EP1593805A1 - 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 control device and a method for controlling a Window lift of a motor vehicle.

From DE 197 45 597 A1 discloses a method for controlling and regulating the Adjusting movement of a translationally adjustable component, in particular a Windows in motor vehicles known. In this method of control and Control of the adjustment movement of the translationally adjustable component, with a Setting device, a drive device and a control and regulating electronics is a effective anti-trap protection taking into account even in restricted areas sufficiently large adjustment force and on the vehicle body ensures acting, caused by external forces forces. For this practice the Drive device from an adjustment, equal to the sum of the adjustment of the Component necessary force and an excess force, the sum is smaller or is equal to a permissible pinching force. The adjusting force or the excess force is additionally depending on the vehicle body or parts thereof governed by acting forces.

The solution ensures that it acts over the entire adjustment range Anti-pinch protection that meets the corresponding safety requirements. Furthermore ensures that the adjustment even in the stiffness ranges is sufficiently large and that an adjusting device a translationally adjustable Component taking into account the acting on the vehicle body outer Influences in accordance with the operator material gently adjusted. As outer Influences are here the forces acting on the vehicle body or forces Understood acceleration forces that are not directly through the actuator or be caused by a drive means, but for example because of bad condition of the route (driving through a pothole) or at Close a vehicle door occur.

The regulation of the adjusting force or the excess force is preferably carried out in Dependence on the direction of movement of the translationally adjustable component and from the predominant direction of action occurring acceleration forces such, that the adjusting force is always less than or equal to the permissible pinching force. acts For example, on the vehicle body an acceleration force, the Supports closing movement of a translationally adjustable component, so is preferably the threshold is lowered. In case of occurrence of one of Closing movement opposing acceleration force becomes the threshold increased. In this way, the adjusting force is always sufficiently large, so that the Closing movement safely continued and anti-pinch is guaranteed.

Furthermore, it is provided that when occurring within a predetermined Time varying on the vehicle body acting acceleration forces a regulation of the adjusting force or the excess force is interrupted and a threshold value is specified such that the adjusting force is always less than or equal to the permissible pinching force is. The time span is for example 100 ms. This embodiment takes into account that in constantly changing, on the Vehicle body acting acceleration forces the threshold is not is constantly changing within a short period of time, resulting in impairment could lead to the movement of the translationally adjustable component. By the Specification of a fixed threshold that is always less than or equal to the permissible limit Clamping force is, both a safe movement of the translationally adjustable Ensured component as well as a pinch protection.

The acceleration forces acting on the vehicle body are preferably detected by a sensor, for example by a digital signal delivering Sensor. Digital signals can be easily controlled in a control electronics processed. To set the scheme can thereby single or multiple, time sequential signals from the sensor of the control and regulating electronics be evaluated. The repeated evaluation of the signals of the sensor makes it possible a simultaneous occurrence of the acceleration forces caused by external influences and to identify the forces caused by a trapping case safely.

From DE 195 17 958 a motor drive device for a motor vehicle is known. In the power window apparatus for a power window, the rotation becomes the engine stopped immediately when the movement of the window when turned Motor an obstacle opposes. The motor drive device is used for opening and for closing the movable part (window) and can be selectively operated and be stopped.

An electric current measuring device measures the strength of the motor through in one Start compensation time flowing current, a current magnitude change detection device sets a current increment from the detected current at each constant time interval fixed, and a motor controller provides a first or a second Control signal to the motor drive device, wherein the first signal depending on the polarity of the current increment of 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 Turning directions of the motor allow rotation of the motor when one of the Button switch.

Object of the present invention is a control device of a Adjustment of a motor vehicle to improve as possible. This task will by the method for controlling a window regulator with the features of Claim 1, by the control device with the features of claim 19, the window regulator with the features of claim 40, by the computer program Prodükt with the features of claim 38, and by the digital Storage medium with the features of claim 37 solved. advantageous Further developments of the invention are specified in the subclaims. to Further development of the invention are also the features of the subclaims particularly advantageous with each other and with features of the stated state the technology combined.

Accordingly, a control device having a sensor for detecting one of a drive movement of a drive of the window lifter dependent position Window pane of the window regulator provided. The sensor, for example a Displacement sensor or angular momentum sensor, generated position signals relate to the Position of the windowpane. For example, these counts are counted for one Position value and preferably proportional to the position. For example Position signals from a ripple of a drive current of a mechanical commuted electric motor won. The sensor signals are through the Control device evaluable.

