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US 2017/0370306 A1Published application
Systems and methods for targeted heating in an evaporative fuel vapor canister purge
AssigneeFord Global Technologies, LLC
InventorsAed M. Dudar, Robert Roy Jentz, Douglas Raymond Martin
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Abstract
Methods and systems are provided for an ultrasonic wave generator within a vehicle emissions control system. In one example, a frequency of ultrasonic waves may be applied to a fuel vapor canister, the frequency adjusted in response to an estimate of hydrocarbon distribution within a vapor canister received from temperature and hydrocarbon sensor outputs.
Claims20
A method comprising:
- adjusting a frequency and/or amplitude of ultrasonic waves applied to a fuel vapor canister of a vehicle based on an operating condition.
A method comprising:
- adjusting a frequency and/or amplitude of ultrasonic waves applied to a fuel vapor canister of a vehicle based on relative canister loading in different regions of the canister.
A system, comprising:
- a fuel system having a canister and an ultrasonic wave generator;
- and
- a controller coupled to the wave generator with memory having instructions stored therein for during a first purging event, generating a first frequency and then a second, higher frequency;
- and during a second purging event, generating a third frequency and then a fourth, lower frequency.
1 more element
Dependencies are inferred from the claim text.