Table of Contents
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Table of Contents
F01 KAFAS
Subject
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Multifunction Video Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Lane Departure Warning and High-beam Assistant . . . . . . . . . . . . . . . .5
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Lane Departure Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
High-beam Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Functional Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Lane Departure Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Lane Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Roadway Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Physical Limitations of the Optical System . . . . . . . . . . . . . . . . . . . .16
Display and Control Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Lane departure warning displays . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Active Cruise Control with Stop & Go . . . . . . . . . . . . . . . . . . . . . .18
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Signal path for controlling the vibration actuator . . . . . . . . . . . . .21
High-beam Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Operation and Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Evaluation of Image Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Control of the High-beam Headlights . . . . . . . . . . . . . . . . . . . . . . . . . .29
System limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Lane Departure Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
High-beam Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Low-sensitivity Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Check Control Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Initial Print Date: 01/09
Revision Date:
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Table of Contents
Summary of Contents for Kafas F02
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Page 1: Table Of Contents
Table of Contents F01 KAFAS Subject Page Introduction ..........3 Multifunction Video Camera . - Page 2 Production: From Start of Production After completion of this module you will be able to: • Describe the systems that are part of the KAFAS system • Understand the Headlight Assistant (FLA) on the F01/F02 • Understand the Lane Departure warning on the F01/F02 •...
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Page 3: Introduction
Introduction Multifunction Video Camera With the F01/F02, the customer is able to choose from a comprehensive range of optional driver assistance systems. The individual systems and function units are becoming ever more densely networked as a result of the shared use of components and signals in some areas. - Page 4 • Lane Departure Warning • Active Blind Spot Detection The vehicle comes fitted with the KAFAS control unit and camera. The high-beam assis- tant option shares the KAFAS camera and the KAFAS control unit with the lane departure warning system. Options/Technical...
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Page 5: System Overview
System Overview Lane Departure Warning and High-beam Assistant The overview below illustrates the components used in combining these systems. System overview of KAFAS components F01 KAFAS... - Page 6 System overview of KAFAS components legend Index Explanation Index Explanation Lane departure warning/High-beam assistant Instrument cluster forward-pointing video camera Function display KAFAS control unit Head-up display (HUD) (Equipment specification with lane Function display departure warning, evaluation of image data) Driver assistance systems operating unit...
- Page 7 Circuit diagram KAFAS with lane departure warning and high-beam assistant F01 KAFAS...
- Page 8 Circuit diagram KAFAS with lane departure warning and high-beam assistant legend Index Explanation Index Explanation Lane departure warning/ High-beam assistant Instrument cluster forward-pointing video camera Function display KAFAS control unit Head-up display (HUD) (Equipment specification with lane Function display departure warning, evaluation of image data)
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Page 9: System Components
System Components Lane Departure Warning In the F01/F02, a front facing video camera and the corresponding button in the BEFAS control panel indicate that the vehicle is equipped with the lane departure warning. Video camera for lane departure warning Driver assistance control panel with lane departure warning... - Page 10 The image data recorded by the video camera are transmitted to the KAFAS control unit along an LVDS data line. The video camera and the control unit are the components that are fundamental to the lane departure warning’s range of functions.
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Page 11: High-Beam Assistant
High-beam Assistant In combination with the lane departure warning, the high-beam assistant function shares the same video camera and the same KAFAS control unit. Index Explanation Index Explanation Lane departure warning video KAFAS control unit with camera with LVDS connection... -
Page 12: Functional Principle
Warnings are given, therefore, only at speeds of over 44 mph. The driver activates the system using the lane departure warning button in the BEFAS driver assistance control panel. F01/F02 Lane departure warning Driver assistance systems control panel in the F01/ F02 F01 KAFAS... - Page 13 The activated system is ready as soon as lane markings are detected by the control unit and the vehicle is travelling faster than 44 mph. The ready state of the system is represented by additional arrow symbols in the display. Lane departure warning ready F01 KAFAS...
- Page 14 The lane departure warning senses an intentional change of lane made by the driver from the activation of the turn signal. In this case there is no warning when the vehicle is driven over the lane marking. Warning the driver by vibrating the steering wheel in the F01/F02 Index Explanation...
