Lesson Notes By Weeks and Term v4 - SHS 2
INTRODUCTION TO ENGINE TECHNOLOGY
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INTRODUCTION TO ENGINE TECHNOLOGY
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Subject: Applied Technology
Class: SHS 2
Term: 1st Term
Week: 3
Grade code: 2.1.1.LI.6
Strand code: 1
Sub-strand code: 1
Content standard code: 2.1.1.CS.1
Indicator code: 2.1.1.LI.6
Theme: AUTOMOTIVE TECHNOLOGY
Subtheme: INTRODUCTION TO ENGINE TECHNOLOGY
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Welcome, students! Today, we are diving into one of the most critical topics for keeping any engine alive: lubrication. Think about the thousands of cars, tro-tros, and okadas on our roads in Ghana, or the generators we use during power outages ("dumsor"). The lifeblood of their engines is the oil flowing through them. Using the wrong oil or neglecting it can destroy an engine, costing thousands of cedis to repair. This lesson will empower you to understand engine oil like a professional mechanic, enabling you to make informed decisions about vehicle maintenance for yourself, your family, or in your future careers.
A. Introduction to Engine Lubrication
An engine has many fast-moving metal parts that rub against each other (e.g., pistons in cylinders, crankshaft on bearings). Without lubrication, the friction would create intense heat, causing the parts to wear out quickly and eventually seize (weld together).
Engine Lubricating Oil is a specialized substance introduced between these moving parts to: Reduce friction. Cool the engine parts. Clean the inside of the engine. Seal the gap between the piston rings and cylinder walls. Protect against rust and corrosion.
B. Properties of Engine Lubricating Oil