For this purpose, the control device has an analog, but preferably digital Arithmetic unit on which a function for the combined evaluation of the current position the window pane and a state of a hood of the motor vehicle. The evaluation can be done, for example, by a corresponding logic circuit as arithmetic unit, by a hardwired program logic (ROM) as arithmetic unit or by a programmable arithmetic unit.

The invention comprises the control of the window by the position of a Window pane of the window regulator is determined and a drive of the window regulator in Dependent on the determined position is controlled. In the process, become the controller the current position and a state of a hood of the motor vehicle combined evaluated.

In one embodiment of the invention is for the function of the combined evaluation the current position is evaluated depending on the condition of the hood. Consequently, the arithmetic unit has a function of the condition of the hood depending on the current position. For evaluation, the Information about the current position, for example, depending on the state the roof is weighted or assigned differently. The result of the evaluation allows the control of different operating modes, such as normalization or non-normalization at a particular following blocking the adjustment and / or the Activation or deactivation of an anti-trap algorithm and / or the change parameters of the anti-jamming algorithm.

A first variant of the invention provides that the state of the hood a current top position of a particular motor-driven hood is. For example, possible top positions "roof completely closed", "Canopy fully open", "Canopy partially closed" or "Hood closed and not locked ".

In an advantageous embodiment of this variant of the invention, the Control device on an interface, in particular in the execution of a Buses, such as a CAN bus or LIN bus of the motor vehicle. A the Condition of the hood characterizing signal is sent via this interface to the transmitted to the controller control device. The arithmetic unit is thereby set up for the evaluation of this transmitted signal.

A second variant of the invention provides that the condition of the hood through a Plausibility check of the current position of the window pane is determined. The prerequisite for this is that the possibility of certain adjustment positions of To move window pane depend on the state of the hood. Becomes For example, the adjustment of the window pane for an open top to upper mechanical stop of the window lift allows, while in the case of closed hood of the adjustment by blocking the adjustment the window pane is limited to the hood, for example by means of Plausibility check the information obtained that the roof, at least is partially open when the window is above the expected blockage at the Hood is adjusted out.

A development of this second variant of the invention is that the state of Cover by evaluating a blocking characteristic at the closed position of Window is detected. For example, if one for the retraction of Window pane edge in the seal of the hood characteristic speed course determined, the corresponding current top position is this event assigned and carried out, for example, a normalization. The blocking characteristic is also or alternatively different types of hood (hardtop, Softtop) to adjust the control of the window lift accordingly.

Due to errors in the position determination of the window pane Displacements between the determined by the control device position and caused the actual position of the windowpane. In case of a blockage the adjustment between a trapped body part and a blockage To be able to distinguish at the stop of the hood, is a sufficiently accurate Determining the actual position of the window pane edge in relation to Stop of the hood necessary. Errors in the position determination increase the Risk of misjudgment of the actual position by the control device, what the risk of pinching a body part or a Fehlreversierens the window pane on the stop of the hood increased. Around To reduce the risk of the position of the window pane is preferably in relation to Stop of the hood repeatedly normalized.

An advantageous development of this variant of the invention provides a normalization and / or denormalizing the determined position with respect to a disk closing position depending on the condition of the hood. The disc closing position is in particular the attack of the hood or the mechanical stop of the window lift, if the attached to the disc Driver is moved to an upper stop the window regulator rail. These Both 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 when closed.

Preferably, a denormalization does not take place when a blockage is detected and the Condition of the hood is determined as open. In this case, the previous one remains Normalization point of the previously determined position of the stop of the closed Obtained and is advantageously used as input value, if the Top is closed again and the window pane up to the blocking position on Stop the hood is moved.

In a further variant of the invention, the state of the hood is a type of Top, especially a hard roof (hardtop) or soft roof (softtop). In the sense of the Invention, the type of hood can be alternatively or in combination with the Cover position to form the condition of the hood. The control device uses Thereby the information, which roof construction is installed, around the respective Control windows or multiple windows.

Advantageously, the control is a closing movement of the window regulator stopped when the pinching of an object or a body part by the Closing movement is detected within a detection position range. additionally can be reversed after stopping the adjustment of the window around release the jammed object or the clamped body part again.

Here are advantageously dependent on the detection of the drive movement Characteristics evaluated by means of a detection algorithm. One or more Parameters of the detection algorithm are in an advantageous embodiment of Invention depending on the state of the hood, in particular depending adapted to the type of hood. Such parameters are preferably from to expected binding when retracting the window pane edge in the seal depending on the top.

