Two-stroke gasoline engines

D. Plohberger and co-workers. Development of a Fuel-Injected Two-Stroke Gasoline Engine, SAE 880170, Society of Automotive Engineers, Warrendale, Pa., 1988. 

The tests show that addition of UDD and UDD-based materials to oils and lubricants is multifunctional. The major difficulty impeding the research in this direction is due to the insufficient sedimentation stability of UDD oil suspensions. If and when this problem is solved, a promising application of UDD suspension is its use in motor oil as an additive to fuels for two-stroke gasoline engines. In this case, the additives can improve the lubricating characteristics of fuel and, at the same time, increase its calorific value. RFNC-VNIITF carries out research on the separation of ultradisperse diamond powder into nanometer-range fractions, capable of yielding stable suspensions in various liquids. 

Both gasoline and diesel engines are available in either a two-stroke- or a four-stroke-cycle design. The fundamental difference between the Otto engine cycle (named after Nikolaus Otto, who developed it in 1876) and the diesel engine cycle involves the conditions of the combustion. In the Otto cycle. 

However, with the breaktlirough created for the sake of the two stroke engines in gasoline direct injection, notably by Siemens, or with air injection, (orbital or lAPAC) the 4 stroke lean bum engine is clearly a potential winner for tomorrow s green house engines. Already existing results evidence this forecast. 

I tested the plasma ignition system in my 6.5hp 4-stroke engine with gasoline and propane (didn t test water yet). I used HV pulses from the original ignition coil as trigger or pilot sparks. I had to reverse the polarities of the bridge rectifier, two diodes and the capacitor to get a better pilot spark. The schematic and details are ... 

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