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AssigneeAdvanced Technology Emission Solutions Inc.
InventorsRobin Crawford, John Douglas
Estimating the term…
An assembly for treating gaseous emissions has a substrate with cells for the passage of an emissions gas to be treated and inductive heating elements located in some of the cells. An electromagnetic field generator mounted near the substrate generates a varying electromagnetic field, so as to inductively heat the inductive heating elements and so heat the substrate. Some of the inductive heating elements have a first natural resonant frequency other inductive elements have a second natural resonant frequency different from the first resonant frequency. A power supply for the electromagnetic field generator is operated with a frequency closer to the first resonant frequency for a time and is operated with a frequency closer to the second resonant frequency period for a subsequent time period. By switching between the frequencies at different times, the heating profile can be moved in the substrate.
An assembly for treating gaseous emissions comprising a substrate body having a plurality of cells for the passage of emissions gas to be treated, an elongate inductive heating element contained in each of a first set of the plurality of cells but not in a second set of the plurality of cells, the first set being less in number than the second set, and an electromagnetic field generator mounted adjacent the substrate body for generating a varying electromagnetic field, thereby inductively to heat the inductive heating elements and thereby to heat the substrate body, wherein the inductive heating elements of a first group thereof have a first resonant frequency and the inductive elements of a second group thereof have a second resonant frequency different from the first resonant frequency, the electromagnetic field generator including a controller for generating the varying electromagnetic field at a frequency closer to the first resonant frequency than the second resonant frequency for a first time period and for generating the varying electromagnetic field at a frequency closer to the second resonant frequency than the first resonant frequency for a subsequent second time period.
An assembly for treating gaseous emissions comprising a substrate body having a plurality of cells for the passage of emissions gas to be treated, an elongate inductive heating element contained in each of a first set of the plurality of cells but not in a second set of the plurality of cells, the first set being less in number than the second set, and an electromagnetic field generator mounted adjacent the substrate body for generating a varying electromagnetic field, thereby inductively to heat the inductive heating elements and thereby to heat the substrate body, wherein at least one of the inductive heating elements has a material composition that varies along its length whereby a first part of said inductive heating element has a first resonant frequency and a second part of the elongate inductive heating element has a second resonant frequency different from the first resonant frequency, the electromagnetic field generator including a controller for setting the frequency of the varying electromagnetic field closer to the first resonant frequency than the second resonant frequency for a first time period and for setting the frequency of the varying electromagnetic field closer to the second resonant frequency than the first resonant frequency for a subsequent second time period.
A method of treating gaseous emissions using a substrate body having a plurality of cells for the passage of emissions gas, an elongate inductive heating element contained in each of a first set of the plurality of cells but not in a second set of the plurality of cells, the first set being less in number than the second set, and an electromagnetic field generator mounted adjacent the substrate body for generating a varying electromagnetic field, thereby inductively to heat the inductive heating elements and thereby to heat the substrate body, wherein a first group of the inductive heating elements has a first resonant frequency and a second group of the inductive heating elements has a second resonant frequency different from the first resonant frequency, the method comprising setting a frequency of the varying electromagnetic field closer to the first resonant frequency than the second resonant frequency for a first time period and setting the frequency of the varying electromagnetic field closer to the second resonant frequency than the first resonant frequency for a second time period.
Dependencies are inferred from the claim text.