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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate knowledge of fuel supply and engine management systems 
SAQA US ID UNIT STANDARD TITLE
260679  Demonstrate knowledge of fuel supply and engine management systems 
ORIGINATOR
SGB Vehicle Maintenance 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  10 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard replaces: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
244054  Demonstrate knowledge of electronic fuel injection and engine management systems  Level 3  NQF Level 03  10   
244046  Demonstrate knowledge of mechanical fuel injection systems  Level 3  NQF Level 03  5   
244044  Demonstrate knowledge of diesel fuel injection and engine management systems  Level 3  NQF Level 03  7   
244050  Demonstrate knowledge of petrol fuel injection and engine management systems  Level 3  NQF Level 03  7   

PURPOSE OF THE UNIT STANDARD 
This unit standard is for people in the automotive engineering industry who are required to have knowledge of fuel supply and engine management systems.

People credited with this unit standard are able to:
  • Demonstrate knowledge of fuel supply principles.
  • Demonstrate knowledge of carburetted system.
  • Demonstrate knowledge of throttle body injection (TBI) system.
  • Demonstrate knowledge of continuous fuel injection system.
  • Demonstrate knowledge of pulsed fuel injection system.
  • Identify the components of engine management systems and their functions.
  • Demonstrate knowledge of air pollution and vehicle exhaust emissions.
  • Demonstrate knowledge of emission controls.

    This unit standard may be used in the context of one or more of the following areas of specialisation:
  • Passenger vehicle.
  • Commercial vehicle.
  • Earthmoving equipment.
  • Lift truck.
  • Motor cycle. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that learners are already competent in terms of the following outcomes or areas of learning when starting to learn towards this unit standard:
  • The ability to work safely in an automotive workshop at NQF Level 2.
  • The ability to use automotive engineering tools and equipment at NQF Level 2.
  • The ability to understand the basic operation of engines at NQF Level 2. 
    		•

    UNIT STANDARD RANGE 
    The following scope and context applies to the whole unit standard:
  • Reference to suitable tools and equipment means industry approved tools and equipment that are recognised within the industry as being the most suited to complete the task to a professional and competent manner with due regard to safe working practices.
  • Fuel supply systems include:
    > Carburettor.
    > Mechanical fuel injection.
    > Electronic fuel injection.
    > Petrol and diesel engines.

    Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate knowledge of fuel supply principles. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The purpose and operation of a fuel supply system is explained in terms of fuel metering and supply. 

    ASSESSMENT CRITERION 2 
    The properties of different fuels are explained in terms of fuel contents and their effect on the engine. 

    ASSESSMENT CRITERION 3 
    Fuel supply systems are compared in terms of the advantages and disadvantages for different systems. 
    ASSESSMENT CRITERION RANGE 
    Atomisation, fuel economy, fuel distribution, idling, emission, engine power, cold weather, driveability.
     

    ASSESSMENT CRITERION 4 
    The effect of pressure and suction (vacuum) on the fuel supply process is described in terms of fuel flow. 

    ASSESSMENT CRITERION 5 
    The differences between direct and indirect fuel injection are described according to the engine operation and performance. 

    ASSESSMENT CRITERION 6 
    Relevant safety requirements in working with fuel are identified in terms of health and safety legislation. 

    ASSESSMENT CRITERION 7 
    The different types of injectors and nozzle designs are described according to the manufacturer's specifications. 
    ASSESSMENT CRITERION RANGE 
    Throttle body type injectors, electromagnetic fuel injector, top feed type injector, bottom feed type injector. Injector nozzles include ring gap, single orifice, multi-orifice, multi-orifice with dual stream.
     

    SPECIFIC OUTCOME 2 
    Demonstrate knowledge of carburetted system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Controlling the air/fuel mixture in a carburettor is explained in terms of the functioning of the carburettor. 

    ASSESSMENT CRITERION 2 
    The main components of the carburettor are identified and described in terms of their purpose and location. 

    ASSESSMENT CRITERION 3 
    The configuration and layout of a carburettor is described according to the manufacturer's specifications. 

    ASSESSMENT CRITERION 4 
    Carburetted fuel system components are identified in terms of their location on the vehicle and the fuel flow path. 

    SPECIFIC OUTCOME 3 
    Demonstrate knowledge of throttle body injection (TBI) system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Controlling the air/fuel mixture in a throttle body injection system is explained in terms of the application of the throttle valve. 

    ASSESSMENT CRITERION 2 
    The main components of the fuel system are identified and described in terms of their purpose and location. 

    ASSESSMENT CRITERION 3 
    The configuration and layout of a TBI system is described according to the manufacturer's specifications. 

    ASSESSMENT CRITERION 4 
    TBI fuel system components are identified in terms of their location on the vehicle and the fuel flow path. 

    SPECIFIC OUTCOME 4 
    Demonstrate knowledge of continuous fuel injection system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Controlling the air/fuel mixture in a continuous injection system is explained in terms of the application of the throttle valve. 

    ASSESSMENT CRITERION 2 
    The main components of the fuel system are identified and described in terms of their purpose and operation. 

    ASSESSMENT CRITERION 3 
    The different types of continuous injection systems are described in terms of method of operation. 

    ASSESSMENT CRITERION 4 
    Continuous fuel system components are identified in terms of their location on the vehicle and the fuel flow path. 

    SPECIFIC OUTCOME 5 
    Demonstrate knowledge of pulsed fuel injection system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The different types of pulsed injection systems are explained in terms of operating principles according to manufacturer's specifications. 

