Originally, the first two prototypes were powered by a spark ignition engine, named the SOFAM 12 GSds.
12.
Like the General Motors Dura-Spark ignition module.
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The engine was the Maybach HL295 12-cylinder of 29.5 litres, using fuel injection combined with spark ignition.
14.
It is the first spark ignition engine for automotive use with direct injection of fuel into the cylinder.
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Gasoline ( spark ignition ) versions are particularly useful in lightweight or portable applications such as chainsaws and motorcycles.
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Extreme temperatures will cause detonation of the fuel-air mixture ( spark ignition engines ) and damage to the engine.
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For example, gas ranges with an automatic spark ignition system are 30 percent more efficient than ones with pilot lights.
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HCCI engines have a long history, even though HCCI has not been as widely implemented as spark ignition or diesel injection.
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There's a growing usage of renewable fuels like biodiesel for compression ignition engines and bioethanol or methanol for spark ignition engines.
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Premium grade, 91-octane or better gasoline is recommended, although an adaptive spark ignition system allows the engine to accept regular grade gasoline.
