Patent ID: 11946406
Assignee: VITESCO TECHNOLOGIES GMBH
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 0:
1. An electric heating device for an exhaust gas catalyst, the electric heating device comprising:
a sleeve; and
a heating cellular structure which is heated by a flow of electric current and which is contained in the sleeve,
the electric heating device being designed to be positioned in a segment of an exhaust gas pipe upstream of the exhaust gas catalyst, so as to completely occupy a cross section of said segment such that exhaust gases flowing in the exhaust gas pipe pass through a heating cellular structure before reaching the exhaust gas catalyst,
the heating cellular structure is designed to dissipate an inhomogeneous thermal power in a section perpendicular to a direction of flow of the exhaust gases, such that a temperature of the exhaust gases at an outlet of the heating cellular structure is homogeneous in the section perpendicular to the direction of flow of the exhaust gases,
wherein the heating cellular structure is obtained by winding a heating cellular panel about an axis corresponding to the direction of flow of the exhaust gases when the electric heating device is positioned in the exhaust pipe, and wherein the cellular panel has, along the axis, a variable dimension, and wherein the heating cellular panel has at least one first portion designed to form, once the heating cellular panel has been wound, a peripheral portion of the heating cellular structure, and at least one second portion designed to form, once the heating cellular panel has been wound, a central portion of the heating cellular structure, and said at least one first portion has a smaller dimension, in a direction of the axis of winding, than the dimension of the at least one second portion.