At what pressure does the diesel engine inject diesel into the cylinder for combustion and explosion?

The correct answer is high pressure, as diesel engines operate using a fuel injection system that requires diesel fuel to be injected into the combustion chamber at a very high pressure. This high pressure is essential for the atomization of the fuel, allowing it to mix efficiently with the incoming air within the cylinder.

When the diesel fuel is injected at high pressure, it forms a fine mist that ignites due to the high temperature and pressure conditions present in the cylinder. This process is critical for achieving adequate combustion, which in turn generates the power needed to drive the engine. If the injection pressure were low, the fuel would not atomize properly and would result in incomplete combustion, leading to reduced engine efficiency and increased emissions.

Therefore, understanding the role of high pressure in the fuel injection process is crucial in the functioning of diesel engines and contributes significantly to their performance.