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Process and system for controlling a windshield wiper, particularly for a motor vehicle

  • US 5,684,464 A
  • Filed: 05/12/1995
  • Issued: 11/04/1997
  • Est. Priority Date: 05/18/1994
  • Status: Expired due to Fees
First Claim
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1. A method for controlling a windshield wiper, suitable for use on a motor vehicle, the method employing a sensor which recognizes the intensity of rain on a windshield and gives off a signal, the signal enabling the windshield wiper to be automatically controlled as function of the intensity of the rain, and wherein a variation in the signal of the sensor is manifested as random signals produced by the presence of continuous movements of drops of water and serves as measure for the intensity of the rain;

  • the method comprising steps of;

    in a sequence of sudden changes in the sensor signal, observing time elapsed between one of said sudden changes in the sensor signal and a later sudden change thereof exceeding a given value; and

    controlling the windshield wiper as a function of at least an earlier one of said sudden changes in the sensor signal which precedes said one sudden change during the elapsed time between the occurrence of the sudden changes.

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