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Engine Operation. 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. Three vital systems. Compression or Air. Fuel. Ignition or Fire. The Four Stroke Cycle. Intake Compression - PowerPoint PPT Presentation
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Engine Operation
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.
Three vital systems
Compression or Air
Fuel
Ignition or Fire
The Four Stroke Cycle
Intake Compression Power Exhaust
Intake
Intake valve opens
Air fuel mixture enters the cylinder
Piston moves down
Compression
Piston moves upward
Intake valve closed
Air-fuel mixture is compressed
Power Spark plug fires
Ignition proceeds
Piston is forced down
Exhaust Exhaust valve opens
Piston moves upward
Spent gas pushed into exhaust system
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
Fuel system diagnosis Is there gas in the tank?
Is there gas to the intake manifold?
Filters?
Pressure test?
Compression system Is the air filter clean?
Is the exhaust system flowing?
Compression Test
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?
Summary Objective Fuel Compression & Ignition Systems Four stroke cycle Diagnostics
Questions ????