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Wednesday, 8 April 2015

How Emission Control System Works?

Emissions

Working Of Emission Control System In Car

Helpful Information

Emission control systems have been incorporated into automobiles to prevent pollution by limiting the amount of partially burned and evaporated gases into the atmosphere. These systems have been efficient in reducing the air pollution caused by automobiles to a large extent. Increased engine efficiency and lighter vehicle construction has also contributed to helping reduce emissions. The different aspects of emissions are tailpipe emissions, life cycle emissions and evaporative fuel emissions.
Unspent fuel vapors are known as the main contributors to air pollution. These omitted gases consist of carbon monoxide, hydrocarbons, carbon dioxide and nitrogen oxide.
Lifecycle emissions are byproducts which are released into the environment during the manufacturing, maintenance and disposal of the vehicle. These products include volatile solvents such as auto paint and lubricants, manufacturing plant waste, petroleum, heavy metals and many more. The name "catalytic converter" was derived from the operation the device performs. A catalyst material converts partially burned gases to completely burned gases.
History
Automobiles were first manufactured with exhaust emissions control systems in 1966. Since then, technology has undergone several advancements that have increased the efficiency of the internal combustion engine. Older emission control systems inject air into the exhaust manifold which are known as, air injection reactor (AIR.) The catalytic converter was developed in the early 1970's when severe air pollution was widespread and was made mandatory by the US government in 1976. An EGR valve is used is to lower KNOX (NO2) gases which occur when the combustion chamber when temperature reaches over 3500°.
Tailpipe emission are measured in parts per million or PPM. The first smog emission test was conducted in the mid 1980's. Restrictions in smog laws came later which ushered in the use of a dynamometer so vehicles could be tested as if they were being driven, the number of gases measured also increased.

Step by step guide on how automotive emissions systems work. This article pertains to all vehicles except electric.

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