DE19915565B4 - Control method for identifying sensors - Google Patents

Abstract

Control method to identify sensors (11a, 11b, 120, 121, 202a, 202b), especially for Sensors for detecting an inserted in a manual transmission Ganges, whose measuring signals signal inputs a control unit (6, 106) are supplied, these measuring signals be processed by the control unit such that an im Gear (3, 103) inserted gear position is detected and a corresponding Gear position signal is generated, wherein at least one actual value at least a measuring signal a sensor in at least one operating point, such as measuring point an engaged gear, with at least one corresponding setpoint is compared and in case of a deviation between actual value and setpoint these are evaluated by the control unit as a permutation of sensors and an interchanging signal is generated, characterized that the Actual values of measuring signals a sensor in two selected Operating points are determined and generates a permutation signal if the ratio the two actual values are greater than or equal to a known nominal value is less than one.

Description

The The invention relates to a control method for identifying sensors, especially for Sensors for detecting an inserted in a manual transmission Ganges, whose measuring signals signal inputs fed to a control unit be, with these measuring signals be processed by the control unit such that an im Gear engaged gear position is detected and a corresponding gear position signal is produced.

It is for example through the DE 195 48 799 have become known to use in manual transmissions of motor vehicles sensors that provide measurement signals for detecting the state of the transmission or the engaged gear. These signals may be applied to a control unit of an automated clutch or automated transmission which uses these measurement signals to generate a gear position signal and, if appropriate, transformed signals for actuating the clutch and / or transmission to actuate, engage or disengage the clutch, or to switch the gearbox via control elements.

These Sensors, especially in vehicles with automated clutch or used with semi-automatic or fully automatic transmissions Need to become to be able to handle both the shift and the select movement to recognize a gear shift element, for which at least one or two or more sensors on a switching element of the transmission, such as arranged or articulated on a central shift shaft of the transmission become.

Around To obtain usable and uniquely assignable measuring signals, the Sensors in the correct way with the provided connections of the Be connected control unit; otherwise the control unit would be wrong measuring signals supplied become unwanted with the consequence or not executable Control operations. The danger of an inadvertently wrong connection can however even with the utmost care never be excluded during assembly.

The Although the risk of incorrect wiring can be due to the use different plug for the sensors are reduced. But this has the disadvantage that the variety of parts elevated is associated with higher Building-costs. Furthermore can not be ruled out that the plug of the sensors are incorrectly mounted, resulting in an incorrect assignment of the measured signals to the transformed signals.

Of the The invention is based on the problem of specifying a method which allows, an identification of sensors connected to the control unit perform.

The The object is achieved by the methods described in claims 1 to 3 are given, solved.

to solution contributes according to the invention, that at least an actual value of at least one measuring signal of a Sensors in at least one operating point, such as measuring point at an inserted Gang, with at least one corresponding target value is compared and in the event of a deviation between the actual value and the setpoint value of this the control unit is evaluated as a permutation of sensors and an interchanging signal is generated. As operating point is a Condition of the transmission or the vehicle designated, the specifiable is, and in which predetermined conditions exist, for example Comparison values for comparison between setpoints and actual values.

there it is useful if stored the interchanging signal in a memory of the control unit becomes. It is also appropriate if the Exchange signal is output from the control unit. This can be visual, with an indicator light, or audible, with a Display tone, done. Similarly, the output on a display in textual representation or by data communication to another tester respectively. This can be done early be recognized that a Interchange exists.

As well it may be appropriate if the permutation signal is passed as an input signal to a correction means This is a correction in the presence of a permutation of sensors performs. The correction means may be implemented in the control unit. It is useful if the Correction means includes a switch, which is controllable and the measuring signals the swapped sensors to the correct signal inputs of the control unit switches. It is also appropriate if the measuring signals the sensors are stored in memories of the control unit and the correction means a return exchange the measuring signals on the corresponding memory of the control unit performs.

It is also expedient if, in the presence of an interchanging signal, a reversal of the measuring signals takes place. It is advantageous if the measurement signals of the sensors are stored in memories of the control unit and the control unit accesses these stored measurement signals during calculations and the correction means carries out an exchange of the access with each access to the stored measurement signals. It is too expedient if the actual values of measurement signals of a sensor are determined in two selected operating points and a permutation signal is generated if the ratio of the two actual values is greater than or equal to one known value not equal to a known setpoint.

Is appropriate it, if the actual values of measuring signals a sensor in two selected operating points are determined and an interchanging signal is generated if one of the two actual values is smaller or larger than the other actual value is.

