Motorcycle company in Taiwan www.sym.com.tw
- Worth, D Yang, K. “Air assist direct injection fuel economy with global emissions solutions” JSAE 2002 SAE paper 20025359
- Cathcart, G Zavier, C. Fundamental characteristics of an air-assisted direct injection combustion system as applied to 4-stroke automotive gasoline engines SAE Detroit SAE paper 2000-01-0256