| 摘要 |
<p>There is provided an improved core element (16) for use in converters, especially catalytic converters. The core is characterized by two portions one of which portions is capable of being electrically heated, and the other of which is isolated from the first portion electrically and thermally and is called a light-off portion. A plurality of core elements (16) is wrapped about a central rigid metallic pin (30) and the assembly tightly spirally wound about the pin (30) to form the core, part of which is electrically heatable and the other of which is not heated electrically. The core is formed from a plurality of composite core elements (16), each including a corrugated strip (12) backed up with a flat two-member strip (14), one band (48) of the two-member flat strip (14) being of generally relatively narrow width, contiguous with the leading portion of the corrugated strip (12), and the other band (54) contiguous with the trailing portion of the corrugated strip (12) and usually being of relatively greater width. The narrow flat band (48) is electrically heatable, and the two flat bands (48,54) lie in essentially the same plane (when unrolled, or developed) and are spaced one from the other so as to be out of electrical contact. The invention also contemplates a catalytic converter formed of the core elements (16) hereof, and a method of accelerating the catalytic response of a catalytic converter. <IMAGE></p> |
