Exhaust sensor
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United States of America Patent
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Sep 11, 2018
Grant Date -
Jan 4, 2018
app pub date -
Jun 29, 2017
filing date -
Jul 4, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An exhaust sensor 1 comprises a sensor cell 51, a voltage application circuit 61, a current detection circuit 62 and a concentration calculating part 80a. The current detection circuit detects a first current flowing through the sensor cell when fuel cut control is being performed in the internal combustion engine and a predetermined voltage is applied from the voltage application circuit to the sensor cell, and detect a second current flowing through the sensor cell when normal control is being performed in the internal combustion engine and the predetermined voltage is applied from the voltage application circuit to the sensor cell. The concentration calculating part is configured to calculate the concentration higher with respect to the second current when the first current is relatively low compared with when the first current is relatively high.
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