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Unit 1  Principles of Internal Combustion Engines

As a heavy-vehicle mechanic, you are concerned with repairing and replacing worn or broken parts, making various adjustments to vehicles and equipment, and ensuring that they are serviced properly and inspected regularly. To perform these duties intelligently, you must fully understand the operation and function of the various components of an internal combustion engine. This makes your job of diagnosing and correcting troubles much easier. This, in turn, saves time, effort, money, and lives.

This unit discusses the theory and operation of an internal combustion engine. You also need to become familiar with the terms being used.

1-1 Internal Combustion Engine

Learning Objectives:  Identify the series of events, as they occur, in both a gasoline engine and a diesel engine. Describe the differences between a four-stroke cycle engine and a two-stroke cycle engine.

1-2 Classification of Engines

Learning Objectives:  Recognize the differences in the types, the cylinder arrangements, and the valve arrangements of internal combustion engines.

1-3 Engine Measurements and Performance

Learning Objectives:  Identify terms, engine measurements, and performance standards of an internal combustion engine.

David L. Heiserman, Editor

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All Rights Reserved

Revised: June 06, 2015