Device for keeping optical elements clean, in particular covers for sensors or cameras, in motor vehicles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 20, 2005
Grant Date -
Aug 21, 2003
app pub date -
Mar 8, 2001
filing date -
Mar 11, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a device for keeping optical elements clean in motor vehicles, especially sensor or camera covers. This is done according to the present invention by applying a directed stream of gas, for example a stream of air, to the transparent cover in such a way that when the cover moves relative to the surroundings no ambient atmosphere, e.g., no ambient air, reaches the surface of the cover. According to one embodiment, by using a nozzle pressurized air is blown in, producing a transverse air stream. It is also possible, using a cover, to form a buffer space in front of the cover in addition to the transverse air stream. In a further refinement, a cleaning nozzle and a heater for the cover can be provided, in order to also be able to perform cleaning when soiling has occurred during stationary operation and to remove icing at low temperatures. To this end the cleaning fluid and/or the supplied air may also be pre-heated.
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