1. SMV-FIT1 Super-Mileage Fuel Injection Team - Preliminary Design Review - SDP 2005 Jordan Crafts, Mike Flanagan, Dorinda Garcia, Jim Macdonald October 28 th 2004

2. SMV-FIT2 Background Super-Mileage Vehicle Competition Super-Mileage Vehicle Competition Why Electronic Fuel Injection? Why Electronic Fuel Injection? –Better Fuel Economy –Consistent Engine Performance –Improved Fuel Delivery Control –Adjustability –Data Acquisition

3. SMV-FIT3 Today’s Presentation Background Background Deliverables Deliverables Principles of Operation Principles of Operation System Block Diagram System Block Diagram Synopsis Synopsis MDR Specification MDR Specification

4. SMV-FIT4 Deliverables Working prototype Working prototype A method to tune the prototype A method to tune the prototype Software to view data Software to view data Instruction manual Instruction manual

5. SMV-FIT5 Principles of Operation Atomized Fuel/Air Mixture Atomized Fuel/Air Mixture How do we dispense fuel? How do we dispense fuel? Carburetor - Mechanical Carburetor - Mechanical Injector - Electrical Injector - Electrical

6. SMV-FIT6 Fuel Atomization via Injector A fuel injector is an electronically controlled needle valve which opens a pressurized fuel line – The Windex Bottle Effect A fuel injector is an electronically controlled needle valve which opens a pressurized fuel line – The Windex Bottle Effect Injector Pulse Width is what we want to control Injector Pulse Width is what we want to control Injected Fuel Volume is proportional to the injector pulse width with the flow rate as a constant Injected Fuel Volume is proportional to the injector pulse width with the flow rate as a constant

7. SMV-FIT7 System Block Diagram

8. SMV-FIT8 System Block Diagram

9. SMV-FIT9 Motor The “Plant” we are trying to control The “Plant” we are trying to control Fuel Injector – Primary Actuator of the System Fuel Injector – Primary Actuator of the System Sensors Sensors

10. SMV-FIT10 System Block Diagram

11. SMV-FIT11 Driver Interface and Controller Driver specified Reference Air/Fuel Ratio Driver specified Reference Air/Fuel Ratio Feed-forward Mass-Air Flow Control Feed-forward Mass-Air Flow Control Feed-back Oxygen Sensor Control Feed-back Oxygen Sensor Control Output of Controller is Injector Pulse Width Output of Controller is Injector Pulse Width

12. SMV-FIT12 System Block Diagram

13. SMV-FIT13 Recorder Records Data from Sensor Bus Records Data from Sensor Bus User can select data sources User can select data sources Downloaded serially to PC for display Downloaded serially to PC for display

14. SMV-FIT14 System Block Diagram

15. SMV-FIT15 Power Electronics Alternator uses mechanical energy to keep battery charged Alternator uses mechanical energy to keep battery charged Battery supplies 12V to vehicle ignition and other devices Battery supplies 12V to vehicle ignition and other devices We will need 5V power supply for digital components We will need 5V power supply for digital components May also require special electronics for other devices; i.e. injector or sensors May also require special electronics for other devices; i.e. injector or sensors

16. SMV-FIT16 Synopsis Electronic Fuel Injection Electronic Fuel Injection -Potential Improvement over Carburetion Design Tasks Design Tasks -Feed-forward and Feedback control -Power Electronics -Computer Architecture -Programming

17. SMV-FIT17 Proposed MDR Specification Injector Power Electronics Injector Power Electronics Mounting of Sensors Mounting of Sensors Functional Sensor Output Functional Sensor Output Working Injector Test Program Working Injector Test Program Controlled Injection and Ignition Controlled Injection and Ignition Plant Characterization Plant Characterization

18. SMV-FIT18 Thank you for coming. Any Questions?