Common rail

Common rail is like a train that carries fuel to a bunch of different places. The train is called the fuel rail and it holds all the fuel that the engine needs to run. The fuel doesn't move until the engine asks for it. When the engine wants some fuel, it sends a signal to the train and asks for a certain amount. The train then delivers the fuel where it needs to go, like to the engine cylinders. This way, the engine gets just the right amount of fuel it needs and can run smoothly. Common rail technology is used in diesel engines, which are like big and strong trucks that carry heavy loads long distances.