Patent ID: 11913365
Assignee: WATLOW ELECTRIC MANUFACTURING COMPANY
Field: Environmental technology (Chemistry)
Classification: CPC F  H  Y | IPC F  H

Claim 0:
1. An exhaust gas heater system for an exhaust system of an internal combustion engine, the exhaust gas heater system comprising:
a housing comprising an outer peripheral wall disposed about a central axis and defining an interior hollow space configured to receive exhaust gas from an exhaust pipe of the exhaust system such that the exhaust gas flows through the interior hollow space;
a heating element positioned within the hollow space and including a first end and a second end, the heating element including a plurality of arcuate sections arranged along a radial direction relative to the central axis, wherein the heating element follows a path that proceeds from the first end to the second end such that the path proceeds clockwise about the central axis along a first set of the arcuate sections and counter-clockwise about the central axis along a second set of the arcuate sections; and
a support member coupled to an exterior of the heating element at a plurality of discrete locations along the path,
wherein the heating element includes an external sheath, an electrically conductive resistance element, and electrically insulating material, wherein the external sheath is formed of a thermally conductive material, wherein the resistance element extends longitudinally within the external sheath, wherein the electrically insulating material is disposed about the resistance element between the resistance element and the sheath.