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1. WO1990006431 - PROCESS AND DEVICE FOR DETECTING AN ERROR STATUS IN A LAMBDA PROBE

Publication Number WO/1990/006431
Publication Date 14.06.1990
International Application No. PCT/DE1989/000727
International Filing Date 21.11.1989
IPC
F02D 41/14 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
G01N 27/406 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
403Cells and electrode assemblies
406Cells and probes with solid electrolytes
G01N 27/417 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
416Systems
417using cells and probes with solid electrolytes
CPC
F02D 41/14
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
F02D 41/1494
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
1438using means for determining characteristics of the combustion gases; Sensors therefor
1493Details
1494Control of sensor heater
F02D 41/1495
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
1438using means for determining characteristics of the combustion gases; Sensors therefor
1493Details
1495Detection of abnormalities in the air/fuel ratio feedback system
G01N 27/4065
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
403Cells and electrode assemblies
406Cells and probes with solid electrolytes
4065Circuit arrangements specially adapted therefor
G01N 27/4175
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
416Systems
417using cells ; , i.e. more than one cell; and probes with solid electrolytes
4175Calibrating or checking the analyser
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE] (AllExceptUS)
  • DENZ, Helmut [DE]/[DE] (UsOnly)
Inventors
  • DENZ, Helmut
Priority Data
P 38 40 148.729.11.1988DE
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN UND VORRICHTUNG ZUM ERKENNEN EINES FEHLERZUSTANDES EINER LAMBDASONDE
(EN) PROCESS AND DEVICE FOR DETECTING AN ERROR STATUS IN A LAMBDA PROBE
(FR) PROCEDE ET DISPOSITIF PERMETTANT DE DETECTER LA DEFECTUOSITE D'UNE SONDE LAMBDA
Abstract
(DE) Bei einer beheizbaren Lambdasonde wird zunächst die Sondenspannung bei ausgeschalteter Heizung und dann bei eingeschalteter Heizung gemessen. Die Differenz zwischen beiden Spannungen wird gebildet und dann, wenn diese eine vorgegebene Schwelldifferenz übersteigt, wird ein Nebenschlußsignal ausgegeben, das anzeigt, daß die Sonde noch nicht betriebsbereit ist. Andernfalls wird wie herkömmlich auf Regelbereitschaft untersucht.
(EN) In a heatable lambda probe the probe voltage is first measured with the heating system switched off and subsequently with it switched on. The difference between the two voltages is found and, if it exceeds a certain threshold, a shunt signal is issued to indicate that the probe is not yet operational. Otherwise, an examination for readiness is performed in the usual manner.
(FR) Dans une sonde lambda capable d'être chauffée, la tension de la sonde est mesurée tout d'abord lorsque le chauffage est coupé, puis lorsque le chauffage est en marche. Cela permet d'obtenir une différence entre les deux tensions; lorsque cette différence dépasse une valeur seuil prédéterminée, un signal en dérivation est émis, indiquant que la sonde n'est pas encore prête à être mise en service. Sinon, on examine de la manière habituelle l'aptitude à la régulation.
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