A vehicle controller configured to control a vehicle, the vehicle comprising an internal combustion engine capable of transmitting rotational power of a crankshaft to a driven wheel;
- a catalyst arranged in an exhaust passage of the internal combustion engine;
- a heater configured to generate heat by consuming electric power with the catalyst as a subject to be heated;
- a driving circuit configured to supply the heater with electric power of a battery;
- a breaking circuit configured to break an electrical path between the battery and the driving circuit;
- and an electric generator configured to convert the rotational power of the crankshaft into electric power and supply the driving circuit with the electric power, wherein the vehicle controller is configured to execute:
- an anomaly determination process of determining whether an anomaly where power is constantly supplied from the battery to the heater has occurred in the driving circuit;
- a breaking process of breaking the electrical path by operating the breaking circuit when determining that the anomaly has occurred in the driving circuit;
- and
- a duty cycle control process of alternately repeating an electric power generation execution period, during which the electric generator generates power, and an electric power generation stop period, during which the electric generator does not generate power, and controlling a duty cycle, which is a ratio of the electric power generation execution period to a single cycle of repeated cycles, when determining that the anomaly has occurred in the driving circuit, wherein the duty cycle control process includes at least one of two processes, which are a process of setting the duty cycle to be larger when a member in an overheatable region, in which overheating is possibly performed by the heater, has a low temperature than when the member has a high temperature and a process of setting the duty cycle to be larger when the internal combustion engine has a large intake air amount than when the internal combustion engine has a small intake air amount;
- an idling process of controlling a rotational speed of the crankshaft of the internal combustion engine to a target rotational speed when an accelerator operation amount is zero;
- a setting process of setting the target rotational speed to be a larger value when determining that the anomaly has occurred in the driving circuit than when determining that the anomaly has not occurred in the driving circuit;
- and
- an amount decreasing process of decreasing an amount of fuel injected from a fuel injection valve of the internal combustion engine to a larger extent in a case in which the idling process is stopped to switch to control corresponding to the accelerator operation amount when determining that the anomaly has occurred in the driving circuit than in a case in which the idling process is stopped to switch to control corresponding to the accelerator operation amount when determining that the anomaly has not occurred in the driving circuit.