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Mercury Emissions Monitoring Article
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What Is An Emissions Control Unit
from:An emissions control unit is any of several miscellaneous emissions control devices that may be installed on a car, truck, SUV, van, ATV, boat, aqua/marine vehicle, aviation vehicle, business or commercial vehicle or any other contributing source of pollution emissions.
Let’s break down the label, “emissions control unit” so as we may define the use of the label correctly. First, let’s look at emissions control, “the attempt to limit or eliminate pollution causing emissions produced by a specific contributing source”. Now let’s define unit. This use of unit may be defined as, “a part or individual apparatus that performs a single specific function”. When we combine the two individual definitions, we get the following, “an individual apparatus that performs a specific function in the attempt to limit or eliminate the pollution causing emissions produced by a specific contributing source”.
Examples of an emissions control unit would be any of the following automobile emissions control system parts: the PCV (Positive Crankcase Ventilation) valve, the vacuum reservoir, the vapor canister, the purge control valve, the EGR (Exhaust Gas Return) valve, oxygen sensors, the catalytic converter, the muffler, tailpipe and the ECM (Electronic Control Module).
All of these emissions control units are only parts of multi-unit systems. For example, one of the multi-unit systems that some of these emissions control units are parts of would be the exhaust system, which consists of no less than the EGR valve, oxygen sensors, the catalytic converter, muffler and tailpipe. Another of the multi-unit systems that some of these emissions control units are a part of is the evaporative emissions system. The evaporative emissions system is made up of no less than the PCV valve, vacuum reservoir and the purge control valve.
Some of the more important emissions control units are the PCV valve, the EGR valve, oxygen sensors, vapor canister, catalytic converter and the ECM. These emissions control units are important because they serve functions that help to limit reduce or eliminate some of the more dangerous, toxic and harmful of the emissions gasses and/or pollution contributing factors.
To sum up what we have talked about in this article, an emissions control unit may be defined as, “an individual apparatus that performs a specific function in the attempt to limit or eliminate the pollution causing emissions produced by a specific contributing source”. The PCV valve, vacuum reservoir, vapor canister, purge control valve, EGR valve, oxygen sensors, catalytic converter, muffler, tailpipe and ECM (Electronic Control Module) are all examples of emissions control units that are parts of multi-unit systems.
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