When petrol is injected into the cylinder after compression stroke or before it ?
*Spark Ignition Engine is Petrol Engine. Here During Suction Stroke “Petrol and Air” mixture is sucked through a carburetor. Then Compresion searts. Just before the end of compression Spark Plug produces a spark and ignites the “Petrol and Air” mixture. And so “Power Stroke”. * Compression Ignition Engine is Diesel Engine. Here there are no carburetors and spark plugs. Air alone is compressed and air temperature is increased. This temperature is enough to ignite the diesel injected Just before the end of compression. And so “Power Stroke”. Petrol Engine – carburetor – Petrol + Air – Suction – Compression – Spark – Power.- Exhaust. Diesel Engine – Air – Suction – Compression – Diesel injection thro’ pump and injector – Power – Exhaust.
