Emission control system with resonant frequency measurement and methods for use therewith
AssigneeAdvanced Technology Emission Solutions Inc.
InventorsRobin Crawford, John Douglas
Life of this patent
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Abstract
Aspects of the subject disclosure may include, for example, an emission control system that includes an emission control device having a plurality of passages to facilitate emission control of an exhaust gas from a vehicle engine. A controller generates a control signal to control induction heating of the emission control device and determines a resonant frequency of a coil. An alternating current (AC) source responds to the control signal by generating a power signal applied to the coil to cause the induction heating of the emission control device, wherein a frequency of the power signal is selected based on the resonant frequency of the coil.
Claims16
An emission control system comprising:
- an emission control device having a plurality of passages to facilitate emission control of an exhaust gas from a vehicle engine;
- a controller that generates a control signal to control induction heating of the emission control device, determines a resonant frequency of a coil and selects a frequency of a power signal, based on the resonant frequency of the coil, wherein the controller determines the resonant frequency of the coil by iteratively adjusting the frequency of the power signal to a plurality of candidate frequencies, measuring an amount of power transferred to the coil at the plurality of candidate frequencies and determining the resonant frequency of the coil by selecting one of the candidate frequencies corresponding to a peak in the amount of power transferred to the coil;
- and
- an alternating current (AC) source that responds to the control signal by generating the power signal and coupling the power signal to the coil to facilitate the induction heating of the emission control device.
A method comprising:
- determining, via a controller, a resonant frequency of a coil;
- selecting, via the controller, a frequency of a power signal based on the resonant frequency of the coil, wherein the controller determines the resonant frequency of the coil by iteratively adjusting the frequency of the power signal to a plurality of candidate frequencies, measuring an amount of power transferred to the coil at the plurality of candidate frequencies and determining the resonant frequency of the coil by selecting one of the candidate frequencies corresponding to a peak in the amount of power transferred to the coil;
- generating, via the controller, a control signal to control induction heating of an emission control device;
- and
- generating, via an alternating current (AC) source and responsive to the control signal, a power signal applied to the coil in proximity to the emission control device to cause the induction heating of the emission control device.
Dependencies are inferred from the claim text.