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Answer :
Final answer:
The common rail pump is used in diesel engines for direct fuel injection into the combustion chamber, delivering fuel at high pressure necessary for ignition and efficient engine operation.
Explanation:
In internal combustion engines, particularly diesel engines, the common rail pump is often employed for the direct injection of fuel into the combustion chamber. This type of pump delivers fuel at the high pressure needed for the efficient operation of the engine. The injection must be precise to maintain the engine’s performance and efficiency, which in diesel engines involves igniting fuel due to high temperatures from adiabatic compression without the need for spark plugs.
During the diesel cycle, air is first drawn into the engine and compressed adiabatically, significantly increasing its temperature. At the appropriate moment, the common rail pump injects fuel directly into the hot, compressed air, spontaneously igniting it. This process drives the power stroke, providing momentum to the engine and ensuring efficient fuel use.
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