Gas sensor control device

A gas sensor control device for a gas sensor including a first cell and a second cell each having a solid electrolytic element and a pair of electrodes disposed on the solid electrolytic element, the gas sensor discharging an oxygen in a detected gas introduced into a gas chamber, by using the first cell, and the gas sensor detecting a concentration of a specific component from a gas after the oxygen is discharged, by using the second cell, the gas sensor control device comprising:

• a CPU and a storage memory storing instructions which upon execution by the CPU provides a configuration to at least perform:
• an oxygen discharge amount change which includes sending an instruction to change a voltage of the first cell to thereby temporarily change an oxygen discharge amount that is an amount of the oxygen that is discharged, by the first cell;
• a first calculation which calculates an actual discharge amount that is an actual amount of a change of the oxygen discharged when the oxygen discharge amount is changed by the oxygen discharge amount change;
• a second calculation which calculates an amount of output change which occurs in the second cell as a result of changing the oxygen discharge amount by the oxygen discharge amount change;
• and
• a control which performs at least either correction of the concentration of the specific component as detected by the second cell or deterioration diagnosis of the second cell, based on the actual discharge amount as calculated by the first calculation and the amount of output change of the second cell as calculated by the second calculation;
• wherein:
• the oxygen discharge amount change temporarily decreases the amount of oxygen discharge by the first cell;
• the first calculation calculates an amount of a decrease of an actual oxygen discharge as a result of decreasing the amount of oxygen discharge by the first cell, as the actual discharge amount;
• the second calculation calculates an increase amount of output change of the second cell as a result of decreasing the amount of oxygen discharge by the first cell;
• and
• the control performs at least either the correction of the concentration or the deterioration diagnosis, based on the amount of the decrease of the actual oxygen discharge as calculated by the first calculation and the amount of output increase in the second cell as calculated by the second calculation.

A gas sensor control device for a gas sensor including a first cell and a second cell each having a solid electrolytic element and a pair of electrodes disposed on the solid electrolytic element, the gas sensor discharging an oxygen in a detected gas introduced into a gas chamber, by using the first cell, and the gas sensor detecting a concentration of a specific component from a gas after the oxygen is discharged, by using the second cell, the gas sensor control device comprising:

• a CPU and a storage memory storing instructions which upon execution by the CPU provides a configuration to at least perform:
• an oxygen discharge amount change which includes sending an instruction to change a voltage of the first cell to thereby temporarily change an oxygen discharge amount that is an amount of the oxygen that is discharged, by the first cell;
• a first calculation which calculates an actual discharge amount that is an actual amount of a change of the oxygen discharged when the oxygen discharge amount is changed by the oxygen discharge amount change;
• a second calculation which calculates an amount of output change which occurs in the second cell as a result of changing the oxygen discharge amount by the oxygen discharge amount change;
• a control which performs at least either correction of the concentration of the specific component as detected by the second cell or deterioration diagnosis of the second cell, based on the actual discharge amount as calculated by the first calculation and the amount of output change of the second cell as calculated by the second calculation;
• and
• a setting which, when the oxygen discharge amount is changed by the oxygen discharge amount change, varies the oxygen discharge amount depending on the concentration of the specific component before change of the oxygen discharge amount.