Those who are new with automobile or
automotive engines have to know that there are three main control systems in
each vehicle to control emissions of pollutants. These three control systems
are discussed below:
b. The Control System of Crankcase Emission: Blow by gases escaped from your engine try to find out their way through crankcase. The crankcase emission control system aids to send them back into the engine to burn them. The main purpose of this system is to resist escaping of blow by gases.
c. Evaporative Emission Control System: Do you know your engine fuel tries to escape from your fuel system in the vapor form? Actually, fuel vapors try to escape through carburetor blow vents, fuel tank, and air cleaner. In a typical carbureted vehicle, fuel vapors are ducted to canisters, which contain activated carbon to absorb these vapors. During certain operational mode of your engine, the canister draws fresh air and pulls the pulls the fuel vapor into the engine to burn.
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