GF82.10-P-2007-01R Xenon Headlamp, Function

GF82.10-P-2007-01R Xenon Headlamp, Function

Xenon illumination engineering, function
When the low beam lamp function is switched on, the xenon headlamp control unit (E1n1, E2n1) activates the xenon headlamp control unit and ignition module (E1n2, E2n2) via the control voltage within a few milliseconds.

A high-voltage surge from the ignition device ignites the xenon lamps, and in doing so an electric arc is formed between the electrodes. When an arc of sufficient stability is detected, the control electronics of the xenon lamp control unit (E1n1, E2n1) switches over to power-limiting mode.

A voltage converter in the xenon headlamp control unit (E1n1, E2n1) generates the voltage required to ensure reliable functioning of the xenon bulb.

Xenon lamp technology means that the startup characteristic is delayed. Once switched on full brightness is reached after a brief period.

Vehicles with code (614) Bi-xenon headlamp unit
With bi-xenon headlamps, the light generated travels directly through the lens optics. In order to make the extremely bright light more acceptable to other road users, the lens aperture area with its dotted characteristic is optically enlarged. This is possible on account of the specially shaped surfaces surrounding the lens. For the left low beam (E1e2) and the right low beam (E2e2), the lower half of the light flux is concealed by a shield. This prevents oncoming traffic from being dazzled.

When switching to the high beam function, for the left high beam (E1e1) and right high beam (E2e1), the shield of the left low beam (E1e2) and the right low beam (E2e2), respectively, is folded down so that the entire light flux of the xenon light is additionally available.

The covering is controlled electro-mechanically via the left high beam solenoid (E1l1) in the left front lamp unit (E1) and the right high beam solenoid (E2l1) in the right front lamp unit (E2).

Vehicles without code (614) Bi-xenon headlamp unitThe light generated in xenon headlamps does not travel through a lens optics as in bi-xenon headlamps, instead it is reflected. In this case, the entire light flux is always available, but to the low-beam function only. For the high-beam function, only the left high beam (E1e1) and right high beam (E2e1) are actuated.