A development of the invention provides that the or the parameters In particular, influencing the response sensitivity of the detection algorithm in such a way that the responsiveness is changed depending on the type of the hood. The responsiveness is, for example, a constant threshold or preferably a variable, position-dependent threshold, the possible binding considered in at least one end region of the adjustment path. For example, depending on the position of the seal of the hood course provided the threshold, so that the sensitivity with increasing Retraction of the window edge in the seal of the hood is reduced.

Preferably, the or the the state, in particular the type the hood associated parameters depending on the state of the hood read out of a memory. Different states of the hood are included assigned different parameter values in the memory. Preferably form a plurality of parameters is a response characteristic map.

A further advantageous embodiment of the invention provides that at least one of Parameter forms a position offset (offset) for the responsiveness. If, for example, an identical course of the sensitivity over the position distances in the adjustment of the window pane for different states of Ceiling specified, is the sensitivity using the position shift to the significant position for the state of the attack of the Adapted top. Preferably, the parameters are different, in Cooperation with the disc edge occurring sealing properties adapted to different types of coverings.

Preferably, the arithmetic unit for learning the parameter or parameters in Dependent on one or more previous adjustments trained. The Learning allows adaptation to different temperatures or changes the mechanical system over the useful life of the motor vehicle. Advantageously, the arithmetic unit is designed to learn the or Parameter location-dependent speeds or location-dependent binding to evaluate, in particular to average. This is a dynamic adaptation of Parameters that determine in particular a reversing criterion possible. The Reversing criterion is preferably a threshold value, the part of said Detection algorithm is. Due to the dynamic adaptation of the parameters is by means of This reversing criterion adjusted the sensitivity.

The invention also includes a digital storage medium, in particular a floppy disk or a memory chip, with electronically readable control signals, so with a programmable arithmetic unit can interact that the position of a Window pane of the window regulator is determined and a drive of the window regulator in Dependent on the determined position is controlled, wherein the control current position and a state of a hood of the motor vehicle combined be evaluated.

Furthermore, the invention comprises a computer program product with on one machine-readable carrier, in particular a semiconductor memory stored Program code for controlling a window regulator of a motor vehicle by the Position of a window pane of the window regulator is determined and a drive of Window is controlled in dependence on the detected position, wherein the Control the current position and a state of a hood of the motor vehicle combined evaluated when the program runs on a computing unit.

In addition, the invention comprises a computer program with a program code for Control of a window lift of a motor vehicle by the position of a Window pane of the window regulator is determined and a drive of the window regulator in Dependent on the determined position is controlled, wherein the control current position and a state of a hood of the motor vehicle combined be evaluated when the program runs on a computing unit.

The invention also relates to a window of a motor vehicle with a Control device comprising at least one sensor for detecting one of a Drive movement of a drive of the window lifter dependent position Window pane of the window regulator, and a computing unit that has a function for Combined evaluation of the current position of the window pane and a state a hood of the motor vehicle comprises.

In the following the invention by embodiments using illustrated drawings explained in more detail. 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.

Show

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.

FIG. 1 shows a control device of a window lifter of a motor vehicle shown. The control device comprises an electronic control system with a Pinch protection. In addition, the control electronics via a bus with more Function units of the motor vehicle connected, wherein via the bus information via the mounted concealment type to the control electronics of the control device is transferable. The control electronics has a common electronic memory, in the at least the data required for the anti-trap protection under algorithms stored, writable and readable.

Furthermore, the control device has a sensor detection of one of Drive movement of a drive of the window lifter dependent position Window of the window lift on. The position is in the lower and upper area 1, which determined the course of the speed n of the window regulator motor over the Position x points represents. A likewise not shown in the figure 1 arithmetic unit the control electronics has a function for the combined evaluation of the current Position x of the window pane and a condition of a hood of the motor vehicle on.

The arithmetic unit of the control electronics has a detection algorithm for detection of at least one of the drive movement dependent characteristic. These Parameter is in the embodiment shown in Figure 1, the rotational speed n of the window motor M. Falls below the speed n of the window motor M a in the figure 1 shown Reversierkriterium that, for example, by a Threshold of the detection algorithm is illustrated, the pinching a Object or a body part detected and the control electronics then stops the closing movement of the window regulator. Subsequently, the drive of the Power window motor operated in the direction of opening, so that the adjustment of the Window pane reversed. Instead of the speed n can also another from the Drive movement dependent signal, such as preferably the drive current or the temporal change of the speed dn / dt for evaluation with a reversing criterion be compared.

