Exhaust gas heating device, having a metal foam heating element
AssigneeFaurecia Systemes D'Echappement
InventorsTing FENG, Yannick FOURCAUDOT
Life of this patent
Estimating the term…
Abstract
A heating device includes a heating element in the form of a metal foam, and a case defined by a side wall that extends along a longitudinal axis. The metal foam is housed in the case. An electrical thermal insulator is arranged between the metal foam and the case. The heating device includes at least one electrode and the metal foam includes a zone configured to receive the at least one electrode.
Claims10
An exhaust gas heating device for a heat engine exhaust line, comprising:
- a metal foam forming a heating element;
- a case, defined by a side wall extending along a longitudinal axis, in which the metal foam is housed;
- an electrical thermal insulator arranged between the metal foam and the case;
- at least one electrode;
- and
- wherein the metal foam includes a zone configured to receive the at least one electrode.
A method for manufacturing an exhaust gas heating device, the exhaust gas heating device comprising a metal foam manufactured according to the following steps:
- manufacturing a foam preform;
- filling the foam preform with a first liquid metal having a first density;
- drying the foam preform filled with the first liquid metal;
- first sintering of the foam preform filled with the first liquid metal;
- after the first sintering, injecting a second liquid metal having a second density higher than the first density into at least one zone of a periphery of the foam preform filled with the first liquid metal;
- and
- second sintering of the foam preform comprising the at least one zone.
Dependencies are inferred from the claim text.