    ASSESSMENT CRITERION 2 
    Pulse times and pulse periods are explained in terms of the relationship with the electronic control unit. 

    ASSESSMENT CRITERION 3 
    Pulsed fuel system components are identified in terms of their location on the vehicle and the fuel flow path. 

    SPECIFIC OUTCOME 6 
    Identify the components of engine management systems and their functions. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The purpose and function of engine management systems is explained in terms of engine performance and exhaust emissions. 

    ASSESSMENT CRITERION 2 
    The components used for acquiring and transmitting measured variables are explained in terms of their purpose and function. 
    ASSESSMENT CRITERION RANGE 
    Components include electronic input devices or sensors.
     

    ASSESSMENT CRITERION 3 
    Exhaust gas recirculation (EGR) control is explained in terms of minimising exhaust emissions and lowering exhaust gas temperatures. 

    ASSESSMENT CRITERION 4 
    The idle speed control system is explained and the components used to regulate idle speed are described according to the manufacturer's specifications. 
    ASSESSMENT CRITERION RANGE 
    Idle-speed actuator, load compensation sensors, throttle-valve switch, idle-speed switch, temperature sensor, idle-speed control circuit.
     

    ASSESSMENT CRITERION 5 
    The purpose and function of the electronic control unit (ECU) is explained in terms of processing variables. 

    ASSESSMENT CRITERION 6 
    The systems controlled by the electronic control unit (ECU) are identified and described in terms of data transfer. 
    ASSESSMENT CRITERION RANGE 
    Systems controlled by the ECU include transmission control, electronic throttle control (drive by wire), electronic engine management, traction control (ARS), electronic stability control, adaptive cruise control, on-board computer.
     

    ASSESSMENT CRITERION 7 
    Common engine management system faults are described in terms of the effect on engine performance. 

    SPECIFIC OUTCOME 7 
    Demonstrate knowledge of air pollution and vehicle exhaust emissions. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Types of air pollution is explained in terms of characteristics and how it is produced. 
    ASSESSMENT CRITERION RANGE 
    Natural air pollution (forest fires, wind-blown dust, decay of vegetation, erupting volcanoes), man-made air pollution (factories, home industry, internal combustion engines).
     

    ASSESSMENT CRITERION 2 
    The major and minor components of exhaust gasses are described in terms of their properties. 
    ASSESSMENT CRITERION RANGE 
    Major components include water, carbon dioxide, oxides of nitrogen. Minor components include carbon monoxide, nitrogen monoxide/nitrous oxide, hydrocarbons, particulates (particulate matter).
     

    ASSESSMENT CRITERION 3 
    The types of air/fuel mixture and the effects of incorrect mixture are explained according to the contribution to air pollution. 
    ASSESSMENT CRITERION RANGE 
    Types of air/fuel mixtures include homogenous mixture, heterogeneous mixture, excess-air mixture, air deficiency mixture.
     

    SPECIFIC OUTCOME 8 
    Demonstrate knowledge of emission control. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Engine design characteristics for controlling emissions are described according to the manufacturer's workshop manual. 
    ASSESSMENT CRITERION RANGE 
    Air-fuel ratio, mixture formation, uniform air/fuel distribution, exhaust-gas recirculation (EGR), valve timing, compression ratios, combustion chamber design, ignition systems, crankcase ventilation.
     

    ASSESSMENT CRITERION 2 
    Exhaust gas treatment methods are explained in terms of controlling engine emissions. 
    ASSESSMENT CRITERION RANGE 
    Thermal afterburning, catalytic afterburning.
     

    ASSESSMENT CRITERION 3 
    The different types of vehicle emission control systems and the components are explained in terms of their operation. 
    ASSESSMENT CRITERION RANGE 
    Positive crankcase ventilation (PCV) system, evaporative emissions control system, exhaust-gas recirculation (EGR) system, air injection system, thermostatic air cleaner system, catalytic converter, computerised/electronic emissions control system.
     


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard.

    The following embedded knowledge is addressed in an integrated way in the unit standard:
  • Workplace procedures.
  • Safe working practices.
  • The use and application of tools and equipment.
  • How to locate manufacturer specifications in a workshop manual.
  • The principles of fuel injection.
  • Types and components of fuel injection systems.
  • Functions of fuel injection systems.
  • Methods of controlling emissions.
  • Types of air pollution. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems:
  • Related to fuel supply and emission control. 
    		•

    UNIT STANDARD CCFO WORKING 
    Work effectively with others:
  • Interact with team members and colleagues to obtain information required. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage myself and my activities:
  • When explaining fuel systems. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively:
  • When explaining fuel systems. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically:
  • For specific fuel systems. 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems:
  • Understanding the effect of emissions on the environment. 
    		•

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    This unit standard replaces the following unit standards:
  • ID 244054: Demonstrate knowledge of electronic fuel injection and engine management systems, Level 3, 10 credits.
  • ID 244046: Demonstrate knowledge of mechanical fuel injection systems, Level 3, 5 credits.
  • ID 244044: Demonstrate knowledge of diesel fuel injection and engine management systems, Level 3, 7 credits.
  • ID 244050: Demonstrate knowledge of petrol fuel injection and engine management systems, Level 3, 7 credits. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  78524   National Certificate: Automotive Repair and Maintenance  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  As per Learning Programmes recorded against this Qual 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.