Emission Control Systems
The emission control system prevents the fuel vapors generated in the fuel tank from escaping to the atmosphere. The emission control systems designed as integral parts of the operation of the engine.The antipollution devices used were installed as add on components. The system work closely with other systems as the fuel, ignition,and exhaust systems. The engine operations are controlled by the emission control system. This closer integration of systems disconnecting or not maintaining the emission control systems can adversely effect the engine performance, life, and the fuel economy.
The most frequent cause of the emission problems, loose or broken vaccum hose or wire, you must check hoses, wires and connectors before performing major repairs.
Emission Control System Result
The result of emission system is to reduce the carbon monoxide, the pollutants into the air what you called the hydrocarbons, and oxides of nitrogen.
EMISSION CONTROL SYSTEM COMPONENTS
Every time when the car owner bring me his car for oil change he ask me to adjust for him the fuel consumption. With the new technology today the engines they can adjust themselves for their emission. The car designer put in place an oxygen sensor. This sensor control the level of the fuel must be used by the engine. The sensor transmit that information to the computer to adjust the amount of the fuel must be sent to the engine cylinders. This technology is used on the airplane but today is used on the cars too. The newest vehicles are equipped with different types of sensors and each one of this sensors has his own functions. I am sure you want to save money fixing your vehicle, so you must be sure about what car are you driving. knowing that you not going to be charged extra money. The components the most important on your vehicle emission control are:
Exhaust Gas Recirculation ( EGR )
The EGR is system used to reduce oxides of nitrogen emitted from the exhaust. The oxides of nitrogen they take place on high temperature, occurs when the peak temperature period of the combustion process. To reduce peak temperatures, and oxides of nitrogen, small quantity of exhaust gas is used from the exhaust system and recirculated in the combustion cycle. The malfunctioning EGR system can affect the performance of your vehicle engine. Your car engine problems associated with the EGR system are : Rough engine performance upon light throttle application and stalling on deceleration. Rough idling or stalling when at an idle.
Positive Crankcase Ventilation ( PVC )
The PVC system reduces hydrocarbon emissions by circulating fresh air through the crankcase. This air combines with blow by gases, or gases blown past the piston rings during compression. The combination is sucked into the intake manifold to be burned again by your car engine. This system must be checked regularly because the carbon and gunk deposited can eventually block the PVC valve. If the flow of the PVC system is reduced or stopped, the common problems are rough idling or reduced your vehicle engine speed at idle.
Evaporative Emission Control ( EEC )
The evaporative emission control system is designed to prevent the release of hydrocarbons in the form of fuel into the atmosphere. This is happen by venting the vapor in the fuel tank to a canister filled with activated charcoal, where the vapor is stored when your car isn’t running. When you start your car fresh air is drawn into the canister. This fresh air picks up the stored vapors and carries them to the intake manifold. When your car is idling there is enough suction coming through the constant purge line to draw in a small amount of this air vapor mixture through the constant purge orifice. When your car engine speed increases the manifold vacuum open the diaphragm of the purge control valve allows the air vapor mixture to be drawn to the intake manifold.
Inside silencer exhaust system the catalytic converter device is fitted. It is made with special material ceramic cores coated with platinum palladium function as catalysts to burn any combustible elements setting or remaining in the exhaust gases. the carbon monoxide is changed into water and the hydrocarbons are changed into carbon dioxide.
Emission Control System Diagnostic
When you have problem in your car for emission control system, you going to see in your car dashboard light on . The computer set a fault code and stored. The fault can be cancelled by using OBD II machine. On this store you can find trouble code machine and charcoal canister click here .
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