Elements and Performance Criteria
- Evaluate diesel fuel systems
- Why atomisation and penetration of fuel and air turbulence are essential to optimum combustion is explained
- Typical injection pressures and viscosities for different grades of fuel are documented and compared
- Design modifications of pumps, camshafts and injectors for fuel types are outlined
- Difference between constant and variable injection fuel pump timing, showing materials, principal parts, method of operation and adjustments of common pump types is compared and explained
- Injection requirements for slow speed and high speed diesel engines are compared, including pilot injection and pre-combustion chambers
- Common service faults, symptoms and causes of diesel fuel injection problems are identified, specifying appropriate adjustments, including methods of fuel pump timing
- Work health and safety/occupational health and safety (WHS/OHS) requirements for handling and testing fuel injection systems are explained
- Normal operating pressures and temperatures for fuel valve cooling arrangements, and uni-fuel and dual-fuel systems, including both high/medium viscosity fuel types are explained
- Evaluate different methods of diesel engine cooling
- Importance of maintaining diesel engine thermal efficiency and evaluate thermal loads on engine components is outlined
- Cooling media selection is justified, and advantages and disadvantages of different diesel cooling methods are outlined
- Appropriate action to be taken with common faults in cooling systems is explained and different cooling water treatments are compared
- How cooling systems are commissioned, stored during idle periods and restored after contamination is confirmed
- Methods of load-dependent cooling of diesel alternators on heavy fuels are evaluated
- Normal operation temperatures, pressures, and methods of cooling medium and slow speed diesel engine pistons, exhaust valves, cylinders, turbochargers and cylinder heads are identified
- Evaluate diesel engine lubrication requirements
- Principles of engine lubrication are outlined
- Lubricant types, physical and chemical properties and applications are assessed
- Sources of diesel lubricant contamination and deterioration are identified
- Ways of testing for diesel lubricant contamination and deterioration, interpreting test results and identifying appropriate action to be taken are outlined
- Distribution of lubricating oil to guides, top-end, bottom-end and main bearings of diesel engines, showing direction of flow, typical clearances and stating normal operating temperatures and pressure is explained
- Principles of bearing lubrication are outlined
- Materials used in bearing construction are identified
- Bearing faults are evaluated and remedies to prevent them from occurring are determined
- Compare different propulsion, manoeuvring and starting methods
- Starting procedures of diesel engines for power generation, propulsion, and emergency use are clarified
- Starting and manoeuvring requirements/sequences for direct-coupled reversible and geared propulsion diesels, including CPP applications are explained
- Common faults are analysed and appropriate action to be taken with typical diesel starting and manoeuvring systems is identified
- Manoeuvring and reversing systems of propulsion diesel engines are outlined
- Different methods of achieving reversing capability with direct-coupled propulsion diesels are compared
- Layout of a diesel-electric drive is compared and contrasted with the layout of a turbo electric drive
- Analyse materials used in constructing diesel engines
- Common materials used in diesel engine construction are assessed, selection is justified, and typical compositions and physical properties of components are specified
- Dynamic stresses and loads are interpreted, service limitations are identified and different methods of component fabrication are evaluated
- Two-stroke and four-stroke operating cycle forces, couples and moments, relating to design principles of crankshafts, bedplates, foundations and crossheads are outlined
- Out-of-balance gas and inertia forces, couples and moments are related to flywheels, balance weights and first/second order balancing
- Factors contributing to torsional vibration are explained and methods of minimising or eliminating harmful effects of critical speeds are clarified
- Pistons, liners, piston rings, bearings and crankshafts are calibrated to identify wear patterns, limits and means of correction
- Alignment and adjustment criteria of crankshafts, chain-drives, integral thrust bearings and crossheads are specified
- Specified working clearances and limits of all bearings, sliding surfaces and interference fits of typical diesel engines are compiled using engine builder manuals
- Explain uptake and scavenge fires and air line, gearbox and crankcase explosions
- Design and operational factors that contribute to fires in waste heat units are explained and methods of extinguishing and/or containing soot and hydrogen fires are specified
- Routine cleaning procedures, inspection criteria, symptoms of fire and risks of isolation in service associated with waste heat units are identified
- Operational factors that contribute to scavenge fires are identified, symptoms are outlined, methods of extinguishing are evaluated and routine inspection criteria of scavenge spaces are stated
- Principles of explosive mixtures are clarified and how a starting airline explosion can occur is explained
- How risk of scavenge fires may be minimised in service by protective devices and routine evaluation of starting air systems is clarified
- Causes of gearbox and crankcase explosions in propulsion and auxiliary drives are outlined
- How risks of gearbox and crankcase explosions may be minimised in service are explained and correct procedures to be taken in the event of warning of a hazardous atmosphere in both oil and dual-fuel engines are clarified
- Operating principles of an oil-mist detector, crankcase breather and explosion relief doors are explained
- Function of a piston rod scraper box is outlined, and causes of wear and appropriate adjustments are identified
- Explain correct working practices associated with diesel engine operation, maintenance and repair
- Safe working practices associated with isolating main and propulsion diesels under all emergency and routine situations are explained, including use of protective devices, interlocks and evaluation of their status
- Safe working practices associated with working in crankcases and other enclosed spaces are explained
- Safe working practices associated with safe handling of hydraulic tools and dangers of lifting/isolating heavy components both unaided and with lifting gear are explained
- Hazards of working with flammable liquids under pressure, chemicals, acids and hydrocarbons as well as selection criteria for appropriate protective clothing are explained
- Safe working strategies for diesel engine maintenance are planned using engine manufacturer instruction manuals and product data safety sheets
- Analyse faults using combustion diagnostic equipment
- Two-stroke and four-stroke theoretical cycle diagrams are compared with results recorded using diagnostic tools
- Combustion faults from typical diagrams are evaluated and corrective adjustments are specified
- Service combustion values are compared with trials or test bed figures
- Common faults associated with pressure charging and fuel injection systems are outlined
- Methods of pressure charging diesel engines are compared, and materials of construction, design features, operational maintenance and emergency procedures are correctly identified
- Causes of efficiency loss and surge are explained
- Scavenging systems and gas/air flow paths through a turbocharger, under normal and emergency operation modes are explained using relevant diagrams
- Analyse construction and operation of marine gas turbines
- Flow of air and gas through a simple cycle marine gas turbine is analysed
- Materials and construction of compressor, combustion system and turbine in single and two shaft designs are outlined
- Controls required for control and protection of marine gas turbines are detailed
- Function of accessories necessary for safe operation of marine gas turbines are explained