Patent · US Expired

Spark plug with a measurement device

US4958515A · kind A · utility

5Cited by

7References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gerhard Bruggen · Stuttgart, DE
Winfried Keiper · Ditzingen, DE
Leo Steinke · Waiblingen, DE

Key dates

Filing date	Jan 25, 1989
Grant date	Sep 25, 1990
Priority date	—
Expiry date	Jan 25, 2009

Classification

Technology area (CPC H)Electricity
CPC primaryH01T13/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A spark plug for use in an internal combustion engine and comprising a movement sensor located in the region of the upsetting and heat-shrink area of the spark plug housing for sensing movement resulting from movement of movable parts of the engine such as pistons, valves, etc.

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