`Clean' Snowmobile Produces Lower Emissions Than The Average Car at SAE Clean Snowmobile Challenge 2001(TM)

Modified Snowmobile with Good Performance Produces Significantly Less Unburned

Hydrocarbons, Carbon Monoxide, and Oxides of Nitrogen (NOx) Than an Average

Automobile



Apr 11, 2001, 01:00 ET from Society of Automotive Engineers

    JACKSON, Wyo., April 11 /PRNewswire/ -- Organizers of the Society of
 Automotive Engineers Clean Snowmobile Challenge have compared the emissions of
 one of the cleanest redesigned snowmobiles in the competition to the tailpipe
 emissions of an average automobile.  It turns out that the redesigned
 snowmobile is far less polluting.
     Emissions tests run during the SAE collegiate design event revealed that a
 snowmobile designed by Kettering University produces lower unburned
 hydrocarbon (1.5 to 7 times less), carbon monoxide (1.5 to 7 times less), and
 oxides of nitrogen (and 5 to 23 times less) levels than the average automobile
 driven in Yellowstone National Park.  The Kettering University entry also
 boasted acceleration performance better than the late-model 500 cc two-stroke
 snowmobile used as a control snowmobile in the Clean Snowmobile testing.
     "The Kettering University snowmobile is not only clean, it will set you
 back on your seat," said competition co-founder/organizer, Teton County
 Commissioner Bill Paddleford, who is also an avid snowmobiler.  "I would love
 to take this snowmobile out in the backcountry.  It handles well and has lots
 of power."
     Comparing snowmobile pollution to automobile pollution is a difficult
 task, due to differences between car and snowmobile emission test cycles.  To
 help standardize their calculations, organizers used the same calculation
 methods and assumptions contained in the February 2000 National Park Service
 Air Quality Resources Division report titled, Air Quality Concerns Related to
 Snowmobile Usage in National Parks.  This report is generally accepted by
 environmental groups as being the most comprehensive and credible assessment
 of Yellowstone's air pollution to date.
     "Normally, we wouldn't take the time to make these comparisons because
 they have no bearing on our event," said environmental engineer and co-founder
 of the SAE Clean Snowmobile Challenge, Dr. Lori Fussell.  "SAE is dedicated to
 providing engineering students with real-world problem solving experiences
 that will make them better engineers for the future.
     "Our competition focuses on conducting high-quality research on methods to
 reduce snowmobile emissions and sound levels without sacrificing performance."
 Just before the competition began however, Dr. Fussell was asked by an
 environmental group concerned with winter use in Yellowstone National Park to
 use the competition results to make a direct comparison between cars and
 snowmobiles.  "When I saw the quality of the work the students had done, I
 decided to see how their data stacked up."
     It is not surprising to organizers that the snowmobile from Kettering
 University is cleaner than the average car.  The snowmobile features a
 Daihatsu 659cc turbocharged 4-stroke engine.  This engine is used in the
 Dahaitsu Mira, a mini-van that meets strict Japanese 2006 emission standards.
 An added bonus -- the turbocharged engine is priced at just $600, including
 the turbocharger, catalyst, and engine management system.
     Designing a cleaner snowmobile is just one of the objectives of the SAE
 Clean Snowmobile Challenge.  Noise abatement is also an important part of the
 competition.  Highly sensitive audio equipment measured sound levels from this
 year's collegiate entries.  Measurements were taken 50 feet from the road as
 the snowmobiles drove by at full throttle.  The quietest snowmobile this year
 had a high reading of 67dBA.  The ultra-clean Kettering University snowmobile
 hit a high measure of 72dBA on one of its passes.  For perspective, the
 2-stroke control (stock) snowmobile hit 78dBA, a level that is within legal
 limits in National Parks.  The 67dBA reading represents an approximate 75%
 reduction in the noise level from that of the control snowmobile.
     Dr. Fussell and Commissioner Paddleford teamed up to create the SAE Clean
 Snowmobile Challenge in the fall of 1998.  The two Teton County residents saw
 a need for improvements in noise and exhaust emissions from snowmobiles, but
 also recognized the importance of maintaining performance and keeping costs
 down.  Dr. Fussell had participated in SAE Collegiate Design Competitions as
 an engineering student at the University of Tennessee, and the pair came to
 SAE with a proposal to make the Clean Snowmobile Challenge a part of SAE's
 extensive schedule of collegiate events.  SAE Collegiate Design events are now
 held on six continents and host engineering students from over 150
 universities worldwide.
 
