| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst deterioration determination device that suppresses increase in cost and has improved safety while having a good appearance.SOLUTION: A catalyst deterioration determination device S includes: a heat conductive member 18 that is provided inside a catalyst 23 provided in an exhaust pipe 16 exhausting exhaust gas to the outside, so as to extend along a direction in which exhaust gas flows, and includes a projecting part 20 and a projecting part 19 respectively provided on the upstream side and downstream side in the direction in which exhaust gas flows so as to project toward the inner center of the catalyst 23; a temperature sensor 21 provided inside the projecting part 19; a temperature sensor 22 provided inside the projecting part 20; and a determination circuit 104 that determines deterioration of the catalyst 23 on the basis of the temperatures detected by the temperature sensors 21, 22.SELECTED DRAWING: Figure 1 |
