US 12,286,916 B2
Systems and methods for heating a honeycomb body
David Robert Heine, Hammondsport, NY (US); and Avinash Tukaram Shinde, Pune (IN)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/770,159
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Oct. 26, 2020, PCT No. PCT/US2020/057277
§ 371(c)(1), (2) Date Apr. 19, 2022,
PCT Pub. No. WO2021/086765, PCT Pub. Date May 6, 2021.
Claims priority of provisional application 62/927,460, filed on Oct. 29, 2019.
Prior Publication US 2022/0389850 A1, Dec. 8, 2022
Int. Cl. F01N 3/027 (2006.01); F01N 3/20 (2006.01); F01N 9/00 (2006.01)
CPC F01N 3/027 (2013.01) [F01N 3/2026 (2013.01); F01N 9/00 (2013.01); F01N 2240/16 (2013.01); F01N 2900/1602 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electrical heater, comprising:
a honeycomb body having a central axis extending longitudinally therethrough, the honeycomb body comprising a matrix of intersecting walls forming a plurality of cells extending axially through the honeycomb body;
a plurality of electrodes positioned about an outer periphery of the honeycomb body, the plurality of electrodes being 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 comprising a first electrode and a second electrode, wherein a current produced by the electrodes of each pair flows through at least some of the intersecting walls between the electrodes of each pair of electrodes;
wherein an electrode length of the electrodes of each pair of electrodes, measured along the outer periphery in a cross-sectional plane perpendicular to the central axis, is proportional to a central current path length defined as the shortest distance, through the walls, between center points of the electrodes of that pair of electrodes, and wherein the electrode length of the electrodes of the first pair of electrodes is different than the electrode length of the electrodes of the second pair of electrodes.