Driving control method and system for vehicle

Patent metadata

Field	Value
Publication number	US-2020361465-A1
Application number	US-201916566773-A
Country	US
Kind code	A1
Filing date	Sep 10, 2019
Priority date	May 17, 2019
Publication date	Nov 19, 2020
Grant date	—

Abstract

A method and a system for controlling driving of a vehicle according to a driving intent of a driver in a sports mode, may include determining a situation in which whether sporty driving is required for the vehicle due to an output value reflecting a driving state of the vehicle which is driving in a sports mode, and, when the situation is determined as requiring the sporty driving, controlling, by the controller, the clutch mechanism to release a coupling between the front wheel and the front wheel drive motor for the vehicle to drive in a rear wheel drive manner, and the system to which the method is applied.

First claim

What is claimed is:

1 . A method of controlling driving of a vehicle in which a front wheel drive motor and a rear wheel drive motor are operably provided to independently deliver a driving force to a front wheel and a rear wheel of the vehicle, and a clutch mechanism is mounted between the front wheel and the front wheel drive motor to selectively engage the front wheel and the front wheel drive motor, the method comprising:
determining, by a controller, a situation in which sporty driving is required for the vehicle according to a driving state in the vehicle which is driving in a sports mode; and upon determining that the driving state of the vehicle is the situation in which the sporty driving is required, controlling, by the controller, the clutch mechanism to release a coupling between the front wheel and the front wheel drive motor for the vehicle to drive in a rear wheel drive manner.

2 . The method of claim 1 , further including:
upon determining that a rear wheel slip amount exceeds a first reference value, an opening degree amount of an accelerator pedal exceeds a second reference value, and a steering angle exceeds a third reference value, determining, by the controller, the driving state of the vehicle, as the situation in which the sporty driving is required.

3 . The method of claim 1 , further including:
upon determining that the vehicle is driving in the rear wheel drive manner, raising, by the controller, an execution condition of electronic stability control (ESC) of the vehicle.

4 . The method of claim 1 , further including:
upon determining that the driving state is a situation in which the sporty driving is not required, controlling, by the controller, the clutch mechanism to be engaged to allow the vehicle to drive in a four wheel drive manner.

5 . The method of claim 4 ,
wherein, upon determining that a rear wheel slip amount is smaller than a first reference value, an opening degree amount of an accelerator pedal is smaller than a second reference value, or a steering angle is smaller than a third reference value, determining, by the controller, the driving state of the vehicle as the situation in which the sporty driving is not required.

6 . The method of claim 1 , wherein the clutch mechanism utilizes a dog clutch.

7 . A system for controlling driving of a vehicle in which a front wheel drive motor and a rear wheel drive motor are operably provided to independently deliver a driving force to a front wheel and a rear wheel of the vehicle, and a clutch mechanism is mounted between the front wheel and the front wheel drive motor to selectively engage the front wheel and the front wheel drive motor, the system including:
a controller configured to determine a situation in which sporty driving is required for the vehicle according to a driving state of the vehicle which is driving in a sports mode; and upon determining, by the controller, that the driving state is the situation in which the sporty driving is required, the controller is configured to control the clutch mechanism to release a coupling between the front wheel and the front wheel drive motor for the vehicle to drive in a rear wheel drive manner.

8 . The system of claim 7 , wherein, upon determining that a rear wheel slip amount exceeds a first reference value, an opening degree amount of an accelerator pedal exceeds a second reference value, and a steering angle exceeds a third reference value, the controller is configured to determine the driving state of the vehicle, as the situation in which the sporty driving is required.

9 . The system of claim 7 , wherein, upon determining that the vehicle is driving in the rear wheel drive manner, the controller is configured to raise an execution condition of electronic stability control (ESC) of the vehicle.

10 . The system of claim 7 , wherein, upon determine that the driving state is determined as a situation in which the sporty driving is not required, the controller is configured to control the clutch mechanism to be engaged to allow the vehicle to drive in a four wheel drive manner.

11 . The system of claim 10 , wherein, upon determining that a rear wheel slip amount is smaller than a first reference value, an opening degree amount of an accelerator pedal is smaller than a second reference value, or a steering angle is smaller than a third reference value, the controller is configured to determine the driving state of the vehicle, as the situation in which the sporty driving is not required.

12 . The system of claim 7 , wherein the clutch mechanism utilizes a dog clutch.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Gwi Chul

Classifications

• B60W2300/18

  Four-wheel drive vehicles · CPC title

• B60W10/119

  including control of all-wheel-driveline means, e.g. transfer gears or clutches for dividing torque between front and rear axle (B60W10/14 takes precedence) · CPC title

• B60W2540/18

  Steering angle · CPC title

• B60W50/10 Primary

  Interpretation of driver requests or demands · CPC title

• B60Y2400/82

  Four wheel drive systems · CPC title