Glow plug arrangement

US4211204A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jens Glauner · Tamm, DE
• Gunther Kauhl · Marbach am Neckar, DE
• Hannes Pflug · Gerlingen, DE
• Leo Steinke · Waiblingen, DE
• Helmut Weyl

Key dates

• Filing date: Sep 13, 1978
• Grant date: Jul 8, 1980
• Expiry date: Sep 13, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23Q7/001
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

To heat the glow plug for an internal combustion engine, a spiral band or ribbon is wound in an essentially co-planar spiral about a central bolt secured to the bottom of the glow plug, the outer terminal of the spiral being connected to a lead-in with highly positive temperature coefficient of resistance to provide for self-limiting current flow upon heating of the glow plug. All free spaces in the glow plug are filled with a highly heat-conductive insulating material, for example magnesium oxide.