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

1996-12-03

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

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

Patent

active

055812406

ABSTRACT:
A process and a system for controlling a windshield wiper, in particular on a motor vehicle, in which a rain sensor is located on the glass to be wiped and within the region of the windshield wiper. The sensor outputs a sensor signal as a function of the amount of moisture. The signal is detected periodically and, when a reference degree of moisture is reached during a measurement cycle, the system produces a triggering signal and the windshield wiper is activated. The wiping process takes place even when the windshield wiper is wetted with moisture only to a slight but nevertheless disturbing extent. In the process, when a degree of moisture below a reference degree of moisture is present at the end of the measurement cycle, this degree of moisture is included additively to the degree of moisture of a further measurement cycle. Thereupon, the degree of moisture of the further measurement cycle is compared with the reference degree of moisture.

REFERENCES:
patent: 4740735 (1988-04-01), Hayashi
patent: 5140233 (1992-08-01), Wallrafen
patent: 5216341 (1993-06-01), Nomura et al.
patent: 5306992 (1994-04-01), Droge
patent: 5436541 (1995-07-01), Mangler et al.
patent: 5453670 (1995-09-01), Schaefer

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