Motor Trade Theory N3

TVET FIRST

Motor Trade Theory N3

This document includes important informa on about the revised curriculum for Motor Trade Theory N3, scheduled for implementa on in 2021. Contact jayshil.bhula@macmillaneduca on.co.za to request a sample copy of the TVET First approved textbook or visit our website at www.macmillaneduca on.co.za. For best results, use TVET First Motor Trade Theory N3!

Major changes to the 2021 curriculum:

Much of the material has been updated to new automo ve technologies. Sec ons from the previous curriculum on workshop layout, recep on, contracts, owner risk and workplace safety are not covered at this level and have largely been moved to N1. New content includes: • New aspects of advanced engine measurements, including engine effi ciency • Forced induc on system designs, including turbochargers and superchargers • Diff erent valve ming op misa on systems in modern cylinder head designs • Modern electronic fuel injec on systems • Four types of electronic igni on systems, including distributor-less igni on systems • Final drives now covers all-wheel drive systems • Modern electrical-assisted power steering systems • Hybrid and fuel cells • On-board diagnos c computers

Descrip on of curriculum changes per module New content Module 1: Advanced engine measurements

• This is an update of the previous Module 1: Engines.

Students will learn about engine displacement, compression ra o and fi ring sequences. • Weigh ng is 15% of the curriculum.

Engine Technology

• List and explain engine fi ring sequences. • Defi ne engine effi ciency. • Explain how to improve engine effi ciency.

Module 2: Forced induc on system designs

• This is a new sec on. • The new curriculum deals with understanding the construc on and opera on of turbochargers and superchargers. • Weigh ng is 5% of the curriculum.

Turbochargers

• Discuss the construc on of the modern turbocharger. • Describe the func ons of turbocharger components. • Draw and label a turbocharger. • List checks to be carried out on turbochargers. • Iden fy faults on turbochargers.

Superchargers

• Discuss the construc on of the modern superchargers.

TVET FIRST

Descrip on of curriculum changes per module New content

• Describe the func ons of supercharger components. • Draw and label a supercharger. • List checks to be carried out on superchargers. • Iden fy faults on superchargers.

Module 3: Modern cylinder head designs

• In the previous curriculum, Module 2 covered the func oning and arrangement of valves. This is an update on the new technology involved, especially with regard to valve ming op misa on. • Curriculum weigh ng: 10%

Module 4: Electronic fuel injec on systems

• This module deals with understanding the opera ons of modern fuel injec on systems. It is an update to Module 3 of the previous curriculum. • Curriculum weigh ng: 13%

Valve and valve ming op misa on

• Explain diff erent systems used (e.g. variable valve ming). • Discuss various valve layouts. • Explain the opera on of the various systems. • Draw and label various systems. • List advantages and disadvantages of these types of systems.

Modern fuel injec on

• Explain the opera on of a modern fuel injec on system. • List the func ons of components in a modern fuel injec on system. • Draw and label a modern fuel injec on system. • List checks to be carried out on a modern fuel injec on system. • Iden fy faults on a modern fuel injec on system.

Module 5: Electronic igni on systems

• This is an update to the module on igni on (Module 4) of the previous curriculum. In addi on to transistorised igni on, there is now an introduc on to distributor-less igni on systems. • Curriculum weigh ng: 10%

Introduc on to distributor-less igni on systems

• List the components that make up a basic igni on system. • Describe the func ons and opera on of the components. • Explain how the igni on system works. • Draw and label a basic system.

Module 6: Fluid clutches

• The previous curriculum covered fl uid clutches in

Module 5. • Curriculum weigh ng: 5% This module is largely unchanged.

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Descrip on of curriculum changes per module New content Module 7: Automa c and electronic transmissions

• The previous curriculum dealt with gearboxes in Module 6. The updated curriculum includes electronically controlled gearboxes. • Curriculum weigh ng: 15%

Electronically controlled gearboxes

• Explain the basic opera on of electronic gearboxes. • Describe the diff erent types of electronic and sequen al controlled gearboxes. • List the components of electronically controlled gearboxes. • Discuss the func ons of electronically controlled gearbox components.

Module 8: Final drives

• Module 7 of the previous curriculum covered fi nal drives and diff eren als. The updated curriculum also covers all-wheel drive systems. • Curriculum weigh ng: 10%

All-wheel drive (AWD) systems

• Explain the layout of this system. • Explain the opera on of an AWD system. • Draw and label an AWD system.

Module 9: Power assisted steering systems

• Module 8 of the previous curriculum covered power assisted steering. The modern electricalassisted system is now included. • Curriculum weigh ng: 7% • Explain the various types of power assisted steering systems (including the modern electrical assisted system). • Discuss the opera on and func ons of components in the system. • Explain the opera on of how the power assisted steering systems work. • List the advantages and disadvantages of the various assisted systems. • List checks to be carried out on the power assisted steering systems. • Iden fy faults on the power assisted steering systems.

Module 10: Hybrid and fuel cells

• This is a completely new module – the student should understand the construc on, func ons and opera ons of hybrid and fuel cell engines. • Curriculum weigh ng: 5%

Hybrid system

• List various types of hybrid systems. • Discuss the components and their func ons. • Explain the opera on of a hybrid system. • Draw and label a hybrid system.

Fuel cells

• List various types of fuel cell systems. • Discuss the components and their func ons. • Explain the opera on of a fuel cell system. • Draw and label a fuel cell system.

TVET FIRST

Descrip on of curriculum changes per module New content Module 11: Computer based diagnos cs

• This is a completely new sec on dealing with onboard diagnos c machines. • Curriculum weigh ng: 5%

Diagnos cs:

• Explain the reason for using the on-board diagnos c machines (scan tool). • Describe the basic opera on of an on-board diagnos c machine. • Interpret the meaning of the various fault codes. • Explain how to clear fault codes.

TVET First authors:

Sparrow Consul ng