Lesson Notes By Weeks and Term v4 - SHS 2
INTRODUCTION TO VEHICLE TECHNOLOGY
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INTRODUCTION TO VEHICLE TECHNOLOGY
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Applied Technology
Class: SHS 2
Term: 1st Term
Week: 8
Grade code: 2.1.2.LI.5
Strand code: 1
Sub-strand code: 2
Content standard code: 2.1.2.CS.1
Indicator code: 2.1.2.LI.5
Theme: AUTOMOTIVE TECHNOLOGY
Subtheme: INTRODUCTION TO VEHICLE TECHNOLOGY
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This lesson introduces the concept of independent suspension systems in vehicles. We will explore why suspension is crucial for a safe and comfortable ride, especially on the varied road conditions we experience in Ghana, from smooth highways to bumpy urban roads and untarred paths. We will focus on two of the most common types of independent front suspension: the Double Wishbone and the Macpherson Strut. Understanding these systems is fundamental for anyone interested in how cars work, vehicle maintenance, and automotive engineering.
A. What is a Suspension System?
A vehicle's suspension system is the network of springs, shock absorbers, and linkages that connects the vehicle to its wheels. It has two main jobs: Passenger Comfort: To absorb shocks and vibrations from bumps, potholes ("gallops"), and uneven road surfaces, so the ride feels smooth for the people inside. Imagine riding a bicycle with no suspension on a rough road – you feel every single bump! Vehicle Handling and Safety: To keep the tyres in firm contact with the road at all times. This is critical for steering, braking, and maintaining control, especially when turning or driving on a slippery surface. B. What does "Independent Suspension" Mean?
In an independent suspension system, the suspension for each wheel on an axle is separate. This means that when one wheel hits a bump, it can move up and down on its own without directly affecting the opposite wheel. Analogy: Imagine two people walking side-by-side. If one person steps into a small pothole, they can bend their knee to absorb the shock without causing the other person to stumble. This is like independent suspension. Contrast (Dependent/Solid Axle Suspension): Now, imagine those same two people standing on a single, solid wooden plank. If one side of the plank is lifted by a bump, the entire plank tilts, and the other person is also lifted and tilted. This is like a dependent (solid axle) suspension, often found on the rear of heavy-duty trucks and some older cars.
Independent suspension provides better ride quality and handling because each wheel can react to the road surface individually. C. Type 1: The Double Wishbone Suspension (or Double A-Arm)