Back to results
US 2008/0184774 A1Published application
Gas sensor controller
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKeiichiro Aoki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKeiichiro Aoki
Estimating the term…
An ECU controls an A/F sensor that is provided in an exhaust system of an internal combustion engine and produces current outputs corresponding to the concentration of oxygen in exhaust gas by being supplied with voltage and produces voltage outputs corresponding to the concentration of oxygen in exhaust gas according to the difference between the oxygen concentration around one of a pair of electrodes of the A/F sensor and the oxygen concentration around the other electrode. The ECU has: an energization limitation portion that, when moisture content is adhering on an inner face of an exhaust passage near the A/F sensor, energizes a heater of the A/F sensor while limiting the amount of power supplied thereto; and a specific output obtaining portion that obtains voltage outputs from the A/F sensor at least when the energization limitation portion is energizing the heater while limiting the amount of power supplied thereto.
A gas sensor controller for controlling a gas sensor that is provided in an exhaust system of an internal combustion engine and produces current outputs corresponding to the concentration of a detection target substance in exhaust gas by being supplied with voltage and produces voltage outputs corresponding to the concentration of a detection target substance in exhaust gas according to the difference between the concentration of the detection target substance around one of a pair of electrodes of the gas sensor and the concentration of the detection target substance around the other of the electrodes, the gas sensor controller comprising:
Dependencies are inferred from the claim text.