Method for performing closed-loop and/or open-loop control of a windshield wiper device, computer program product, control device and windshield wiper device

• US 9,018,877 B2
• Filed: 12/19/2012
• Issued: 04/28/2015
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Braun, Peter, Wegner, Norbert, Rapp, Juergen, May, Michael, Kuderer, Alexander
• Primary Examiner(s): Luo, David S
• Application Number:
  US13/719,540
• Publication Number:
  US 20130162189A1
• Time in Patent Office: 860 Days
• Field of Search: 318/434, 318/400.15, 318/400.01, 318/700
• US Class Current: 318/434
• CPC Class Codes: B60S 1/08 electrically driven conjoint control of windscreen wiper motor and liquid supply of windscreen washer B60S1/482; conjoint control of windscreen wiper motor and means for cleaning parts o parts other than windscreens or front windows B60S1/56, B60S1/58, B60S1/606

Abstract

A system for determining if a tire of a vehicle is improperly inflated. The system includes a radar, a wheel speed sensor, and a controller. The radar is configured to emit a signal to detect a reflection of the signal off of an object positioned perpendicular to the vehicle, and to output an indication of a speed of the vehicle. The wheel speed sensor is configured to sense a speed of a wheel of the vehicle. The controller is configured to receive the indication of the speed of the vehicle from the radar, to calculate a speed of the vehicle based on the sensed speed of the wheel, and to determine a tire of the wheel is improperly inflated when the speed of the vehicle calculated using the wheel speed sensor varies by more than a predetermined amount from the speed of the vehicle determined using the radar signal.

Claims

1. A method for operating a direct wiper drive having a motor (10) for a wiper device, comprising:

using a maximum load torque limit for normal operation;

determining at least a first characteristic variable for the plausibility of an exceptional case;

determining at least a second characteristic variable for the reliability of an exceptional case; and

ignoring, by a control device, the maximum load torque limit based on the first characteristic variable and the second characteristic variable.

2. The method according to claim 1, wherein the deactivation also comprises:

making available a further limiting load torque, wherein the further limiting load torque is greater than the limiting load torque.

3. The method according to claim 2, wherein the further limiting load torque is at least 30% greater than the limiting load torque.

4. The method according to claim 1, wherein the first characteristic variable comprises at least one characteristic variable which is an ambient temperature.

5. The method according to claim 4, wherein the characteristic variable of the ambient temperature has an upper limit for the plausibility of an exceptional case from −

10°

C. to 5°

C.

6. The method according to claim 1, wherein the first characteristic variable comprises at least one characteristic variable which is a blocking of the wiper device.

7. The method according to claim 1, wherein the second characteristic variable comprises at least one characteristic variable which from the group comprising:

a first number of already existing exceptional cases in a limited time period and a second number of already existing exceptional cases in the life cycle of at least one component of the wiper device.

8. The method according to claim 7, wherein the second characteristic variable first number has an upper limit for the reliability of an exceptional case from 5 to 15, and the second characteristic variable second number has an upper limit for the reliability of an exceptional case from 1000 to 60,000.

9. The method according to claim 7, wherein the second characteristic variable first number has an upper limit for the reliability of an exceptional case from 5 to 15.

10. The method according to claim 7, wherein the second characteristic second number has an upper limit for the reliability of an exceptional case from 1000 to 60,000.

11. The method according to claim 7, wherein the at least one component is the motor and/or a transmission of the wiper device.

12. The method according to claim 1, wherein the deactivation is limited to a predetermined exceptional time period.

13. The method according to claim 12, wherein the predetermined exceptional time period is limited to a period of 5 seconds or less.

14. A computer program product with program code which is stored on a non-transient machine-readable carrier, for carrying out the method according to claim 1, when the program is run on a computer or a control device of a vehicle.

15. Control device (35) for a direct wiper drive which is programmed for use in a method according to claim 1.

16. Windshield wiper device, comprising:

a control device for a direct wiper drive which is programmed for use in a method according to claim 1 and/or a computer program product with program code which is stored on a non-transient machine-readable carrier, for carrying out the method according to claim 1, when the program is run on a computer or a control device of a vehicle; and

a direct wiper drive having the motor, a wiper arm and a wiper blade.