Device for operating a windshield wiper
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United States of America Patent
Stats
-
Jan 16, 2001
Grant Date -
N/A
app pub date -
Dec 20, 1999
filing date -
Apr 4, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device (10) for operating a windshield wiper (12) is proposed, with a moisture sensor (22) for detecting the wetness of a window that in addition to detecting rain and droplets also detects fog and drizzle. The measured values (Us) of the moisture sensor (22) are allocated incremental values (Ink) by the control unit (16). The difference between two successive incremental values (Ink) is to be added, with a sign (+ or -), in the memory (28) to a sum (.SIGMA.) of differences formed previously in the same way, and when a threshold (S) is reached by the sum (.SIGMA.) stored in the memory (28), the control unit (16) trips a wiper operating mode.
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