Vehicle driving control method and vehicle control device

1 . A vehicle driving control method comprising:

determining whether a motion sickness prevention mode is entered, based on road condition information and user-configured information about whether to activate the motion sickness prevention mode, while a vehicle is driving; and

controlling, when the motion sickness prevention mode is entered, the vehicle by varying driving control factors, which comprises at least one of longitudinal limit acceleration, a hydraulic braking amount, a regenerative braking amount, a braking distribution ratio, and a shift gear configured for the vehicle, depending on whether the vehicle accelerates or decelerates in a low-speed driving situation where the vehicle's speed is equal to or lower than a predetermined first reference speed;

wherein the controlling comprises:

limiting longitudinal acceleration of the vehicle when the vehicle accelerates in the low-speed driving situation; and

when the vehicle decelerates, applying neutral N when the vehicle's speed reaches a predetermined second reference speed by performing the deceleration through a braking distribution ratio having a large regenerative braking amount compared to a hydraulic braking amount;

wherein applying the neutral N comprises determining, based on the road condition information, whether a road on which the vehicle is traveling is flat when the vehicle's speed reaches the predetermined second reference speed while the vehicle decelerates through the regenerative braking, and applying the neutral N when the road is determined to be flat;

wherein the method further comprises, after the controlling, controlling the input of the brake-pedal position sensor to be released when the neutral N is applied and the vehicle's speed decelerates to a predetermined third reference speed or lower, and activating an electronic parking brake when the input of the brake-pedal position sensor is released and the vehicle decelerates to a stop.

2 . The vehicle driving control method of claim 1 , wherein the controlling comprises limiting the longitudinal acceleration of the vehicle based on the longitudinal limit acceleration varied during acceleration in the low-speed driving situation when an accelerator-pedal position sensor receives an input.

3 . The vehicle driving control method of claim 2 , wherein the longitudinal limit acceleration is varied based on different acceleration change rates depending on at least one of a targeted degree of acceleration of the vehicle and a targeted degree of prevention of a user's motion sickness.

4 . The vehicle driving control method of claim 2 , wherein the controlling comprises limiting the longitudinal acceleration of the vehicle based on the longitudinal limit acceleration until the vehicle's speed exceeds the first reference speed in case that the vehicle accelerates in the low-speed driving situation.

5 . The vehicle driving control method of claim 1 , wherein the controlling comprises:

determining a deceleration demand torque corresponding to a sensing value of a brake-pedal position sensor when the brake-pedal position sensor receives an input in the low-speed driving situation; and

applying the neutral N when the vehicle's speed reaches the predetermined second reference speed by performing deceleration through regenerative braking in case that the deceleration demand torque is less than a predetermined reference torque.

6 . The vehicle driving control method of claim 1 , wherein the controlling comprises controlling, when the vehicle decelerates in the low-speed driving situation, the vehicle to decelerate through the regenerative braking while following a preconfigured braking vehicle speed profile for reducing motion sickness.

7 . The vehicle driving control method of claim 6 , wherein the controlling of the vehicle to decelerate comprises controlling, when the vehicle decelerates in the low-speed driving situation, the vehicle to decelerate through the regenerative braking while following the braking vehicle speed profile in consideration of a preconfigured one of multiple regenerative braking detailed setting modes having different regenerative braking reduction amounts depending on vehicle speed.

8 . A vehicle control device comprising:

an execution determination unit configured to determine whether a motion sickness prevention mode is entered, based on road condition information and user-configured information about whether to activate the motion sickness prevention mode, while a vehicle is driving; and

a controller configured to control, when the motion sickness prevention mode is entered, the vehicle by varying driving control factors, which comprises at least one of longitudinal limit acceleration, a hydraulic braking amount, a regenerative braking amount, a braking distribution ratio, and a shift gear configured for the vehicle, depending on whether the vehicle accelerates or decelerates in a low-speed driving situation where the vehicle's speed is equal to or lower than a predetermined first reference speed;

wherein the controller is configured to:

limit longitudinal acceleration of the vehicle when the vehicle accelerates in the low-speed driving situation;

apply, in case that the vehicle decelerates, neutral N when the vehicle's speed reaches a predetermined second reference speed by performing the deceleration through a braking distribution ratio having a large regenerative braking amount compared to a hydraulic braking amount;

determine, based on the road condition information, whether a road on which the vehicle is traveling is flat when the vehicle's speed reaches the predetermined second reference speed while the vehicle decelerates through the regenerative braking, and apply the neutral N when the road is determined to be flat;

control the input of the brake-pedal position sensor to be released when the neutral N is applied and the vehicle's speed decelerates to a predetermined third reference speed or lower; and

activate an electronic parking brake when the input of the brake-pedal position sensor is released and the vehicle decelerates to a stop.

9 . The vehicle control device of claim 8 , wherein the controller is configured to limit the longitudinal acceleration of the vehicle based on the longitudinal limit acceleration varied during acceleration in the low-speed driving situation in case that an accelerator-pedal position sensor receives an input.

10 . The vehicle control device of claim 9 , wherein the longitudinal limit acceleration is varied based on different acceleration change rates depending on at least one of a targeted degree of acceleration of the vehicle and a targeted degree of prevention of a user's motion sickness.

11 . The vehicle control device of claim 9 , wherein the controller is configured to limit the longitudinal acceleration of the vehicle based on the varied longitudinal limit acceleration until the vehicle's speed exceeds the first reference speed in case that the vehicle accelerates in the low-speed driving situation.

12 . The vehicle control device of claim 8 , wherein the controller is configured to:

determine a deceleration demand torque corresponding to a sensing value of a brake-pedal position sensor in case that the brake-pedal position sensor receives an input in the low-speed driving situation; and

apply the neutral N when the vehicle's speed reaches the predetermined second reference speed by performing deceleration through regenerative braking in case that the deceleration demand torque is less than a predetermined reference torque.

13 . The vehicle control device of claim 8 , wherein the controller is configured to, when the vehicle decelerates in the low-speed driving situation, control the vehicle to decelerate through the regenerative braking while following a preconfigured braking vehicle speed profile for reducing motion sickness.

14 . The vehicle control device of claim 13 , wherein the controller is configured to, when the vehicle decelerates in the low-speed driving situation, control the vehicle to decelerate through the regenerative braking while following the braking vehicle speed profile in consideration of a preconfigured one of multiple regenerative braking detailed setting modes having different regenerative braking reduction amounts depending on vehicle speed.