Description and Operation

Description

LKAS (Lane Keeping Assist System): The system is designed to help recognize the lane ahead and provide a lane departure warning when the vehicle begins to drift out of its lane, using the camera image and vehicle signal information. Typical operating conditions of the LKAS controller. Note that the operating conditions are adapted to customer requirements.

• Vehicle speed within 60 km/h – 200 km/h
• Lane markings are clearly visible.
• Driver does not overload the system by applying excessive torque to the steering wheel.
• Turn signals (including hazard warning signals) are off.
• Lane width from 2.7 m to 4.2 m.
• Lane curvature greater than 250 m.
• Absolute lateral acceleration of the vehicle < 2.5 m/s2.
• Driver's hands on the steering wheel.
• Vehicle does not exceed the lane boundaries by more than 0.3 m.
• Absolute steering wheel angle < specified value (for example, 90 degrees)
• Maximum allowable application time of maximum torque is not exceeded. (90 seconds)
• Reverse or city mode EPS is not activated.
• No system malfunctions are present.

Block Diagram

System Operation

1. 1
   Lane Keeping Assist System (LKAS): The system is designed to help recognize the lane ahead and provide a lane departure warning when the vehicle begins to drift out of its lane, using the camera image and vehicle signal information.
2. 2
   High Beam Assist (HBA): Detects headlights and taillights of vehicles ahead and turns the high beams on/off.

   

3. 3
   Press the LKAS switch to turn on the LKAS indicator on the instrument cluster and the lane departure warning system status display in the center of the instrument cluster. The various LDWS states are shown in the following table.

   Lane not detected	Lane detected and LKAS is on	LKAS canceled
   Right-side departure	Left-side departure	LKAS canceled

4. 4
   High Beam Assist (Multifunction Switch Auto/High Beam Position)

   Description	Show Status in Cluster	Notes
   Illuminates in the cluster when HBA is on.		Vehicle speed of 45 km/h and above

5. 5
   When the LKAS switch is pressed, LKAS is turned on while the LDWS indicator is illuminated. When the LKAS switch is pressed again, LKAS is turned off and the indicator goes off.

   

6. 6
   High Beam Assist Switch: The automatic high beam control system is activated if the lighting switch on the multifunction switch is set to AUTO and the lighting switch is set to high beam (pressed).

   A.	If the lighting switch is not set to AUTO or high beam, the automatic high beam control system is deactivated.

   

7. 7
   Visual warning: A warning is displayed in the instrument cluster.
8. 8
   Audible warning: A warning sound is emitted from the speakers connected to the instrument cluster or, if an external amplifier is present, from the speakers connected to the external amplifier.

Lane Keeping Assist Display (Instrument Panel) LKAS ON/OFF Switch Warning

LKAS may recognize continuous lines as lane markings and has limited lane recognition capability on sharp road curves. In addition, the system may malfunction in the following cases: Lane markings are missing or worn (lane could not be identified). Poor visibility due to bad weather conditions. Low light or sudden changes in external lighting conditions. Sharp road curves (curvature radius less than 250 m). Sidewalks and other separating structures along the edge of the lane. Dirty windshield (poor camera visibility).