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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

Name the three types of emissions being controlled in gasoline engines.

To determine

The three different types of emissions being controlled in gasoline engines.

List of three different types of emission control are:

  1. Evaporative control
  2. Pre-combustion control
  3. Post-combustion control

Emission in gasoline engine is controlled by:

1. Evaporative control:

  • They are designed to provide a complete sealing of the emission.
  • They help in controlling the system by trapping the vapors formed after the burning of the fuel.
  • It helps in escaping the gases from the fuel delivery system.
  • They help in producing less pollutants to the environment.

2. Pre-combustion control:

  • This helps in protecting the engine as it prohibits the emission from entering the engine.
  • This may occur before or after the combustion cycle.
  • Examples of this system are − PCV, Spark control, and EGR system.

3. Post-combustion control:

  • They help in cleaning the exhaust gases produced after the burning of fuels.
  • They involve chemical reaction to remove harmful gases.
  • Fresh air is injected into the exhaust chamber to reduce the components of CO and HC.
  • They form water and carbon dioxide when oxygen comes in contact with the exhaust gases.
  • This process helps in reducing components of NOx.
Explanation

Emission in gasoline engine is controlled by:

1. Evaporative control:

  • They are designed to provide a complete sealing of the emission.
  • They help in controlling the system by trapping the vapors formed after the burning of the fuel.
  • It helps in escaping the gases from the fuel delivery system.
  • They help in producing less pollutants to the environment.

2. Pre-combustion control:

  • This helps in protecting the engine as it prohibits the emission from entering the engine.
  • This may occur before or after the combustion cycle...

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