Control device for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakanori Sasaki
Life of this patent
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Abstract
In a control device for an internal combustion engine including an air-fuel ratio sensor that includes a catalyst layer that covers an exhaust gas-side electrode, an oxygen storage capacity of the catalyst layer is acquired based on a sensor output of the air-fuel ratio sensor. The sensor output is corrected if the oxygen storage capacity is higher than a predetermined value and the sensor output is in a predetermined range in the vicinity of the theoretical air-fuel ratio. Preferably, the oxygen storage capacity is calculated by integrating the product of a deviation amount ΔA/F of the sensor output with respect to the theoretical air-fuel ratio and a dwell time thereof. A correction period in which a correction operation is performed is set based on the oxygen storage capacity.
Claims6
A control device for an internal combustion engine, comprising:
- an exhaust gas sensor configured to be arranged in an exhaust passage of an internal combustion engine, and includes a sensor element comprising a solid electrolyte in which an atmosphere-side electrode is formed on one side surface and an exhaust gas-side electrode is formed on another side surface, and a catalyst layer that covers the exhaust gas-side electrode;
- and
- an electronic control unit having control logic, which when executed:
- acquires an oxygen storage capacity that represents a capacity of the catalyst layer to store or release oxygen based on a sensor output of the exhaust gas sensor;
- and
- executes a correction operation that corrects the sensor output when the oxygen storage capacity is higher than a predetermined value and the sensor output is in a predetermined range in a vicinity of a theoretical air-fuel ratio.
Dependencies are inferred from the claim text.