The various MAPEX diagnostics systems already in service with Sulzer diesel engines give many of the necessary condition monitoring functions for such an intelligent engine.
With the Sulzer common rail system, like Fig.2.4.6-2, the functions are separated and given more flexibility. Its particular features are:
・Precise volumetric fuel injection control,
・Variable injection rate shaping,
・Ideally suited for heavy fuel oil,
・Well proven high-efficiency fuel pumps,
・Free selection of injection pressure.
High efficiency fuel pumps feed a high pressure fuel manifold, the Common Rail, arranged at the level of the cylinder covers. The fuel pumps are based on the well-proven design of the jerk-type injection pumps used in the Sulzer ZA40S four stroke engines, and run on a multi-lobe cam to deliver adequate quantities of fuel to the common rail at the usual high pressure ready for injection. Fuel is delivered from the Sulzer common rail to the fuel injection valves through the injection control unit which shows as Fig.2.4.6-3. There is a control unit for each engine cylinder. It regulates the timing of fuel injection, provides control of the volume of fuel injected, and sets the shape of the injection pattern.
