Throttle body with hydrocarbon adsorber

Details Throttle body with hydrocarbon adsorber Throttle body with hydrocarbon adsorber

2007-05-08

2007-05-08

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

C123S518000

Reexamination Certificate

active

11032259

ABSTRACT:
A hydrocarbon adsorber system in accordance with the invention comprising a carbon adsorber element installed in a throttle body of an internal combustion engine. The element may be installed on a wall or in a groove in the wall of the throttle throat at a location immediately upstream (outside) the throttle blade in the air flow direction, and/or an element may be installed on the downstream surface of the throttle blade itself. When an engine is shut down, the engine throttle normally remains slightly open. Any hydrocarbon emissions must pass through this slight opening, and applying carbon adsorbers to these locations takes advantage of proximity to such an opening, as any hydrocarbon emissions must pass close by the carbon adsorbers and thus have a much-increased probability of being adsorbed, in comparison with prior art more general carbon adsorption sites.

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