Farther it is useful if the actual values of measuring signals determined by two sensors at a selected operating point and a permutation signal is generated if the ratio of both actual values are greater than or equal to a known nominal value is less than one. Also, it is useful if the control unit from the measured signals at least one sensor by means of a transformation rule generates a transformed signal, from which the gear position signal is determined.

lautet, worin

σ, ω

die transformierten Signale,

α₁, α₂

die Meßsignale,

R

eine Verzerrungsmatrix mit dem Aufbau

t

einen Translationsvektor mit dem Aufbau

bezeichnen.In one embodiment, it is expedient if the transformation rule for the calculation of the transformed signals from two sensors from the measurement signals

is in which

σ, ω

the transformed signals,

α ₁ , α ₂

the measuring signals,

R

a distortion matrix with the construction

t

a translation vector with the structure

describe.

there it is also appropriate if if there is an interchanging signal, a substitute transformation rule for generating the transformed signals from the measurement signals is used.

lautet, worin

R_E

eine Ersatz-Verzerrungsmatrix

bezeichnet, die sich aus den Elementen der Verzerrungsmatrix R durch Vertauschen der Spalten gemäß der Beziehung

berechnet.It is also expedient if the substitute transformation rule for the calculation of the transformed signals from the measurement signals

is in which

R _E

a replacement distortion matrix

denoted by the elements of the distortion matrix R by interchanging the columns according to the relationship

calculated.

To the inventive idea, it is expedient if that the transformation rule or the replacement transformation rule transformed the measurement signals of the sensors into Signals transformed, wherein during a movement of a transmission switching element in a shift gate only a transformed signal is time-changeable is.

As well it is advantageous if the transformation rule or the Replacement transformation rule the measuring signals the sensors transformed into transformed signals, wherein at a movement of a transmission shift element in a selector gate only a transformed signal is temporally variable.

The sensors, which may be used to detect a gear engaged in the transmission, which may also be identical, are automatically identified following the assembly, depending on the installation of the sensors to different transformation rules for generating the transformed signals from the measurement signals is used. The wiring of the sensors can be determined after assembly by comparing measured signals in selected measuring points with nominal values. If the measured signal actual values agree with the nominal values, within the framework of an error tolerance, the sensors have been correctly mounted and a standard transformation rule is used. If, on the other hand, the measured signal actual values deviate from the nominal values by more than one permissible error tolerance, then the assembly order was not adhered to and there is an error; this error is compensated or corrected by the corrected assignment. Correcting assembly steps are not required in this case, but it is sufficient to transform the measurement signals according to an alternative rule to assign signals or the control signals. Due to the alternative assignment of the measuring signals, the sensors can in any case maintain their mounted position, additional assembly steps ent fall. As a result, identically constructed sensors and sensor plugs can be used without the risk of confusion.

The Transformation rule and the assignment correction can be found in Program form are stored in the control and regulation unit, what a variety of different, alternative associations between the measuring signals and the transformed signals or actuating signals at the same time high flexibility allows.

Of the Comparison of the measured signal actual values with the setpoints takes place in selected operating points, the an unambiguous assignment of the actual values of a measured signal with the desired values allow.

In a first advantageous embodiment of the method according to the invention become the actual values of a single, specific sensor in two selected measuring points certainly and the relationship the two actual values that correspond to a known setpoint got to. differs The relationship the actual values from the setpoint becomes the assignment correction for the formation the transformed signals from the measured signals used.

Around an unambiguous assignment of the transformed signals to the measurement signals to enable the Actual values in the two measuring points take different values, so that the ratio of the two actual values unequal must be one. Under this condition it is sufficient, only the measuring signals a single sensor for detecting the sensor circuit to use.

In In a second advantageous embodiment, the measuring signals taken into account by both sensors, where it is sufficient, the signals of both sensors in a single measuring point take. The relationship the two measuring signals must turn correspond to a specific setpoint; otherwise the measuring signals will become Reassigned to the transformed signals. The ratio of Actual values must be one Value greater or less than one to assign the transformed signals to be able to.

When Transformation rule for the assignment of the transformed signals to the measuring signals in the case of correct wiring, a linear transformation will be appropriate with a 2 × 2 distortion matrix selected the one assignment of two measuring signals allowed to two control signals. The 2 × 2 distortion matrix may be in Good approximation Linearization of a nonlinear kinematic relationship between the transformed signals and the measurement signals are generated.

