Sensor control device, sensor control system, and sensor control method
AssigneeNgk Spark Plug Co., Ltd.
InventorToshiya MATSUOKA
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Abstract
A sensor control apparatus includes a detection section and a computation section. The detection section detects an output signal output from a sensor element and changing in accordance with oxygen concentration. The computation section obtains, as correction information used for calculation of a correction coefficient, the output signal obtained in a period during which recirculation of exhaust gas into an intake atmosphere by an exhaust gas recirculation apparatus is stopped and an idle stop operation of an internal combustion engine is being performed.
Claims13
A sensor control apparatus which is to be connected to an oxygen sensor having a sensor element for measuring oxygen concentration of an intake atmosphere of an internal combustion engine equipped with an exhaust gas recirculation apparatus, the sensor control apparatus comprising:
- a detection section for detecting an output signal output from the sensor element and changing in accordance with the oxygen concentration;
- and
- a computation section for calculating a correction coefficient for the output signal used for calculation of the oxygen concentration,
- wherein the computation section obtains, as correction information used for calculation of the correction coefficient, the output signal in a period during which recirculation of exhaust gas into the intake atmosphere by the exhaust gas recirculation apparatus is stopped and the internal combustion engine is performing an idle stop operation.
A sensor control method for an oxygen sensor having a sensor element for measuring oxygen concentration of an intake atmosphere of an internal combustion engine equipped with an exhaust gas recirculation apparatus, the method comprising:
- a detection step of detecting an output signal output from the sensor element and changing in accordance with the oxygen concentration;
- a condition judgment step of judging whether or not a condition for an idle stop operation of the internal combustion engine is satisfied;
- a recirculation stopping step of stopping recirculation of exhaust gas into the intake atmosphere by the exhaust gas recirculation apparatus;
- an idle stop step of performing the idle stop operation of the internal combustion engine after performance of the condition judgment step and the recirculation stopping step;
- an obtainment step of obtaining, as the correction information used for calculation of the correction coefficient, the output signal obtained in a period during which the idle stop operation is performed;
- and
- a calculation step of calculating the correction coefficient on the basis of the obtained correction information.
Dependencies are inferred from the claim text.