Fuel injected gasoline engines cannot burn diesel fuel because of several reasons.
GASOLINE ENGINE
Computer injected, spark ignited, Low torque: total ignition at or before TDC
DIESEL ENGINE
Mechanical direct injection, Compression ignition, High torque: Prolonged diesel ignition during stroke
Solution to conversion
1)Injection system: Diesel injection pump, 2)Ignition system: Injection line heating to above autoignition, 3)High Torque: Modify injection pump to reduce injection duration at all speeds
Ok, so how can we do this?
Replace spark plugs with diesel injectors, and remove gasoline fuel injectors. Install pulley driven diesel fuel injection pump on the engine and connect fuel lines to the injectors.
So, the fuel will be delivered to each cylinder at TDC as the pump rotates.
How to ignite it?
Heat each injector line to above autoignition temperature with an electric cable heater wrapped around it. This allows cold, low compression air to ignite with fuel already at autoignition temperature. High compression air is not needed.
Now that you are setup how can you make the system create less torque so you don't destroy that gasoline engine block?
Gasoline engines cannot handle the torque levels of a diesel, they wear out very quickly. The source of diesel torque is not the fuel, but the prolonged injection of diesel throughout the power stroke.
Modify a diesel injection pump to a short injection pulse while at slow speed. This normally only happens when the pump is at high speed. If the fuel is injected very quickly rather than in an extended injection down the power stroke, torque will drop. All the while maintaining precise timing of injection and power of the engine.
You could just use a bigger injection pump pulley, but timing of injection will be off.
Now some possible feasibility conditions:
1) heated fuel results in coked(clogged) injector 2) Injector loses lubricity and wears out due to loss of viscosity due to fuel heating 3) Fuel line connection failure due to heat 4) Injection duration is not short enough at low throttle on injection pump which results in engine damaging torque
2007-08-03
21:40:37
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11 answers
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asked by
DH
1