Method for controlling and adjusting a motor-driven adjusting device
AssigneeBrose Fahrzeugteile GmbH & Co. KG, Coburg
InventorsPeter Heinrich, Mike Eichhorn
Life of this patent
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Abstract
The invention relates to a method for controlling and adjusting a motor-driven adjusting device, especially a window lifter, a seat adjusting device or a sliding roof of a motor vehicle, comprising an anti-jamming protection. The motor drive is switched off or blocked at a value below a predetermined load limit when said predetermined load limit is exceeded. The aim of the invention is to provide a method with which the adjusting device is subjected to as little loads as possible under all operating conditions. To this end, state variables of the motor drive are continuously detected and the load actually generated by the motor drive is determined from said state variables on the basis of a mathematical model of the drive.
Claims15
Method for controlling and regulating a motor driven adjusting device, more particularly a window lifter, seat adjuster or a sun-roof, of a motor vehicle with an anti-jamming protection, wherein input variables of the motorised drive are continuously detected and the actual load of the adjusting device or motorised drive is determined through systems of equations which were set up using a mathematical model of the complete adjusting device including the drive, and on exceeding a predetermined load limit the motorised drive is switched off or regulated to a value below the load limit, characterised in that
- the continuously detected input variables are converted into individual force components (Fmot, FBeschl, Fres, Fs+h) which contribute to increasing or reducing the overall load (FEinkl) of the adjusting device or individual components of the adjusting device and which are entered with a positive sign into the calculation of the actual total load (FEinkl) of the adjusting device or drive, which depends on whether the relevant force component (Fmot, FBeschl, Fres, Fs+h) assists the adjusting movement of the adjusting device or drive or counteracts the adjusting movement of the adjusting device or drive.
Method according to one of the preceding claims characterised in that at least a part of the parameters of the mathematical model is determined on the basis of the input variables actually detected or the time-dependent paths of the input variables.
Method according to one of the preceding claims, characterised in that at least a part of the parameters of the mathematical model is established on the basis of empirically determined data.
Method according to one of the preceding claims characterised in that empirically determined data or theoretical load calculations regarding the mechanical components of the drive are used when establishing the load limit.
Method according to one of the preceding claims characterised in that the load limit is determined in dependence on the temperature of at least one part of the adjusting device.
Method according to one of the preceding claims characterised in that when establishing the load limit the mean variation of the actual load generated by the motorised drive and calculated through the mathematical model is taken into account reducing the amount.
Method according to one of the preceding claims characterised in that the mathematical model has a dynamic part which takes into account the influences during acceleration and braking of the drive.
Method according to one of the preceding claims characterised in that the mathematical model has a proportion which represents the actual characteristic field of the drive used.
Dependencies are inferred from the claim text.