Application
This unit describes the performance outcomes required to apply knowledge of the construction and operation of engines and their components during engine repair or reconditioning activities. It involves identifying engine components and describing their function.
It applies to those working in the automotive service and repair industry.
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 of engine construction and operation | 1.1 Components of engine are identified during repair or reconditioning activities 1.2 Functions of engine components are identified during repair or reconditioning activities 1.3 Relationships between engine components, including effects on other components’ tolerances and clearances, are identified during repair or reconditioning activities 1.4 Engine configurations are identified during repair or reconditioning activities |
2. Apply relevant information of engine construction and operation to work activities | 2.1 Knowledge of engine construction and operation is used during repair or engine reconditioning activities to carry out work according to manufacturer specifications and workplace procedures 2.2 Knowledge of engine diagnosis is used during repair or reconditioning activities to identify causes of engine component wear or failure |
3. Evaluate knowledge of engine science | 3.1 Knowledge of engine science is regularly checked with colleagues and supervisor to ensure currency and accuracy 3.2 Knowledge of engine science 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 this unit’s elements, performance criteria and foundation skills:
apply knowledge of engine science to three different multi-cylinder engines when diagnosing and repairing engine faults or reconditioning engine components
evaluate and expand knowledge of engine science, including demonstrating knowledge of one of the following:
new repair or reconditioning procedure
new engine technology
new reconditioning machine.
Evidence of Knowledge
Individuals must be able to demonstrate knowledge of:
classifications of engines, including:
internal and external combustion
rotary and reciprocating engines
spark ignition and 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:
combustion, including:
air to fuel ratios and flame propagation
direct and indirect fuel injection
detonation and pre-ignition
two-stroke and four-stroke cycles
procedures for measuring engines and engine performance, including:
bore and stroke, including:
over square, square and under square engines
crank throw
swept volume and engine volume
compression ratio
engine efficiency, including volumetric efficiency, thermal efficiency and mechanical efficiency
torque and horsepower, including brake horsepower
construction and operation of petrol engines, including:
basic metallurgy relating to engines
identification of metric and imperial threads
engine components, including cylinder blocks, cylinders, pistons, cylinder heads, combustion chambers, inlet and exhaust manifolds, connecting rods, crankshafts, piston rings, gudgeon pins, camshafts, cams and flywheels
combustion chambers, including:
L head, bathtub, wedge, trapezoidal, hemispherical and heron-type shapes
multiple valve designs
construction and operation of diesel engines, including:
direct and indirect injection
swirl chambers
pre-combustion chambers
engine diagnosis, including:
wet and dry compression tests
cylinder leakage tests
cylinder power balance tests
vacuum tests
oil pressure tests
sources of fluid leaks
exhaust smoke diagnosis
engine noise diagnosis, including procedures for identifying:
common engine noises
common abnormal combustion noises
procedures for expanding knowledge, including location and content of:
technical literature relating to engine science
technical information relating to new and emerging engine technologies.
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 the engine science they have applied to engines that they have worked on, e.g. repair 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:
automotive repair workplace or simulated workplace
workplace instructions
three different multi-cylinder engines
technical literature relating to engine science.
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 engine reconditioning procedures and engine specifications in workshop and manufacturer literature efficiently. |
Reading skills to: | interpret technical information and terminology found in workshop manuals and automotive textbooks relating to engines. |
Communication skills to: | discuss interpretation of engine science with colleagues and supervisor using listening skills and correct industry terminology. |
Numeracy skills to: | interpret numbers and units in information relating to engines in workshop manuals and automotive textbooks use basic mathematical operations, including addition, subtraction and multiplication, to calculate engine dimensions use simple formulas, such as A = pr2 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.
There is no Range of Conditions for this unit.
Sectors
Technical - Engines
Competency Field
Mechanical Miscellaneous