Lane Centering System: Notes
DESCRIPTION
| 1 - Mid Range Radars (Front Left, Front Right, Rear Left, Rear Right) |
| 2 - Driver Door Module (DDM) and Passenger Door Module (PDM) |
| 3 - Brake System Module (BSM) |
| 4 - Central Vision Park Assist Module (CVPAM) |
| 5 - Security Gateway Module (SGW) |
| 6 - Display Screen Module (DSM) |
| 7 - Long Range Camera Front (LRCF) |
| 8 - Central ADAS Decision Module (CADM) |
| 9 - Rear View Camera (RVC) |
| 10 - Steering Wheel Sensor Module (SWSM) |
| 11 - Instrument Panel Cluster (IPC) |
| 12 - Body Control Module (BCM) |
| 13 - Night Vision Processing Module (NVPM) |
| 14 - Night Vision Camera Module (NVCM) |
| 15 - Long Range Radar Front (LRRF) |
| 16 - Electric Power Steering (ESP) |
| Not Shown - Auxiliary Switch Bank Module (ASBM) |
Lane centering driver-assistance system that helps the driver guide the vehicle along the center line of controlled access roads when the Adaptive Cruise Control (ACC+) system is engaged. The following are properties of the Lane Centering system:
- The usage of a forward-facing camera wired directly to the Central ADAS Decision Module (CADM) to identify road edges, visible lane markings, and to track lane boundaries.
- The usage of a radar to monitor stationary objects and traffic flow to determine the forward path, and positioning of a forward vehicle.
- Provides a steering torque to keep the vehicle in the center of the lane.
- Active at vehicle speeds between 60 km/h (37 mph) and 180 km/h (112 mph).
- Allows the driver to manually override the system by applying torque into the steering wheel at any time or by activating the left or right turn signal indicators.
- Provides alerts to the driver when the system becomes disengaged or requires driver intervention. Depending on the condition, the alerts may be in the form of:
- Haptic feedback using vibration in the drivers seat.
- Haptic feedback using steering wheel vibration.
- Audible alerts.
- Visual indications using the driver assist screen on the Instrument Panel Cluster (IPC).
The driver is required to remain engaged in the task of driving the vehicle at all times. The Lane Centering system determines driver engagement by using a combination of capacitive sensing by the Steering Wheel Sensor Module (SWSM) plus steering wheel torque sensing by the Electronic Power Steering (EPS) in order to determine whether at least one of the driver's hands is in contact with the steering wheel. If the driver removes both hands from the steering wheel, an initial visual warning is issued to engage the driver. If the driver keeps their hands off the steering wheel continuously, the Lane Centering system escalates the visual warning level. If the driver does not assume control of the vehicle, the Lane Centering system will further escalate efforts to engage the driver via invasive alerts (i.e. audible, visual, haptic notifications). If the driver re-engages during the warning phase, the Lane Centering system will resume normal operation. If the driver still does not assume control of the vehicle, the Lane Centering system enters a safety response mode; at which time, it will ramp out lateral control and return full lateral control of the vehicle to the driver. Momentary "hands off" is considered acceptable misuse. Prolonged continuous "hands off" operation of the Lane Centering system is not considered acceptable misuse and will result in an escalated driver notification strategy to reengage the driver in the driving task. Failure to reengage will cause the Lane Centering system to disengage and return control of the vehicle to the driver.