Class 4 (4th Engineer) MEKM 📅 Dec 2023

Exam Question

(a) Draw sectional diagram of exhaust valve of 2 Stroke Diesel Engine. Name the different components of the valve. (8)

(b) Describe working of the valve in operation. How valve rotation occurs during operation and its purpose. (6)

Reference Answer

### (a) Sectional Diagram and Components of a 2-Stroke Diesel Engine Exhaust Valve
A detailed sectional diagram is required to illustrate the arrangement of a modern, hydraulically actuated, air-spring-assisted exhaust valve as found on large two-stroke marine diesel engines.
**Key Components:**
1. **Valve Cage/Housing:** The main body that houses all the components and is fitted into the cylinder head. It contains cooling water passages (not shown in all diagrams, but essential).

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