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University of Waterloo 2014 Clean Snowmobile

University of Waterloo 2014 Clean Snowmobile. Strategy. Four-stroke engine Weber MPE 750 Turbo (2 cyl) Lightweight cross-country chassis Better control = less need to decelerate and accelerate 2012 Polaris Rush Inexpensive Weight Reductions Lithium Iron Phosphate Battery Aluminum Muffler

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University of Waterloo 2014 Clean Snowmobile

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  1. University of Waterloo2014 Clean Snowmobile

  2. Strategy • Four-stroke engine • Weber MPE 750 Turbo (2 cyl) • Lightweight cross-country chassis • Better control = less need to decelerate and accelerate • 2012 Polaris Rush • Inexpensive Weight Reductions • Lithium Iron Phosphate Battery • Aluminum Muffler • Improved traction and reduced drivetrain losses • Prestudded track (Camoplast ICE Attak XT) • Large diameter rear idler wheels • Part of a long term plan • Stay tuned for next year

  3. Engine Selection • Weber MPE 750 Turbo • 2 cylinder • 750 cc • Four stroke • Turbo charged snowmobile.com

  4. Click to add text Click to add text Chassis Selection Click to add text • 2012 Polaris Rush • Easy to service • Good handling • Fairly lightweight • Added bonus: free • (Thanks Polaris!) Polaris

  5. Modifications

  6. Lithium Iron Phosphate Battery • Antigravity • 12 cell • small volume • Weight < 2 lbs • 360 cold cranking amps Antigravity Batteries

  7. 3 Way Caesium Catalytic Converter • Operator perspective: clear conscience • Dealer/rental: environmental appeal as a selling point • Environmental: targets CO, HC and NOx

  8. Muffler • Single element re-entrant diffuser • Aluminum construction • Weight < 5 lbs • Targets 6500 rpm • (on a 3-cyl)

  9. Track • Camoplast Ice Attak XT • Pre-studded • 1.22" lug profile • Traction and stability allows rider to maintain speed - less fuel burned from excessive need to accelerate and decelerate • Added traction can contribute to safety

  10. 8" rear wheels • Larger rear wheels • Offset axle • Less dynamic track deformation • Lower bearing speed

  11. Next steps • Reduce track noise • Means of reducing pumping losses (stay tuned!) • EGR? • More exotic means... • Refine fuel map and load calculation strategy • Consistency of load state calculation • Weight reduction • New muffler design • integrated catalyst

  12. Thank you! Questions? sled.uwaterloo.ca uwsled@gmail.com

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