The corrected, alternative assignment in case of incorrect wiring is preferably in the form of a replacement transformation rule with a replacement distortion matrix. This results in the advantage that the measurement signals taken over unchanged can be; the correction is done exclusively via the Replacement transformation rule. There is an inner one between the distortion matrix and the replacement distortion matrix Correlation caused by swapping the two columns of the distortion matrix expressed can be.

According to one Another, advantageous assignment correction are the measuring signals rückvertauscht, so that the originally in the first position lying Meßsignal actual value to the second Position moves and the original one at the second position lying Meßsignal actual value comes first. This approach has the advantage that the transformation rule unchanged can be and only the measuring signal input in the calculation rule must be reversed.

Further Advantages and expedient embodiments are the further claims, the figure description and the drawing, in which a Wiring diagram for the measuring signals is applied by two sensors.

The Invention will be explained with reference to FIGS. Showing:

1 a schematic representation of the device according to the invention,

2 a schematic representation of the device according to the invention,

3 a diagram,

4 a block diagram and

5a to 5c Charts.

The 1 shows a schematic representation of a device according to the invention for carrying out a method according to the invention. The drive unit 1 is by means of a torque transmission system, such as coupling, 2 in the drive train of the vehicle with a transmission 3 in drive connection. About the torque transmission system 2 and by means of the controllable transmissible torque of the torque transmission system, the output side of the drive wheels pending torque of the vehicle is driven. The transmission output shaft 4 is optionally connected in the force or torque flow via a transmission, such as differential with at least one downstream drive axle and / or with drive wheels.

The means for actuating the torque transmitting system comprises an actuator 5 for controlling or adjusting the transmittable torque of the torque transmission system. The actuating device is in signal communication with a central control unit 6 which is equipped with a central computer unit with memory. For example, sensors are available as detectors which are required for detecting or determining the operating point. As sensors may include, for example, an engine and / or transmission speed sensor 7 . 7a like transmission input speed sensor, as well as a sensor 8th for detecting the accelerator pedal position and a sensor 9 for detecting the position of the shift lever 10 as well as sensors 11a and 11b for detecting a position of a transmission internal switching element 12 , such as the central shift shaft. Furthermore, for example, speed sensors or speedometer, throttle angle, inclination, acceleration or speed sensors can be used. The signals of these sensors are at least temporarily processed by the control unit and by means of the control unit a switching intent of the driver is detected such that the measurement data of the sensors have a time dependence, which is considered a switching intention. The sensor 11a Detects, for example, the axial movement and the sensor 11b the rotational movement of the transmission switching element 12 ,

In vehicles with a manual transmission, such as prior art multi-step transmission, is an operating element 10 , such as shift levers, for manual actuation of the transmission ratio circuit provided with at least one connection means or connection 13 with transmission internal switching elements, such as a central shift shaft, shift rails or shift forks of the transmission is connected. A movement of the shift lever 10 has a movement of the transmission internal switching elements 12 result. Furthermore, within this compound is usually at least one elastic element 14 present, for example, for vibration damping or decoupling or bias of the connection 13 is used.

The detected positions thus represents at least one position of the shift lever or the internal gear shift elements, that is, the engaged gear. The control unit 6 calculated based on the information or signals from at least the sensor 9 or the sensor 11a or 11b the inserted gear.

In the 2 schematically is an embodiment of an automated transmission with a clutch 102 , a gearbox 103 and an output shaft 104 shown. The gearbox is controlled by means of an actuating means 105 actuated automatically, wherein the actuating means the gear shift element 112 , like central shaft, actuated. The coupling 102 is by means of the actuating means 105a automated. The control is carried out by means of a control unit 106 to which the sensors 120 and 121 are connected, which detect the position of the transmission switching element.

unter Verwendung der 2×2-Verzerrungsmatrix R mit den Elementen

und des 2×1-Translationsvektors t mit den Elementen

der Schaltweg σ und der Wählweg ω gewonnen werden. Der Schaltweg σ und der Wählweg ω werden als transformierte Signale einer Steuerungs- und Regelungseinheit zugeführt und dienen der Ansteuerung von Stellelementen des Getriebes bzw. werden im Motormanagement verwendet.In the 3 the measured values of a measuring signal α _{1 of} a first sensor are plotted against the measured values of a measuring signal α _{2 of} a second sensor. The sensors are designed as displacement sensors and are used in manual transmissions, in particular in semi- or fully automatic manual transmissions, for detecting the shift and the selection movement or the engaged gear. The sensors are arranged on the central switching shaft of the gearbox and deliver in a switching operation, the measurement signals α ₁ , α ₂ , from which according to the non-orthogonal transformation rule

using the 2 × 2 distortion matrix R with the elements

and the 2 × 1 translation vector t with the elements

the switching path σ and the selection path ω are obtained. The switching path .sigma. And the selection path .omega. Are supplied as transformed signals to a control and regulation unit and serve to actuate control elements of the transmission or are used in engine management.

