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The Air Pump, also known as the smog pump, was created to provide new, clean, and pressured oxygen into the exhaust stream. Since exhaust gases are hot as they leave, injecting oxygen at this point permits unburned hydrocarbons to be burnt as they travel down the exhaust system and eventually out the tailpipe. An air pump is a component in the secondary air injection system designed to operate continuously. This mechanism is essential in assisting automobiles in meeting government emission regulations.