Direct Injection

Reduced Emissions

Improved Efficiency

Presented By:

Andrew Findlay

Russell Schiermeier

Compared to a typical trail snowmobile:

Reduce HC, CO, and NOx

Emissions Minimize Sound

Production Improve Fuel Efficiency Maintain Performance

and Reliability

                      

UI first participated in the CSC in 2001: the second year of the competition

That year’s team mated a sno-cross chassis to a 750 cc four-stroke BMW motorcycle engine

Multiple wins: 2002 and 2003 Four-strokes are already a

commercially available solution

Does not meet the needs of many consumers

                      

Direct Injection Chassis Modifications

Adapt E-Tec Injectors to Polaris 600 engine

Design head for optimum piston chamber geometry

Implement power and control systems

Use sound absorbing and vibration damping materials to reduce noise output

Install direct drive to increase efficiency and decrease weight

Clean, quiet two-stroke

Preserving the right to ride in sensitive areas with new technology by improving the two-stroke engine

Less pollution Increased gas mileage

Reduced cost for the outfitter Increased range or lighter weight with smaller gas tank

Maintains stock power and handling characteristics Minimal cost over production snowmobile

E-Tec© low-pressure fuel injectors More efficient than high-

pressure air or fuel

Cylinder head

Combustion chamber with steep walls

MoTec M4 ECU and custom injector control system

55V power source

Injector

Spark Plug

Combustion Chamber

HC +NOx comparison for the UICSC GDI and the stock carbureted two-stroke

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Mode

HC

+N

Ox

(gr/

kW-h

r)

UICSC GDI

Stock Engine

CO emissions comparison between the UICSC GDI and the stock carbureted two-stroke

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Mode

CO

(g

r/kW

-hr)

UICSC GDI

Stock Engine

Taken in December, 2004

74% less HC + NOx and 41% less CO (5 mode weighted average) without a catalyst.

Displayed areas tuning was needed most.

Injector Head Spark Plug Fuel Cone Piston Cylinder Port

Geometry Cooling passages

Squish Area

Dome Angle

Improved near nozzle geometry

Spark plug location

Stock cooling passage geometry

Dome Radius

‘05

Squish Reduction

Near nozzle geometry Improvement

Shorter chamber

‘04

Cost of Implementation

Less than $200 difference between stock and cost of implementing direct injection technology due to injectors, fuel pump and ECU

Technology is used in the outboard industry whose standards are stricter than EPA standards for snowmobiles

Packaging

Improve the look of a stock production snowmobile

Packaging power source inside stock housing eliminates need for external alternator or battery

Lightest weight at this years competition

Continued production of two-stroke engine Meeting the customer demand of the two-

stroke power-to-weight ratio Meeting emission standards Minimize implementation cost by using

currently available technology

Summary

Direct-Injection solves many of current problems– Improves fuel efficiency– Reduces pollution emissions– Maintains stock power-to-weight ratio and

handling– Feasible solution that is realistic

Thank You!Questions?