| (19) |
 |
|
(11) |
EP 1 164 285 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
17.07.2002 Bulletin 2002/29 |
| (43) |
Date of publication A2: |
|
19.12.2001 Bulletin 2001/51 |
| (22) |
Date of filing: 11.11.2000 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
24.12.1999 LU 90494
|
| (71) |
Applicant: Delphi Technologies, Inc. |
|
Troy, MI 48007 (US) |
|
| (72) |
Inventor: |
|
- Engel, Jos
4671 Oberkorn (LU)
|
| (74) |
Representative: Beissel, Jean et al |
|
Office Ernest T. Freylinger S.A. 234, route d'Arlon B.P. 48
8001 Strassen
8001 Strassen (LU) |
|
| |
|
| (54) |
Glow plug arrangement and method for operating said arrangement |
(57) Glow plug arrangement comprising a glow plug (10) including heater means (18) and
ion sensing means (20); a first voltage source (22) for generating a heater supply
voltage to be applied to said heater means (18) during a heating function of said
glow plug (10); and a second voltage source (24) for generating an ion sensor supply
voltage to be applied to said ion sensing means (20) during an ion sensing function
of said glow plug (10). The glow plug arrangement is characterised in that said ion
sensor supply voltage has a different polarity than said heater supply voltage.