Natural Gas Engines

Course Outline

The NGE course is ideal for employees who are new to the world of midstream gas compression. It provides a great foundation and overview of industrial, stationary gaseous fueled engines. Here, the attendees learn the fundamentals (2 and 4-stroke cycle theory) as well as how all the major engine systems interact.

The only prerequisite for NGE is a mechanical aptitude and an interest in learning! This course is available as either a fast-paced 3 day seminar, or as the full 4.5 day course (recommended) including daily homework and student materials. Caterpillar, *Waukesha, Ajax and other engine examples are referenced throughout.

The difference between this course and the GETM course is that the NGE course focuses more on the fundamentals. The GETM is more intense, faster paced, and focuses more on the details of maintenance and troubleshooting, substituting higher level information rather than the basics addressed in NGE.

  • Basic engine (core) components
  • 2-stroke and 4-stroke cycle theory
  • Banks, cylinder numbering, rotation, mating cylinders, etc.
  • Overview of popular Cat and Waukesha models
  • Jacket and auxiliary engine cooling circuits
  • Coolant
  • Heat transfer
  • Cooling system fundamentals
  • Basic system service
  • Fuel composition in gas compression
  • Understanding WKI and Methane Number
  • Fuel sampling
  • Normal combustion, detonation, and preignition
  • Stoichiometric, rich, and lean air fuel ratios and concepts
  • Atmospheric chemistry / smog formation
  • On-engine fuel systems hardware and controller identification
  • Carburetor and regulator function
  • Minor adjustment concepts (gas over air, etc.) and effects
  • Purpose and fundamentals of EGA analyzers and analysis
  • Lube oils and their function
  • Sampling best practices
  • Oil analysis
  • Sample results: wear metals and results compared to manufacturers’ published (TSB) specifications
  • Engine lube oil circuits and hardware
  • Filtration
  • Spark timing
  • Spark plugs and analysis
  • Magneto operation/function
  • Electronic ignition systems

  • Air intake
  • ​Exhaust system
  • Turbochargers
  • Intercooler (aftercooler)
  • Crankcase breathers and adjustment
  • Finding manufacturers’ technical information (TSBs, manuals, websites)

* Waukesha is a trademark

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