Heavy Duty Diesel Engine Treatment, Tools, and Repair Course

Heavy-Duty Diesel (HDD) Engines – An Introduction
• Meaning of HDD Engine
o Rating
o Load factor
o Operation Duration
• HDD Engine Glossary of Terms
• International Standards for 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
• Diesel Fuel:
o Classification
o Fuel properties
o 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:
o Mechanical
o Turbo
o Pressure wave
• Turbocharger Configuration
o Combined Two Stage
o Variable Geometry
o Sequential
• Turbocharger Control
• Turbocharger Performance Characteristics
Fuel Injection Systems In HDD Engines
• Types and Principle of Fuel Injection Systems:
• Cummins Systems:
o PT
o CELECT unit injector
o Accumulator
o HPI
o XPI
• Caterpillar Systems:
o HUEI/A
o HUEI/B
o Navistar
o MEUI/A
o MEUI/B
• In-line or Multi-plungers Systems
• Common Rail Systems
• Fuel Injection Systems – Design and Mechanisms
• Injected Fuel Quantity and Timing – Methods of Control:
o Hydraulic
o Pneumatic
o Electronic
• Diesel Fuel Filtration and Water Separation
Electronic Diesel Control (EDC)
• Advantages of EDC
• EDC Basic Layout and Components
o ECU
o Sensors
o Actuators
o Layout for fuel injection systems
• Open & Closed Loops
• Data Processing
• Controlled Quantities:
o Start
o Drive mode
o Idle speed
o Maximum speed
o Intermediate speed
o 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

1ST BATCH: Tuesday, January 13, 2026 — Friday, January 16, 2026.

2ND BATCH: Tuesday, May 5, 2026 — Friday, May 8, 2026.

3RD BATCH: Tuesday, September 1, 2026 — Friday, September 4, 2026.

The training methodology integrates lectures, interactive discussions, collaborative group exercises, and
illustrative examples. Participants will acquire a blend of theoretical insights and hands-on practical
experience, emphasizing the application of learned techniques. This approach ensures that attendees return
to their professional environments equipped with both the competence and self-assurance to effectively
implement the acquired skills in their responsibilities.