 

SOURCE Society of Automotive Engineers
    JACKSON, Wyo., April 11 /PRNewswire/ -- Organizers of the Society of
 Automotive Engineers Clean Snowmobile Challenge have compared the emissions of
 one of the cleanest redesigned snowmobiles in the competition to the tailpipe
 emissions of an average automobile.  It turns out that the redesigned
 snowmobile is far less polluting.
     Emissions tests run during the SAE collegiate design event revealed that a
 snowmobile designed by Kettering University produces lower unburned
 hydrocarbon (1.5 to 7 times less), carbon monoxide (1.5 to 7 times less), and
 oxides of nitrogen (and 5 to 23 times less) levels than the average automobile
 driven in Yellowstone National Park.  The Kettering University entry also
 boasted acceleration performance better than the late-model 500 cc two-stroke
 snowmobile used as a control snowmobile in the Clean Snowmobile testing.
     "The Kettering University snowmobile is not only clean, it will set you
 back on your seat," said competition co-founder/organizer, Teton County
 Commissioner Bill Paddleford, who is also an avid snowmobiler.  "I would love
 to take this snowmobile out in the backcountry.  It handles well and has lots
 of power."
     Comparing snowmobile pollution to automobile pollution is a difficult
 task, due to differences between car and snowmobile emission test cycles.  To
 help standardize their calculations, organizers used the same calculation
 methods and assumptions contained in the February 2000 National Park Service
 Air Quality Resources Division report titled, Air Quality Concerns Related to
 Snowmobile Usage in National Parks.  This report is generally accepted by
 environmental groups as being the most comprehensive and credible assessment
 of Yellowstone's air pollution to date.
     "Normally, we wouldn't take the time to make these comparisons because
 they have no bearing on our event," said environmental engineer and co-founder
 of the SAE Clean Snowmobile Challenge, Dr. Lori Fussell.  "SAE is dedicated to
 providing engineering students with real-world problem solving experiences
 that will make them better engineers for the future.
     "Our competition focuses on conducting high-quality research on methods to
 reduce snowmobile emissions and sound levels without sacrificing performance."
 Just before the competition began however, Dr. Fussell was asked by an
 environmental group concerned with winter use in Yellowstone National Park to
 use the competition results to make a direct comparison between cars and
 snowmobiles.  "When I saw the quality of the work the students had done, I
 decided to see how their data stacked up."
     It is not surprising to organizers that the snowmobile from Kettering
 University is cleaner than the average car.  The snowmobile features a
 Daihatsu 659cc turbocharged 4-stroke engine.  This engine is used in the
 Dahaitsu Mira, a mini-van that meets strict Japanese 2006 emission standards.
 An added bonus -- the turbocharged engine is priced at just $600, including
 the turbocharger, catalyst, and engine management system.
     Designing a cleaner snowmobile is just one of the objectives of the SAE
 Clean Snowmobile Challenge.  Noise abatement is also an important part of the
 competition.  Highly sensitive audio equipment measured sound levels from this
 year's collegiate entries.  Measurements were taken 50 feet from the road as
 the snowmobiles drove by at full throttle.  The quietest snowmobile this year
 had a high reading of 67dBA.  The ultra-clean Kettering University snowmobile
 hit a high measure of 72dBA on one of its passes.  For perspective, the
 2-stroke control (stock) snowmobile hit 78dBA, a level that is within legal
 limits in National Parks.  The 67dBA reading represents an approximate 75%
 reduction in the noise level from that of the control snowmobile.
     Dr. Fussell and Commissioner Paddleford teamed up to create the SAE Clean
 Snowmobile Challenge in the fall of 1998.  The two Teton County residents saw
 a need for improvements in noise and exhaust emissions from snowmobiles, but
 also recognized the importance of maintaining performance and keeping costs
 down.  Dr. Fussell had participated in SAE Collegiate Design Competitions as
 an engineering student at the University of Tennessee, and the pair came to
 SAE with a proposal to make the Clean Snowmobile Challenge a part of SAE's
 extensive schedule of collegiate events.  SAE Collegiate Design events are now
 held on six continents and host engineering students from over 150
 universities worldwide.
 
 SOURCE  Society of Automotive Engineers