Global Patent Index - EP 0989370 A2

EP 0989370 A2 20000329 - Glow sensor-metal tip

Title (en)

Glow sensor-metal tip

Title (de)

Metallspitze für Glühsensor

Title (fr)

Métal pour extrémité de capteur d'incandescence


EP 0989370 A2 20000329 (EN)


EP 99203034 A 19990917


US 16039898 A 19980925

Abstract (en)

A glow sensor (10, 60, 100, 130, 140, 154) provides functions of both a diesel engine glow plug and an ion sensor for sensing engine combustion initiation and characteristics. The sensor includes a tubular metal sheath (14, 64) supported by various embodiments of electrical insulating and retaining means in a metal shell (12, 62) mountable in an engine cylinder head. The metal sheath (14, 64) includes a heating element (24) in a glow tip (22) at an inner end of the sheath (14, 64) which, in use, extends into an engine combustion chamber or pre-chamber and is connected by a conductor with a source of electric voltage. In use, the voltage produces a current carried by electrons generated by ionization of the combustion chamber gases during combustion. The current varies with the degree of ionization and the amount of electrons generated during various phases of the combustion event. The resulting information is usable in controlling engine operation or evaluating its operation for test purposes. Various construction features of disclosed embodiments include isolated or non-isolated heating coils for electric heaters (24) within the glow tip (22) with various arrangements for internally connecting and grounding the electrical elements in the glow sensor (10, 60, 100, 130, 140, 154). <IMAGE>

IPC 1-7

F23Q 7/00

IPC 8 full level

F23Q 7/00 (2006.01)

CPC (source: EP)

F23Q 7/001 (2013.01)

Designated contracting state (EPC)


DOCDB simple family (publication)

EP 0989370 A2 20000329; EP 0989370 A3 20050420

DOCDB simple family (application)

EP 99203034 A 19990917