The reversing criterion acting as a threshold value, which in the upper and lower part of the Figure 1 is represented by several parameters that are common in the Electronic memory can be stored, determined. For example, the memory is on non-volatile memory (EEPROM), which also stores the parameters for the Detection of a trapping case, even in the event of a failing power supply receives. With the information transmitted via the bus to the control electronics The mounted concealment type is controlled by the control electronics as a function of the mounted concealed type from the common electronic memory the Paramteter of the Reversing criterion for the installed concealed type and read to control the Drive is read into a register of the microcontroller of the control electronics.

The parameters for a soft roof (soft top) determine the in the upper part of Figure 1 illustrated course of the Reversierkriteriums, whereas the to a hard roof (Hardtop) associated parameters in the lower part of Figure 1 the course of Determine reversing criterion. In the case shown, the inlet of the windowpane in the seal of a soft top from the inlet into the seal of a hardtop, as in the lower part of Figure 1 is shown, different. While in the case of the soft top the Speed of the window regulator motor drops much slower, behaves that mechanical system with a mounted hardtop less elastic, as in the bottom portion of Figure 1 is shown.

This results in the fact that the different courses of movement during retraction of the Window pane edge into the seal of the soft top or hardtop Reversing criterion adapted accordingly for these different hood types must be in order to prevent Fehlreversieren and reduce the risk of entrapment. Depending on which concealed type is currently installed, so is an optimal adaptation of the Reversing criterion to the expected change in the speed of the Window lift motor in the area of the seal possible.

FIG. 2 schematically shows a functional sequence for different top types shown. After the start of the adjustment of the window lift is in step 1 first checks whether a soft or hardtop is installed. This information about the built Verdecktyp is, as shown in Figure 1, previously via a bus system to the Transfer control device. In the case where a soft top is installed and the in Figure 1 is expected in the upper range speed curve is expected to be in a second step checks if a change of concealed type from one hardtop to another Soft top has taken place. This check of the second step may be, for example by means of an identifier stored in the common electronic memory (flag) be determined.

Has a change from a hardtop to a softtop taken place in which this different roof types were dismantled or mounted, is in step 3 the Reversing criterion adjusted for a soft top by setting the appropriate parameters of the soft top from the common electronics memory into the current register of the Microcontroller of the control electronics are loaded. Thereby these parameters become initialized as anti-trap adaptation data. Pinch adaptation data means in this case, that the parameters used for the soft top by renewed Measurements of the window regulator speed can be determined for the seal inlet and the Be readjusted accordingly to changing conditions of elasticity compensate for the seal and the position of the seal and adapt.

In step 4 of FIG. 2, which follows directly to step 2 or to step 3, reference is made to FIG Bus information checks whether the built-in hood is closed. In the affirmative case the parameters for the soft top are dynamically adjusted in the step of FIG. 5 of FIG. averaged in the further adjustment movement in the seal inlet and corresponding evaluated by the seal-related bindings. On one of the Following steps 4 or 5, in step 6, further processes for calculating the Pinch protection follow.

If a hardtop is installed starting from step 1, then again in step 7 Check if a change from soft to hardtop has taken place. In the affirmative case The initialization of the common electronic memory takes place again in the 8th step read adaptation data for this hardtop. Follow the steps 7 or 8 again takes place in step 5, the dynamic adjustment of Pinch protection thresholds that form the reversing criterion, 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 (40)

