1 / 9

Electric headlight starter (ignition device)

Dynamic headlight range control. The start-up characterisation has 4 phases 1. Ignition through high voltage impulse ( a few ms, about 12 to 20 kV ). 2. Starting light ( about 15 % ): Limitation of lamp's current and output to about 2.6 A or 75 Watt 3. Light changes colour

Download Presentation

Electric headlight starter (ignition device)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Dynamic headlight range control The start-up characterisation has 4 phases 1. Ignition through high voltage impulse ( a few ms, about 12 to 20 kV ). 2. Starting light ( about 15 % ): Limitation of lamp's current and output to about 2.6 A or 75 Watt 3. Light changes colour 4. Continuous operation ( about 35 Watt ): The electric arc attains its specification which is stabilised by the headlight starter (ballast). (Alternating current with a frequency of 400 Hz) Electric headlight starter (ignition device) * The combustion chamber is a pea-sized glass cylinder filled with xenon gas and metallic halide salts. ( pressure about 100 bar ) * Electric arc temperature about 700° C * 250 % more light efficient * 5 times the life span * Can be renewed only by trained personnel 12 kV 2.6 A/ 75W  35 W Converter Regulation range

  2. M Dynamic headlight range control Functional diagram Headlight range control Terminal 15 Terminal 31 Terminal 65b V 48 left    G 78 6 2 17 10 9 3 5 2 4 19 15 3 4 20 J 431 1 7 8 6 6 M Headlight range control CU on left inluggage compartment 16 2 3 13 14 11 12 4 G 76 V 49 right V signal K wire Failure warning light in estate ( Audi only ) CAN ( to be used later )

  3. Angle of rotation 70° Dynamic headlight range control Contactless attitude sender operating on Hall principle The senders are identical to those of the static headlight range control ( see also Trainer Information Audi A6 ) Vehicle attitude sender G 76 / G 78 Design N Ring magnet N Stator S Hall sender S High magnetic field density Low magnetic field density 4.5 2.5 0.5 0 V

  4. Dynamic headlight range control Address word 55 Coding 00007 for front wheel drive 00008 for four-wheel drive Final control diagnosis Lower/raise headlights Measured value blockChannel 001 1 = Voltage supply terminal 15 ( in Volt ) 2 = Light switch terminal 56b (light on/off ) 3 = Speed in km per hour 4 = Vehicle acceleration in m/s² Channel 002 1 = Front attitude sender in Volt ( 1.57 to 3.45 Volt ) 2 = Rear attitude sender in Volt ( 1.57 to 4.5 Volt ) 3 = Step motor actuation in % ( indicates what percent of the spindle is advanced from the zero position ) 4 = Time constant in seconds ( time required for 63 % of the adjustment to occur ) Basic setting Channel 01 Regulating mode is switched off Channel 02 Control unit learns the adjusted position as regulation position Headlight range control self-diagnosis

  5. Vehicle self-diagnosis 08 - Read measured value block Read measured value block Display group Basic setting 55 Headlight range control 4B0 907 357C Dynamic HRC D03 7 Coding 7 Dealership number 1317 Voltage supply terminal 15 12.1 V Light switch off/on 0 / 1 Vehicle speed 0 km/h Vehicle acceleration in m/s2 0.00- 7.00 m/s2 1 Coding = 7 Front wheel drive 8 Four-wheel drive

  6. Vehicle self-diagnosis 08 - Read measured value block Read measured value block Display group Basic setting 55 Headlight range control 4B0 907 357C Dynamic HRC D03 7 Coding 7 Dealership number 1317 Front vehicle attitude sender (1.57 to 3.45 V ) 3.1 V 2.3 V Rear vehicle attitude sender (1.57 to 4.50 V ) Step motor actuation in % ( 0 to 100% ) * 74 % Time constant in seconds ( 0 to 2 seconds ) ** 0.03 s 2 * indicates what percent of the spindle is advanced from zero postion of step motor ** indicates time required for headlights to attain 63% of their adjustment

  7. Vehicle self-diagnosis 03 - Final control diagnosis Read measured value block Display group Basic setting 55 Headlight range control 4B0 907 357C Dynamic HRC D03 7 Coding 7 Dealership number 1317 12.1 V For basic setting, leave lights on and engine running 0 / 1 0 km/h 0.00- 7.00 m/s2 1 Adjusting headlights

  8. Vehicle self-diagnosis 03 - Final control diagnosis Read measured value block Display group Basic setting 55 Headlight range control 4B0 907 357C Dynamic HRC D03 7 Coding 7 Dealership number 1317 3.1 V For basic setting, leave lights on and engine running 2.3 V 74 % 0.03 s 2 Regulation position being learnt

  9. Vehicle self-diagnosis 03 - Final control diagnosis Read measured value block Display group Basic setting 55 Headlight range control 4B0 907 357C Dynamic HRC D03 7 Coding 7 Dealership number 1317 Headlights will be lowered Headlights will be raised Signal wire to combi-instrument 3

More Related