Control device and control method for vehicle
In control over a vehicle, inter-vehicle communication information of a preceding vehicle that runs ahead of the vehicle is acquired, follow-up running control for causing the vehicle to follow the preceding vehicle is executed on the basis of the inter-vehicle communication information, and, during the follow-up running control, a parameter used in the follow-up running control is determined on the basis of a condition in which the inter-vehicle communication information is acquired.
1. A control device for a vehicle, the method comprising:
acquiring inter-vehicle communication information of a preceding vehicle that runs ahead of the vehicle;
executing follow-up running control that causes the vehicle to follow the preceding vehicle based on the inter-vehicle communication information; and
during the follow-up running control, determining a value of a parameter used in the follow-up running control based on either
(1) a duration of a communication breakdown determination time, which is a variable period of time in which it is determined whether communication with the preceding vehicle is lost, and which is used to determine whether there has been a breakdown of an inter-vehicle communication between the vehicle and the preceding vehicle, or
(2) a target value of a rate of occurrence of the breakdown of the inter-vehicle communication, which is a rate at which it is determined that communication with the preceding vehicle is lost within a predetermined period of time, the target value being a variable value.
2. The control method according to claim 1 , wherein
the parameter is an inter-vehicle time or an inter-vehicle distance between the vehicle and the preceding vehicle.
3. The control method according to claim 2 , wherein
a value of the inter-vehicle time or a value of the inter-vehicle distance is determined in the determining step to be longer as the duration of the communication breakdown determination time is increased, and
the value of the inter-vehicle time or the value of the inter-vehicle distance is determined in the determining step to be longer as the target value is decreased.
4. A control device for a vehicle, the control device comprising:
an acquisition unit that acquires inter-vehicle communication information of a preceding vehicle that runs ahead of the vehicle;
a running control unit that executes follow-up running control that causes the vehicle to follow the preceding vehicle based on the inter-vehicle communication information; and
a determining unit that, during the follow-up running control, determines a parameter used in the follow-up running control based on either
(1) a duration of a communication breakdown determination time, which is a period of time in which it is determined whether communication with the preceding vehicle is lost, and which is used to determine whether there has been a breakdown of an inter-vehicle communication between the vehicle and the preceding vehicle, or
(2) a target value of a rate of occurrence of the breakdown of the inter-vehicle communication, which is a rate at which it is determined that communication with the preceding vehicle is lost within a predetermined period of time, the target value being a variable value.
5. The control device according to claim 4 , wherein
the parameter is an inter-vehicle time or an inter-vehicle distance between the vehicle and the preceding vehicle.
6. The control device according to claim 5 , wherein
the determining unit determines a value of the inter-vehicle time or a value of the inter-vehicle distance to be longer as the duration of the communication breakdown determination time is increased, and
the determining unit determines the value of the inter-vehicle time or the value of the inter-vehicle distance to be longer as the target value is decreased.
7. The control method according to claim 1 , wherein
the value of the parameter is changed based on a change in the duration of the communication breakdown determination time or based on a change in the target value of the rate of occurrence of the breakdown of the inter-vehicle communication.
8. The control device according to claim 4 , wherein
the value of the parameter is changed based on a change in the duration of the communication breakdown determination time or based on a change in the target value of the rate of occurrence of the breakdown of the inter-vehicle communication.