Fuel Injection System
About This Course
Fuel Injection Systems, Components, Operation & Testing & Troubleshooting
Program Purpose
Develop participants’ capability to understand, analyze, maintain, and troubleshoot diesel fuel injection systems used in heavy equipment by progressing from fuel fundamentals to advanced electronic injection technologies, covering all major fuel system architectures across different engine manufacturers, with strong focus on diagnostics and real field applications.
The course covers
- Fuel Fundamentals & Injection Principles
- Fuel Supply, Filtration & Contamination Control
- Mechanical Inline Injection Systems
- Mechanical Unit Injector Systems (MUI)
- Rotary / Distributor Pump Systems
- Cummins PT Fuel System
- Cummins Quantum Fuel System
- Electronic Unit Injector Systems (EUI / UIS)
- Hydraulic Electronic Unit Injector Systems (HEUI)
- Common Rail Systems (CRDI)
- Electronic Control Systems (ECM / PEEC)
- Fuel System Testing, Inspection & Monitoring
- Fuel System Faults, Diagnostics & Troubleshooting
- Case Studies Across OEM & Equipment
Learning Objectives
• Participants will gain the ability to:
• Understand and compare all diesel fuel injection systems from mechanical to advanced electronic technologies
• Analyze fuel system behavior by linking components, operation, and engine performance
• Apply structured diagnostic methodology instead of trial-and-error maintenance
• Identify and differentiate faults across mechanical, hydraulic, and electronically controlled fuel systems
• Interpret engine symptoms such as hard starting, low power, smoke, and unstable operation based on fuel system behavior
• Evaluate the effect of injection timing, pressure, and atomization on combustion efficiency
• Recognize contamination risks and apply proper filtration and maintenance practices
• Improve troubleshooting accuracy, reducing unnecessary component replacement and downtime
• Work confidently across multiple OEM fuel system architectures (CAT, Cummins, Komatsu, Volvo, Perkins)
• Apply logical diagnostic thinking to real heavy equipment engine conditions
Curriculum
40h
Fuel Fundamentals & Injection Principles
Build a complete understanding of diesel fuel behavior and injection basics.
Topics
• Diesel fuel properties and characteristics
• Fuel atomization and spray behavior
• Injection timing and combustion relationship
• Fuel pressure and injection quality
• Effect of fuel quality on engine performance
Fuel Supply Systems & Filtration
Understand fuel delivery and protection systems.
Topics
• Fuel tank and supply system layout
• Lift pump and transfer operation
• Filtration stages and water separation
• Contamination sources and risks
• Air ingress and supply faults
Mechanical Inline Injection System
Understand inline pump systems and diagnose faults.
Topics
• Pump components and structure
• Plunger operation and fuel delivery
• Injection timing control
• Governor function
• Common faults and behavior
Mechanical Unit Injector (MUI)
Understand unit injector mechanical systems.
Topics
• MUI components and design
• Cam-driven injection operation
• Fuel delivery control
• System applications
• Common faults and symptoms
Rotary / Distributor Pump System
Understand rotary fuel systems.
Topics
• Pump structure and operation
• Fuel distribution logic
• Timing and control
• Sensitivity to wear
• Common faults and issues
Cummins PT Fuel System
Understand PT system philosophy and diagnostics.
Topics
• PT system components
• Pressure-time principle
• Fuel metering behavior
• Governor control
• Common PT faults
Cummins Quantum Fuel System
Understand advanced Cummins electronic fuel systems.
Topics
• Quantum system concept
• Electronic fuel control
• High-pressure injection behavior
• ECM interaction
• Common faults and diagnostics
Electronic Unit Injector (EUI)
Understand electronic unit injector systems.
Topics
• Injector construction and operation
• Cam-driven pressure generation
• Electronic control
• Fuel quantity and timing
• Common faults
HEUI System
Understand oil-actuated fuel systems.
Topics
• HEUI components
• Hydraulic injection principle
• High-pressure oil system
• Oil-fuel interaction
• Common HEUI faults
Common Rail System
Understand modern fuel systems.
Topics
• Rail components and layout
• High-pressure pump operation
• Pressure control
• Injection strategies
• Common faults
Electronic Control Systems (ECM / PEEC)
Understand fuel system electronic control.
Topics
• ECM / ECU function
• PEEC system overview
• Sensors and inputs
• Actuators and outputs
• Electronic faults
Fuel System Testing, Inspection & Monitoring
Prepare participants for field diagnostics.
Topics
• Visual inspection
• Pressure and leakage awareness
• Performance monitoring
• Test interpretation
• Diagnostic preparation
Fuel System Faults, Diagnostics & Troubleshooting
: Develop structured troubleshooting skills.
Topics
• No start and hard start
• Low power issues
• Smoke and combustion faults
• Misfire and instability
• Root cause diagnostic logic
$200.00
