Development of an Ethanol Blend, Two-Stroke, Direct-Injection Snowmobile for Use in the Clean Snowmobile Challenge and National Parks Grant uri icon



  • Due in part to stringent noise and air pollution control measures recently imposed on snowmobiles by the US National Park Service, the Society of Automotive Engineers (SAE) instituted a student competition called the Clean Snowmobile Challenge (CSC), first run in 2000. The competition is designed to encourage the development of a snowmobile that will meet or exceed specific required pollution and noise control measures, while maintaining or improving the snowmobile’s performance. The objective of this project is to produce a snowmobile that will meet the criteria for the 2010 CSC, which requires that snowmobiles be able to use a fuel with a higher percentage ethanol blend. The snowmobile has a modified stock chassis with a drivetrain designed to minimize sound production and maximize power transmission. The power plant for the 2010 University of Idaho snowmobile is a smaller stock direct injected two-stroke engine. This engine and basic snowmobile have been proven with a CSC First Place showing in the 2007 competition, and a Second Place in 2008, and will be modified to use E20 (20 percent ethanol/80 percent premium gasoline). Other changes for the 2010 competition will be acceptability of user selectable inputs, such as a switch to maximize fuel economy or power, which has not been allowed in the past. The team will continue to use graduate mentors as leaders for this primarily undergraduate competition team.

date/time interval

  • January 1, 2010 - January 1, 2011