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US 12,292,019 B1Granted
Methods and systems for fuel system including dual parallel fuel vapor canisters
AssigneeFord Global Technologies, LLC
InventorAed Dudar
Life of this patent
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Abstract
Methods and systems are provided for an evaporative emission fuel (EVAP) system. In one example, a system for the EVAP system includes a delta pressure sensor arranged between a first purge line coupled to a first canister and a second purge line coupled to a second canister arranged in parallel with the first canister.
Claims20
A system, comprising:
- a first canister arranged in parallel with a second canister;
- a first purge line coupled between the first canister and an engine, and a second purge line coupled between the second canister and the engine;
- a first vent line coupling the first canister to atmosphere and a second vent line coupling the second canister to atmosphere;
- and
- a delta pressure sensor coupled to the first purge line and the second purge line.
2 more elements
A method, comprising:
- oscillating a canister vent valve of a less loaded canister during purging of at least two canisters arranged in parallel between an open position and a closed position, wherein a load of the at least two canisters is comparatively measured via a delta pressure sensor arranged between purge lines of the at least two canisters.
A system, comprising:
- a first canister arranged in parallel with a second canister;
- a delta pressure sensor coupled to purge lines of the first canister and the second canister, the purge lines of the first canister and the second canister fluidly coupled to an engine;
- and
- a controller comprising instructions in memory that cause the controller to oscillate a canister vent valve between an open position and a closed position of a less restricted of the first canister and the second canister during a purging event, the less restricted of the first canister and the second canister determined based on a pressure differential sensed by the delta pressure sensor.
1 more element
Dependencies are inferred from the claim text.