Vehicle control method and vehicle control device

1. A vehicle control method comprising:

controlling a drive torque of a drive source that drives a vehicle using a drive source controller;

detecting a stroke amount of a brake pedal using a stroke sensor;

controlling automatic braking when a required braking torque is generated regardless of a brake pedal operation by a driver using a braking force controller;

outputting an ON signal using a brake switch when the brake pedal is depressed due to the brake pedal operation by the driver and when an operation of the automatic braking; and

calculating a brake required torque and a drive source required torque necessary for constant speed travel or travel to follow a preceding vehicle;

outputting the drive source required torque to the drive source controller;

outputting the brake required torque to the braking force controller to perform cruise control; and

prohibiting acceptance of the drive source required torque when the automatic braking control is activated during the cruise control, or not outputting the drive source required torque to the drive source controller when the automatic braking control is activated during the cruise control.

2. The vehicle control method according to claim 1 , wherein

the drive source controller accepts the drive source required torque from the cruise control unit when the vehicle speed becomes less than or equal to a prescribed vehicle speed during prohibition of acceptance of the drive source required torque from the cruise control unit.

3. The vehicle control method according to claim 1 , wherein

when the automatic braking control is activated during cruise control and the drive source required torque is a deceleration that is greater than a prescribed deceleration, the drive source controller controls the drive source such that the torque becomes a preset prescribed coasting torque instead of the drive source required torque.

4. A vehicle control device comprising:

a drive source controller configured to control a drive torque of a drive source that drives a vehicle;

a stroke sensor that detects a stroke amount of a brake pedal;

a braking force controller configured to control automatic braking when a required braking torque is generated regardless of a brake pedal operation by a driver;

a brake switch that output an ON signal when the brake pedal is depressed due to both the brake pedal operation by the driver and an operation of the automatic braking; and

a cruise controller configured to calculate a brake required torque and a drive source required torque necessary for constant speed travel or travel to follow a preceding vehicle, the cruise controller being configured to output the drive source required torque to the drive source control unit, and the cruise controller being configured to perform cruise control for outputting the brake required torque to the braking force controller,

the drive source controller being configured to prohibit acceptance of the drive source required torque from the cruise controller when the automatic braking control is activated during the cruise control, or not output the drive source required torque to the drive source controller when the automatic braking control is activated during the cruise control.

5. The vehicle control device according to claim 4 , wherein

the drive source controller is configured to accept the drive source required torque from the cruise control unit when the vehicle speed becomes less than or equal to a prescribed vehicle speed during prohibition of acceptance of the drive source required torque from the cruise control unit.

6. The vehicle control device according to claim 4 , wherein

when the automatic braking control is activated during cruise control and the drive source required torque is a deceleration that is greater than a prescribed deceleration, the drive source controller is configured to control the drive source such that the torque becomes a preset prescribed coasting torque instead of the drive source required torque.