Driving assistance method and driving assistance device

A driving assistance method comprising:

• a step of detecting a plurality of malfunctions in devices mounted on a vehicle;
• a step of detecting a traveling restriction of the vehicle;
• and
• a step of informing a driver of the traveling restriction,
• wherein, when a plurality of traveling restrictions are detected in association with the detected plural malfunctions, the informing step informs the driver of a traveling restriction having a higher priority chosen from the detected plural traveling restrictions, and
• the plural traveling restrictions include a state in which vehicle's traveling is restricted and a state in which the vehicle cannot start up next.

A driving assistance method comprising:

• a step of detecting a plurality of malfunctions in devices mounted on a vehicle;
• a step of selecting candidates for a plurality of actions urged on the driver in accordance with the detected plural malfunctions;
• a step of detecting a traveling restriction of the vehicle;
• and
• a step of calculating a restriction value of the traveling restriction based on the plural malfunctions,
• wherein the devices include at least a generator, an engine, auxiliary equipment, a drive motor, and a battery,
• pieces of information on the plural malfunctions include restriction values of the respective devices,
• the calculating step calculates a maximum speed and a maximum drive force of the vehicle as the restriction value of the traveling restriction in accordance with the restriction values of the respective devices, and
• an action having a higher priority is chosen from the selected plural actions in accordance with the maximum speed and the maximum drive force.

A driving assistance device comprising:

• a sensor configured to detect a plurality of malfunctions in devices mounted on a vehicle;
• a traveling restriction detection circuit configured to detect a traveling restriction of the vehicle;
• and
• an information circuit configured to inform the driver of the traveling restriction detected by the traveling restriction detection circuit,
• wherein, when the traveling restriction detection circuit detects a plurality of traveling restrictions based on the plural malfunctions detected by the sensor, the information circuit informs the driver of a traveling restriction having a higher priority chosen from the detected plural traveling restrictions, and
• the plural traveling restrictions include a state in which vehicle's traveling is restricted and a state in which the vehicle cannot start up next.