Systems and methods for heating a honeycomb body

    公开(公告)号:US12286916B2

    公开(公告)日:2025-04-29

    申请号:US17770159

    申请日:2020-10-26

    Abstract: An electrical heater and method for heating a catalyst. The electrical heater includes a honeycomb body having a central axis extending longitudinally therethrough. The honeycomb body includes a matrix of intersecting walls forming a plurality of cells extending axially through the honeycomb body. A plurality of electrodes are positioned about an outer periphery of the honeycomb body. The plurality of electrodes are arranged into a plurality of pairs of electrodes that comprises at least a first pair of electrodes and a second pair of electrodes. Each pair of electrodes includes a first electrode and a second electrode. An electrode length of the electrodes along the outer periphery is proportional to a central current path length between center points of the electrodes of that pair of electrode. The electrode lengths of the electrodes of the first and second pairs of electrode are different.

    SYSTEMS AND METHODS FOR ELECTRICALLY HEATING A CATALYST WITH A HONEYCOMB BODY HAVING RADIAL WALLS

    公开(公告)号:US20220338307A1

    公开(公告)日:2022-10-20

    申请号:US17640930

    申请日:2020-09-09

    Abstract: An electrical heater and a method of heating a catalyst. The heater includes a honeycomb body that includes a honey-comb structure. The honeycomb structure includes a central axis extending longitudinally and a plurality of interconnected walls. The interconnected walls include a plurality of radial walls extending along a radius of the honeycomb body between the central axis and an outermost periphery of the honeycomb body and a plurality of angular walls arranged concentrically with respect to the central axis and spanning between the radial walls. The honeycomb structure includes a plurality of cells defined by the interconnected walls. The heater comprises a first electrode disposed at the central axis and a second electrode disposed radially outwardly of the central axis and in electrical communication with the first electrode via one or more of the intersecting walls that are located between the first electrode and second electrode.

    SERPENTINE HEATERS HAVING FEATURES TO REDUCE HOT SPOTS AT SLOT ENDS

    公开(公告)号:US20240209761A1

    公开(公告)日:2024-06-27

    申请号:US18287199

    申请日:2022-04-26

    CPC classification number: F01N3/2026 F01N3/2803 F01N2240/16

    Abstract: A heater body including an outer periphery. A plurality of slots extend from the outer periphery and terminate within the heater body. A plurality of core segments are defined between pairs of adjacent slots. A plurality of bend regions are arranged around respective terminal ends of the slots. Each pair of adjacent core segments is connected by a corresponding one of the bend regions. An auxiliary conductive feature is located within each of the bend regions. The plurality of slots electrically disconnect each pair of adjacent core segments from each other to create a serpentine current-carrying path that extends across the heater body through the electrically conductive material of the core segments and the bend regions. Each of the auxiliary conductive features locally reduces an electrical resistance of the heater body in the bend regions in comparison to the electrically conductive material alone.

    ELECTRICAL HEATERS HAVING SERPENTINE DESIGNS AND SELECTED DEAD ZONES FOR EXHAUST AFTERTREATMENT SYSTEMS AND ASSEMBLIES

    公开(公告)号:US20240200479A1

    公开(公告)日:2024-06-20

    申请号:US18287089

    申请日:2022-04-26

    CPC classification number: F01N3/2013 F01N3/2828 F01N2240/16

    Abstract: An electrical heater, an exhaust treatment assembly, and method of manufacture. The heater includes a resistive portion configured to generate heat when electrical current is passed therethrough. A plurality of slots extend into the resistive portion from an outer periphery of the resistive portion and define a serpentine current-carrying path extending through the resistive portion between a pair of electrode attachment portions. Each of the electrode attachment portions is connected to a respective end segment that is bounded between an outer periphery of the resistive portion and a respective first slot of the plurality of slots. At least one auxiliary slot in each of the end segments that extends from the outer periphery toward the first slot in a direction transverse to the first slot to bias current flow through a concentrated region adjacent to and extending along the first slot in each end segment.

    SYSTEMS AND METHODS FOR HEATING A HONEYCOMB BODY

    公开(公告)号:US20220389850A1

    公开(公告)日:2022-12-08

    申请号:US17770159

    申请日:2020-10-26

    Abstract: An electrical heater and method for heating a catalyst. The electrical heater includes a honeycomb body having a central axis extending longitudinally therethrough. The honeycomb body includes a matrix of intersecting walls forming a plurality of cells extending axially through the honeycomb body. A plurality of electrodes are positioned about an outer periphery of the honeycomb body. The plurality of electrodes are arranged into a plurality of pairs of electrodes that comprises at least a first pair of electrodes and a second pair of electrodes. Each pair of electrodes includes a first electrode and a second electrode. An electrode length of the electrodes along the outer periphery is proportional to a central current path length between center points of the electrodes of that pair of electrode. The electrode lengths of the electrodes of the first and second pairs of electrode are different.

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