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Waste Vegetable Oil Powered Diesel Engine

Waste Vegetable Oil Powered Diesel Engine . Max Sluiter - Andrew Del Prete - Travis Nicholas. Final Design Review for Cal Poly EE 470/471 Alternative Vehicle Fuels For A Sustainable Future Professor Art MacCarley 12 March 2013. Overview. Convert a diesel engine to run on two fuels

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Waste Vegetable Oil Powered Diesel Engine

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  1. Waste Vegetable Oil Powered Diesel Engine Max Sluiter - Andrew Del Prete - Travis Nicholas Final Design Review for Cal Poly EE 470/471Alternative Vehicle Fuels For A Sustainable Future Professor Art MacCarley 12 March 2013

  2. Overview • Convert a diesel engine to run on two fuels • Standard diesel fuel • Waste Vegetable Oil (WVO) • WVO vs. diesel • Similar energy density • Similar cetane rating • Waste cooking oil avoids food vs. fuel issue of virgin VO • VO is renewable, diesel is not • NOT similar viscosity! (at common outdoor temperatures)

  3. Gantt Chart Actual Planned

  4. Specifications • Heated WVO fuel • In filter and lines • Switch fuels • Select which fuel with engine running • 2 separate fuel tanks • Multiple fuel supply and return lines • Separate fuel filters • 3-port valves • Transparent Tygon lines • Engine • ISUZU 4FBI 4-cyl diesel non-turbo • No fancy emissions/electronic equipment as modern diesels employ

  5. Fuel System Schematic Return Coolant Electric Fuel Pump Racor Fuel Filter WVO Tank 3 Port Valve Diesel Fuel Filter Supply Coolant Diesel Tank Injection Pump 3 Port Valve Engine

  6. Heated Fuel Lines hot engine coolant flow heater hose hose barb hot engine coolant flow WVO flow hose barb brass tee AL fuel tube WVO flow heater hose comp. fitting

  7. Two Fuel System • Modify existing stand to hold two tanks • Manual 3 port valves • WVO Tank • Install bulkhead fittings • Manual shutoff valves

  8. WVO Filtering • Massive Parker/Racor R120S 2-micron filter and water separator • Electrically powered heated filter wrap (not shown) • Largest portion of budget (about half) spent on filter alone

  9. Unexpected Problems • Bad Engine Knock! • Injection timing way off • Rotate injection pump to retard timing • Dyno overloading the engine • Fuel leaks • Drill out ID of compression fittings • Water leaks at the dyno

  10. Fixing the Problems • Tightening all fuel fittings fixed the leaks • New hoses for the dyno helps keep water spillage to a minimum • Load does not go away unless dyno is run with little to no water in it • Not good for dyno • Ran engine on WVO on Sunday and dyno seemed better for a while • Engine revved more on WVO • When purging, dyno water level was not dropping with exit valve open all the way- ????

  11. Results • Engine ran on WVO for the first time on Sunday. • Ran smoothly, revved, and produced same or more power than on diesel • Smelled much better on WVO than diesel • Inability to rev (due to dyno load) made it take a long time for the engine to warm up enough to switch to WVO (>140 F)

  12. Tuning • Fuel injection pump had been internally modified for double fueling (for DME) • Tried to turn down the screw controlling fuel flow but this caused rough running • Some combination of pump timing, full-load screw, and idle screw will be necessary to get the engine to run well without smoking • But... rich means less NOx

  13. Parts and Expenditures

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