Core for an electrically heatable catalytic converter
First Claim
Patent Images
1. A core of an electrically heatable catalytic converter comprising:
- (a) a central structural member;
(b) a segmented outer shell, each of said segments being electrically isolated from any other segment except through a plurality of thin high temperature resistive metal alloy heater strips;
said plurality of heater strips forming a monolith, each of said heater strips being securred at its proximal end to said central structural member and at its distal end to an outer shell segment, the heater strips attached to a common shell segment being connected in parallel and defining a subcircuit, and the shell segments being connected in series through the central structural member and the heater strips.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided an improved core for an electrically heatable catalytic converter, and an electrically heatable catalytic converter containing such core, said core characterized by having a plurality of subcircuits in which the heater strips of thin high temperature resistive metal alloy are in parallel and connected between an outer shell segment and a central structural member, and the plurality of such subcircuits is connected in series, whereby the resistance between the terminals of the electrically heatable catalytic converter is effectively raised.
-
Citations
22 Claims
-
1. A core of an electrically heatable catalytic converter comprising:
- (a) a central structural member;
(b) a segmented outer shell, each of said segments being electrically isolated from any other segment except through a plurality of thin high temperature resistive metal alloy heater strips;
said plurality of heater strips forming a monolith, each of said heater strips being securred at its proximal end to said central structural member and at its distal end to an outer shell segment, the heater strips attached to a common shell segment being connected in parallel and defining a subcircuit, and the shell segments being connected in series through the central structural member and the heater strips. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22)
- (a) a central structural member;
- 20. An electrically heatable catalytic converter comprising (1) a housing, (2) end cap adapters for each end of the housing for adapting said converter for insertion an exhaust line, (3) a core including (a) a central structural member, (b) a segmented outer shell having a plurality of segments, each of said segments being electrically isolated from any other segment except as connected through a plurality of thin high temperature resistive metal alloy heater strips and the central structural member, (c) said plurality of said alloy heater strips tightly spirally wound and forming a monolith, each of said heater strips electrically secured at its proximal end to said central structural member and at its distal end to an outer shell segment, the heater strips connected to a given shell segment being connected in parallel and defining a subcircuit, and the shell segments being connected in series through said central structural member and said heater strips, (d) a diametrally extending bar, said bar being electrically insulated from said central structural member and in juxtaposition with the downstream side of the aforesaid monolith, the outer ends of said bar being welded to the housing, (4) insulation means between the housing and the core, (5) a feed through terminal extending through said housing, secured to one of said shell segments, and adapted to be attached to one pole of a voltage source, (6) a second terminal for attachment to the other pole of a voltage source and attached to a another shell segment where there are an even number of subcircuits and to the central structural member where there are an odd number subcircuits, and (7) a voltage source.
Specification