Patent ID: 6121741
Filing Date: 2000-09-19
Classification: B60S

Abstract:
A control device for operating a window wiper in a motor vehicle, said control device having a switching device for selecting several wiping functions, a sensor device for sensing a wetting degree of a window, and an electronic analyzing system, said window wiper being capable of being operated, depending on the selected wiping function, in at least one of a continuous wiping operation and a single wiping operation, wherein said electronic analyzing system, during a first wiping function, analyzes the sensed wetting degree of the window and, depending on the sensed wetting degree, sets a wiping frequency in a continuous wiping operation and/or activates a wiping cycle for the window wiper in a single wiping operating, further wherein said electronic analyzing system sets the wiping frequency of the window wiper in the continuous wiping operation during the first wiping function within a first wiping frequency band, during a second wiping function, within a second wiping frequency band, and during a third wiping function, within a third wiping frequency band, andwherein depending on an analysis of the wetting degree of the window, an actual wiping frequency is set as low as possible, and if, during a switching between the several wiping functions, a change of the wiping frequency band is required, then the actual wiping frequency, during a change from the second wiping frequency band to the third wiping frequency band is increased by a defined number ""n"" wiping cycles per minute or, during a change from the third wiping frequency band to the second wiping frequency band is reduced by a defined number ""m"" wiping cycles per minute.