Fuel system for a vehicle and method of controlling
AssigneeFord Global Technologies, LLC
InventorsAed Dudar, Dennis S. Yang
Life of this patent
Estimating the term…
Abstract
A method of controlling an evaporative emissions system for a vehicle is provided. A fuel system for a vehicle and a vehicle are also provided. A signal indicative of an entry condition associated with a secondary air flow path for a purge of an evaporative emissions canister is received. A filter is decoupled from a port of the evaporative emissions canister in response to receiving the signal and prior to the evaporative emissions canister purge. The evaporative emissions canister is purged by flowing atmospheric air into the port and through the evaporative emissions canister while the filter is decoupled from the port. The filter is coupled to the port of the evaporative emissions canister after purging the canister.
Claims20
A method of controlling an evaporative emissions system for a vehicle, the method comprising:
- receiving a signal indicative of an entry condition associated with a secondary air flow path for a purge of an evaporative emissions canister;
- decoupling a filter from a port of the evaporative emissions canister in response to receiving the signal and prior to the purge of the evaporative emissions canister;
- purging the evaporative emissions canister by flowing atmospheric air into the port and through the evaporative emissions canister while the filter is decoupled from the port;
- and
- coupling the filter to the port of the evaporative emissions canister after purging the canister.
A fuel system for a vehicle comprising:
- a fuel tank having a fuel fill port with a closure member;
- an evaporative emissions canister having a first port fluidly coupled to the fuel tank to receive vapor therefrom and a second port, the canister positioned between an air intake for an engine and a vent to atmosphere;
- and
- a filter supported by a bracket for movement between a first position and a second position, the filter fluidly coupling the second port of the canister to the vent in the first position, and the filter spaced apart from and decoupled from the second port of the canister in the second position such that the second port of the canister is in fluid communication with atmosphere;
- and
- a controller configured to:
- receive a first signal indicative of an entry condition associated with a secondary air flow path for a purge of an evaporative emissions canister, send a second signal with instructions to decouple the filter from the second port of the evaporative emissions canister in response to receiving the first signal and during the purge of the evaporative emissions canister, and send a third signal with instructions to couple the filter to the second port of the evaporative emissions canister after the canister is purged.
A vehicle comprising:
- an engine having an air intake;
- a fuel tank with a fuel fill port and a closure member movable between a closed position to cover the fuel fill port and an open position to fuel the fuel tank via the fuel fill port;
- an evaporative emissions canister having a first port fluidly coupled to the fuel tank to receive vapor therefrom and a second port, the canister fluidly connecting the air intake to a vent to atmosphere;
- a filter supported by a bracket for movement between a first position and a second position, the filter fluidly coupling the second port of the canister to the vent in the first position, and the filter spaced apart from and decoupled from the second port of the canister in the second position;
- and
- a controller configured to:
- receive a first signal indicative of an entry condition associated with a secondary air flow path for a purge of an evaporative emissions canister, send a second signal with instructions to decouple the filter from the second port of the evaporative emissions canister in response to receiving the first signal and during the purge of the evaporative emissions canister, and send a third signal with instructions to couple the filter to the second port of the evaporative emissions canister after the canister is purged.
Dependencies are inferred from the claim text.