Global Patent Index - EP 1397674 A1

EP 1397674 A1 20040317 - METHOD FOR OPERATING A SENSOR ELEMENT

Title (en)

METHOD FOR OPERATING A SENSOR ELEMENT

Title (de)

VERFAHREN ZUM BETREIBEN EINES SENSORELEMENTS

Title (fr)

PROCEDE D'UTILISATION D'UN ELEMENT CAPTEUR

Publication

EP 1397674 A1 20040317 (DE)

Application

EP 02737827 A 20020502

Priority

  • DE 0201584 W 20020502
  • DE 10121771 A 20010504

Abstract (en)

[origin: WO02090967A1] Disclosed is a method for operating a sensor element (10) for determining at least one gaseous component of a gas, especially an exhaust gas of an internal combustion engine. A measuring gas chamber (35) is incorporated into the sensor element (10), said measuring chamber being in contact with a gas which is disposed outside the senior element (10). A first electrode (31) and a second electrode (32) are provided in the measuring gas chamber (35) on a solid electrolyte (21) which conducts oxygen ions, and a third electrode (33) is provided outside the measuring gas chamber. The second electrode (32) is electrically connected to the third electrode (33) by the solid electrolyte (21), whereby oxygen can be pumped when a voltage is applied between the second electrode (32) and the third electrode (33). A lower voltage exists during a first time interval between the second and third electrode (32, 33) than that outside said time interval. When external conditions are constant, the partial pressure of the oxygen in the measuring gas chamber during the first time interval is greater, at least on average during said periods of time, than during a second time interval.

IPC 1-7

G01N 27/407; G01N 27/416

IPC 8 full level

G01N 27/41 (2006.01); G01N 27/416 (2006.01); G01N 27/419 (2006.01); G01N 33/00 (2006.01); F02D 41/14 (2006.01)

CPC (source: EP)

G01N 27/419 (2013.01); F02D 41/146 (2013.01); F02D 41/1476 (2013.01)

Citation (search report)

See references of WO 02090967A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

WO 02090967 A1 20021114; DE 10121771 A1 20021128; DE 10121771 C2 20030626; EP 1397674 A1 20040317; JP 2004519694 A 20040702; US 2003164023 A1 20030904

DOCDB simple family (application)

DE 0201584 W 20020502; DE 10121771 A 20010504; EP 02737827 A 20020502; JP 2002588178 A 20020502; US 31194503 A 20030327