CommonRailDieselsysteme

Common Rail Diesel Systeme, often abbreviated as CRDi or CDI, represents a significant advancement in diesel engine technology. It is a fuel injection system that injects fuel into the combustion chamber at extremely high pressures. Unlike older diesel systems, where the injection pressure was generated by the engine's speed and load, common rail systems utilize a high-pressure pump to maintain a constant pressure in a central fuel rail, the "common rail," which supplies all injectors. Electronically controlled injectors then precisely meter and deliver fuel into each cylinder based on engine requirements. This precise control allows for multiple injection events per combustion cycle, leading to improved fuel efficiency, reduced emissions, and quieter engine operation. The system consists of a high-pressure pump, the common rail itself, and electronically actuated injectors. Sensors monitor various engine parameters, such as engine speed, throttle position, and exhaust gas temperature, feeding this data to the engine control unit (ECU). The ECU then calculates the optimal amount and timing of fuel injection for each cylinder, adjusting the injector pulse width and opening time. This sophisticated control mechanism is key to the benefits of common rail technology.