Vehicle driving assistance apparatus, vehicle driving assistance method, and storage medium storing vehicle driving assistance program

A vehicle driving assistance method for executing an intermittent driving control of driving a host vehicle by autonomously and alternately executing a propelling control of propelling the host vehicle and a coasting control of causing the host vehicle to coast,

• wherein a driving apparatus which generates mechanical power and a battery which stores electric power are mounted on the host vehicle,
• the driving apparatus includes an internal combustion engine and a motor generator,
• the motor generator operates by electric power supplied from the battery to generate mechanical power and also operates by mechanical power generated by the internal combustion engine to generate electric power,
• electric power generated by the motor generator is stored in the battery,
• the propelling control is a control of propelling the host vehicle by mechanical power generated by the internal combustion engine and/or the motor generator,
• the vehicle driving assistance method comprises a step of not executing the intermittent driving control when a prohibition condition is satisfied in a situation where execution of the intermittent driving control is requested, and
• the prohibition condition is satisfied when at least one of the following is satisfied:
• a first condition that an amount of electric power stored in the battery is equal to or smaller than a predetermined prohibition stored electric amount;
• a second condition that a consumption rate of electric power stored in the battery is equal to or greater than a predetermined prohibition consumption rate;
• a third condition that a traveling speed of the host vehicle is equal to or smaller than a predetermined prohibition speed;
• a fourth condition that a following vehicle cannot be detected;
• and
• a fifth condition that the driving apparatus is operated in an operation mode in which an electric drive traveling state in which only mechanical power generated by the motor generator is used without using mechanical power generated by the internal combustion engine as mechanical power for driving the host vehicle occurs.

A computer-readable storage medium storing a vehicle driving assistance program which executes an intermittent driving control of driving a host vehicle by autonomously and alternately executing a propelling control of propelling the host vehicle and a coasting control of causing the host vehicle to coast,

• wherein a driving apparatus which generates mechanical power and a battery which stores electric power are mounted on the host vehicle,
• the driving apparatus includes an internal combustion engine and a motor generator,
• the motor generator operates by electric power supplied from the battery to generate mechanical power and also operates by mechanical power generated by the internal combustion engine to generate electric power,
• electric power generated by the motor generator is stored in the battery,
• the propelling control is a control of propelling the host vehicle by mechanical power generated by the internal combustion engine and/or the motor generator,
• the vehicle driving assistance program is configured not to execute the intermittent driving control when a prohibition condition is satisfied in a situation where execution of the intermittent driving control is requested, and
• the prohibition condition is satisfied when at least one of the following is satisfied:
• a first condition that an amount of electric power stored in the battery is equal to or smaller than a predetermined prohibition stored electric amount;
• a second condition that a consumption rate of electric power stored in the battery is equal to or greater than a predetermined prohibition consumption rate;
• a third condition that a traveling speed of the host vehicle is equal to or smaller than a predetermined prohibition speed;
• a fourth condition that a following vehicle cannot be detected;
• and
• a fifth condition that the driving apparatus is operated in an operation mode in which an electric drive traveling state in which only mechanical power generated by the motor generator is used without using mechanical power generated by the internal combustion engine as mechanical power for driving the host vehicle occurs.