The Transformation rule for the transformed signals from the measurement signals is by linearization one dependent on the linkage, kinematically gained nonlinear relationship.

Of the Translation vector t can optionally be omitted or with zero values be occupied.

In the figure, a circuit diagram S with selected non-arbitrary value pairs (α ₁ , α ₂ ) of the measuring signals is shown, representing the slotted guide of the central switching shaft of the transmission during the switching operation. The value pairs of the measuring signals at the positions 1 to 5 and R represent respective gear resting positions; with N is the neutral called the circuit of the circuit. The circuit diagram S shows the setpoint curve for the measured signal value pairs (α ₁ , α ₂ ).

In order to identify the switching arrangement of different or identically constructed sensors, measuring signals of one or both sensors are generated at selected measuring points and compared with the associated nominal values. In the event of a deviation of the measured actual values of the measured signals from the desired values, there is an error in the circuit which is compensated by a correction in the association between the measured signals α ₁ , α ₂ and the transformed signals σ ω.

In a first embodiment, two measuring signals of a single sensor are compared at two selected measuring points. As can be seen from the circuit diagram S, for example, the setpoint value of the measurement signal α ₁ at the gear position 1 is below the setpoint value of the measurement signal α ₁ at the gear position 2, so that a ratio of the setpoint values of the measurement signal α ₁ from gear position 2 to gear position 1 is greater than one result. Corresponding conditions apply for measuring points 3, 4 and 5, R.

In analogous consideration, a ratio of the setpoint values smaller than one results for the measurement signal α _{2 of} the second sensor.

Out the relationship the measured actual values and a comparison with the setpoints the one sensor to be identified, the relevant measurement signal supplies.

For example, the actual values of the measurement signal α _{1 of} the first sensor at the gear positions 1 and 2 are measured. The ratio of the actual values of gear position 2 to gear position 1 must be greater than one according to the circuit diagram S. If this applies to the measured actual values, this is actually the signal of the first sensor and the shading of the sensors was carried out correctly. If this is not true, the sensors were reversed and it is not the measurement signal of the first, but to the measurement signal of the second Sen sors; In this case, the assignment between the measured signals and the transformed signals must be corrected.

The prerequisite for viewing the measuring signals of a single sensor at two measuring points is that the measuring points have different nominal values, ie the measuring points must not lie on a parallels to the α ₁ axis or to the α ₂ axis.

According to a second embodiment, the measuring signals from two different sensors are viewed in one measuring point and set in relation to each other. The ratio of the measuring signals of the two sensors must again be greater or smaller than one in selected measuring points, otherwise there is an error. The measuring points considered must assume different values for this purpose, ie they must not lie on the diagonal d between the α ₁ axis and the α ₂ axis, since otherwise both measuring signals assume the same value and an assignment of the measuring signals to the sensors is not possible ,

For example, consider the measuring point 1, which lies below the diagonal d. In the measuring point 1, the desired value of the measuring signal α _{1 is} greater than the desired value of the measuring signal α ₂ , resulting in a desired ratio of α ₂ to α _{1 is} less than one. The measured actual values must now also have a ratio smaller than one, otherwise the wiring would have been done in the wrong order.

Lies a faulty sequence of the measured actual values of the measuring signals before, must be a corrected Assignment in the transformation instruction between the measuring signals and the actuating signals, which is either by a modified transformation rule or by a return exchange the incoming in the transformation rule measurement signals can happen.

wobei die Ersatz-Verzerrungsmatrix R_E durch Vertauschen der Spalten der Verzerrungsmatrix R gemäß der Beziehung

gebildet wird. Durch Verwendung der Ersatz-Verzerrungsmatrix R_E wird die fehlerhafte Reihenfolge der Sensor-Beschaltung kompensiert.In the case of a modified transformation rule, instead of the distortion matrix R, a replacement distortion matrix R _{E of the} same dimension is used:

wherein the replacement distortion matrix R _{E is} replaced by interchanging the columns of the distortion matrix R according to the relationship

is formed. By using the replacement distortion matrix R _E , the erroneous order of the sensor circuitry is compensated.

