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: 6
Grade code: 2.1.2.LI.3
Strand code: 1
Sub-strand code: 2
Content standard code: 2.1.2.CS.1
Indicator code: 2.1.2.LI.3
Theme: AUTOMOTIVE TECHNOLOGY
Subtheme: INTRODUCTION TO VEHICLE TECHNOLOGY
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This lesson introduces the fundamental principles of vehicle suspension systems. In Ghana, we drive on a wide variety of road surfaces, from the smooth George Walker Bush Highway in Accra to bumpy, unpaved roads in our rural communities. The suspension system is the critical link between the car's body and its wheels, responsible for keeping our ride comfortable and safe. Understanding how it works is essential for any student of technology, future driver, or aspiring mechanic. We will explore why a Toyota Hilux pickup truck feels different from a Toyota Vitz and what components make this possible.
This section covers the core knowledge you need to understand vehicle suspension systems. A. What is a Suspension System and What Does It Do?
A vehicle's suspension system is the network of springs, shock absorbers, and linkages that connects a vehicle to its wheels. It has three main jobs: To Support the Vehicle's Weight: The entire weight of the vehicle's body, engine, passengers, and cargo rests on the suspension system. To Provide Ride Comfort: When a wheel hits a pothole or a bump, the suspension absorbs the energy of the impact, preventing the shock from being transferred directly to the passengers. Imagine jumping off a table; you bend your knees to absorb the shock. The suspension is like the vehicle's knees. To Ensure Proper Handling and Safety: The suspension keeps the tyres firmly in contact with the road surface at all times. This is crucial for effective steering, braking, and cornering. If a tyre loses contact with the road, you lose control of the vehicle. B. Main Components of a Suspension System
Every suspension system is built from a few key components working together.
| Component | Diagram/Analogy | Function | Where you'll see it in Ghana | | :--- | :--- | :--- | :--- | | Springs | Like the spring in a pen, but much stronger. | Absorbs the initial shock from bumps and supports the vehicle's weight. They compress and expand to allow the wheel to move up and down. | Coil springs on saloon cars (Toyota Corolla, Hyundai Elantra). Leaf springs on "tro-tros" (Ford Transit), pickups (Toyota Hilux), and cargo trucks (MAN Diesel). | | Dampers (Shock Absorbers) | A hydraulic pump or a bicycle pump filled with oil. | Controls the spring's bouncing. Without a shock absorber, a car would continue to bounce up and down long after hitting a bump. It "dampens" the oscillations, making the ride smooth and controlled. | A cylindrical tube mounted near each spring. Essential on all vehicles. | | Control Arms (or Wishbones) | Like the bones in your arm. | Connects the wheel assembly (knuckle) to the vehicle's frame. They have pivots (bushings) that allow the wheel to move up and down smoothly. | Found in both front and rear suspension systems, especially independent types. | | Ball Joints | Like your shoulder or hip joint. | A flexible ball-and-socket joint that allows the wheel to steer left and right while also moving up and down. Connects the control arms to the steering knuckle. | Critical part of the front suspension on most cars and trucks. | C. Layout of Common Suspension Systems