Method for controlling a window regulator of a motor vehicle, by
the position of a window pane of the window regulator is determined and a drive of the window regulator is controlled as a function of the determined position, wherein the current position and a state of a hood of the motor vehicle are evaluated in combination for the purpose of control. Method according to claim 1,
characterized in that
for the combined evaluation, the current position is evaluated as a function of the condition of the hood. Method according to one of the preceding claims,
characterized in that
the state of the hood is a current top position of a particular motor-driven hood. Method according to one of the preceding claims,
characterized in that
a signal characterizing the state of the top is transmitted via an interface, in particular via a bus, to a control device designed for the control. Method according to one of the preceding claims,
characterized in that
the condition of the hood is determined by a plausibility check of the current position of the window pane. Method according to one of the preceding claims,
characterized in that
the state of the hood is determined by evaluating a blocking characteristic at the closing position of the window pane. Method according to one of the preceding claims,
characterized in that
a normalization and / or denormalization of the determined position with respect to a disc-closing position in dependence on the state of the hood. Method according to one of the preceding claims,
characterized in that
if a blockage is detected, denormalization will not occur if the condition of the hood is determined to be open. Method according to one of the preceding claims,
characterized in that
the condition of the top is the top position and / or a type of top. Method according to one of the preceding claims,
characterized in that
to control a closing movement of the window is stopped when the pinching of an object or a body part is detected by the closing movement within a detection position range. Method according to claim 10,
characterized in that
for the detection of drive movement dependent parameters are evaluated by means of a detection algorithm, and
one or more parameters of the detection algorithm depending on the state of the hood, in particular be adjusted depending on the type of hood. Method according to claim 11,
characterized in that
the parameter (s) influence the responsiveness of the detection algorithm. Method according to one of claims 11 or 12,
characterized in that
the or the parameters associated with the state, in particular the type of hood, are read from a memory as a function of the condition of the hood. Method according to one of claims 11 to 13,
characterized in that
several of the parameters form a response map. Method according to one of claims 11 to 14,
characterized in that
at least one of the parameters forms a positional shift (offset) for the responsiveness. Method according to one of claims 11 to 14,
characterized in that
the parameters are adapted to different sealing properties occurring in cooperation with the edge of the window of different types of coverings. Method at least according to claim 11,
characterized in that
the parameter (s) are learned in response to one or more previous adjustments. Method according to claim 17,
characterized in that
to learn the parameter or location-dependent speeds or location-dependent bindings are evaluated, in particular averaged. Control device of a window lift of a motor vehicle with a sensor for detecting a dependent of a drive movement of a drive of the window regulator 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 pane and a state of a hood of the motor vehicle. Control device according to claim 19,
characterized in that
the arithmetic unit has a function for the condition of the top depending on the evaluation of the current position. Control device according to one of the preceding claims,
characterized in that
the state of the hood is a current top position of a particular motor-driven hood. Control device according to one of the preceding claims,
marked by
an interface, in particular a bus of the motor vehicle, via which a signal characterizing the state of the top can be transmitted, and wherein the arithmetic unit is set up to evaluate this signal. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is set up to check the plausibility of the current position of the window pane in relation to the state of the convertible top. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit has the function of determining the condition of the hood by evaluating a blocking characteristic at the closing position of the windowpane. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit has the function of normalizing and / or denormalizing the determined position with respect to a disc-closing position in dependence on the condition of the hood. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is set up for non-denormalization depending on the open state of the hood. Control device according to one of the preceding claims,
characterized in that
the condition of the top is the top position and / or a type of top. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is arranged to protect against pinching of an object or a body part by a stop control of a closing movement of the window lifter when the pinching by the closing movement within a detection position range is detectable. Control device according to claim 28,
characterized in that
the arithmetic unit has a detection algorithm for detecting at least one parameter dependent on the drive movement, and
one or more parameters of the detection algorithm as a function of the state of the hood, in particular depending on the type of hood are customizable. Control device according to claim 29,
characterized in that
the parameter (s) influence the responsiveness of the detection algorithm. Control device according to one of claims 29 or 30,
characterized in that
the or the parameters associated with the state, in particular the type of the top, are stored in a memory of the arithmetic unit as a function of the state of the top. Control device according to one of Claims 29 to 31,
characterized in that
several of the parameters form a response map. Control device according to one of Claims 29 to 32,
characterized in that
at least one of the parameters forms a positional shift (offset) for the responsiveness. Control device according to one of Claims 29 to 32,
characterized in that
the parameters are adapted to different sealing properties occurring in cooperation with the edge of the window of different types of coverings. Control device at least according to claim 29,
characterized in that
the arithmetic unit is designed for learning the parameter or parameters as a function of one or more preceding adjustments. Control device according to claim 35,
characterized in that
the arithmetic unit is designed to evaluate, in particular to average, location-dependent speeds or location-dependent bindings for the purpose of learning the parameter or parameters. Digital storage medium, in particular floppy disk, with electronically readable Control signals, which interact with a programmable arithmetic unit may be that a method according to any one of claims 1 to 18 is carried out. Computer program product stored on a machine-readable carrier Program code for carrying out the method according to one of Claims 1 to 18, when the program product runs on a computing unit. Arithmetic program with a program code for performing the method according to one of claims 1 to 18, when the program product on a computing unit expires. Window lift of a motor vehicle with a control device, at least a sensor for determining a dependent of a drive movement of a drive of the window regulator position of a window of the window regulator, and an arithmetic unit having a function for combined evaluation of the current position of the windowpane and a state of a hood of the motor vehicle, includes.

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