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Class 4 (4th Engineer) MEKM 📅 Oct 2024

Exam Question

Indicator cards have shown that one cylinder is high in power although the maximum pressure is low. State the associated effects that this might have on the various instruments of the engine and give a detailed description of the method of rectifying the defect. If this abnormality were not remedied, what might be the subsequent effects on the operation of the engine? State the type of engine to which your answer refers. (16)

Reference Answer

### Engine Type
This answer refers to a large, slow-speed, two-stroke, crosshead marine diesel engine, such as a **Sulzer RTA 58**, which utilizes a cam-driven fuel injection system.
### Analysis of the Defect
The indicator card shows a high power output (large area under the curve, hence high Mean Indicated Pressure - MIP) but a low maximum firing pressure (Pmax). This specific combination is characteristic of two simultaneous faults in the fuel injection system of the affected cylinder:

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