Patent ID: 9188090
Filing Date: 2015-11-17
Classification: F02D,F02M

Abstract:
1. A method for an engine with a fuel vapor recovery system, comprising: directing air through a first set of adsorbent passages in a fuel vapor canister to purge fuel vapor therefrom while not directing air through a second set of adsorbent passages in the fuel vapor canister in response to a fuel vapor purging initiation event; directing air through the second set of adsorbent passages to purge fuel vapor therefrom while not directing air through the first set of adsorbent passages in response to an amount of fuel vapor in the first set of passages being less than a first threshold, the first and second sets bundled in a hexagonal box-shape in a common housing of the canister, wherein the first and second set of adsorbent passages are arranged around the circumference of an exterior wall of a central adsorbent passage in the fuel vapor canister; directing air through a select first number of consecutive passages of the second set of adsorbent passages arranged around the circumference of the exterior wall of the central adsorbent passage, the first number of consecutive passages less than a total number of passages of the second set of adsorbent passages, and not directing air through all other passages of the first and second sets of adsorbent passages in response to a second amount of fuel vapor in the second set of passages less than a second threshold; and progressively directing air through a next, different select first number of consecutive passages of the first and second set of adsorbent passages and not directing air through all other passages of the first and second sets of adsorbent passages until all passages of the first and second set of adsorbent passages are progressively purged.