Browse Publications Technical Papers 2009-01-2625
2009-11-02

Development of an In-Service Snowmobile Emission Test Procedure For the SAE Clean Snowmobile Challenge 2009-01-2625

As concerns over air pollution continue to increase, all vehicles are subject to greater scrutiny for their emissions levels. Snowmobiles and other off-road recreational vehicles are now required to meet emissions regulations enacted by the United States Environmental Protection Agency (EPA). Currently these vehicles are certified using a stationary test procedure with the engine operating attached to a dynamometer and following a five-mode test cycle. The five modes range from idle to wide open throttle and are chosen to represent the typical operation regime of a vehicle. In addition, the EPA five-mode stationary emissions test has been traditionally used for scoring competition snowmobiles at the SAE Clean Snowmobile Challenge (CSC). For the 2009 CSC, in-service emission testing was added to the competition to score the teams on actual, in-use emissions during operation of their competition snowmobile operated on a controlled test course. The testing was done using a Semtech-DS mobile emissions analyzer that was installed in an enclosed sleigh and pulled behind the snowmobile. This paper discusses the development of the in-service test procedure that was used to score the competition snowmobiles during the 2009 CSC and presents preliminary data collected during this development. The results from the In-Service Emission Event at the 2009 CSC are also presented and discussed along with the results from the stationary, five-mode emissions test. Future development plans for in-service emission measurements include improving accuracy and incorporating real-time fuel flow measurement to permit truly dynamic vehicle operation during emissions sampling.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X