Group 9A: Jerry Dutreuil Joshua Guerra Matt Grywalski William Mehnert

Overview Project Objectives Phase Overview –Phase 1 –Phase 2 Bill of Materials Component Overview Software Flow Chart Program Logic Test Bed Nugget Chart Conclusion

Project Objective Convert a gasoline engine to operate on E85 without sacrificing fuel consumption, increasing performance and reducing emissions Provide a control system unit to manage the engine

Phase 1 Overview Evaluation of design approaches (different engines) Research of existing products Ignition timing is most important aspect of performance

Phase 2 Overview Areas of Technical Analysis –Ignition Timing –Explosion Limits –Emissions –Power/Torque

Bill of Materials Total = $3, ComponentFromPriceFunction Megasquirt (ECM)DIYAutotune.com$436Engine Control Exhaust temperaturelethaldiesel.com$78Timing Control Oxygen SensorSummitracing.com$200Air/Fuel Ratio Control Flex Fuel SensorGmpartsdirect.com$363Fuel Composition Fuel InjectorSummitracing.com$250Fuel adjustments EngineE-bay or other used parts market place $1200Testing DynamometerLocal performance shop$80/testTesting EmissionsLocal testing center$80/testTesting E85 FuelClosest E85 Station$2.75/GallonFuel Misc Sensors and Circuits Mouser.com or Digikey.com$165Control Circuits *Prices do not include taxes and shipping fees.

Component Overview Megasquirt – Standalone ECM –Allows for full programmability and control of all engine parameters –Allows for development of control algorithms

Component Overview EGT Sensor –Detects exhaust gas temperature (Chamber temperature) Oxygen Sensor, wideband -Detects air/fuel ratio

Component Overview Flex Fuel Sensor –Detects ethanol content in the fuel

Software Flow Chart ECM Exhaust Gases FFSFuel InjectorsIgnitionO2EGT

Program Logic Read FFS to determine ethanol content –Trim fuel table and timing table to compensate Read Oxygen Sensor –Trim fuel values to bring values back to stoichiometric or towards desired target Read EGT sensor –Trim timing values to adjust EGT temperatures to acceptable range and reduce emissions. Check throttle position –Adjust timing and fuel lookup tables to create power as demanded.

Test Bed Track of dyno – 24”-96” –Track of current SAE car - ~62” –Used to tune vehicle for power, torque, and emissions 5 Gas emissions testing

Nugget Chart

Conclusion With ignition timing, we will control the combustion in the cylinder chamber We will provide a kit that will enable someone to run on E85/gasoline blend The testing will consist of two identical runs; one with gasoline and one with E85 The results will be directly compared to determine to the differences in the theoretical values vs. the actual values.

Thank you Any Questions?

Reference Effect of Advanced injection timing on emission characteristics of diesel engine running on natural gas Effect of Ethanol-gasoline blends on engine performance and exhaust emissions in different compression ratio The effects of ethanol-unleaded gasoline blends and ignition timing on engine performance and exhaust emissions

Chemical Equilibrium Gasoline –C 8 H (O N 2 )  CO 2 +3H 2 O+12.5(3.76N 2 ) Ethanol –C 2 H 5 OH+3(O N 2 )  2CO 2 +3H 2 O+3(3.76N 2 )

Formulas Used