Common Rail is a fuel injection system used in diesel engines. It allows for multiple injections of fuel into the combustion chamber at high pressure, improving efficiency and reducing emissions. This system uses a shared fuel rail that supplies fuel to all injectors, enabling precise control over the timing and amount of fuel injected. The Common Rail system enhances engine performance by optimizing combustion. It helps in achieving better fuel atomization, leading to smoother operation and lower noise levels. This technology is widely used in modern vehicles, contributing to cleaner and more efficient diesel engines, such as those found in automobiles and trucks.