Oxygen sensor control device
AssigneeDenso Corporation
InventorKoji MORISHITA
Life of this patent
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Abstract
A voltage application detection unit detects an impedance of an oxygen sensor, which outputs a signal corresponding to a concentration of oxygen, based on a current change amount in the oxygen sensor caused by application of a voltage to the oxygen sensor. A current application detection unit detects the impedance based on a voltage change amount generated across the oxygen sensor caused by application of a current to the oxygen sensor. A detection switching unit switches between the voltage application detection unit and the current application detection unit to detect the impedance based on a state of the oxygen sensor.
Claims11
An oxygen sensor control device configured to control an oxygen sensor, the oxygen sensor configured to output a signal corresponding to a concentration of oxygen, the oxygen sensor control device comprising:
- a voltage application detection unit configured to detect an impedance of the oxygen sensor based on a current change amount in the oxygen sensor caused by application of a voltage to the oxygen sensor;
- a current application detection unit configured to detect the impedance based on a voltage change amount generated across the oxygen sensor caused by application of a current to the oxygen sensor;
- and
- a detection switching unit configured to switch between the voltage application detection unit and the current application detection unit to detect the impedance based on a state of the oxygen sensor.
An oxygen sensor control device configured to control an oxygen sensor, the oxygen sensor configured to output a signal corresponding to a concentration of oxygen, the oxygen sensor control device comprising:
- at least of one processor configured to execute instructions to perform:
- detecting an impedance of the oxygen sensor based on a current change amount in the oxygen sensor caused by application of a voltage to the oxygen sensor;
- detecting the impedance based on a voltage change amount generated across the oxygen sensor caused by application of a current to the oxygen sensor;
- and
- switching between the voltage application detection unit and the current application detection unit to detect the impedance based on a state of the oxygen sensor.
Dependencies are inferred from the claim text.