Data processing: measuring – calibrating – or testing – Measurement system – Temperature measuring system
Reexamination Certificate
2007-04-17
2007-04-17
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Temperature measuring system
Reexamination Certificate
active
10529282
ABSTRACT:
A control device for an exhaust gas sensor is provided to judge the deterioration of a sensor element in real time and promptly complete an activity judgment in an exhaust gas sensor warm-up sequence without resort to learning. An air-fuel ratio sensor is mounted in an exhaust path of an internal combustion engine. The air-fuel ratio sensor is equipped with a sensor element that becomes active when an activity temperature is reached. If the activity of the air-fuel ratio sensor is not judged, a judgment is made whether an element impedance Z of the sensor element is not greater than an activity judgment value Zact (condition A), and whether an intake air amount cumulative value GAsum is not smaller than a sensor activity judgment intake air amount cumulative value GAsumtg (condition B). When either of the two conditions is satisfied, activity of the air-fuel ratio sensor is judged.
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Barlow John
Khuu Cindy D.
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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