EP1593805B1 - Control unit and method for movement of a window pane of a convertible vehicle - Google Patents

Abstract

Control device for a motor vehicle window lifter has a sensor for determining the position of the window pane due to the movement of a window drive and a computer unit that serves both to determine the actual position of the window pane and the state or position of the vehicle roof. Independent claims are also included for the following; (1) digital storage medium for a computer program product. (2) vehicle window lifter with a control device.

Description

The invention relates to a method and a device for controlling a window regulator of a motor vehicle according to the preamble of claim 1 or 12. Such a method and such a device are for example from US 2004/027080 A1 , from the WO 02/074568 A or from the DE 42 05 286 A1 known.

From the DE 197 45 597 A1 In addition, a method for controlling and regulating the adjusting movement of a translationally adjustable component, in particular a window regulator in motor vehicles is known. In this method for controlling and regulating the adjustment movement of the translationally adjustable component, with an adjusting device, a drive device and a control and electronic control is effective anti-trap protection taking into account a sufficiently large adjustment in Schwergängigkeitsbereichen and acting on the vehicle body, caused by external influences Ensures forces. For this purpose, the drive means exerts an adjusting force equal to the sum of the adjustment of the Component is necessary force and an excess force, the sum is less than or equal to a permissible pinching force. The adjusting force or the excess force is additionally regulated as a function of forces acting on the vehicle body or parts thereof.

The solution ensures anti-pinch protection over the entire adjustment range, which meets the corresponding safety requirements. In addition, it is ensured that the adjusting force is sufficiently large, even in the areas of stiffness, and that an adjusting device adjusts a translationally displaceable component taking into account the external influences acting on the vehicle body in accordance with the operator's material. External influences are here understood to mean the forces acting on the vehicle body or acceleration forces which are not directly caused by the adjusting device or by a drive device, but occur, for example, because of the poor condition of the driving route (driving through a pothole) or when closing a vehicle door.

The regulation of the adjustment force or the excess force is preferably carried out as a function of the direction of movement of the translationally adjustable component and of the predominant direction of action occurring acceleration forces such that the adjusting force is always less than or equal to the permissible pinching force. If, for example, an acceleration force acts on the vehicle body, which supports the closing movement of a translationally adjustable component, the threshold value is preferably reduced. In the case of occurrence of the closing movement opposing acceleration force, the threshold is increased. In this way, the adjusting force is always sufficiently large, so that the closing movement continues safely and an anti-trap protection is ensured.

It is further provided that upon the occurrence of acceleration forces acting on the vehicle body within a predetermined period of time, a regulation of the adjustment force or the excess force is interrupted and a threshold value is predetermined such that the adjustment force is always less than or equal to the permissible pinching force. The time span is for example 100 ms. This embodiment takes into account that with constantly changing acceleration forces acting on the vehicle body, the threshold value is not constantly changed within a short period of time, which could lead to an impairment of the movement of the translationally adjustable component. By the Presetting a fixed threshold, which is always less than or equal to the permissible pinching force, both a safe movement of the translationally adjustable component and a anti-trap protection is ensured.

The acceleration forces acting on the vehicle body are preferably detected by a sensor, for example by a digital signal providing sensor. Digital signals can be processed easily in a control electronics. To set the control can be evaluated by the control and electronic control single or multiple, temporally one behind the other signals of the sensor. The repeated evaluation of the signals of the sensor makes it possible to reliably identify a simultaneous occurrence of the acceleration forces caused by external influences and the forces caused by a trapping case.

From the DE 195 17 958 a motor drive device for a motor vehicle is known. In the motor driving apparatus for a power window, the rotation of the motor is stopped immediately when the movement of the window with an engine turned obstructs an obstacle. The motor drive device serves to open and close the movable part (window) and can be selectively operated and stopped.

An electric current measuring device measures the magnitude of the current flowing through the motor in a start-up compensation time, a current magnitude change detecting device detects an amperage increment from the detected current at every constant time, and a motor controller supplies a first or a second control signal to the motor drive device the first signal depending on the polarity of the Stromstrkeninkrements the engine operation continues and with the second signal, the engine is stopped immediately.

