System of abnormality detection for oxygen concentration sensor

Patent · Tue Feb 16 04:00:00 EST 1988

OSTI ID:5034748

Mieno, T; Nakajima, T; Okada, Y; Oono, N

A system for abnormality detection in an air/fuel ratio control apparatus of an internal combustion engine is described comprising: an oxygen concentration sensor including two pairs of electrodes disposed in mutual opposition, with each of the pairs sandwiching an oxygen ion-conductive solid electrolytic member; voltage applying means for applying a pump voltage; a heater element for heating the solid electrolytic member; gas diffusion control means for providing an exhaust gas of an internal combustion engine to the vicinity of one electrode of each of the first and second pairs of electrodes; means for deriving an air/fuel ratio compensation value in accordance with the oxygen concentration sensing value, drive means for driving an air/fuel ratio control means of the internal combustion engine in accordance with a corrected air/fuel ratio control value which is obtained by applying compensation to an air/fuel ratio control value in accordance with the air/fuel ratio compensation value; and means for detecting an abnormality of the heater element based upon a voltage developed between the first pair of electrodes and upon the air/fuel ratio compensation value.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4724815
• OSTI ID: 5034748
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL SYSTEMS
ELECTRODES
ELECTROLYTES
ELEMENTS
ENGINES
ENRICHMENT
EXHAUST GASES
FLUIDS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HEAT ENGINES
HEATERS
INTERNAL COMBUSTION ENGINES
METERING
NONMETALS
OPERATION
OXYGEN
OXYGEN ENRICHMENT
PUMPS
SOLID ELECTROLYTES
WASTES