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Composite conductor, in particular for heater plugs of a diesel engine

By using axial tilt welding technology and active solder between ceramic conductors and metal conductors, the problem of connecting ceramic coaxial conductors and metal feed lines is solved, stable welding effects at high temperatures are achieved, and the production process is simplified.

Inactive Publication Date: 2008-09-17
BERU AG DE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The way known from DE 40 28 859 A1 for connecting ceramic conductors to metal feeders cannot be applied to such ceramic conductors with coaxial design as known from DE 103 53 972 A1

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] figure 1 with figure 2 Shown is a composite conductor with a ceramic coaxial conductor 1 consisting of a ceramic inner conductor 11 , a ceramic outer conductor 13 and a ceramic insulator 12 arranged therebetween. The ceramic outer conductor 13 is connected to the metal conductor 2 as a feeder. The ceramic inner conductor 11 is connected to the coaxial inner conductor 3 as a feeder line.

[0055] The ceramic coaxial conductor 1 tapers conically towards its end point. This has the effect of providing the ceramic inner conductor 11 with a frustum-shaped side 10, the ceramic outer conductor 13 with a frustum-shaped side 14, and the insulator 12 with a frustum-shaped side 16, the surfaces being free from each other. transition seamlessly. The metallic inner conductor 3 comprises a matching recess 7 with a frustum-shaped inner surface 8 followed by a short cylindrical blind hole 9 . The metallic outer conductor 2 has a matching frustum-shaped inner surface 15 followed b...

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PUM

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Abstract

The invention relates to a composite electric conductor comprising metal conductor and ceramic conductor or non-conductor, at least one of which is oblong and which are assembled with each other in an electrically conductive manner. The invention is characterised in that the ceramic conductor (11) or non-conductor and the metal conductor (3) are hard-soldered to each other by on a contact surface extending in a longitudinal direction (37) of at least one oblong conductor (3, 11).

Description

technical field [0001] The invention relates to a composite electrical conductor, in particular for diesel engine glow plugs. Background technique [0002] A composite electrical conductor for a glow plug of a diesel engine having the features of the preamble of claim 1 is known from DE 103 53 972 A1. The composite electrical conductor includes an elongated ceramic inner conductor, an elongated ceramic outer conductor surrounding the ceramic inner conductor, and an insulator, also ceramic, disposed between the ceramic inner conductor and the ceramic outer conductor. The inner conductor, outer conductor and insulator are arranged coaxially with respect to each other. Composite conductors are produced by a powder metallurgy process of coextrusion followed by sintering. It is then further processed to form ceramic heating bundles for diesel engine glow plugs. For this purpose, the conductor is cut into sections of predetermined length, one end of which, that is to say, the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q7/00
CPCY10T29/49117F23Q7/001H01B1/02H01B13/08
Owner BERU AG DE