Two selector switches indicate the direction of rotation of the motor, a pair of key switches for the respective motor directions and two self-holding circuits for the two directions of rotation of the motor allow rotation of the motor upon actuation of one of the key switches.

Object of the present invention is to improve a method and an apparatus of the type mentioned. This object is achieved by a method having the features of claim 1 and by a control device having the features of claim 10. Advantageous developments of the invention are specified in the subclaims.

Accordingly, a control device with a sensor for determining a dependent of a drive movement of a drive of the window regulator position of a window pane of the window regulator is provided. The position signals generated by the sensor, for example a displacement sensor or angular momentum sensor, relate to the position of the windowpane. For example, these counts are preferably proportional to a counted position value and position. For example, position signals are obtained from a ripple of a drive current of a mechanically commutated electric motor. The sensor signals can be evaluated by the control device.

For this purpose, the control device on an analog, but preferably digital arithmetic unit, which has a function for the combined evaluation of the current position of the window and a state, namely the position and the type of a hood of the motor vehicle. Here, the state of the hood is a current top position of a particular motor-driven hood and the type of hood, in particular a hard roof (hardtop) or soft roof (soft top). In the context of the invention, the type of hood combined with the top position forms the state of the hood. For example, possible top positions are "top completely closed", "top fully open", n top partly closed "or top closed and unlocked". The evaluation can be done for example by a corresponding logic circuit as a computing unit, by a hardwired program logic (ROM) as the arithmetic unit or by a programmable arithmetic unit.

In this case, the invention comprises the control of the window lifter by determining the position of a window pane of the window lifter and controlling a drive of the window lifter in dependence on the determined position. In this case, the current position as well as the position and the type of a hood of the motor vehicle combined are evaluated for control.

For the function of the combined evaluation, the current position can be evaluated depending on the position and the type of the hood. Consequently, the arithmetic unit has a function of the position and the type of the top depending evaluation of the current position. For evaluation, the Information about the current position, for example, depending on the position and the type of the top different weights or assigned. The result of the evaluation allows the control of different modes of operation, such as normalization or non-normalization on a particular subsequent blocking of the adjustment and / or the activation or deactivation of a pinch protection algorithm and / or the change of parameters of the anti-jamming algorithm.

In an advantageous embodiment, the control device has an interface, in particular in the execution of a bus, such as a CAN bus or LIN bus of the motor vehicle. A signal characterizing the position and the type of the hood is transmitted via this interface to the control device designed for the control. The arithmetic unit is set up to evaluate this transmitted signal.

Also, the position and type of the hood can be determined by a plausibility check of the current position of the window. The prerequisite for this is that the possibility of approaching certain adjustment positions of the window pane depends on the position and type of the hood. If, for example, the adjustment path of the window pane for an open top is made possible up to the upper mechanical stop of the window lifter, while in the case of the closed top the adjustment path is limited by blocking the adjustment movement of the window pane on the top, the information can be obtained, for example by means of the plausibility check the hood is at least partially open when the window pane is moved beyond the expected blockage on the hood.

A development of this variant of the invention is that the position and the type of the top is determined by evaluating a blocking characteristic at the closed position of the window. If, for example, a characteristic for the retraction of the window pane edge in the seal of the hood speed profile is determined, the corresponding current top position is assigned to this event and performed, for example, a normalization. The blocking characteristic is also assigned to different hood types (hardtop, softtop) in order to adjust the control of the window regulator accordingly.

Due to errors in determining the position of the window pane, shifts are caused between the position determined by the control device and the actual position of the window pane. To be able to distinguish in the case of blocking the adjustment between a clamped body part and a block on the stop of the hood, a sufficiently accurate determination of the actual position of the window pane edge in relation to the stop of the hood is necessary. Errors in determining the position increase the risk of misjudgment of the actual position by the control device, which increases the risk of pinching a body part or a Fehlreversierens the window pane at the top of the hood. In order to reduce this risk, the position of the window pane is preferably repeatedly standardized with respect to the stop of the hood.

An advantageous development provides for normalization and / or denormalization of the determined position with respect to a disc-closing position depending on the position and the type of the top. The disc-closing position is in particular the stop of the hood or the mechanical stop of the window when the driver attached to the disc is moved to an upper stop of the window regulator rail. These two stops are usually offset locally in the direction of the adjustment. A standardization is preferably carried out at the stop of the hood, when this is in the closed state.

