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Emission control system with resonant frequency measurement and methods for use therewith

  • US 10,590,819 B2
  • Filed: 02/27/2018
  • Issued: 03/17/2020
  • Est. Priority Date: 09/18/2013
  • Status: Active Grant
First Claim
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1. 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.

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