Heavy Duty Diesel Engine (HDD) Operation and Maintenance
Details
This training workshop will feature:
• Discussions on the benefits and applications of heavy duty Diesel HDD engines
• The importance of correct operation and maintenance of HDD for better reliability
• The detailed description of HDD systems and characteristic performance
• Focusing on electronic control of HDD for economy and environment friendly operation
Objectives
By the end of this training seminar, participants will be able to:
• Outline the principle of operation of diesel engines
• Specify the difference between Heavy Duty Diesel Engines and normal Diesel engines
• Describe how combustion occurs in diesel engines
• Explain the reason of air charging in diesel engines
• List and explain the principle of operation of air charging systems in diesel engines
• List and explain the operation principle of various types of fuel injection systems used in HDD
• Describe the layout and components of various fuel injection systems used in HDD
• Explain how quantity and timing of injected fuel can be controlled
• State the benefits of Diesel Electronic Control (DEC)
• List and explain the principle of operation of various HDD emission control systems
• Outline the procedure and requirements for servicing HDD
• Outline the HDD basic routine maintenance operations
• List and explain how to fix the common HDD troubles
Outline
Programme Outline
Introduction to Heavy Duty Diesel (HDD) engines
• Meaning of HDD engine: Rating – Load factor – Operation duration
• HDD engine glossary of terms
• International standards for HDD engine
• HDD engine Internal and external characteristic performance curves
• Design considerations of HDD engine
• HDD engine construction features and materials
• HDD engine Applications
Work Cycle and Combustion in HDD Engines
• Work cycle, internal and external characteristic curves of HDD engines
• Diesel fuel (Classification – Fuel properties – Fuel tests)
• Combustion process in Diesel engines
• Compression ratio
• Combustion chambers shapes
• Direct & indirect injection methods
• Homogenous Charge Compression Ignition (HCCI)
• Air charging in heavy duty diesel engines:
• Types (Mechanical – Turbo – Pressure wave)
• Turbocharger configuration (Combined – Two stage - Variable geometry – Sequential)
• Turbocharger control (Pressure – Fuel compensation)
• Turbocharger performance characteristics
Fuel Injection Systems in HDD Engines
• Types and principle of operation of fuel injection systems:
◦ Cummins systems: (PT – CELECT unit injector – Accumulator – HPI – XPI)
◦ Caterpillar systems: (HUEI/A – HUEI/B – Navistar – MEUI/A – MEUI/B)
◦ In-line or multi-plungers systems.
◦ Common rail systems
• HDD engines fuel injection systems layout and components.
• Methods of control of injected fuel quantity and timing: (Hydraulic, pneumatic, electronic)
• Diesel fuel filtration and water separation.
Electronic Diesel Control (EDC)
• Advantages of EDC
• EDC basic layout and components (ECU – Sensors – Actuators – Layout for various types of fuel injection systems)
• Open & Closed loops and data processing
• Controlled quantities: Start – Drive mode – Idle speed – Maximum speed – Intermediate speeds – Cruise speed - ….)
• Injected fuel quantity limits
• Emission control systems;
◦ Diesel Oxidation catalyst (DOC)
◦ Diesel Particulate Filter (DPF)
◦ Selective catalyst Reduction (SCR)
◦ Urea Injection (UI)
◦ Exhaust gas recirculation (EGR)
◦ Closed Crankcase Ventilation (CCV)
Operation and Maintenance of HDD Engine
• Operation Tips for HDD engine
◦ Indicator lamps
◦ On-Board diagnostics
◦ Fuel type
◦ Items to be noticed
◦ Tips for efficient operation
• Maintenance of diesel engines
◦ Basics of mechanical maintenance
◦ Servicing of diesel fuel injection systems
◦ Diesel engine tune up
◦ Diesel engine routine maintenance operations (time-based, distance- based)
• Diesel engines troubleshooting
◦ Forms of diesel engine components failure
◦ Engines trouble shooting and fault rectification
◦ Testing of injection pumps, injectors, fuel feed pumps
◦ Tests for assessment of engine condition (compression, leakage tests)
Schedules
No. of Days: | 3 |
Citadel for Technological and Engineering Dev. (CITED), a leading organisation in rendering quality service in Corporate Training, Manpower Development and Continued Professional Development (CPD) of Engineers, Technologist and Technicians have been in existence for over twenty years bringing quality service to Nigerians and Nigerian Engineers. Our portfolio of programs is renowned for its breadth and depth of focus, the caliber of its speakers, its interactive, practical and result-orientated nature, and the diverse and national range of participants. It is an excellent networking opportunity.
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