Possibly can also over the translation vector t made a correction.

In the case of a back exchange of the measurement signals, only the measured signal-positions of α ₁ and α ₂ must be reversed, so that the measurement signal originally lying in the first place arrives α ₁ now in second place in the transformation rule and the originally lying second measurement signal α ₂ now enters first in the transformation rule, which itself must not be changed.

at a method for identifying sensors in manual transmissions become the measuring signals fed to a control and regulation unit, in accordance with a Transformation instruction transformed signals for admission of actuators for the manual transmission can be generated.

Around to detect the switching arrangement of the sensors, it is provided that the actual value a measuring signal in a selected one measuring point is compared with a setpoint and a deviation of the Actual value of the setpoint in the control and regulation unit a corrected assignment between the measured signals and the transformed Signals is generated.

The measuring signals the two sensors are in accordance with a known kinematic relationship in the actuating signals switching path and dialing path transformed.

The 4 shows a block diagram, in the schematic, a central switching shaft 201 is shown as a gear shift element. This can be twisted and moved axially who the. The sensors 202a and 202b detect the angle of rotation and the axial displacement. The sensors 202a . 202b are by means of cables 203a . 203b with the control unit 213 connected. These are the connectors of the cables in the sockets 220 the control unit 213 plugged. At this point, an erroneous permutation of the two plugs may occur in the assembly.

In the exemplary embodiment, the means for correcting a permutation can intervene, for example, at three locations within the control unit and correct the permutation. For example, an electrical reversal of the terminals of the sensors can be effected by means of a changeover switch, which reverses the connections of the exchanged connectors to the input of the control unit. This is in block 204a shown.

In block 205 becomes the electrical signal of the sensors 202a . 202b converted into information for the microcontroller of the control unit. With 206 are called the inputs of the microcontroller. In block 204b the data or information is available after it has been collected and stored. The storage takes place in 207 , at 204b For example, the unsaved data, such as transformed signals, can be reversed if an interchanging signal is present. In block 204c the data is retransmitted after storage after each memory access and before its further processing by control programs, if an interchanging signal is present.

In block 208 Further control program sequences are carried out, such as the gear recognition and the display of an engaged gear in the display / dis play the motor vehicle. The block 209 represents the means for detecting a sensor interchange. The block 210 represents a memory for storing an interchanging signal. With 211 is the flow of information on the readmission measures. These are all three ( 204a . 204b and 204c ) shown in the one figure, wherein advantageously only one per embodiment is used. With 212 the output of the interchanging information or the interchanging signal is identified.

The 5 schematically shows the facts using a transformation rule or a substitute transformation rule in case of permutation of the terminals. In the upper left diagram 300 is plotted on the ordinate values of the sensor 1, wherein on the abscissa values of the sensor 2 are plotted. A value pair of these sensor values corresponds to a point in the shift gate 301 , ie a gear position or an engaged gear. In diagram 300 the operating point of the commutation test is the engaged second gear. The measured value (actual value) 302 corresponds to the setpoint range 303 , In this case, the nrmal transformation rule is used for the diagram 320 results and the transformed values Transf. Sensor1 and Transf. Sensor2 are calculated such that the values are orthogonal, that is to say that with a movement of the transmission shift element within a shift gate only Transf. Sensor1 values are variable with and a movement of the transmission shift element within the selection lane only values Transf. Sensor2 are variable.

In the lower left diagram 310 is plotted on the ordinate values of the sensor 1, wherein on the abscissa values of the sensor 2 are plotted. A value pair of these sensor values corresponds to a point in the shift gate 311 , ie a gear position or an engaged gear. In diagram 310 the operating point of the commutation test is the engaged second gear. The measured value (actual value) 312 does not correspond to the setpoint range 313 , In this case, the replacement transformation rule is used, so that diagram 320 results and the transformed values Transf. Sensor1 and Transf. Sensor2 are calculated such that the values are orthogonal, that is to say that upon movement of the transmission shift element within a shift gate only Transf. Sensor1 values are variable with and a movement of the transmission shift element within the selection lane only values Transf. Sensor2 are variable.

When comparing the actual value with the setpoint value, a non-permitted large difference is detected. Thereupon, an exchange signal he testifies and, if necessary, issued.

