Automotive engine exhaust aftertreatment system including hydrocarbon adsorber with internal engine purge flow control

摘要

An automotive internal combustion engine is equipped with a hydrocarbon adsorber for the purpose of controlling the emission of unburned hydrocarbons from the vehicle's tailpipe. Regeneration of the adsorber is achieved by an electronic engine controller operating a purge air system for drawing desorbed hydrocarbon material into the engine's intake.