Patent ID: 11891934
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 0:
1. A controller for an internal combustion engine, wherein
an exhaust purification device is disposed in an exhaust passage of the internal combustion engine,
the controller comprises processing circuitry,
the processing circuitry is configured to execute a regeneration process, a first change amount calculating process, a second change amount calculating process, a determination process, and an anomaly diagnosing process,
the regeneration process is a process of burning and removing particulate matter accumulated in the exhaust purification device,
the first change amount calculating process is a process of calculating a first change amount that is a change amount per unit time of an upstream-side temperature, the upstream-side temperature being a temperature of exhaust gas on an upstream side of the exhaust purification device,
the second change amount calculating process is a process of calculating a second change amount that is a change amount per unit time of a downstream-side temperature, the downstream-side temperature being a temperature of exhaust gas on a downstream side of the exhaust purification device,
the determination process is a process of determining that a deviation between the first change amount and the second change amount is less than or equal to a threshold, the anomaly diagnosing process is a process of determining that the exhaust purification device is in a detached state when it is determined in the determination process that the deviation is less than or equal to the threshold, and
after executing the regeneration process, the processing circuitry is configured to not execute the determination process during a period from the end of the regeneration process to when a post-regeneration execution condition is met.