Daimler Chrysler Ag

Roland Mauser

Josef Berger

Alf Blessing

Rainer M&auml;ckel

Thomas Binder

Fritz Schmidt

Rainer Maeckel

Manfred Stege

Rainer Mackel

A control device for the drive motor of a windscreen wiper device in a vehicle, especially a motor vehicle, comprising a control switch which can be activated by means of a manually actuated wiper switch and which automatically controls the drive motor in a switching stage of said wiper switch according to a rain sensor signal corresponding to a characteristic curve. The operating data for the drive motor varies according to the external effects of lighting, temperature, or speed parameters.

Control device for a windscreen wiper device

An arrangement and method for protecting a multiple voltage supply system against voltage arc-over between the different voltage planes. For this, the voltage in the low-voltage plane of the supply system is clamped to the low-voltage value with a voltage limiter until a battery disconnect switch in the high-voltage plane of the supply system is opened and the generator output voltage in the high-voltage plane is adjusted back to the voltage value of the low-voltage plane. As a result, the high-voltage plane of the supply system is disconnected from the high-voltage sources. Consequently, the voltage in the low-voltage plane is prevented from increasing even in case of a short-circuit between both voltage planes of the supply system and the consumers in the low-voltage plane can continue to be operated safely.

Arrangement and method for protecting multiple voltage supply systems against voltage arc-over between different voltage planes and against pole reversal from the outside

A control device for the driving motor ( ) of a windshield system. A manually operated wiper switch ( ) is provided for selecting an operating mode, in at least one of which the wiper speed is automatically controlled by a characteristic curve and the signal from a rain sensor ( ). To modify the characteristic curve based on the use of the system by an individual driver, the manually operated wiper switch ( ) conveys control commands to an adaptation algorithm control in a control circuit ( ). The control circuit ( ), in response to switching out of the automatic mode, generates a new characteristic curve at a modified operating point, with the new characteristic curve incorporating the modified operating point. When the switching stage which is dependent on the quantity of rain is again activated, the diving motor ( ) is controlled according to the new characteristic curve.

Control device for a windscreen wiper system

A control device operates a window wiper in a motor vehicle, and includes a switching device for the selection of several wiping functions, a sensor device for determining a wetting degree of a window, and an electronic analyzing system. The window wiper is capable of being operated, depending on the wiping function selected by the user, in a continuous wiping operation and/or in a single wiping operation. The electronic analyzing system, during a first wiping function, analyzes the determined wetting degree of the window and, depending on the determined wetting degree of the window, in a continuous wiping operation, sets a wiping frequency and/or, in a single wiping operation, activates a wiping cycle for the window wiper. The electronic analyzing system sets the wiping frequency of the window wiper in the continuous wiping operation during a second wiping function within a second wiping frequency band, and during a third wiping function, within a third wiping frequency band, and during the first wiping function, within a first wiping frequency band, depending on the analysis of the wetting degree of the window, an actual wiping frequency being set which is as optimal as possible. If, during the switching between the wiping functions, a change of the wiping frequency band is required, 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.

Growing community of inventors

Ludwigsburg, Germany

Roland Mauser