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2 min read
An Emission Control System is designed to limit the release of harmful substances like carbon monoxide, hydrocarbons,
and nitrogen oxides from an internal combustion engine into the atmosphere. These systems are crucial for reducing air
pollution and meeting governmental emission standards.
Catalytic Converter: A device that converts harmful gases into less harmful substances through chemical reactions. For
instance, it turns carbon monoxide into carbon dioxide.
Oxygen Sensor: A sensor that measures the amount of oxygen in exhaust gases, which helps to manage the air-fuel mixture
in the engine for optimal performance and reduced emissions.
EGR Valve (Exhaust Gas Recirculation Valve): Redirects a portion of exhaust gases back into the engine’s combustion
chamber, reducing nitrogen oxide emissions.
Air Pump: Helps to inject fresh air into the exhaust stream, aiding in the oxidation of pollutants.
Fuel Vapor Recovery System: Captures fuel vapors before they can escape into the atmosphere, often stored in a charcoal
canister and later used in the engine.
Selective Catalytic Reduction (SCR): Uses a chemical, often urea, to break down NOx emissions into nitrogen and water.
Diesel Particulate Filter (DPF): Filters and stores exhaust soot, which is later burnt off to convert the soot to ash.
Lean NOx Trap (LNT): A system specifically designed to absorb NOx emissions when the air-fuel mixture is lean (more air
In essence, the Emission Control System works in concert with the engine management system. Sensors monitor emissions
and adjust the engine’s operations to minimize pollutants. This data is continuously sent to the Engine Control Unit (ECU), which adjusts the air-fuel mixture and ignition timing to reduce emissions effectively.
Regular checks and maintenance of the Emission Control System can improve both engine efficiency and environmental
impact. Failure to maintain this system can result in poor performance and could lead to hefty fines due to violation of
emission norms. Read more on how you can implement green transportation solutions.
Understanding the Emission Control System is essential for anyone using or maintaining vehicles or industrial engines, especially if you're considering transitioning to a Zero Emission Vehicle.
By learning the components and types of systems available, you can make informed decisions that benefit both your engine's performance and reducing your Carbon Footprint.
Whether you're a beginner or an intermediate learner, knowing how to maintain and operate these systems can have
long-lasting benefits for air quality and overall health.
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