| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas sensor control device capable of appropriately determining a deterioration state of a gas sensor element.SOLUTION: A gas sensor control device 100, for use in controlling a gas sensor element 10 that includes first and second measurement chambers 159, 161 internally, and a second-chamber pump cell 113 and a pair of electrodes 145, 147 on the second-chamber pump cell 113, includes: first-chamber control means 51-54 for controlling oxygen concentration of a first-chamber gas GM1; second-chamber control means 56 for applying a second-chamber pump voltage Vp2 between the pair of electrodes 145, 147 to apply a concentration current Ip2 in accordance with concentration of an oxygen-containing specific gas within a second-chamber gas GM2 to the pair of electrodes 145, 147; current detection means 55 for detecting a size of the concentration current Ip2; voltage change means 56, S73 for changing the second-chamber pump voltage Vp2; and deterioration determination means S7 for determining a deterioration state of the gas sensor element 10 on the basis of a transient response of the concentration current Ip2 caused in association with changes in the second-chamber pump voltage Vp2. |