Claims (16)

Control method for identifying sensors ( 11a . 11b . 120 . 121 . 202a . 202b ), in particular for sensors for detecting a gear engaged in a gearbox whose measuring signals are signal inputs of a control unit ( 6 . 106 ), wherein these measuring signals are processed by the control unit such that a in the transmission ( 3 . 103 ) engaged gear position is detected and a corresponding gear position signal is generated, wherein at least one actual value of at least one measuring signal of a sensor in at least one operating point, such as measuring point at an engaged gear, is compared with at least one corresponding setpoint and at a deviation between actual value and setpoint this from the control unit is evaluated as a permutation of sensors and an interchanging signal is generated, characterized in that the actual values of measurement signals of a sensor in two selected operating points are determined and a permutation signal is generated if the ratio of the two actual values is not equal to a known setpoint greater or smaller one is. Method for identifying sensors ( 11a . 11b . 120 . 121 . 202a . 202b ), in particular for sensors for detecting a gear engaged in a gearbox whose measuring signals are signal inputs of a control unit ( 6 . 106 ), wherein these measuring signals are processed by the control unit such that a in the transmission ( 3 . 103 ) engaged gear position is detected and a corresponding gear position signal is generated, wherein at least one actual value of at least one measuring signal of a sensor in at least one operating point, such as measuring point at an engaged gear, is compared with at least one corresponding setpoint and at a deviation between actual value and setpoint this from the control unit is evaluated as a permutation of sensors and an interchanging signal is generated, characterized in that the actual values of measurement signals of a sensor at two selected operating points are determined and an interchanging signal is generated if one of the two actual values is smaller or larger than the other actual value , Method for identifying sensors ( 11a . 11b . 120 . 121 . 202a . 202b ), in particular for sensors for detecting a gear engaged in a gearbox whose measuring signals are signal inputs of a control unit ( 6 . 106 ), wherein these measuring signals are processed by the control unit such that a in the transmission ( 3 . 103 ) engaged gear position is detected and a corresponding gear position signal is generated, wherein at least one actual value of at least one measuring signal of a sensor in at least one operating point, such as measuring point at an engaged gear, is compared with at least one corresponding setpoint and at a deviation between actual value and setpoint this from the control unit is evaluated as a permutation of sensors and an interchanging signal is generated, characterized in that the actual values of measuring signals from two sensors are determined at a selected operating point and an interchanging signal is generated, if the ratio of the two actual values is greater than a known setpoint or is less than one. Method according to one of claims 1 to 3, characterized that this Interchanging signal is stored in a memory of the control unit. Method according to one of claims 1 to 3, characterized that this Exchange signal is output from the control unit. Method according to one of claims 1 to 3, characterized that this Exchange signal as an input signal passed to a correction means This is a correction in the presence of a permutation of sensors performs. Method according to Claim 6, characterized that this Correction means includes a switch, which is controllable and the measuring signals of the swapped sensors for the right signal inputs Control unit switches. Method according to Claim 6, characterized that the measuring signals the sensors are stored in memories of the control unit and the Korrek turmittel a return exchange the measuring signals on the corresponding memory of the control unit performs. Method according to Claim 6, characterized that at If there is an interchanging signal, a reverse interchange of the measuring signals he follows. Method according to Claim 6, characterized that the measuring signals the sensors are stored in memories of the control unit and the control unit for calculations on these stored measuring signals accesses and the correction means with each access to the stored measuring signals swap the access. Method according to one of claims 1 to 3, wherein the control unit from the measurement signals of at least one sensor by means of a transformation rule generates a transformed signal, from wel chem the gear position signal is determined. A method according to claim 11, characterized in that the transformation rule for the calculation of the transformed signals from two sensors from the measurement signals

where σ, ω is the transformed signals, α ₁ , α _{2 is} the measurement signals, R is a distortion matrix of the construction

t a translation vector with the structure

describe. Method according to one of the preceding claims, characterized characterized in that If there is an interchanging signal, a substitute transformation rule for generating the transformed signals from the measurement signals is used. Method according to Claim 13, characterized in that the substitute transformation rule for the calculation of the transformed signals from the measured signals

where R _E denotes a replacement distortion matrix resulting from the elements of the distortion matrix R by interchanging the columns according to the relationship

calculated. Method according to one of the preceding claims, characterized characterized in that Transformation rule or the replacement transformation rule the measuring signals the sensors transformed into transformed signals, wherein at a movement of a transmission shift element in a shift gate only a transformed signal is temporally variable. Method according to one of the preceding claims, characterized characterized in that Transformation rule or the replacement transformation rule the measuring signals the sensors transformed into transformed signals, wherein at a movement of a transmission shift element in a selector gate only a transformed signal is temporally variable.