Engine Room Simulator Training

Early Injection – Major Faults in Main Engine (MC90V) Series

Type of engine: MAN B&W MC90V (VLCC)

Table of Contents

    Fault: Early Injection Timing

    M/E Turbocharger System diagram
    M/E Turbocharger System
    ME Cylinder no-1 diagram with parameters (Faulty unit)
    M/E Unit no-01
    ME Cylinder no-2 diagram with parameters (Without fault)
    M/E Unit no-02
    ME Piston RIng Monitor Diagram (Unit no-1)
    Piston ring condition unit-1
    ME Piston RIng Monitor Diagram (Unit no-2)
    Piston ring condition unit-2
    Cylinder Indicator Diagram – Pressure/Angle

    Cylinder no-1 -> Pink (abnormal)

    Cylinder no 2 -> Blue (normal)

    Indicator Card (Pressure/Angle)
    Action and Remarks:
    Sample report and analysis report. Click the button to download it.Download
    Parameter Analysis:
    Parameters Analysis
    Conclusion:

    Based on the above parameters,

    All scavenge air supply system parameters are normal and hence no scavenge problem.

    The mechanical system is in good working order and hence airtight integrity of the combustion space is intact & no problem with a mechanical system. Based on the fuel oil system parameters, main engine no-01-unit, exhaust temperature dropped to 312° C, Pmax increased to 133.1, TINJO is advanced to -4.0° C. TIGN is also advanced to 3.6° C. Fuel pump flow rate is same, PINJM & PINJO is almost same So, from above the most probable cause would be fuel pump early injection as the timing is advanced.

    shafi
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