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

Demonstrate knowledge of petrol fuel injection and engine management systems 
SAQA US ID UNIT STANDARD TITLE
244050  Demonstrate knowledge of petrol fuel injection 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  7 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Registered" 		 2008-02-06  2009-02-18  SAQA 0875/08 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2010-02-18   2013-02-18  

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 is replaced by: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
260679  Demonstrate knowledge of fuel supply and engine management systems  Level 3  NQF Level 03  10   

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

People credited with this unit standard are able to:
  • Demonstrate knowledge of petrol fuel injection principles.
  • Demonstrate knowledge of throttle body injection (TBI) system.
  • Demonstrate knowledge of continuous fuel injection system.
  • Demonstrate knowledge of pulsed fuel injection system.
  • Demonstrate knowledge of and identify the components of petrol engine management systems.
  • Demonstrate knowledge of air pollution and vehicle exhaust emissions.
  • Demonstrate knowledge of emission control for spark-ignition engines. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Communication and Mathematical Literacy at NQF Level 2.
  • The ability to use automotive engineering tools and equipment.
  • The ability to work safely in an automotive workshop. 
    		•

    UNIT STANDARD RANGE 
    The following scope and context applies to the whole unit standard:
  • Reference to suitable tools means industry approved tools 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.
  • Work is carried out in a fully equipped automotive workshop.

    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 petrol fuel injection principles. 

    ASSESSMENT CRITERIA     

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

    ASSESSMENT CRITERION 2 
    A petrol fuel injection system is described in terms of its advantages over a carburettor type fuel system. 
    ASSESSMENT CRITERION RANGE 
    Atomisation, fuel economy, fuel distribution, idling, emission, engine power, cold weather, driveability.
     

    ASSESSMENT CRITERION 3 
    The effects of pressure and suction (vacuum) on the fuel injection process are described in terms of fuel flow. 

    ASSESSMENT CRITERION 4 
    The differences between direct and indirect fuel injection are described according to the engine operation and performance. 

    ASSESSMENT CRITERION 5 
    Relevant safety requirements in working with petrol are identified in terms of health and safety legislation. 

    ASSESSMENT CRITERION 6 
    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 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 are described according to the manufacturer's specifications. 

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

    SPECIFIC OUTCOME 3 
    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 RANGE 
    Mechanical, electronic.
     

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

    SPECIFIC OUTCOME 4 
    Demonstrate knowledge of pulsed fuel injection system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Fuel metering and supply are explained in terms of the components used and their functions. 

    ASSESSMENT CRITERION 2 
    The different types of pulsed injection systems are explained in terms of operating principles according to manufacturer's specifications. 

    ASSESSMENT CRITERION 3 
    Pulse times and pulse periods are explained in terms of the relationship with the electronic control unit. 

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

    SPECIFIC OUTCOME 5 
    Demonstrate knowledge of and identify the components of petrol engine management systems. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The purpose and function of engine management systems are 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 
    Engine speed and crankshaft position sensors, camshaft position sensor, engine load sensors (air flow sensor, hot-wire air-mass sensor, hot-film air-mass sensor, intake manifold pressure sensor, throttle valve sensor), engine and intake-air sensors, battery voltage, vehicle speed 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, 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) are 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, anti-lock braking system (ABS) 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 6 
    Demonstrate knowledge of air pollution and vehicle exhaust emissions. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Air pollution is described in terms of its 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 gases are described in terms of their properties. 
    ASSESSMENT CRITERION RANGE 
    Major components include water, carbon dioxide, 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 7 
    Demonstrate knowledge of emission control for spark-ignition engines. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Engine design characteristics for controlling emissions of spark-ignition engines 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 spark-ignition 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 or moderating the assessment of a learner against this unit standard must be registered as an assessor with the relevant Education, Training, Quality, Assurance (ETQA) Body, or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant Education, Training, Quality, Assurance (ETQA) Body, or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant Education, Training, Quality, Assurance (ETQA) Body, or by an ETQA that has a Memorandum of Understanding with the relevant ETQA, according to the ETQA's policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described in the Unit Standard.
  • Anyone wishing to be assessed against this unit standard may apply to be assessed by any assessment agency, assessor or provider institution that is accredited by the relevant ETQA. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    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 petrol fuel injection.
  • Types and components of petrol 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 and make decisions using critical and creative thinking. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as members of a team, group, organisation or community. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively, using visual, mathematical and/or language skills in the modes of oral and/or written presentations. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically showing responsibility towards the environment and health of others. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    UNIT STANDARD NOTES 
    This unit standard has been replaced by unit standard 260679, which is "Demonstrate knowledge of fuel supply and engine management systems", Level 3, 10 credits.

    Terminology:

    Terms used in this unit standard are generic to the automotive engineering industry in South Africa.

    Notes to Assessors:

    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
  • Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
  • Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
  • Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
  • The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
  • The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.
  • All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  58497   National Certificate: Automotive Repair and Maintenance  Level 3  NQF Level 03  Passed the End Date -
    Status was "Registered"     		 2009-02-18  Was MERSETA until Last Date for Achievement 


    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.