Lesson Notes By Weeks and Term - Senior Secondary 2

Carburetor and air cleaner or filter II

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TERM – 3RD TERM

WEEK TWO

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: AUTO MECHANICAL

Topic: CARBURETOR AND AIR CLEANER OR FILTER II

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Define air cleaners

II.) Identify the types of air cleaners

III.) Identify carburetor faults

IV.) Identify air cleaner faults

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the meaning of air cleaners and discuss the basic types

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher identify and discuss some carburator faults and air cleaner faults

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

CARBURETOR AND AIR CLEANER OR FILTER II

Air Cleaners

Air cleaners, also known as air filters, are components of an engine's intake system designed to remove dirt, dust, and other contaminants from the air entering the engine. Clean air is essential for efficient engine performance and longevity.

Typical Oil bath air cleaner

Types of Air Cleaners

  1. Paper Element Air Filters: These are the most common type, consisting of a pleated paper filter housed in a plastic or metal casing. They effectively trap particles while allowing air to pass through.
  2. Foam Air Filters: Often used in off-road vehicles and small engines, foam filters are washable and reusable. They provide good filtration but may require more frequent cleaning and maintenance.
  3. Oil Bath Air Cleaners: Commonly found in older vehicles, oil bath air cleaners use oil to trap contaminants. They are durable but require periodic maintenance to replenish the oil and clean the filter element.

Carburetor faults and air cleaner faults

Carburetor Faults: Carburetor faults refer to problems or malfunctions that can occur with the carburetor in a vehicle.

  1. Rich Mixture (Too much fuel): This can result in poor fuel economy, black smoke from the exhaust, and rough engine idling. To remedy this, adjusting the carburetor's fuel mixture screws may be necessary.
  2. Lean Mixture (Too little fuel): Symptoms include engine hesitation, rough running, and potential engine damage due to overheating. Remedies may include cleaning or replacing clogged jets or adjusting the carburetor settings.

Air Cleaner Faults:

  1. Clogged Filter: A clogged air filter restricts airflow to the engine, leading to decreased performance, reduced fuel efficiency, and potential engine damage. The remedy is to replace the air filter with a new one.
  2. Dirty Filter Housing: Accumulated dirt and debris in the air filter housing can bypass the filter, contaminating the engine. Regular cleaning of the housing can prevent this issue.
  3. Improper Installation: Incorrect installation of the air cleaner can result in leaks, allowing unfiltered air into the engine. Ensuring proper sealing and installation can prevent this problem.

EVALUATION: 1. What is Air cleaner

  1. Identify the types of air cleaners
  2. Mention 3 carburetor faults and 2 air cleaner faults.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively