Low emission adsorbent and canister system
AssigneeIngevity South Carolina, LLC
InventorsStephan Charles Cronin, Marta Leon Garcia, Laurence H. Hiltzik, Eyma Y. Marrero-Alfonso, Erik W. Versen, James R. Miller, Roger S. Williams
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Abstract
The present description provides low DBL bleed emission performance properties that allows the design of evaporative fuel emission control systems that are simpler and more compact than those possible by prior art by inclusion of a vent-side volume comprising a parallel passage adsorbent such as a carbon honeycomb with narrow channel width and low cell pitch.
Claims24
A parallel passage adsorbent volume (PPAV) comprising activated carbon, wherein the PPAV includes an outer surface and a plurality of parallel passages or channels extending therethrough parallel to the outer surface, and wherein the parallel passages or channels are configured to have an average channel hydraulic diameter (tc,Dh) of less than or equal to 1.25 mm, a hydraulic diameter cell pitch (CPDh) of less than or equal to 1.45 mm and, and wherein the PPAV is configured to be incorporated into a vehicle evaporative emission canister system.
A parallel passage adsorbent volume (PPAV) comprising activated carbon, wherein the PPAV includes an outer surface and a plurality of parallel passages or channels extending therethrough parallel to the outer surface, and wherein the parallel passages or channels are configured to have at least one of an average channel hydraulic diameter (tc,Dh) of less than or equal to 1.25 mm, a hydraulic diameter cell pitch (CPDh) of less than or equal to 1.45 mm or a combination thereof, and a butane working capacity (BWC) of less than 10 g/dL.
Dependencies are inferred from the claim text.