Common rail system
Fuel under high pressure is stored in the common rail and uniformly supplied to each fuel injector. Injecting the fuel under higher pressures enables the engine to have more complete combustion, which reduces the creation of PM. At the same time, the use of multiple fuel injectors helps to prevent excessively high temperatures in the combustion chamber, thereby reducing the creation of NOx. The key to the common rail system is the precise electronic control of the fuel injection pressure, injection timing, the number of injections and the amount of fuel injected.