Semi-detailed lesson plan in Automotive

I. OBJECTIVES
At the end of the lesson the students should be able to:
a. Identify the different components of brake system
b. Appreciate the importance of brake system

II. SUBJECT MATTER

REFERENCE: Crouse. Anglin automotive mechanics tenth edition (Google)

III. INSTRUCTIONAL MATERIALS:

IV. TEACHING-LEARNING PROCESS

c. Motivation
The teacher will show a video clip about brake system
 B. PRESENTATION
The instructor will go over the parts of the brake system and how they work.

C. LESSON PROPER

COMPONENTS OF BRAKE SYSTEM

• Brake pedal
• Power Brake Booster
Its function is to increase the amount of foot pressure that can be given to the
brake pedal, reducing the amount of foot pressure needed to stop even the largest
vehicle.
• Master Cylinder
The master cylinder, also referred to as the master brake cylinder, feeds
brake fluid into the brake circuit and regulates this in accordance with the mechanical
force to convert the pressure on the brake pedal to hydraulic pressure.
• Brake fluid
An exclusive oil with particular characteristics is brake fluid. It is made to
handle extremely high temperatures without bolling as well as extremely low
temperatures without thickening.
• Brake Lines
Steel tubes and strengthened rubber hoses are used to transport brake fluid
from the master cylinder to the wheels. Only flexible areas, like the front wheels,
which steer and move up and down, necessitate the usage of rubber hoses.
• Proportioning valves- some automobiles with front disc and rear drum
brakes use in the rear brake line.
• Metering valve- In the pipe leading to the front brakes of many cars is a
hold off valve or metering valve.
• Disk Brakes
The main components of a disk brake are the Brake Pads, Rotor, Caliper
 Caliper-
Two Types of caliper
1. Fixed-caliper- possesses one piston on each side of the disc. Some
employ two pistons on each side of four pistons.
2. Floating-caliper- has a single piston that is situated on the disc's inboard
side.
Brake Pads
Each caliper has two brake pads attached to it. They consist of a metal "shoe"
on which the liner is glued or welded. On either side of the rotor, a pad is positioned
in the caliper.
Rotor
The iron disk rotor has precisely machined areas where the brake pads come
into touch with it. The rotor also experiences some wear over time, typically in the
form of ridges and groves where the brake pad rubs against it. This is similar to how
the brake pads degrade over time.

• Drum Brakes
Brake Shoes
Brake shoes are made of a steel shoe with a friction material or lining riveted
or glued to it, just as disk pads. The linings ultimately deteriorate and need to be
replaced, just like disk pads. The braking drum will suffer significant damage if the
linings are allowed to deteriorate to the bare metal shoe.
Backing Plate
They will seriously harm the brake drum when they wear through to the bare
metal shoe. Everything is held together by the backing plate. The wheel cylinder,
brake shoes, and other gear are supported by a solid surface that is attached to the
axle. It rarely results in issues.
Brake Drum
the brake shoes, wheel cylinder, and other hardware. It rarely results in
issues. Iron brake drums have a machined interior surface where the shoes come
into contact. Brake drums, like disk rotors, start to show wear as the brake linings
press up against the drum's machined surface.
• Wheel Cylinder
A cylinder with two pistons—one on each side—makes up the wheel cylinder.
Each piston has a shaft that links it to the brake shoe and a rubber seal. The pistons
are thrust out when brake pressure is applied, bringing the shoes into contact with
the drum. If wheel cylinders exhibit leakage, they need to be refurbished or replaced.
 Return Springs
After the pressure in the wheel cylinder is released, return springs bring the
brake shoes back to their resting position. The linings will prematurely wear out if the
springs are weak and do not fully return the shoes, as they will still be in touch with
the drum.

D. GENERALIZATION
The instructor will wrap up the lesson and highlight the importance of each
component at the conclusion of the discussion.
APPLICATION
The teacher will ask a few students to give a components of brake system
and ask them its function.

IV. EVALUATION
1. Explain brake system.
2. What are the components of break system ?
3. What are the two types of caliper and explain it.

V. ASSIGNMENT
For your assignment, have a research more about brake system. Use any
automotive books or modules for your references.

Prepared by: Arjhydean R. Jalaluddin