Device for operating a windshield wiper
First Claim
1. A device for operating a windshield wiper with an automatic wiper control, comprising an input stage for detecting the switching on of the wiper control, a sensor unit that detects the wetting condition of a windshield, an evaluation unit that amplifies and evaluates a sensor signal, an actuation unit for a wiper motor, and a control stage which triggers at least one initial wiping action when responding to an activation signal emitted by the input stage during the switching-on and, following the initial wiping action, causes the wiping operation to take place on the basis of the wetting condition detected by the sensor unit, the adjustment of the amplification in the evaluation unit taking place when the initial wiping action is triggered, and the initially adjusted amplification level, independent of the wetting condition of the windsheild, falling just short of the overamplification limit of an analog/digital converter that receives the amplified signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for operating a windshield wiper with an automatic wiper control. The wiping operation is optimally adapted to the wetting conditions of a windshield as soon as the automatic wiper control is turned on. This is achieved by a control stage which, during the switching on, triggers at least one initial wiping action when responding to an activation signal emitted by an input stage. Following the initial wiping action, the wiping operation takes place on the basis of the wetting conditions detected by the sensor unit.
23 Citations
5 Claims
- 1. A device for operating a windshield wiper with an automatic wiper control, comprising an input stage for detecting the switching on of the wiper control, a sensor unit that detects the wetting condition of a windshield, an evaluation unit that amplifies and evaluates a sensor signal, an actuation unit for a wiper motor, and a control stage which triggers at least one initial wiping action when responding to an activation signal emitted by the input stage during the switching-on and, following the initial wiping action, causes the wiping operation to take place on the basis of the wetting condition detected by the sensor unit, the adjustment of the amplification in the evaluation unit taking place when the initial wiping action is triggered, and the initially adjusted amplification level, independent of the wetting condition of the windsheild, falling just short of the overamplification limit of an analog/digital converter that receives the amplified signal.
-
5. A device for operating a windshield wiper with an automatic wiper control, comprising:
-
(a) an input stage which receives a switching-on signal and puts out an activation signal; (b) a control stage connected to receive said activation signal, said control stage producing a first control signal; (c) an evaluation unit connected to receive said activation signal, said evaluation unit producing a second control signal; (d) a sensor unit connected to receive said activation signal as well as a signal reacting to a wetting event, said sensor unit producing a sensor signal, said evaluation unit being connected to receive said sensor signal; (e) an actuation unit connected to receive said first and second control signals, said actuation unit putting out an output signal to actuate a wiper motor.
-
Specification
-
- Resources
-
Current AssigneeRobert Bosch GmbH
-
Original AssigneeRobert Bosch GmbH
-
InventorsBlitzke, Henry, Pientka, Rainer, Buerkle, Joerg
-
Primary Examiner(s)IP, SHIK LUEN PAUL
-
Application NumberUS08/784,136Time in Patent Office1,063 DaysField of Search318/440-483, 318/DIG. 2, 250/214 AC, 250/339.1, 15/250.13, 15/250.17, 15/DIG. 15, 15/250 CUS Class Current318/483CPC Class CodesB60S 1/0818 including control systems r...Y10S 318/02 Windshield wiper controls
