**Ingredient 2: Compression (updated) by Thomas Dougherty



Upon completion of this session, students will be able to identify air movement events in relationship with mechanical events within a four stroke cycle of a single cylinder internal combustion engine.

Students will be able to determine where an engine is in its cycle by looking at mechanical drawings and cutaway engines and explain which event is taking place at that time.

Students will understand the minimum compression needs for internal combustion with gasoline and acceptable cylinder compression variances.

Students will perform cranking compression tests and cylinder leakage tests to determine the cause of failure.

Lecture / Lab

2 class periods
2 Hours

Industries / Subjects / Grades

Industries / Pathways
  • Transportation Transportation

Standards and Objectives


California's 2008 CTE Standards (15)
California Academic Content Standards (2)

Related Instructional Objectives (SWBAT...)

  • Identify air movement events in relationship to mechanical events in an internal combustion engine.
  • Determine where an engine is in it's four stroke cycle and which events should be taking place.
  • Understand compression needs of a gasoline engine.
  • Perform cranking compression test to determine compression.
  • Perform cylinder leakage test to determine cause of failure.

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