Electricity: motive power systems – Periodic – repetitious or successive operations control of... – Variable periods or intervals between controlling operations
Patent
1986-02-21
1987-05-05
Shoop, Jr., William M.
Electricity: motive power systems
Periodic, repetitious or successive operations control of...
Variable periods or intervals between controlling operations
318282, 318285, 318293, 318443, 15250C, 1525017, H02P 104, B60S 108
Patent
active
046635750
ABSTRACT:
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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"Development of Continuous Electronic Speed Controllers" by Miyahara et al., SAE Technical Paper Series, Paper No. 851635, Passenger Car Meeting, Dearborn, Michigan. Sep. 23-26, 1985.
"Microprocessor Controlled Windscreen Wiper Operation" by Gaffney et al., The Institute of Mechanical Engineers, Paper No. C169/81, Third International Conference on Automotive Electronics, Oct. 20-23, 1983.
Juzswik David L.
Lahiff John E.
Ro Bentsu
Schneeberger Stephen A.
Shoop Jr. William M.
United Technologies Automotive Inc.
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