Preferably, a denormalization does not take place when a blockage is detected and the position of the hood is determined to be open. In this case, the previous normalization point of the previously determined position of the stop of the closed canopy is maintained and is advantageously used as an input value when the top is closed again and the window is moved to the blocking position at the stop of the hood.

The control device uses The information, which roof construction is installed to control the respective window regulator or multiple windows.

Advantageously, a closing movement of the window lifter is stopped for the control, if the pinching of an object or a body part is detected by the closing movement within a detection position range. In addition, after stopping the adjustment of the window pane can be reversed to release the jammed object or the clamped body part again.

Here, for the detection of the drive movement dependent characteristics are advantageously evaluated by means of a detection algorithm. One or more parameters of the detection algorithm are adapted depending on the type of hood. Such parameters are preferably dependent on the expected stiffness when retracting the window pane edge in the seal of the hood.

A further development of the invention provides that the parameter or parameters influence the sensitivity of the detection algorithm, in particular in such a way that the response sensitivity is changed as a function of the type of hood. The sensitivity is, for example, a constant threshold value or preferably a variable, position-dependent threshold value, which takes into account possible stiffnesses in at least one end region of the adjustment path. For example, a dependent of the position of the seal of the top of the curve of the threshold is provided so that the sensitivity is reduced with increasing retraction of the window edge in the seal of the hood.

Preferably, parameters associated with the type of top are read from a memory depending on the position and type of the top. Different positions or types of the hood are assigned different parameter values in the memory. Preferably, several of the parameters form a characteristic map for the sensitivity.

A further advantageous embodiment of the invention provides that at least one of the parameters forms a position shift (offset) for the sensitivity. For example, if an identical course of the sensitivity over the position distances in the adjustment of the window pane for different positions and types of

Ceiling specified, the sensitivity is adapted to the position and type significant position of the stop of the hood by means of the position shift. Preferably, the parameters are adapted to different sealing properties of different types of coverings occurring in cooperation with the window edge.

The arithmetic unit is preferably designed to learn the parameter or parameters as a function of one or more preceding adjustments. Learning allows adaptation to different temperatures or changes in the mechanical system over the useful life of the motor vehicle. Advantageously, the arithmetic unit is designed to learn the parameter or location-dependent speeds or location-dependent bindings to evaluate, in particular to average. As a result, it is possible to dynamically adapt the parameters, which in particular determine a reversing criterion. The reversing criterion is preferably a threshold, which is part of the said detection algorithm. Due to the dynamic adaptation of the parameters, the response sensitivity is adjusted by means of this reversing criterion.

In a digital storage medium, in particular a floppy disk or a memory chip, with electronically readable control signals, these can cooperate with a programmable arithmetic unit that the position of a window pane of the window regulator is determined and a drive of the window regulator is controlled in dependence on the determined position, wherein the Control the current position and a position and a type of hood of the motor vehicle combined to be evaluated.

In a computer program product with on a machine-readable carrier, in particular a semiconductor memory, stored program code for controlling a window regulator of a motor vehicle, the position of a window pane of the window is determined and a drive of the window regulator is controlled in dependence on the determined position, wherein the Control the current position and a position and a type of hood of the motor vehicle combined to be evaluated when the program runs on a computing unit.

In a rake program with a program code for controlling a window regulator of a motor vehicle, the position of a window pane of the window regulator is determined and a drive of the window regulator is in

Controlled depending on the determined position, wherein for controlling the current position and a position and a type of hood of the motor vehicle are combined evaluated when the program runs on a computing unit.

The invention also relates to a power window of a motor vehicle with a control device, the at least one sensor for determining a dependent of a drive movement of a drive of the window lifter position of a window of the window regulator, and a computing unit having a function for the combined evaluation of the current position of the window and a position and a type of hood of the motor vehicle comprises.

In the olgenden the invention is explained in more detail by embodiments using drawings. The stated advantages relate to the respective embodiment.

Figur 1

eine Steuerungsvorrichtung mit einer Steuerelektronik zur Steuerung eines Elektromotors eines Fensterhebers, und

Figur 2

einen schematischen Funktionsablauf für unterschiedliche Verdecktypen.

