| CPC F02D 41/003 (2013.01) [B01D 53/0415 (2013.01); B01D 53/0438 (2013.01); B01D 53/0446 (2013.01); F02M 25/0836 (2013.01); F02M 25/0854 (2013.01); B01D 2253/102 (2013.01); B01D 2257/702 (2013.01); B01D 2259/402 (2013.01); B01D 2259/4009 (2013.01); B01D 2259/4516 (2013.01); B01D 2259/4566 (2013.01); F02M 2025/0881 (2013.01)] | 20 Claims |
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1. A vehicle comprising:
an engine configured to propel the vehicle;
a fuel tank configured to store fuel;
a primary canister (i) in fluid communication with the fuel tank and (ii) configured to receive and store evaporated fuel from the fuel tank;
a first valve disposed between the fuel tank and the primary canister;
a second valve disposed between the primary canister and ambient surroundings;
a third valve disposed between the primary canister and the engine;
a heater disposed within the primary canister;
a secondary canister (i) in fluid communication with the primary canister, (ii) configured to receive and store the evaporated fuel from the fuel tank, and (iii) disposed between the primary canister and the second valve; and
a controller programmed to, in response to a command to purge the primary and secondary canisters,
close the first, second, and third valves and activate the heater to heat the primary canister,
heat the secondary canister via opening the first valve, while the second and third valves remain closed and while the heater is activated, to (i) force air from the fuel tank toward the primary canister and (ii) force heated air from the primary canister toward the secondary canister, and
after heating the secondary canister, open the second and third valves to purge the evaporated fuel from the primary and secondary canisters to the engine.
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