Vehicle control method and vehicle control device

1. A vehicle control method for controlling a vehicle using a vehicle control apparatus that includes a sensor for detecting a state ahead of a subject vehicle and a control device, the vehicle control method comprising:

executing control of recovering a travel trajectory of the subject vehicle to a target trajectory, as ordinary control, by giving a steering amount in a lateral direction with respect to a travel lane of the subject vehicle;

detecting, using the sensor, another vehicle that is traveling in an adjacent lane to the travel lane of the subject vehicle and located ahead of the subject vehicle;

determining whether or not a passing condition is satisfied, wherein the passing condition is one in which the subject vehicle passes the detected other vehicle;

in response to determining that the passing condition is satisfied, increasing a response of the steering amount in a direction of returning the subject vehicle to the target trajectory to a higher response than that in the ordinary control, before the subject vehicle passes the detected other vehicle; and

in response to determining that the passing condition is not satisfied, executing the ordinary control.

2. The vehicle control method according to claim 1 , comprising:

in response to detecting the other vehicle traveling in the adjacent lane ahead of the subject vehicle and the subject vehicle is traveling on a side closer to the detected other vehicle with respect to the target trajectory, setting the response of a steering torque to a first response; and

in response to detecting the other vehicle traveling in the adjacent lane ahead of the subject vehicle and the subject vehicle travels on a side far from the detected other vehicle with respect to the target trajectory, setting the response of the steering torque to a second response, the first response being higher than the second response.

3. The vehicle control method according to claim 1 , further comprising:

calculating a shift amount between the travel trajectory and the target trajectory in the lateral direction; and

increasing the response of the steering amount to the higher response than that in the ordinary control in accordance with the shift amount.

4. The vehicle control method according to claim 1 , further comprising:

when the subject vehicle has passed the detected other vehicle, recovering the response of the steering amount to the response of the steering amount in the ordinary control.

5. A vehicle control apparatus comprising:

a sensor that detects a state ahead of a subject vehicle;

an actuator that gives a steering amount in a lateral direction with respect to a travel lane of the subject vehicle; and

a controller that controls the actuator, the controller configured to:

calculate a control steering amount for the actuator to generate the steering amount in accordance with a shift amount in the lateral direction with respect to the travel lane of the subject vehicle;

execute control of recovering a travel trajectory of the subject vehicle to a target trajectory, as ordinary control, by operating the actuator in accordance with the control steering amount;

detect, using the sensor, another vehicle traveling in an adjacent lane to the travel lane of the subject vehicle and located ahead of the subject vehicle;

determine whether or not a passing condition is satisfied, wherein the passing condition is one in which the subject vehicle passes the detected other vehicle;

when the passing condition is satisfied, control the actuator to increase a response of the steering amount in a direction of returning the subject vehicle to the target trajectory to a higher response than that in the ordinary control, before the subject vehicle passes the detected other vehicle; and

when the passing condition is not satisfied, executing the ordinary control.