Showing:

FIG. 1

a control device with an electronic control unit for controlling an electric motor of a window lifter, and

FIG. 2

a schematic functional sequence for different hood types.

In FIG. 1 a control device of a window lift of a motor vehicle is shown. The control device comprises control electronics with a anti-trap function. In addition, the control electronics are connected via a bus with other functional units of the motor vehicle, wherein via the bus information about the mounted concealment type to the control electronics of the control device is transferable. The control electronics has a common electronic memory, in which at least the data required for the anti-trap protection are stored, written and readable under algorithms.

Furthermore, the control device has a sensor detection of a dependent of a drive movement of a drive of the window lifter position of a window pane of the window regulator. The position is at the bottom and top of the FIG. 1 , Which determined the course of the speed n of the window regulator motor over the Position x points represents. One also not in the FIG. 1 illustrated arithmetic unit of the control electronics has a function for the combined evaluation of the current position x of the window pane and a position and a type of hood of the motor vehicle.

The arithmetic unit of the control electronics has a detection algorithm for detecting at least one parameter dependent on the drive movement. This characteristic is in the in the FIG. 1 illustrated embodiment, the speed n of the window regulator motor M. If the speed n of the window regulator motor M falls below in the FIG. 1 shown Reversierkriterium that is exemplified by a threshold value of the detection algorithm, the pinching of an object or a body part is detected and the control electronics then stops the closing movement of the window regulator. Subsequently, the drive of the window regulator motor is operated in the direction of opening, so that reverses the adjustment of the window pane. Instead of the rotational speed n, another signal dependent on the drive movement, such as, preferably, the drive current or the temporal change in the rotational speed dn / dt can be compared for evaluation with a reversing criterion.

The reversing criterion acting as a threshold value, which in the upper and lower part of the FIG. 1 is determined by a plurality of parameters that can be stored in the common electronic memory, determined. The memory is, for example, a non-volatile memory (EEPROM), which also receives a storage of the parameters for the detection of a trapping case, even in the event of a failing power supply. With the information transmitted by the bus to the control electronics information about the mounted concealment type is read out by the control electronics in dependence on the mounted concealed type from the common electronics memory the Paramteter the Reversierkriteriums for obstructed type and read to control the drive in a register of the microcontroller of the control electronics.

The parameters for a soft roof (soft top) determine the upper part of the FIG. 1 illustrated course of the Reversierkriteriums, whereas the hard roof (hardtop) associated parameters in the lower part of the FIG. 1 determine the course of the reversing criterion. In the case shown, the inlet of the window pane in the seal of a soft top of the inlet into the seal of a hard top, as shown in the lower part of FIG. 1 is shown, different. While in the case of the soft top, the speed of the window regulator motor drops much slower, behaves the mechanical system with a mounted hardtop less elastic, as in the lower part of the FIG. 1 is shown.

As a result, the reversing criterion for these different types of hood must be adjusted accordingly to the different courses of movement when retracting the window pane edge in the seal of the soft top or hardtop to prevent Fehlreversieren and reduce the risk of entrapment. Depending on which type of concealment is currently installed, it is possible to optimally adapt the reversing criterion to the expected change in the speed of the window regulator motor in the region of the seal.

In FIG. 2 schematically a functional sequence for different top types is shown. After the start of the adjustment of the window lifter is first checked in step 1, whether a soft or hardtop is installed. This information about the hidden type installed will be as in FIG. 1 shown, previously transmitted via a bus system to the control device. In the case where a soft top is installed and the in FIG. 1 is expected in the upper range, it is checked in a second step, whether a change of concealed type has taken place from a hard top to a soft top. This check of the second step can be determined for example by means of a stored in the common electronic memory identifier (flag).

If a change has taken place from a hardtop to a softtop in which these different top types have been dismantled or mounted, the reversal criterion for a soft top is adapted in step 3 by changing the corresponding parameters of the soft top from the common electronic store to the current register of the microcontroller Control electronics are loaded. These parameters are initialized as anti-trap adaptation data. Pinch guard adaptation data in this case means that the parameters used for the soft top are determined by re-measurements of the window regulator speed for the seal inlet and the parameters are readjusted accordingly to compensate for and adapt to changing conditions of elasticity of the seal and the position of the seal.

