Air/fuel ratio control system for an internal combustion engine

Patent · Tue Feb 09 04:00:00 EST 1988

OSTI ID:5331623

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

An air/fuel ratio control system for an internal combustion engine having an exhaust gas passage is described comprising: an oxygen concentration sensor which includes, a sensing part forming a gas retaining space which communicates with an inside of the exhaust gas passage through a gas diffusion restriction region, and which includes a wall of oxygen ion conductive solid electrolyte member with two pairs of electrodes, each pair of which is disposed on opposing sides of the wall of oxygen ion conductive solid electrolyte member, and sensor output signal generating part for supplying a current, in response to a voltage developing across the electrodes of one pair of the two pairs of electrodes, across the electrodes of the other pair of the two pairs of electrodes, and outputting a value of the current as the sensor output signal; a correction value setting means for setting a correction value corresponding to the sensor output signal obtained when a fuel cut operation of the engine for stopping the supply of fuel to the engine has continued for more than a predetermined time period; a correction means for correcting the sensor output signal in accordance with the correction value during an operation of the engine other than the fuel cut operation, and generating an output signal; and an air/fuel ratio adjusting means for adjusting an air/fuel ratio of the mixture to be supplied to the engine in response to the output signal of the correction means.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4723521
• OSTI ID: 5331623
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL SYSTEMS
CORRECTIONS
DESIGN
ELECTRODES
ELECTROLYTES
ENGINES
ENRICHMENT
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
OXYGEN ENRICHMENT
SOLID ELECTROLYTES