【発明の名称】空燃比検出装置

Japanese Patent JPH0635955

B2

An air fuel ratio detecting device which is improved in accuracy as compared to similar prior art devices comprises a sensor cell for developing an electrical signal in response to the difference between the concentration of oxygen within an exhaust gas and the concentration of oxygen within a reference gas, a controlling means for developing an electrical control signal having a polarity determined from the output of the sensor cell, a pump cell for moving oxygen ions in response to the electrical control signal received from the controlling means, a control current detecting means for detecting control current flow between the controlling means and the pump cell, an air fuel ratio detecting means for detecting an air fuel ratio from the control current flow, a stoichiometric air fuel ratio detecting means for detecting the direction of the control current flow so as to determine the stoichiometric air fuel ratio, a storage means for storing therein a linear air fuel ratio value which is determined from a predetermined functional relationship with respect to the magnitude of the control current flow, a linear air fuel ratio detecting means for detecting the magnitude of the control current flow detected by the control current detecting means so as to compare the same with the stored linear air fuel ratio value derived from the storage means, and a correcting means for correcting the predetermined functional relationship stored within the storage means when a stoichiometric air fuel ratio signal is developed from the stoichiometric air fuel ratio detecting means.

HIRAKO TADASHI
DANNO YOSHIRO
SHIMADA MAKOTO

JP17921086A

May 11, 1994

July 30, 1986

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MITSUBISHI MOTORS CORP

G01N27/26; F02D41/00; F02D41/14; F02D45/00; G01D1/16; G01N27/406; G01N27/407; G01N27/409; G01N27/416; G01N27/417; G01N27/419; G05D11/02; (IPC1-7): G01N27/419

JP58198752A
JP60238755A

Kabayama Toru

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