Speed control for a window wiper system

Details Speed control for a window wiper system Speed control for a window wiper system

B - Operations, Transporting

60

S

342/29.31

B60S 1/08 (2006.01)

Patent

CA 1261948

Abstract Speed Control For Window Wiper System A window wiper control system provides accurate regulation and/or profiling of wiper speed. A desired interval corresponding with the preselected speed or speed profile is stored; a reference signal is provided to indicate a reference position of the wiper and is used to measure the actual interval of a wiper stroke or cycle. The actual interval is compared with the desired interval and an appropriate adjustment is made in a pulse-width modulation signal for effecting a desired speed and interval, The pulse-width modulation signal preferably has a relatively-low repetition rate. The wiper speed may be profiled to include acceleration and deceleration, and the intervals of acceleration and deceleration may be lengthened substantially to provide an apparent dwell.

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