Patent ID: 11919505
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 6:
7. A non-transitory computer readable medium storing a control program of a hybrid electric vehicle having an internal combustion engine and an electric motor capable of rotating an output shaft of the internal combustion engine, the internal combustion engine including an air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas, a filter that collects fine particulate matter in the exhaust gas, a first temperature sensor that detects a temperature of the exhaust gas on an upstream side of the filter and a second temperature sensor that detects a temperature of the exhaust gas on a downstream side of the filter,
the control program causing a control device of the hybrid electric vehicle to execute:
a motoring process of rotating the output shaft of the internal combustion engine by the electric motor in a state where fuel supply to cylinders of the internal combustion engine is stopped;
a first diagnosis process of, when first execution conditions including that there is no output demand for the internal combustion engine are met, diagnosing whether the air-fuel ratio sensor has an abnormality based on a detection signal of the air-fuel ratio sensor while executing the motoring process;
a second diagnosis process of, when second execution conditions including that there is no output demand for the internal combustion engine and including that the temperature of the exhaust gas detected by the first temperature sensor or the second temperature sensor is equal to or higher than a specified temperature are met, diagnosing whether the filter has an abnormality based on a difference between the temperature of the exhaust gas on the upstream side of the filter and the temperature of the exhaust gas on the downstream side of the filter or a difference between a temperature change amount of the exhaust gas on the upstream side of the filter and a temperature change amount of the exhaust gas on the downstream side of the filter while executing the motoring process; and
an execution determination process of prohibiting execution of both the first diagnosis process and the second diagnosis process when at least either the first execution conditions or the second execution conditions are not met, and executing both the first diagnosis process and the second diagnosis process when both the first execution conditions and the second execution conditions are met.