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Understanding Engine Operation: Vital Systems & Diagnostic Procedures

DESCRIPTION

This lesson focuses on the essential components of engine operation, specifically the three vital systems: Fuel, Compression (Air), and Ignition (Fire). You will learn the basics of how an engine operates through the four-stroke cycle: Intake, Compression, Power, and Exhaust. We delve into diagnostic routines to help identify issues within these systems. Topics covered include fuel flow, compression testing, and ignition system checks, ensuring a thorough understanding of engine performance and troubleshooting methods.

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Understanding Engine Operation: Vital Systems & Diagnostic Procedures

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Presentation Transcript

  1. Engine Operation

  2. Objective The objective of this lesson is to: • Learn the three vital systems. • Understand the basic operation of an engine. • Diagnose problems in the system.

  3. Three vital systems • Compression or Air • Fuel • Ignition or Fire

  4. The Four Stroke Cycle • Intake • Compression • Power • Exhaust

  5. Intake • Intake valve opens • Piston moves down • Air fuel mixture enters the cylinder

  6. Compression • Intake valve closed • Piston moves upward • Air-fuel mixture is compressed

  7. Power • Spark plug fires • Ignition proceeds • Piston is forced down

  8. Exhaust • Exhaust valve opens • Piston moves upward • Spent gas pushed into exhaust system

  9. Diagnosis We now look back at the three vital systems to establish a diagnostic routine for the engine. • Fuel • Compression or Air • Ignition or Fire

  10. Fuel system diagnosis • Is there gas in the tank? • Is there gas to the intake manifold? • Filters? • Pressure test?

  11. Compression system • Is the air filter clean? • Is the exhaust system flowing? • Compression Test

  12. Ignition System • Is there spark at the spark plug? • Is there spark from the coil? • Is there power to the coil? • Results of a system diagnostic test?

  13. Summary • Objective • Fuel Compression & Ignition Systems • Four stroke cycle • Diagnostics

  14. Questions ????

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