Patent · US Active

Spark plug resistance element comprising fine non-conductive particles

US10879676B2 · kind B2 · utility

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15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Benedikt Reinsch · Riederich, DE
Stefan Nufer · Stuttgart, DE
Hubertus Braun · Renningen, DE
Carsten Kuenzel · Tamm, DE

Key dates

Filing date	Sep 19, 2018
Grant date	Dec 29, 2020
Priority date	—
Expiry date	Sep 19, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH01T13/20
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A spark plug includes a housing, an isolator arranged in the housing, and a ground electrode arranged on a front surface of the housing on a combustion chamber side. The spark plug further includes a central electrode, a terminal stud, and a resistance element all of which are arranged in the isolator. The resistance element is spatially arranged between the central electrode and the terminal stud and connects the central electrode to the terminal stud. The ground electrode forms a spark gap together with the central electrode. The resistance element contains a resistance material that contains conductive particles and non-conductive particles. At least 80% of the non-conductive particles have a maximum diameter of 20 μm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.