Patent · US Expired

Spark plug and optical combustion sensor combination

US4506186A · kind A · utility

2Cited by

2References

19Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Eckart Damson · Stuttgart, DE
Winfried Moser · Ludwigsburg, DE
Klaus Muller · Tamm, DE
Franz Rieger · Aalen, DE
Rainer Schubler · Bietigheim, DE

Key dates

Filing date	Sep 29, 1982
Grant date	Mar 19, 1985
Priority date	—
Expiry date	Sep 29, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG01L23/22
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

To facilitate assembly of a central glass rod in an optical sensor-spark plug combination, electrical energy is conducted to the spark end of the combination by a high temperature resistant tube or sleeve 11 surrounding a central glass rod 2 for only a limited portion of the entire length; electrical energy is conducted to the high temperature resistant sleeve 11, which forms the sparking end of the spark plug, from a terminal connector 1 by a packing 10 of electrically conductive powder, which may include radio noise suppression resistance characteristics, held in place by a compression spring 8, in electrical connection with the terminal connector 1; or by a separate tube 12 surrounding the glass rod 1, and of non-heat resistant material, the glass rod 1 being separated from the other tube 12 by an adhesive which, at the connecting end of the spark plug, need not be high temperature resistant.

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