COVERING DEVICE FOR A SPARK PLUG SHAFT AND OPTICAL FIBER DEVICE FOR A LASER SPARK PLUG

• US 20130298864A1
• Filed: 09/13/2011
• Published: 11/14/2013
• Est. Priority Date: 11/15/2010
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Nuebel, Karl-Heinz, Vogel, Manfred, Barth, Frank, Weinrotter, Martin
• Application Number:
  US13/885,297
• Publication Number:
  US 20130298864A1
• Time in Patent Office: Days
• US Class Current: 123/143.C
• CPC Class Codes: F02F 1/242 Arrangement of spark plugs or injectors
• CPC Class Codes: F02P 23/04 Other physical ignition means, e.g. using laser rays
• CPC Class Codes: H01T 13/06 Covers forming a part of the plug and protecting it against adverse environment

Abstract

A covering device for a spark plug shaft of an internal combustion engine has a fastening element provided for mechanically fastening the covering device to a target system, the fastening element being configured to electrically conductively connect at least one electric conductor to the covering device (100) and/or the target system.

Claims

1-15. -15. (canceled)

16. A covering device for a spark plug shaft of an internal combustion engine, comprising:

a covering element; and

a fastening unit configured to mechanically fasten the covering element to a target system, wherein the fastening unit is further configured to electrically conductively connect at least one electric conductor to at least one of the covering element and the target system.

17. The covering device as recited in claim 16, wherein the fastening unit is configured to connect the at least one electric conductor to at least one of the covering element and the target system with the aid of one of a screw connection or a clamping connection.

18. The covering device as recited in claim 17, wherein the fastening unit has a mechanical coding which cooperates with a corresponding mechanical coding of a contact element of the electric conductor in such a way that an electrically conductive connection is established between the contact element of the electric conductor and the at least one of the covering element and the target system only in the case of a proper mechanical fastening of the contact element to the fastening unit.

19. The covering device as recited in claim 18, wherein the fastening unit has, as the mechanical coding, an elevated eye which protrudes from a base area of the covering element.

20. The covering device as recited in claim 18, wherein the fastening unit has a stud bolt and a nut cooperating with the stud bolt.

21. The covering device as recited in claim 18, wherein the covering element is impermeable to optical radiation of at least one predefined wavelength range.

22. The covering device as recited in claim 18, wherein the covering element is made at least partially of at least one of plastic, metal, and a magnetically conductive material.

23. The covering device as recited in claim 18, further comprising:

at least one identifier configured as a radio frequency identification transponder to wirelessly transmit an identification signal to an evaluation unit which applies a query signal to the identifier.

24. An optical fiber device for a laser spark plug, comprising:

at least one optical fiber element for transmitting optical power to the laser spark plug; and

at least one electric signal conductor for transmitting electrical signals.

25. The optical fiber device as recited in claim 24, wherein an end section of the signal conductor has a contact element configured as a ring cable lug for electrically contacting an object.

26. The optical fiber device as recited in claim 25, wherein the contact element has a mechanical coding which cooperates with a corresponding mechanical coding provided on the object.

27. The optical fiber device as recited in claim 26, wherein the signal conductor is at least sectionally wound around a carrier layer of the optical fiber element.

28. The optical fiber device as recited in claim 27, wherein the signal conductor is formed at least sectionally by resistance paths which (i) are printed on the carrier layer of the optical fiber element and (ii) essentially extend in the longitudinal direction of the optical fiber element.

29. The optical fiber device as recited in claim 27,

wherein the signal conductor is knitted at least partially in a net-like manner to form a conductive hose.

30. An ignition system for an internal combustion engine, comprising:

a laser spark plug including a pumping module for supplying the laser spark plug with pumped radiation;

an optical fiber device for transmitting the pumped radiation from the pumping module to the laser spark plug,

wherein the optical fiber device includes at least one optical fiber element for transmitting optical power to the laser spark plug and at least one electric signal conductor for transmitting electrical signals; and

an evaluation unit configured to;

(i) apply a check signal to the at least one signal conductor of the optical fiber device;

(ii) evaluate a response signal resulting from the check signal; and

(iii) determine an operating state of the signal conductor from the response signal.