Application
This unit describes the performance outcomes required to apply knowledge of petrol and diesel engine components and systems, as well as of the principles of engine operation, during the testing and repair of basic electrical circuits in vehicles, vessels and machinery.
It applies to those working in the automotive service and repair industry. The engines include those in agricultural machinery, heavy commercial vehicles, light vehicles, vessels, mobile plant machinery, motorcycles or outdoor power equipment.
No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.
Elements and Performance Criteria
Elements Elements describe the essential outcomes. | Performance Criteria Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section. |
1. Identify relevant information relating to petrol and diesel engine operation in work activities | 1.1 Functions of engine components are identified during testing and repair activities 1.2 Functions of engine-related electrical systems are identified during testing and repair activities |
2. Apply knowledge of petrol and diesel engine operation in work activities | 2.1 Effect of electrical system on engine performance is identified during testing and repair activities 2.2 Knowledge is applied of the relationship that a four-stroke cycle petrol engine has with vehicle ignition, starting, air and fuel delivery and cooling systems 2.3 Knowledge is applied of the relationship that a diesel engine has with vehicle ignition, starting, air and fuel delivery and cooling systems |
3. Evaluate knowledge of petrol and diesel engine operation | 3.1 Knowledge is regularly checked with colleagues and supervisor to ensure currency and accuracy 3.2 Knowledge is updated as required to complement own work role |
Evidence of Performance
Before competency can be determined, individuals must demonstrate they can perform the following according to the standard defined in the unit’s elements and performance criteria, range of conditions and foundation skills:
apply knowledge of petrol and diesel engine operation during the testing and repair of three different vehicle, vessel or machinery electrical systems
evaluate and expand knowledge of petrol and diesel engine operation, including demonstrating knowledge of one of the following:
a new automotive petrol and diesel engine testing procedure
a new automotive petrol and diesel engine repair procedure
a new automotive petrol and diesel engine technology.
Evidence of Knowledge
Individuals must be able to demonstrate knowledge of:
types and location of sources of technical information relevant to automotive electrical systems, including:
workplace service information
automotive engine mechanical texts
vehicle workshop manuals
service bulletins
technical articles
automotive textbooks
classifications of engines, including:
internal combustion
reciprocating and rotary engines
spark ignition engines
compression ignition engines
engine cylinder arrangements
engine configurations, including:
inline engines, V type engines and slant cylinder engines
opposed cylinder engines
camshaft and valve locations, including:
overhead cam (OHC)
overhead valve (OHV)
engine operating principles, including:
two-stroke cycles
four-stroke cycles
engine measurement and performance ratings
operating performance of engines, including:
petrol engines
diesel engines
petrol and diesel engine operation, including:
engine construction
engine types and configuration
two-stroke and four-stroke
cycles of engine operation, including:
intake stroke
compression stroke
power stroke
exhaust stroke
firing orders
ignition types, including:
spark
compression
engine mounting location, including:
front longitudinal
front transverse
mid transverse
measurement and performance, including:
bore and stroke
displacement
compression ratio
engine efficiency
torque versus horsepower
engine components, including:
top of engine, including:
timing belt or chain
camshaft timing pulley
camshaft single and dual
rocker arms and shafts
intake valves and springs
exhaust valves and springs
cylinder head
front of engine, including:
crankshaft
crankshaft timing pulley
crankshaft pulley and balancer
rear of engine, including:
flywheel
starter ring gear
bottom of engine, including:
engine block
crankshaft
crankshaft balance weights
crankshaft main bearing journals
pistons
connecting rods
relationships between electrical systems and engine performance, including:
ignition system and engine power and torque, including:
ignition timing
combustion stroke pressure
diesel injection system and engine power and torque, including:
injection timing
combustion stroke pressure
starter motor system, including:
current draw of starting system of high compression engines
types of batteries and starter motors for petrol and diesel engines
wiring requirements of starter motor systems for petrol and diesel engines
charging system, including system requirements for low and high speed engines.
Assessment Conditions
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment must include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to having applied knowledge of petrol and diesel engine systems and components to the vehicles and machinery that they have worked on, e.g. work orders.
Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources must be made available:
technical information relating to petrol and diesel engines
automotive tools and electrical test equipment relating to the system being tested or repaired
three different vehicles, vessels or machinery with functional electrical systems.
Foundation Skills
This section describes those language, literacy, numeracy and employment skills that are essential to performance and are not explicit in the performance criteria.
Skills | Description |
Learning skills to: | locate appropriate sources of information efficiently. |
Reading skills to: | interpret a range of technical information relating to petrol and diesel engines and their operation. |
Numeracy skills to: | interpret numbers and units relating to petrol and diesel engines in automotive technical information use basic mathematical operations to calculate engine dimensions, such as bore, stroke power, and torque interpret numbers and units used with measuring equipment, such as compression gauges and cylinder leakage testers. |
Range Statement
This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.
Engine-related electrical systems | ignition system charging system starting system engine management system. |
Sectors
Technical - Electrical and Electronic
Competency Field
Electrical