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Pressurized Air Vehicle

Pressurized Air Vehicle. Engine Conversion from Combustion to Compressed Air. Project Goals. Ordinary gasoline combustion engine converted to run on compressed air Drivable, proof-of-concept car 5-10 minutes 10-15 mph

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Pressurized Air Vehicle

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  1. Pressurized Air Vehicle Engine Conversion from Combustion to Compressed Air

  2. Project Goals • Ordinary gasoline combustion engine converted to run on compressed air • Drivable, proof-of-concept car • 5-10 minutes • 10-15 mph • Three groups: engine modification, vehicle integration, testing andtheory

  3. Engine and Chassis Choice • Fourstroke engine vs. two stroke engine • Golf cart, go-kart, building a chassis, mini Baja

  4. Engine Modification Chose to modify the timing by CNC machining cam lobes. Norfolk Machine Shop

  5. Remove Timing Case – 5 bolts Place camshaft – line up timing mark Remove old gasket material, and place new gasket Re-attach Timing Case Check all plugs are sealed Add oil Attach intake manifold Engine Assembly

  6. Engine Troubleshooting • Engine running backwards • Intake valve being blown open • Low airflow

  7. Vehicle Integration • Intake Adapter • Tanks • Ball valve (Throttle) • 5/16” Line • Original design too restrictive • Met basic flow requirements after post-install modifications

  8. Scuba Tank Selection • Relatively Light Weight • Available Locally (Low Lead Time) • Price • High Pressure • Common Regulator • Easy Filling • Low Price For Used

  9. Dynamometer Testing • Available at ODU motorsports lab. • Consulted with Dr. Ash about use. • Crank shaft was too large so adapter was machined to allow for use with Baja engine.

  10. Results • Dyno run #1 • 0.1 horsepower at 600 rpm • Dyno run #2 • 0.2 horsepower at 950 rpm

  11. Gas Dynamics Thermo Model • Using ideal gas assumptions • After manipulation:

  12. Engine Efficiency

  13. Comparing Efficiencies [1]N. D. a. J. Deutch, "Hybrid Cars Now, Fuel Cell Cars Later," Science Magazine, vol. 305, pp. 974-976, August 13, 2004 2004. [2]U. S. D. o. Energy. (2013, April 22). Electric Vehicles (EVs). Available: http://www.fueleconomy.gov/feg/evtech.shtml [3]U. S. E. I. Administration. (April 21). Table 8.1. Average Operating Heat Rate for Selected Energy Sources. Available: http:// www.eia.gov/electricity/annual/html/epa_08_01.html

  14. Larger air capacity and flow rate • Better valve and camshaft design • Use a more efficient engine type • Lighter chassis Future Improvements

  15. Completed Engine Conversion • https://www.facebook.com/groups/PAVprojectdesign/?hc_location=stream

  16. Gantt Chart

  17. Questions?

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