Fugitive hydrocarbon treatment module for internal combustion engine air intake system

An engine air induction system having a hydrocarbon treatment module for controlling the emission of fugitive hydrocarbons from the air intake system other interior portions of an engine, with said module comprising a monolithic substrate having a zeolite washcoat, with said substrate being positioned in the air intake system such that all air flowing through the engine passes through the cells of the substrate, both when the engine is operating, and when the engine is shut down.

A method for controlling the emission of fugitive hydrocarbons from the air induction system and interior of an internal combustion engine, comprising the steps of:

• causing fugitive hydrocarbons backflowing from the engine's air induction system when the engine is shut down to flow through, and be adsorbed upon, a zeolite containing adsorber;
• and
• causing all combustion air entering the engine when the engine is operating to flow through said adsorber, so as to desorb and induct previously adsorbed hydrocarbons.

A combination throttle body, air meter, and induction system hydrocarbon module for an internal combustion engine, comprising:

• a total flow hydrocarbon treatment module positioned in the air induction system such that all gases flowing both to and from the engine through the air intake system are caused to flow through the hydrocarbon treatment module;
• an airflow meter positioned between the hydrocarbon treatment module and the engine such that all air flowing into the engine is caused to flow through the flow meter;