Global patent index - EP 1019741 A1

EP 1019741 A1 2000-07-19 - METHOD AND DEVICE FOR DETERMINING THE OPERATING TEMPERATURE OF ENGINES

Title (en)

METHOD AND DEVICE FOR DETERMINING THE OPERATING TEMPERATURE OF ENGINES

Title (de)

VERFAHREN UND VORRICHTUNG ZUM ERFASSEN DER BETRIEBSTEMPERATUR VON MOTOREN

Title (fr)

PROCEDE ET DISPOSITIF DE DETERMINATION DE LA TEMPERATURE DE SERVICE DE MOTEURS

Publication

EP 1019741 A1 (DE)

Application

EP 98954208 A

Priority

  • DE 9802800 W
  • DE 19743046 A

Abstract (en)

[origin: WO9917127A1] The invention relates to a method enabling determination without sensor of the engine temperature as well as the engine start-up temperature, which involves measuring the engine current and voltage in the start-up phase. Identifying from the current and voltage signals the effective component of the engine impedance and comparing values when the engine is powered off with values for a known temperature enable the engine temperature to be determined. The determination method can be either analog or digital, a computer being needed in the second case.

IPC 1-7 (main, further and additional classification)

G01R 31/34; G01K 7/20

IPC 8 full level (invention and additional information)

G01K 7/20 (2006.01); G01R 31/34 (2006.01)

CPC (invention and additional information)

G01K 7/20 (2013.01); G01R 31/343 (2013.01)

Citation (search report)

See references of WO 9917127A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9917127 A1 19990408; DE 19743046 C1 19990429; EP 1019741 A1 20000719; US 6504358 B1 20030107

INPADOC legal status

2003-03-12 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Effective date: 20030116

2000-12-27 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20001113

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000317

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT