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Team Engine Control Jon Stoker Brian Patterson Avishesh Dhakal

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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

MicrosquirtElectronic Fuel Injection Controller

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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

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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– O2 Sensors– Different Fuel Types

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Breakout Board Overview

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

Compilation & Programming• Programming

1. Connect to a serial port2. Assert boot pin high3. Download program

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CostSer. # Item Cost

1. Microsquirt $400.00

2. Connectors $100.00

3. PCB-layout board $83.00

4. PCB-Breakout Board $83.00

5. Parts from Digikey $120.00

Total Cost $786.00

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Board LayoutEAGLE

• 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

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Board Layout

Layout Specifications• Two layer board• Two separate ground planes to reduce noise

– Analog (High power 7.5A max)– Digital (Sensors , Serial)

• 1st 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”

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

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First Semester Schedule

Secondary Research (Engine)

Secondary Research (Microsquirt)

Preliminary Problem Definition

Preliminary Web Page

Schematic

Break

Board Layout

Detailed Problem Definition

Detailed Schedule

Conceptual Generation

Board Testing

Design Review

Snapshot

Design Report

Web Page

Logbook

Programming

Connect to Motorcycle

1/27 2/27 3/30 4/302/5

2/5

2/5

2/5

2/19

3/23

3/23

3/23

3/23

4/30

3/23

4/23

4/23

3/12

2/5

5/1

5/1

68

68

35

35

22

22

22

22

22

0

22

0

0

33

68

0

0

16

16

0

0

0

9

12

0

0

9

9

8

16

25

25

8

8

Start Date Completed Remaining 14