Head of a Glow Plug Provided with a Pressure Sensor

• US 20070227486A1
• Filed: 04/19/2005
• Published: 10/04/2007
• Est. Priority Date: 04/27/2004
• Status: Active Grant

• Current Assignee: Federal-Mogul Ignition Company (Apollo Global Management, Inc.), Continental Automotive France (Continental AG)
• Original Assignee: Continental Automotive France (Continental AG)
• Inventors: Ramond, Alain, Last, Bernd, Burrows, John, Goretti, Sandro, Patri, Cyrille, Boucard, Michel
• Granted Patent: US 7,775,187 B2
• Time in Patent Office: Days
• US Class Current: 123/145.A
• CPC Class Codes: F02P 19/028 the glow plug being combined with or used as a sensor
• CPC Class Codes: F23Q 2007/002 with sensing means
• CPC Class Codes: F23Q 7/001 Glowing plugs for internal-combustion engines

Abstract

The invention concerns a glow plug comprising a glow plug body (2), a pressure sensor arranged inside the glow plug body (2), a threaded portion (6) on the outside of the glow plug body (2) and gripping means (12), generally of cylindrical form with a hexagonal section, enabling the body (2) to be gripped and screwed into a corresponding tapping, the gripping means (12) being made from synthetic material.

Claims

1-8. -8. (canceled)

9. A glow plug comprising a glow plug body (2), a pressure sensor (10) arranged inside the glow plug body (2), a threaded portion (6) on the outside of the glow plug body (2) and gripping means (12), generally of cylindrical form with a hexagonal section, enabling the body (2) to be gripped and screwed into a corresponding tapping,

characterized in that the gripping means (12) are produced from synthetic material.

10. A glow plug according to claim 9, characterized in that the gripping means (12) are overmolded onto the pressure sensor (10) and onto the glow plug body.

11. A glow plug according to claim 9, characterized in that it further comprises a heating electrode, connecting means for the electrical energy supply to the heating electrode and for transmitting the signal output by the pressure sensor (10), and in that these connecting means are overmolded onto the body (2) of the glow plug.

12. A glow plug according to claim 11, characterized in that the connecting means form a male connector (14) forming a single part with the gripping means (12).

13. A glow plug according to claim 11, characterized in that the connecting means are connected to electrical wires, and in that said electrical wires project from the overmolded portion (16) of the glow plug body (2).

14. A glow plug according to claim 9, characterized in that the glow plug body (2) has, adjacent the gripping means (12), striations (32) over at least a portion of its periphery.

15. A glow plug according to claim 14, characterized in that the body (2) is a tubular body, and in that the striations (32) are longitudinally oriented.

16. An internal combustion engine, in particular of the Diesel engine type, characterized in that it comprises at least one glow plug according to claim 9.