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Elements and Performance Criteria
Range Statement
Performance Evidence
Knowledge Evidence
Individuals must be able to demonstrate knowledge of:
classifications of engines, including:internal and external combustionrotary and reciprocating enginesspark ignition and compression ignition enginesengine cylinder arrangementsengine configurations, including:inline engines, V type engines and slant cylinder enginesopposed cylinder enginescamshaft and valve locations, including:overhead cam (OHC)overhead valve (OHV)engine operating principles, including:combustion, including:air to fuel ratios and flame propagationdirect and indirect fuel injectiondetonation and pre-ignitiontwo-stroke and four-stroke cyclesprocedures for measuring engines and engine performance, including:bore and stroke, including:over square, square and under square enginescrank throwswept volume and engine volumecompression ratioengine efficiency, including volumetric efficiency, thermal efficiency and mechanical efficiencytorque and horsepower, including brake horsepowerconstruction and operation of petrol engines, including:basic metallurgy relating to enginesidentification of metric and imperial threadsengine components, including cylinder blocks, cylinders, pistons, cylinder heads, combustion chambers, inlet and exhaust manifolds, connecting rods, crankshafts, piston rings, gudgeon pins, camshafts, cams and flywheelscombustion chambers, including:L head, bathtub, wedge, trapezoidal, hemispherical and heron-type shapesmultiple valve designsconstruction and operation of diesel engines, including:direct and indirect injectionswirl chamberspre-combustion chambersengine diagnosis, including:wet and dry compression testscylinder leakage testscylinder power balance testsvacuum testsoil pressure testssources of fluid leaksexhaust smoke diagnosisengine noise diagnosis, including procedures for identifying:common engine noisescommon abnormal combustion noisesprocedures for expanding knowledge, including location and content of:technical literature relating to engine sciencetechnical information relating to new and emerging engine technologies.