Team Engine Control Jon Stoker Brian Patterson Avishesh Dhakal 1

Project Goals Study the Microsquirt Project. Adapt to Harley Davidson Motorcycles – Injection Timing – Specific Sensors and Signals Design our own EFI Controller Design a convenient connection method Simple End User Customization 2

Microsquirt Electronic Fuel Injection Controller

What is a Microsquirt? Electronic Fuel Injection Controller Derivative of Megasquirt – Compact – Less Driving Current – Suitable for Motorcycles – Snowmobiles – Lawn Mowers Programmable by End User 4

Why use a microsquirt? Optimize Engine Performance – Modify Fuel Maps – Tune injection timing – Adapt engine to add-in sensors – Increase Idle Speed Customize Components – Turbochargers – O 2 Sensors – Different Fuel Types 5

Breakout Board Overview 6

Compilation & Programming Compilation – Windows OS – Embedded code – GCC cross compiler – Cygwin – Downloader program – HCS12 header files 7

Compilation & Programming Programming 1.Connect to a serial port 2.Assert boot pin high 3.Download program 8

Cost Ser. #ItemCost 1.Microsquirt$ Connectors$ PCB-layout board$ PCB-Breakout Board$ Parts from Digikey$ Total Cost$

Board Layout EAGLE Easily Applicable Graphical Layout Editor CadSoft Computer, Inc. Free (non-profit) version has minor resitrictions Schematic to connect on board Each component has physical dimensions 10

Board Layout Layout Specifications Two layer board Two separate ground planes to reduce noise –Analog (High power 7.5A max) –Digital (Sensors, Serial) 1 st version parts on 1 side Standard 20 mil trace –100 mil for MOSFET drain to source –9 mil on microcontroller Total board side 6.3x4” 11

Sample of board layout showing part of microcontroller, high power fets, analog ground plane, digital ground plane, and 35 pin AmpSeal connector. 12

Schedule Course Goals April 23 – Preliminary design review – Team citizenship assignment May 1 – Snapshot poster and display May 9 – Design report, webpage review, logbook collection Project Specific Goals First Semester – Build our Microsquirt board – Program Microsquirt – Advanced/Ahead of schedule goal – connect to motorcycle Second Semester – Stimulator kit – Work out any issues – Run motorcycle 13

First Semester Schedule 14