Method for controlling an oxygen concentration sensor

Patent · Tue Jan 19 04:00:00 EST 1988

OSTI ID:5400863

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

This patent describes a method for controlling an oxygen concentration sensor mounted on an internal combustion engine having an exhaust gas passage, which sensor includes: a pair of oxygen ion conductive solid electrolyte members with electrodes and disposed in the exhaust gas passage; one of the oxygen ion conductive solid electrolyte members being operative as an oxygen pump element, and the other of the oxygen ion conductive solid electrolyte members being operative as a sensor cell element for measuring an oxygen concentration ratio; a pump current source for supplying a pump current to be supplied across the electrodes of the oxygen pump element; and a heater element arranged to heat the oxygen ion conductive solid electrolyte members when a heater current is supplied thereto. The method comprises: a detection step for detecting a temperature of the engine immediately before a start of a supply of the heater current; and a control step for controlling a supply of the pump current so that the supply of the pump current is started when an elapse of more than a time period determined correspondingly to the temperature of the engine from a time of the supply of the heater current, is detected.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4719895
• OSTI ID: 5400863
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL
DETECTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
ELECTROLYTES
ENGINES
ENRICHMENT
EXHAUST GASES
FLUIDS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
IONIC CONDUCTIVITY
MONITORING
OXYGEN ENRICHMENT
PHYSICAL PROPERTIES
PUMPS
WASTES