Clean ICE

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Clean ICE

• Advisor Dr. ZieherMembers Hai Chang, Kyle
  Roosevelt

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Project Description

• Hydrogen Internal Combustion Engine
• A small gasoline motor is converted to run on H2
  and O2. The motor is controlled by an MSP430 and
  it is mounted in a cage for safety. The exhaust
  of the motor is theoretically clean, only water
  vapor.

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Project Goals

• Get the engine running better
• Build on previous work
• Improve engine control software
• Make power measurements
• Improve engine power and performance through
  experimentation

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Accomplishments

• Reproduced old results
• Relocated the injector board
• Mounted generator to engine
• Coupled the shafts with a flexible coupling
• Modified heat lamp array to work as a variable
  load
• Added safety cage extension
• Added Hardware to measure load current and
  voltage
• Added Temperature sensor

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Accomplishments

• Added data logging function to Labview
• Added code for MSP to measure load and sense
  voltages
• Added additional code for serial communication of
  voltage measurements
• Expanded LabView functionality to calculate
  horsepower and torque
• Made Matlab code to graph results from logged data

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Relocated The Injector Board
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Injector Board Box
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Variable Resistor Specification

• Array of ceramic heat lamp
• The resistance across each lamp at room temp is
  28.5 Ohms
• Each row has a switch to turn it On/Off

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Shaft Alignment

• X A B
• A L1 d1/2
• B L2 d2/2
• Where d1 5/8 (in) and d2 7/8 (in)

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Lab Measurements
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• A 4.1365 (in)
• B 3.5170 (in)
• X A B 0.6195 (in)

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Shaft Coupling

• From Grainger
• Compatible with both shaft sizes
• Engine 5/8
• Generator 7/8
• Rubber insert provides a weak point in case of
  overload

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Mounted Motor
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Enhanced Safety Cage
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Voltage Measurement Schematic
10k
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Sense Resistor Voltage Divider
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Thermal Coupler

• Specs
• It will provide accurate surface temperature
  measurements from 40 to 500 deg. F.
• Maximum temperature of insulation is 500 deg

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Software


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System Block Diagram
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MSP code

• Inputs
• Crankshaft Angle
• LabView values for ignition and injection timings
  and pulse widths
• Outputs
• Hydrogen and Oxygen Injectors
• Ignition Coil
• RPM, Load and sense voltage to LabView

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Changes to MSP code

• Setup A to D converter for Load and Sense voltage
  measurement
• Problems
• AVss was not grounded
• 12 bit to 8 bit conversion was incorrect
• Added additional parts to serial port transmit
  interrupt
• Load Voltage
• Sense Voltage
• 2 extra values for future use

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Serial Port Interface

• LabView initiates transfer by writing values to
  the MSP serial port buffer
• Identifier (gt245)
• Data Value (lt245)
• Termination Character (245)
• MSP executes interrupt when receive buffer fills
• If RXBUF gt 245 RXBUF Identifier
• If RXBUF lt 245 RXBUF Data Value
• If RXBUF 245 Execute switch statement

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LabView Identifiers
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Front Panel Version 7
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Data Logging

• Record Engine parameters (6)
• RPM
• Ignition timing
• Hydrogen injection timing
• Hydrogen injection pulse width
• Oxygen injection timing
• Oxygen injection pulse width
• All 6 parameters are recorded at 1 sample/second
• The log captures values returned from the MSP-not
  from the LabView front panel

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Manual Recorded Data
Power Measurement Engine ran at 40psi(Nov,11
2004)
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Except from Datalog
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Test 9
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Test 10
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Test 11
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Budget
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Gantt Chart
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References

• 1. www.grainger.com
• 2. www.sears.com
• 3. Roosevelt/Burkhalter. Final Presentation.
  April 2004

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Questions?