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Published byChristal Barber Modified over 9 years ago
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Engine Conversion from Combustion to Compressed Air
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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 and theory
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Four stroke engine vs. two stroke engine Golf cart, go-kart, building a chassis, mini Baja
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Chose to modify the timing by CNC machining cam lobes. Norfolk Machine Shop
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1. Remove Timing Case – 5 bolts 2. Place camshaft – line up timing mark 3. Remove old gasket material, and place new gasket 4. Re-attach Timing Case 5. Check all plugs are sealed 6. Add oil 7. Attach intake manifold Engine Assembly
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Engine running backwards Intake valve being blown open Low airflow
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Intake Adapter Tanks Ball valve (Throttle) 5/16” Line Original design too restrictive Met basic flow requirements after post-install modifications
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Relatively Light Weight Available Locally (Low Lead Time) Price High Pressure Common Regulator Easy Filling Low Price For Used
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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.
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Dyno run #1 0.1 horsepower at 600 rpm Dyno run #2 0.2 horsepower at 950 rpm
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Internal Combustion [1]Hybrid [1]Electric [2]Pressurized Air Engine Efficiency,% 213011 Motor Efficiency, % 7978 Battery & Battery Charger Efficiency, % 81 Total Efficiency, % 2124214 Heat Rate, Btu/kWhEfficiency, % Coal 1044432.67 Petroleum 1082631.52 Natural Gas 815241.85 Nuclear 1046432.61 [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
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Larger air capacity and flow rate Better valve and camshaft design Use a more efficient engine type Lighter chassis
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