Systems and methods for reducing airflow restriction through emissions control systems

摘要

A method for a fuel system is presented, comprising directing purge air through a first fuel vapor canister but not a second fuel vapor canister based on a load of the first fuel vapor canister being greater than a threshold. In this way, purging of the first canister may be prioritized and completed without passing desorbed fuel vapors through the second canister, thereby reducing the amount of time needed to purge the first canister, and reducing overall emissions.

主权项

1. A method for a fuel system, comprising:
directing purge air through a first fuel vapor canister but not a second fuel vapor canister based on a load of the first fuel vapor canister being greater than a threshold; and directing purge air through the second fuel vapor canister but not the first fuel vapor canister based on the load of the first fuel vapor canister being below the threshold.