Vehicle controller

1. A vehicle controller that performs travel control on a vehicle, wherein the vehicle selects one of a first mode and a second mode as a travel mode and travels in the travel mode, the vehicle consumes electric power of a battery when traveling in the first mode and sustains a storage power amount of the battery when traveling in the second mode, and the vehicle travels along a route from an originating point to a destination, wherein the route includes a plurality of zones, the vehicle controller comprising:

a processor programmed to

form a travel plan that assigns one of the first mode and the second mode to each of the zones included in the route; and

control traveling of the vehicle based on the formed travel plan,

wherein the processor is programmed to set the travel mode of the vehicle to the first mode when the vehicle deviates from the route.

2. The vehicle controller according to claim 1 , wherein when the vehicle deviates from the route and then returns to the route, the processor is programmed to maintain the travel mode of the vehicle in the first mode for a predetermined time or a predetermined distance regardless of the formed travel plan.

3. The vehicle controller according to claim 1 , wherein when the vehicle deviates from the route and then returns to the route, the processor is programmed to maintain the travel mode of the vehicle in the first mode in a zone of the route where the vehicle first travels subsequent to the return regardless of the formed travel plan.

4. The vehicle controller according to claim 1 , wherein when the vehicle deviates from the route and then returns to the route, if the second mode is assigned to a zone of the route where the vehicle first travels subsequent to the return and a distance to a zone where the first mode is assigned for a first time after the zone where the vehicle first travels subsequent to the return is shorter than or equal to a fixed distance, the processor is programmed to maintain the travel mode of the vehicle in the first mode at least until the zone where the first mode is assigned for the first time after the zone where the vehicle first travels subsequent to the return.

5. The vehicle controller according to claim 1 , wherein the processor is programmed to recalculate the route and form a new travel plan when a fixed time elapses from when the vehicle deviates from the route, and

when the vehicle deviates from the route and the route is recalculated, the processor is programmed to maintain the travel mode of the vehicle in the first mode for a predetermined time or a predetermined distance regardless of the newly formed travel plan.

6. The vehicle controller according to claim 5 , wherein

when deviation of the vehicle from the route or the recalculation is repeated for a predetermined number of times or more,

the processor is programmed to maintain the travel mode of the vehicle in the first mode, and

the processor is programmed to stop forming the travel plan.

7. The vehicle controller according to claim 1 , wherein the processor is programmed to recalculate the route and form a new travel plan when a fixed time elapses from when the vehicle deviates from the route, and

when the vehicle deviates from the route and the route is recalculated, the processor is programmed to maintain the travel mode of the vehicle in the first mode in a zone of the route where the vehicle first travels subsequent to the recalculation regardless of the newly formed travel plan.

8. The vehicle controller according to claim 1 , wherein the processor is programmed to recalculate the route and form a new travel plan when a fixed time elapses from when the vehicle deviates from the route, and

when the vehicle deviates from the route and the route is recalculated, if the second mode is assigned to a zone of the route where the vehicle first travels subsequent to the recalculation and a distance to a zone where the first mode is assigned for a first time after the zone where the vehicle first travels subsequent to the recalculation is shorter than or equal to a fixed distance, the processor is programmed to maintain the travel mode of the vehicle in the first mode at least until the zone where the first mode is assigned for the first time after the zone where the vehicle first travels subsequent to the recalculation.

9. A vehicle controller that performs travel control on a vehicle, wherein the vehicle selects one of a first mode and a second mode as a travel mode and travels in the travel mode, the vehicle gives priority to driving of a motor while limiting or prohibiting driving of an internal combustion engine when traveling in the first mode, the vehicle drives at least one of the motor and the internal combustion engine when traveling in the second mode, and the vehicle travels along a route from an originating point to a destination, wherein the route includes a plurality of zones, the vehicle controller comprising:

a processor programmed to

form a travel plan that assigns one of the first mode and the second mode as the travel mode to each of the zones included in the route; and

control traveling of the vehicle based on the formed travel plan, wherein the processor is programmed to forcibly set the travel mode of the vehicle in the first mode when the vehicle deviates from the route.

10. A method of travel control on a vehicle performed by a vehicle controller, the method comprising:

selecting one of a first mode and a second mode as a travel mode and the vehicle traveling in the travel mode;

consuming electric power of a battery when the vehicle traveling in the first mode;

sustaining a storage power amount of the battery when the vehicle traveling in the second mode;

traveling by the vehicle along a route from an originating point to a destination, wherein the route includes a plurality of zones;

forming a travel plan that assigns one of the first mode and the second mode to each of the zones included in the route;

controlling traveling of the vehicle based on the formed travel plan; and

setting the travel mode of the vehicle to the first mode when the vehicle deviates from the route.

11. A method of travel control on a vehicle performed by a vehicle controller, the method comprising:

selecting one of a first mode and a second mode as a travel mode and the vehicle traveling in the travel mode;

giving priority to driving of a motor while limiting or prohibiting driving of an internal combustion engine when the vehicle traveling in the first mode;

driving at least one of the motor and the internal combustion engine when the vehicle traveling in the second mode;

traveling by the vehicle along a route from an originating point to a destination, wherein the route includes a plurality of zones;

forming a travel plan that assigns one of the first mode and the second mode as the travel mode to each of the zones included in the route;

controlling traveling of the vehicle based on the formed travel plan; and

forcibly setting the travel mode of the vehicle in the first mode when the vehicle deviates from the route.