Electronic 4wd system having reinforced abs cooperative control performance and method of controlling same

Patent metadata

Field	Value
Publication number	US-2016101777-A1
Application number	US-201514720733-A
Country	US
Kind code	A1
Filing date	May 22, 2015
Priority date	Oct 10, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

The present invention relates to an electronic 4 WD system having reinforced ABS cooperative control performance, in which an ABS ACT signal by an ABS (Anti-Lock Brake System) controller and a 4 WD_OPEN signal by the ESC (Electronic Stability Control) controller are used. When the ABS ACT signal and the 4 WD_OPEN signal are recognized, it is determined that it is an ESC vehicle and a 4 WD mode is stopped. When only the ABS ACT signal is recognized, it is determined that it is an ABS vehicle and the intention of a user is determined on the basis of whether a brake pedal has been pressed down or an accelerator pedal has been released, and then a 4 WD mode is stopped.

First claim

What is claimed is:

1 . A method of controlling an electronic 4 WD system having reinforced Anti-Lock Brake System (ABS) cooperative control performance, the method comprising:
(A) recognizing, by an electronic 4 WD system, an ABS ACT signal by an ABS controller and a 4 WD_OPEN signal by an ESC (Electronic Stability Control) controller; (B) determining that a driver intends to brake a vehicle and stopping a 4 WD mode, when the ABS ACT signal and the 4 WD_OPEN signal are both recognized; (C) determining whether the vehicle is braked by intention of the driver on the basis of a brake pedal signal, when only the ABS ACT signal is recognized; and (D) stopping the 4 WD mode upon determination that the vehicle is braked by intention of the driver when the brake pedal signal is transmitted, or maintaining the 4 WD mode upon determination that the vehicle is braked regardless of intention of the driver, when the brake pedal signal is not transmitted.

2 . The method of claim 1 , wherein the determining whether the vehicle is braked by intention of the driver further uses a signal showing release of an accelerator pedal.

3 . The method of claim 2 , wherein the signal showing release of the accelerator pedal is an OFF-signal.

4 . An electronic 4 WD system having reinforced Anti-Lock Brake System (ABS) cooperative control performance, wherein an ABS controller and an Electronic Stability Control (ESC) controller are connected by CAN communication, and
the system includes an ABS sub-logic that determines that it is an ESC vehicle and stops a 4 WD mode when an ABS ACT signal by the ABS controller and a 4 WD_OPEN signal by the ESC controller are both recognized, and determines that it is an ABS SOLO vehicle when only the ABS ACT signal is recognized, and stops the 4 WD mode only when a signal indicating that a brake pedal has been pressed down or a signal indicating that an accelerator pedal has been released is detected.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lim Sung-Keun

Classifications

• B60W50/10

  Interpretation of driver requests or demands · CPC title

• B60W2540/10

  Accelerator pedal position · CPC title

• B60W2540/12

  Brake pedal position · CPC title

• B60T8/1755

  Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve (road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02) · CPC title

• B60W30/02 Primary

  Control of vehicle driving stability · CPC title