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Page 15: Lane Detection
131ft. to the front of the vehicle and up to approximately 5m/ 16.4 ft to the right and left. The image data is sent to the KAFAS control unit along an LVDS data line for analysis. Using image processing technology, the control unit scans the images recorded by the video camera for lane and roadway markings. -
Page 16: Roadway Marking
When the ignition is switched on, the lane departure warning system always reverts to the state that was active when the vehicle was last switched off. Provided lanes can be detected, the lane departure warning is “primed” (ready) above a speed of 40 mph. Lane departure warning displays System Active System Ready F01 KAFAS... - Page 17 44mph. In vehicles equipped with a combination of the lane departure warning and Active Cruise Control with Stop & Go, the displays of each of these systems are also combined. Displays of the lane departure warning with ACC F01 KAFAS...
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Page 18: Displays Of The Lane Departure Warning/Active Cruise Control With Stop & Go
Lane departure warning ready Speed Limit Information (Not for US) Display in the head-up display of the F01/F02 The driver can activate or deactivate the display for the lane departure warning in the head-up display from the Central Information Display using the controller. -
Page 19: Warning
Using the vehicle’s steering angle and road speed, the system calculates the time (t) remaining before the vehicle would cross the lane marking. The warning is output in time before the vehicle crosses the marking. Lane departure warning vibration actuator F01 KAFAS... - Page 20 F01/F02 Lane departure warning A warning is output only once on approach to a roadway marking. The warning lasts a maximum of 2.5s. No more warnings are output if the vehicle then continues to drive along the lane marking. A new warning can only be issued if the vehicle has been steered back into the lane or the vehicle has completed a change of lane.
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Page 21: Signal Path For Controlling The Vibration Actuator
Signal path for controlling the vibration actuator Control of the vibration actuator in the steering wheel is initiated by the KAFAS control unit in interaction with the ZGM, ICM and SZL. The ICM is always included in the control of the vibration actuator so that, in vehicles equipped with both the optional lane change warning and the lane departure warning, the driver is able to distinguish between the warnings of these similar systems. -
Page 22: High-Beam Assistant
High-beams can still be switched on and off manually as usual. The driver always has the capability, and indeed the obligation, to override the system whenever the situation requires it. High-beam assistant display and button Index Explanation Steering column stalk High-beam assistant button Display when high-beam assistant activated Display when high-beam headlights on F01 KAFAS... - Page 23 In combination with the lane departure warning, the high-beam assistant function shares the same video camera and the same KAFAS control unit. High-beam assistant with the video camera of the lane departure warning and the KAFAS con- trol unit in the F01/F02...
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Page 24: Operation And Indication
In order for the driver to be able to activate and use the high-beam assistant, the light switch must first be set to Automatic or light switch position II. In the F01/F02, the high-beam assistant has its own activation button in the turn signal/ high-beam stalk on the steering column. - Page 25 Turn signal/high-beam stalk on the steering column in the F01/F02 High-beam assistant on/off button Turn signal/high-beam stalk on the steering column in the F01/F02 An active system is indicated by the following symbol in the instrument cluster. Display when high-beam assistant...
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Page 26: Detection Of Light In The Field Of View Of The Video Camera
5° up and down. When active, these special video cameras capture dots of light and, in the process, are able to distinguish between various parameters, e.g. light color and light intensity. Field of view of the video camera in the F01/F02 Index Explanation... - Page 27 Horizontal/vertical field of view of the video camera in the F01/F02 F01 KAFAS...
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Page 28: Evaluation Of Image Data
If the vehicle is in an environment with adequate light, the high-beam headlights do not switch on. The KAFAS control unit sends a switch-off recommendation to the footwell module. These conditions could be: •... -
Page 29: Control Of The High-Beam Headlights
Control of the High-beam Headlights At the request of the FLA (KAFAS) control unit, the actual switching on and off of the high-beam headlights is always carried out by the footwell module, which is responsible for all of the exterior lighting. -
Page 30: Service Information
The high beam assistant was introduced for the first time in the E60, E61, E63 LCI, E64 LCI BMW models from 2007 Model Year. The high-beam assistant is not available separately for the F01/F02 and is part of the ZDA Driver Assistance Package option. -
Page 31: Check Control Indicator
Sensor field covered. Manual activation not active and deactivation of high-beam. High-beam assistant High-beam assistant defective. Have the system checked by the nearest BMW Service. defective High-beam assistant sensitivity adjusted for Sensitivity adjusted automatic high-beam headlights. Possible risk of dazzling oncoming vehicles. F01 KAFAS...
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