Charcoal canisteris a means of activated carbon filling the jar, used to switch off the engine when adsorbed from the fuel tank and carburetor of the gasoline vapor escape, the engine starts, and then adsorption of which combustion gas blow . Ignition system can be activated carbon emissions and a more critical system components.Ignition engine when the inhalation of the gas tanks of activated carbon through the carbon tank control valve into the engine intake manifold, the control valve EFI system through the control unit to determine their opening and closing, the extent of absorption. Activated carbon can reduce emissions to a large extent caused by air pollution.