Title:
【発明の名称】ラムダ値検出方法
Document Type and Number:
Japanese Patent JP2792877
Kind Code:
B2
Abstract:
PCT No. PCT/DE88/00504 Sec. 371 Date Feb. 20, 1990 Sec. 102(e) Date Feb. 20, 1990 PCT Filed Aug. 18, 1988 PCT Pub. No. WO89/01623 PCT Pub. Date Feb. 23, 1989.In a method for lambda value detection, the voltages of the loaded and the unloaded lambda sensor are detected and the internal resistance of the sensor is calculated from these values with the aid of the known value of the load resistance. The value of the internal resistance and the respective value of the voltage of the sensor in the unloaded state serve as input variables for a characteristic field, in which lambda values dependent on values of the internal resistance and of the voltage of the sensor in the unloaded state are stored. The method of the invention affords the advantage that lambda values can be measured very accurately even in the strongly temperature-dependent rich branch of a sensor, for example, of a sensor of the Nernst type. The values thus detected can be indicated by a measuring device or they can be used for exhaust gas control, for example in warming-up or at full load.
Inventors:
RAFU ROTAARU
SHUNAIBERU EEBERUHARUTO
UESUTAADORUFU MIHYAERU
SHUNAIBERU EEBERUHARUTO
UESUTAADORUFU MIHYAERU
Application Number:
JP50677388A
Publication Date:
September 03, 1998
Filing Date:
August 18, 1988
Export Citation:
Assignee:
ROOBERUTO BOTSUSHU GMBH
International Classes:
G01N27/409; F02D41/00; F02D41/14; G01N27/406; G01N27/416; (IPC1-7): G01N27/409
Domestic Patent References:
| JP5810644A | ||||
| JP6039549A |
Attorney, Agent or Firm:
Toshio Yano (2 outside)