Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
Publisher: Cengage Learning
ISBN: 9781133612315

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
Publisher: Cengage Learning
ISBN: 9781133612315


Chapter 4, Problem 2RQ
Textbook Problem

Explain the four strokes of the internal combustion engine.

Expert Solution
To determine

Explanation on the four strokes of an internal combustion engine.

Explanation of Solution

In an internal combustion engine, the piston performs four different strokes to complete one operating cycle. Each stroke consists of 180° of crankshaft rotation and hence, a four-stroke cycle is completed through 720° of the crankshaft. The different strokes of the piston are intake, compression, power, and exhaust. The working principle of each stroke of an internal combustion engine is as follows:

  1. Intake: In this stroke, the piston is at the top dead center and is about to move downwards. During intake or suction stroke, the inlet valve opens and the exhaust valve remains closed. As the piston moves downwards, suction is created which allows an air-fuel mixture to be drawn into the cylinder. This stroke completes when the piston reaches the bottom dead center.
  2. Compression: This stroke starts when the piston reaches the bottom dead center and completes at top dead center...

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