Class 4 (4th Engineer) MEKM 📅 Feb 2023

Exam Question

(a) Draw a sectional diagram of cylinder liner of 2-stroke diesel engine, marking each part. What is the material of cylinder liner? (8)

(b) How cooling of liner is achieved satisfactorily (4)

Reference Answer

### (a) Sectional Diagram and Material of Cylinder Liner
A cylinder liner is a critical component within a 2-stroke diesel engine, forming the cylindrical space in which the piston reciprocates. It serves as the running surface for the piston rings and must withstand high pressures, temperatures, and corrosive/abrasive conditions.
**Key Parts of a Cylinder Liner:**
* **Liner Running Surface:** The inner, highly finished surface upon which the piston rings slide. It is typically plateau-honed to create a surface that retains lubricating oil.

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