TERM – 3RD TERM
WEEK FIVE
Class: Senior Secondary School 1
Age: 15 years
Duration: 40 minutes of 5 periods each
Date:
Subject: AUTO MECHANICAL
Topic: FUEL SYSTEM
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
I.) Define fueling system
II.) Mention the types of fuel
III.) Discuss the working principles of fuel system.
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
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PRESENTATION
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TEACHER’S ACTIVITY
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STUDENT’S
ACTIVITY
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STEP 1
INTRODUCTION
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The teacher explains the meaning of fuel system and identify the types of fuels
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Students listens attentively to the teacher
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STEP 2
EXPLANATION
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Teacher explain the working principles of fueling system.
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Students exhibit attentiveness and active engagement
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STEP 3
NOTE TAKING
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The teacher writes a summarized
note on the board
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The students
copy the note in
their books
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NOTE
FUEL SYSTEM
A fuel system in a vehicle is a mechanism designed to store, deliver, and manage the fuel required for the operation of the engine. It consists of components such as the fuel tank, fuel pump, fuel filter, fuel injectors (or carburetor), fuel lines, and fuel pressure regulator.
Types of Fuel
- Petrol (Gasoline): Petrol is a liquid fuel derived from crude oil and primarily used in spark-ignition internal combustion engines. It is highly volatile and combustible, making it suitable for gasoline engines found in most passenger cars and motorcycles.
- Diesel: Diesel is a liquid fuel derived from crude oil and commonly used in compression-ignition internal combustion engines. It has a higher energy density and lower volatility than petrol, making it more suitable for diesel engines found in trucks, buses, and some passenger vehicles.
- Paraffin (Kerosene): Paraffin, also known as kerosene, is a liquid fuel derived from crude oil and used in certain types of engines, heaters, lamps, and stoves. It has a lower energy density than petrol or diesel and is typically less refined.
- LPG (Liquefied Petroleum Gas): LPG is a mixture of hydrocarbon gases, primarily propane and butane, that is compressed into a liquid form for storage and transportation. It is used as an alternative fuel for vehicles equipped with LPG conversion kits.
Working Principle of a Fuel System
- Fuel Storage: The fuel system begins with the fuel tank, where the fuel is stored until needed by the engine. The tank may have a fuel gauge to indicate the fuel level to the driver.
- Fuel Delivery: When the engine requires fuel, the fuel pump draws fuel from the tank and delivers it to the engine at the correct pressure. In modern vehicles, the fuel pump is typically electrically powered and located inside the fuel tank.
- Fuel Filtration: Before reaching the engine, the fuel passes through a fuel filter to remove any contaminants or impurities that could potentially damage the engine or fuel system components.
- Fuel Injection (or Carburetion): In fuel-injected engines, fuel is delivered directly to the engine cylinders through fuel injectors, where it is mixed with air and ignited for combustion.
- Fuel Regulation: The fuel pressure regulator maintains a consistent fuel pressure within the fuel system to ensure proper fuel delivery and engine performance under various operating conditions.
EVALUATION: 1. What is a Fuel system?
- Mention 4 types of fuel system
- Discuss the working principles of a fuel system
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively
