Engine Performance Monitoring & Analysis
| Parameter | Formula |
|---|---|
| Adiabatic Flame Temp | Tflame ≈ 3,400°F (stoichiometric, natural gas) |
| Exhaust Gas Temp | Texh = Tambient + (Tflame - Tambient) × (1 - η) |
| Equivalence Ratio | φ = 1 / (1 + ExcessAir/100) |
| Thermal Efficiency | η = f(engine type, load, boost) |
Understand exhaust gas temperature monitoring and engine performance analysis
Typical EGT ranges vary by engine type: 2-stroke slow-speed engines run 500-700 degrees F, 4-stroke medium-speed engines 700-1000 degrees F, and 4-stroke high-speed engines 900-1200 degrees F. Temperatures above these ranges may indicate combustion or mechanical issues.
EGT monitoring helps detect combustion problems, fuel system issues, and mechanical wear before they cause engine damage. Abnormal EGT readings or excessive cylinder-to-cylinder spread can indicate failing valves, injector problems, or turbocharger degradation.
High EGT can be caused by rich air-fuel mixtures, excessive engine loading, restricted airflow, turbocharger inefficiency, retarded ignition timing, or intercooler fouling. Sustained high EGT accelerates component wear and can lead to engine failure.