Class 4 (4th Engineer) MEKM 📅 Sep 2025

Exam Question

(a) In modern electronic type 2 stroke main engines which components are replaced by electronic equivalents. (8)

(b) Describe by drawing a simple sketch, fuel injection system on electronic type engine. (6)

Reference Answer

### (a) Components Replaced by Electronic Equivalents in Modern 2-Stroke Engines (8 Marks)
In modern electronically controlled (camshaftless) 2-stroke marine diesel engines, the entire mechanical system for timing and actuation has been replaced by a more precise and flexible electro-hydraulic system. This eliminates numerous components prone to wear and tear, and allows for superior engine performance optimization.
**1. Omitted Mechanical Components:**
Based on the provided reference, the following key mechanical parts are made redundant:

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