Labels:bulletin board | reckoner | sky OCR: GAS ENGINE DISCUSSION The engine is more correctly called the spark ignition or S.I. engine because the burning of the fuel air mixture drawn into the cylinder is initiated by spark which occurs about the top of compression stroke. The exact timing depends on several factors including the engine speed throttle setting, fuel al ratio pue temperature name few spark ignites the ue ar mixture flame front then propagates rapidly pue) silently) across the combusi tion chamber heating the a0d thereby raising the pressure in the cylinder The efficiency pue maximum power output of an internal combustion engine are fundamentally limited bu the compression ratio Unfortunately, if the compression ratio of gas engine raised too much the fuel air mixture will ignite during compression resulting T power ...
