University of New Hampshire Clean Snowmobile Challenge 2006

Overview n n n n n Target market Power plant selection Drive train Power output Emission reductions Noise reductions Costs Estimated retail costs Conclusion

Target Market n n Recreational enthusiasts Rider priorities n n n Performance Environmental considerations Noise reduction

Power Plant Selection n CBR 600 F 4 i n n n Four stroke (lower emissions) Four cylinder, liquid cooled Throttle body fuel injection Exhaust air injection 3 -D ignition mapping High revving

Drive Train n Internal gear reductions n Off crank n n Transmission modifications n n n . 8: 1 External gear drive Final gear ratio: 1. 45: 1 n n 1. 822: 1 Output shaft RPM Jack shaft

Power Output n 123 hp, 72 ft-lbs @ 8950 RPM (clutch)

Reduced Emissions n n Four stroke Low emissions California model CBR 600 F 4 i with catalytic converter Exhaust air injection Engine/exhaust system passes 2004 CARB emissions standards

Noise Reduction n Under hood sound insulation (Accumat) Under seat exhaust Stock CBR 600 silencer, 80 d. B rating n n Designed specifically for motor Fiber Frax exhaust insulation

Costs

Estimated Retail Cost n n n Late model chassis: ~ $4000 CBR 600 F 4 i motor: ~ $2000 Hardware: ~ $188 Exhaust: ~$550 Total production cost: ~ $6738

Conclusions n Produced high performance machine n n n Fast acceleration 90+ mph top speed Lower emissions than standard 2 stroke Smoke free Majority of time spent integrating motor into chassis

Questions