Method for controlling and regulating 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.
Claims17
A method for controlling and regulating an adjusting device of a motor vehicle having an anti-jamming protection, the adjusting device being driven by a motorized drive, comprising:
- substantially continuously detecting input variables of the adjusting device;
- calculating a maximum permissible jamming force of the adjusting device as a function of the input variables;
- comparing a total force of the adjusting device to the maximum permissible jamming force;
- and
- if the total force exceeds the maximum permissible jamming force, switching off the motorized drive or regulating the motorized drive of the adjusting device;
- wherein the calculating of the maximum permissible jamming force of the adjusting device comprises:
- determining an individual force component as a function of corresponding input variables, each individual force component contributing to increasing or reducing the maximum possible jamming force of the adjusting device;
- and
- computing the maximum permissible jamming force of the adjusting device by a summation of the individual force components by entering each individual force component into a summation member with a positive sign or a negative sign depending on whether the individual force component assists or counteracts, respectively, the adjusting movement of the adjusting device.
A method for controlling and regulating an adjusting device of a motor vehicle having an anti jamming protection, the adjusting device being driven by a motorized drive, comprising:
- substantially continuously detecting input variables of the adjusting device;
- calculating a maximum permissible jamming force of the adjusting device or motorized drive as a function of the input variables;
- comparing a total force of the adjusting device to the maximum permissible jamming force;
- and
- if the total force exceeds the maximum permissible jamming force, switching off the motorized drive or regulating the motorized drive of the adjusting device;
- wherein the calculating of the maximum permissible jamming force of the adjusting device comprises:
- determining a first force component as a first dynamic function of a rotational speed of an electric motor of said motorized drive, the first dynamic function representing a high pass filter taking into account a mechanical time constant and slide friction constant and determining a second force component as a static function of the rotational speed of said electric motor and a control signal of the electric motor;
- and
- computing the maximum permissible jamming force of the adjusting device by supplying the first force component to the summation member with a negative sign and the second force component to the summation member with a positive sign.
Dependencies are inferred from the claim text.