Adjusting Device and Control Device of a Vehicle

• US 20080284362A1
• Filed: 10/21/2006
• Published: 11/20/2008
• Est. Priority Date: 11/04/2005
• Status: Active Grant

• Current Assignee: Brose Fahrzeugteile GmbH & Co. KG
• Original Assignee: Brose Fahrzeugteile GmbH & Company KG Coburg
• Inventors: Buhlheller, Jurgen, Rosch, Thomas, Schussler, Markus
• Granted Patent: US 8,084,978 B2
• Time in Patent Office: Days
• US Class Current: 318/434
• CPC Class Codes: B60N 2/0244 with logic circuits
• CPC Class Codes: B60N 2/0272 using sensors or detectors for detecting the position of seat parts
• CPC Class Codes: H02H 7/0851 for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal

Abstract

The invention relates to a control device of a vehicle seat for controlling a first drive and a second drive and for detecting jamming of a body part or of an object by means of an adjusting movement of an adjusting part, which can be adjusted in a first adjusting direction by means of the first drive and in a second adjusting direction by means of the second drive, of the vehicle seat, wherein the control device is configured to detect the jamming by means of a combined evaluation of at least one first force variable which is dependent on the adjusting movement and of a second force variable which is dependent on the adjusting movement.

Claims

1. An adjustment device in a motor vehicle, the adjustment device comprising

a first drive for adjusting an adjustment part, in a first adjustment direction,

a second drive for adjusting this adjustment part in a second adjustment direction,

an open-loop control apparatus for performing open-loop control of the first drive and of the second drive and for detecting trapping of a body part or of an object as a result of an adjustment movement of the adjustment part which can be adjusted by the first drive and by the second drive,

a first sensor means which is operatively connected to the first drive, and

a second sensor means which is operatively connected to the second drive,

wherein the open-loop control apparatus is connected to the first sensor means and to the second sensor means and is configured and designed

to determine, as a function of a first sensor signal of the first sensor means and a second sensor signal of the second sensor means, a first force variable, which is dependent on the adjustment movement, and a second force variable, which is dependent on the adjustment movement, and

to detect the trapping by means of a combined evaluation of at least the first force variable and the second force variable.

2. The adjustment device according to claim 1, in which a trapping force which acts with respect to the adjustment movement has a reaction both on the first drive and on the second drive.

5. The open-loop control apparatus according to any of claims 1-4, wherein the open-loop control apparatus has a first sensor means for detecting a first adjustment position and/or a first adjustment speed and/or a first drive current of the first drive and a second sensor means for detecting a second adjustment position and/or a second adjustment speed and/or a second drive current of the second drive.

8. The method according to claim 1, in which the first force variable and/or the second force variable are detected as a function of a first adjustment speed of the first drive and/or of a second adjustment speed of the second drive.

9. The method according to claim 1, in which the first force variable and/or the second force variable are detected as a function of a first value of a derivative of an adjustment speed of the first drive over time or distance and/or of a second value of a derivative of an adjustment speed of the second drive over time or distance.

10. The method according to claim 1, in which the first force variable and/or the second force variable are detected as a function of a first actuation signal of a first closed-loop controller of the first drive and/or of a second actuation signal of a second closed-loop controller of the second drive.

11. The method according to claim 1, in which the first force variable and/or the second force variable are detected as a function of a first current adjustment position of the first drive and/or a second current adjustment position of the second drive.

12. The method according to claim 1, in which the first drive and the second drive are adjusted simultaneously at least in certain sections.

13. The method as claimed in claim 12, in which, during the simultaneous adjustment, a change in the first force variable and in the second force variable which acts simultaneously on the first drive and on the second drive is detected as a case of trapping.

14. The method as claimed in claim 1, in which a trapping region is detected from a first current adjustment position of the first drive and/or a current adjustment position of the second drive and a ratio between the first force variable and the second force variable.

15. The method as claimed in claim 14, in which open-loop control is performed on the first drive and/or on the second drive as a function of the detected trapping region, in particular as a function of the hardness of the trapping region.

16. The adjustment device according to claim 1, wherein the adjustment part is a backrest.

17. The adjustment device according to claim 1, wherein the adjustment part is a window pane.

3. An open-loop control apparatus of an adjustment device for performing open-loop control of a first drive and of a second drive and for detecting trapping of a body part or of an object as a result of an adjustment movement of an adjustment part of the vehicle seat, which adjustment part can be adjusted in a first adjustment direction by the first drive and in a second adjustment direction by the second drive,

wherein the open-loop control apparatus is configured to detect the trapping by means of a combined evaluation of at least

a first force variable, which is dependent on the adjustment movement, and

a second force variable, which is dependent on the adjustment movement.

4. The open-loop control apparatus according to claim 3, wherein the open-loop control apparatus is configured

to perform closed-loop control of a drive torque and/or of a drive speed of the first drive with the first closed-loop controller and/or to perform closed-loop control of a drive torque and/or of a drive speed of the drive with a second closed-loop controller, and

to detect the first force variable and/or the second force variable as a function of a first actuation signal of a first closed-loop controller of the first drive and/or of a second actuation signal of a second closed-loop controller of the second drive.

6. A method for detecting trapping of a body part or of an object as a result of an adjustment movement of an adjustment part of an adjustment device of a motor vehicle, which adjustment part can be adjusted in a first adjustment direction by a first drive and in a second adjustment direction by a second drive,

in which method the trapping is detected by a combined evaluation of at least

a first force variable, which is dependent on the adjustment movement, and

a second force variable, which is dependent on the adjustment movement.

7. The method according to claim 6, in which the first force variable and/or the second force variable are detected as a function of a first drive torque of the first drive and/or of a second drive torque of the second drive.