Lesson 3

Learning objectives:

Within the lesson, the students are expected to:

a. Learn the different parts and functions of the engine system.

b. Determine the different parts of the engine through ; and

c. Interpret what they learned about the engine system through a mind map.

Subject Matter

Topic: Engine Systems

Materials

Skills: Reports and Media

Mode of Delivery: Online class using Google Meet

Time Allotment: 2days/ 180 minutes (one week)

High Technology: short video clips, online teaching platforms (Google Form)

reference:

https://automotivemechanics.wordpress.com/tag/engine-systems/

A. Pre-Activity

1. Prayer

2. Checking of Attendance

3. Review

4. Setting of Standards

Activity 1:

• The teacher will ask the following questions to the class.

1. What type of transportation do you typically use when you go out?

2. What do you think is the best transportation ever made in human history?

3. What makes these types of transportation function to help us with our everyday lives?

B. Lesson proper

• Discussion will be done on google meet

Instructions:

• The students must follow the instructions presented by the teacher.

• The Students must answer the provided quiz after the lectures for extra points.

• The link is provided below.

These are the systems for petrol engines. Diesel Engines have similar systems except for fuel and ignition System. Some parts of the system are built into the engine, some parts are attached to the engine and other parts are located on the body panels in the engine compartment.

The functions of these systems are summarized below. Some systems have been covered in this volume and the later blogs.

1. Starting System

The starter is used to rotate the engine during starting. It consists of an electric motor and a drive, the drive has a small pinion that meshes with the ring gear on the flywheel during starting. The battery supplies the electric current (energy) to operate the starter and rotate the engine until it fires and runs on its own. For details check the videos links

2. Fuel System

There are four basic types of fuel systems;

1. carburetor system for petrol engines

2. Fuel injection system for petrol engines

3. Gas fuel systems

4. Diesel Injection system

All these systems operate in different ways, but they all have somewhere to store fuel (a fuel tank or a cylinder) and a way of supplying the engine with the fuel. They also have a way of supplying air and fuel mixed in the correct proportions so that it can be effectively burnt in the combustion chambers.

3. Ignition System

Petrol engines and engines operating on gas require an ignition system. This is needed to provide sparks that fires the charges in the combustion chambers. For this reason, petrol engines are sometimes referred to spark-ignition engines. This distinguishes them from diesel engines that do not need spark because they use compression-ignition.

Combustion in the diesel occurs when the fuel is sprayed into the combustion chamber. The air in the cylinder is at high temperature from being compressed – high enough to ignite the fuel that sprayed from the injector.

Activity 2

Instructions:

Determine which engine system classification is described in each item by answering the quiz below.

D. Generalization

• The teacher will ask someone to wrap up the lessons

VI. Assignment

Instructions:

• Based on what you've learned about the lesson, make a MIND MAP about the Engine System. It should include of the engine systems and give at least 3 key points for each systems. Be as creative as you can. You can use any editing app of your choice

Criteria:

Clarity - 50%

Creativity - 30%

Originality - 20%

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Total - 100%