Process and system for controlling a windshield wiper, particula

Details Process and system for controlling a windshield wiper, particula Process and system for controlling a windshield wiper, particula

1995-05-12

1997-11-04

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

318444, 318483, 318DIG2, 340601, 340438, 340439, G08B 2100, H02P 528

Patent

active

056844646

ABSTRACT:
A process and a system for controlling a windshield wiper, in particular on a motor vehicle, employs a sensor which recognizes the intensity of the rain. The sensor gives off a signal whereby the windshield wiper is automatically controlled as a function of the intensity of the rain. A variation in the signal of the sensor is effected by random signals produced by the continuous movements of drops of water, and serves as measure for the intensity of the rain. In order to assure an optimal and reliable control of the windshield wiper as a function of the intensity of the rain, there is a monitoring of the time between a first sudden change of the signal and a second sudden change. When the time exceeds a given value, the windshield wiper is controlled as a function of at least an earlier one of the sudden changes in the sensor signal which precedes the aforementioned first sudden change.

REFERENCES:
patent: 4740735 (1988-04-01), Hayashi
patent: 5140233 (1992-08-01), Wallrafen
patent: 5203207 (1993-04-01), Sukiyama
patent: 5252898 (1993-10-01), Nolting
patent: 5276389 (1994-01-01), Levers
patent: 5319293 (1994-06-01), Levers
patent: 5412296 (1995-05-01), Chien et al.
patent: 5436541 (1995-07-01), Mangler
patent: 5453670 (1995-09-01), Schaefer

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