Class 4 (4th Engineer) MEKM 📅 Aug 2023

Exam Question

(a) With the aid of a block diagram describe the operation of an electronic governor fitted to an auxiliary diesel engine. (8)

(b) An engine fitted with an electronic governor behaves erratically during load changes. Explain the possible causes. (8)

Reference Answer

### (a) Operation of an Electronic Governor
An electronic governor is a closed-loop control system designed to maintain the engine speed at a desired setpoint, irrespective of changes in load. The system continuously measures engine speed, compares it to the set speed, and adjusts the fuel supply to correct any deviation.
The operation is based on the interaction of the following key components, as illustrated in the block diagram:
1. **Speed Sensing Unit (Magnetic Pick-Up - MPU):**

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