LED headlights

24. ledna 2013 v 4:09 |  solar charger
Audi is also far ahead of the competition in the area of LED headlights. This high-end technology was introduced in the R8 in 2008, and today it is being implemented all the way to the A3 model series. With a color temperature of around 5,500 Kelvin, the LED light resembles daylight, and this reduces eye fatigue. The light-emitting diodes are maintenance-free, designed to last the life of the vehicle, and are highly efficient. The low-beam light, for example, only consumes around 40 watts, which is five percent less than xenon plus units.

In the new A3, nine high-performance LED chips in two free-form reflectors generate the low-beam light, while the high beam uses ten high-performance LEDs to emit light through an aluminum trim aperture. The static turning and all-weather lights are housed in a separate module; while the daytime running lights, parking and flasher lights are formed by a light guide that wraps around the upper and inner headlights as a narrow contour. The "wing" gives structure to the interior of the headlights.

LED headlights from Audi have not only proved themselves on the streets, but also in car racing. They made their debut in the R 15 TDI Le Mans sport protoype in 2010. In 2011, full-LED headlights were installed for the first time in the next generation race car, the R18 TDI. With their combined lighting power of over 200 watts, the LEDs generate a light pattern with a range of over one kilometer. Their equivalent luminous intensity of over 1,000 lux is five to seven times greater than headlights in production cars.

For many years now, LED technology has also been utilized in taillights - as standard or optional equipment. Unlike incandescent light sources, the light-emitting diodes reach full luminous intensity at lightning speed and without delay - when the driver brakes quickly, for example, the quick reacting brake lights give the driver of the vehicle behind additional valuable fractions of a second in reaction time.

Various adaptive light versions are available for the headlight systems. An electronic control module controls the swiveling xenon plus modules, or the LEDs, so that they always deliver the best possible lighting for city, highway and freeway driving. The driver can configure its mode of operation in the Audi drive select vehicle dynamics system.

One special component of adaptive light is smoothed dynamic headlight leveling. A video camera is used to detect vehicles ahead and oncoming vehicles; then the control module adapts the car's lighting to the distance to the other vehicles - via a soft transition that always maximizes the amount of illumination.

The all-weather light illuminates the area in front of the car significantly better than with fog lights. Depending on the specific system installed, this function might be implemented by activating the static turning lights in addition to other lights, which improves lateral illumination considerably. In addition, the xenon units (with xenon plus headlights) may be swiveled downward, and the LEDs (on LED headlights) that are responsible for the low-beam light might be switched off or dimmed. The interplay of these actions substantially reduces "self-glare" to the driver.

In the A6, A7 Sportback and A8 model series, an additional function is activated as soon as the optional night vision assistant detects a pedestrian. The system flashes three light pulses to the pedestrian with the high-beam light according to the specific situation. This clearly highlights the person and surroundings and warns the pedestrian. The system detects any oncoming traffic to avoid any potentially hazardous glare.

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