In step 4 of the FIG. 2 , which follows directly to step 2 or step 3, is checked on the basis of a bus information, whether the hood is closed. In the affirmative case, the parameters for the soft top in step 5 of the FIG. 1 dynamically adjusted, averaged in the further adjustment movement in the seal inlet and corresponding evaluated by the seal-related bindings. Following one of the steps 4 or 5, further processes for calculating the anti-jamming protection may follow in step 6.

If a hardtop is installed starting from step 1, then it is again checked in step 7 whether a change from soft to hardtop has taken place. In the affirmative case, the initialization of the adaptation data read in the common electronic memory for this hardtop takes place again in the 8th step. Subsequent to the steps 7 or 8 again takes place in step 5, the dynamic adjustment of the anti-pinch thresholds form the Reversierkriterium, regardless of the query in step 4, since a hardtop is always closed.

LIST OF REFERENCE NUMBERS

n

rotation speed

bus

CAN bus, LIN bus, bus system

FH

power windows

EKS

pinch

Claims (19)

1. Method for control of a window lifter of a motor vehicle, in which the position of a window pane of a window lifter is detected, and actuation of the window lifter is controlled depending on the position detected and on the status of a top of the motor vehicle,
   characterised in that
   for control, the current position of the window pane as well as the position and type of the top are jointly evaluated.
2. Method according to claim 1,
   characterised in that
   a signal characterising the state of the top is transmitted via an interface, particularly via a bus, to a control device designed for control.
3. Method according to any one of the preceding claims,
   characterised in that
   the status of the top is detected by a plausibility test of the current position of the window pane.
4. Method according to any one of the preceding claims,
   characterised in that
   the status of the top is detected by evaluation of blocking characteristics on the closed position of the window pane.
5. Method according to any one of the preceding claims,
   characterised in that
   for control, a closing motion of the window pane is stopped, if it is detected within a detection position region that an object or a body part is stuck due to the closing motion.
6. Method according to any one of the preceding claims,
   characterised in that
   for detection, parameters dependent on the actuation movement are evaluated by means of a detection algorithm, and one or several parameters of the detection algorithm depending on the type of top are adapted.
7. Method according to any one of the preceding claims,
   characterised in that
   the parameter assigned to the type of top, depending on the status of the top, is read out from a storage device.
8. Method according to any one of the preceding claims,
   characterised in that
   the parameter is acquired depending on one or several previous adjustments.
9. Method according to any one of the preceding claims,
   characterised in that
   for acquiring the parameter, location-dependent speeds or location-dependent stiffness are evaluated, particularly averaged.
10. Control device of a window lifter of a motor vehicle, with a sensor for detection of a position of a window pane of a window lifter, depending on a drive movement of a drive of the window lifter,
    characterised by
    a computational unit, which comprises a function for combined evaluation of the current position of the window pane, as well as a position and a type of a top of the motor vehicle,
11. Control device according to claim 10,
    characterised by
    an interface, particularly a bus of the motor vehicle, by means of which a signal characterising the status of the top can be transmitted, whereby the computational unit is set up to evaluate this signal.
12. Control device according to any one of the preceding claims,
    characterised in that
    the parameter assigned to the type of top, depending on the status of the top, is stored in a storage device of the computational unit.
13. Control device according to any one of the preceding claims,
    characterised in that
    several parameters form a characteristic diagram for response sensitivity.
14. Control device according to any one of the preceding claims,
    characterised in that
    at least one of the parameters forms a shift in position (offset) for the response sensitivity.
15. Control device according to any one of the preceding claims,
    characterised in that
    the parameters are adapted to different sealing properties, which occur in combination with the pane edge, of different types of tops.
16. Control device according to any one of the preceding claims,
    characterised in that
    the computational unit is designed for acquiring the parameter depending on one or several previous adjustments.
17. Control device according to any one of the preceding claims,
    characterised in that
    for acquiring the parameters, the computational unit is designed to evaluate, particularly to average, location-dependent speeds or location-dependent stiffness.
18. Window lifter of a motor vehicle with a control device according to any one of claims 10 to 17.
19. Computer programme product with a programme code, stored on a machine-readable carrier, for carrying out the method according to any one of claims 1 to 9, if the programme product runs on a computational unit.

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