DE102008000641A1 - Method for initializing an actuating device of a switching device of a transmission - Google Patents

Abstract

A method is proposed for initializing an actuator of a shifting device of a transmission in which the position detection of the actuating device is used. According to the invention, at least one movement (B1, B2, B3) is performed successively in each direction of movement with the switching device up to a blockage, wherein the respective positions on the blockages are detected by the position detection and wherein at least one of the respective ends of the lane width (GB) and the neutral width (NB) zugeoaltgasse is determined by comparing the distances between the detected positions and the lane width (GB) and / or the neutral width (NB) of the shift gate. Further, a method for initializing an actuator of a shifting device of a transmission is proposed, wherein the position detection of the actuator is used to perform with the switching device in a direction of movement to a blockage at least a first movement (B1) and the gear state after reaching the blockage position to change and then try to continue the first movement (B1), wherein the position at the end of the first movement (B1) as absolute position (S3, S4) is determined.

Description

The The present invention includes a method for initializing a Actuating device of a switching device of a transmission according to the preamble of claim 1 or 8 more defined type.

From the automotive industry automatic transmission with switching devices for engaging gears are well known. There are positive or frictional switching devices are provided. For actuating, for example, form-locking switching devices hydraulically, electromechanically, electromagnetically or pneumatically driven actuators are used. To realize a compactly constructed as possible transmission, the required actuators or switching elements should be placed directly in the vicinity of the switching devices to be operated. For example, in a transmission, which in a not yet published application of the applicant DE 10 2006 049 274 is described, the actuators is arranged in the transmission shafts, which is required to control the movement of the switching devices to determine their current position. The actuating device may comprise an electric motor which is installed in the gear shaft, and whose rotational movement is converted by a mechanical transmission element into a translational movement of the associated switching device. The control or regulation of the electric motor requires a rotor position sensor or a rotation angle sensor, which is usually located on the shaft of the electric motor.

at the controls is in unknown position the switching device requires an initialization. The initialization must, for example, in the event of a fault, after a maintenance or performed after assembly at the end of the tape, because in the aforementioned states, the position of the assigned Switching device is unknown. In known methods for initialization However, the actuator is an additional Absolute position detection required which additional Space required.

Of the The present invention is based on the object, a method to propose the genus described above, in the absolute positions in the shift gate with the position detection of the actuator be determined.

These The object is achieved by the features of claim 1 or 8 solved. Further advantageous Embodiments emerge from the respective subclaims and the drawings.

Therefore is a method for initializing an actuator a switching device of a transmission proposed in which the Initialization z. B. by means of an already existing position detection the actuator is performed. According to the invention with the switching device z. B. one after the other in each direction of movement in each case up to one Blockade at least one movement to be performed, taking the respective positions on the blockages by the position detection be detected and where the the respective end of the lane width and the neutral width associated absolute positions in the shift gate each by comparing the distances between the detected positions and the lane width and / or the neutral width the shift gate are determined.

For example a parent transmission control the inventive Method in unknown position in one of the switching devices a gearbox to absolute positions of the switching devices be able to determine in the respective shift gates. To is advantageously no additional sensors for absolute position detection required, because in the inventive method may be the existing rotation angle sensor, rotor position sensor or the like the actuator can be used to z. B. individual, striking absolute positions in the shift gate. To is with the inventive method in each Movement direction of the actuator of the free Range of motion up to a stop or a blockade drive through and the respective stop positions with the existing Sensing the actuator detected. From the distances between the individual blockade positions are over a comparison with the known lane width and the neutral width the associated Absolute positions in the shift gate determined.

Preferably can be a constraint for referencing the momentum the transmission and also the possibility that the Drive or the output shaft are driven to certain States of the transmission z. B. during the inventive To be able to change the procedure if necessary.

To ensure that a maximum of one position of a switching device is unknown, preferably only the position of a switching device should always be changed while driving. The position of a switching element or a switching device can in turn be stored after a change in position, for example in a non-volatile memory become.

in the Frame of a possible embodiment of the Invention may be provided that the respective ends of the Neutral width assigned absolute positions in the simplest way by a movement of the switching device in each direction of movement can be determined according to the invention when the switching device on both sides in a tooth to tooth position located. Just as easy can the respective ends the lane width associated absolute positions of the switching device be determined when the switching device is not in both directions of movement located in a tooth to tooth position.

If the switching device only in one direction of movement in one Tooth is located on tooth position, this can be due to a change of the transmission state are resolved, so that afterwards the Absolutpositionserfassung can be performed.

Independently whether one-sided or two-sided or none Tooth on tooth position in the switching device is present in the context of the inventive method by the detected positions determined distances or Movement areas of the switching device for determining the respective Absolute positions with the known dimensions of the lane width and / or the neutral width compared. The determined from the comparison Absolute position is sufficient to the other absolute positions using the known dimensions of the lane width and the neutral width to investigate.

The The object underlying the invention can also be achieved by a method for initializing an actuator of a switching device of a Gear solved, in which the position detection the actuator is used to communicate with the indexing device z. B. only in one direction of movement to a blockade at least one perform first movement and the transmission state after to change the achievement of the blockage position, and afterwards a continuation of the first movement to try, taking the position at the end of the first movement, regardless of whether the switching device can be moved or not, as Absolute position to determine.

These Type of initialization is particularly easy and quick to perform, because the switching device are moved only in one direction of movement got to. By changing the gear state at the Blockade position at the end of the movement and through the second Movement attempt of the switching device can be ensured that the switching device is located at a lane end. Consequently This position can be determined as the absolute position of the switching device become, so that the further positions from the given constructive Determine the dimensions of the shift gate.

ever according to the direction of movement can in the inventive Procedure as absolute position the left or right-hand end of the Schaltgasse be reached and recorded.

A Advantageous development of the invention can provide that the proposed method according to the invention, in the switching device moves only in one direction of movement is, with the also proposed method in which the switching device for the absolute position detection in both the one and the other direction of movement is combined. For example, can after the reversal of motion, ie after the second movement, a change be made of the gear state to see if the switching device is located at the end of the shift gate. It is also possible that the change of the transmission state only after the third movement takes place.

Regarding the possible applications of the invention proposed There are no restrictions on the procedure the gearbox type. For example, the inventive Method for position detection and initialization of internal circuit devices z. B. used in dual-clutch transmissions or other transmissions become. Preferably, the method can be electromechanically actuated Switching devices are used. But it is also possible that the method is used in switching devices that are based on a other way to be operated.

Preferably, the inventive method, regardless of its various embodiments in a transmission, in particular a dual-clutch transmission, which in a not yet published document DE 10 2006 049 274 the Applicant is described, the contents of which are fully incorporated, used or used to initialize the provided in at least one countershaft operating means of the switching devices or to determine absolute positions.

The The present invention will become more apparent from the following description of the drawings explained. Show it:

1 a schematic view of a shift gate of a transmission, in which a first possible embodiment of a Verfah inventive method rens is indicated for position detection;

2 a schematic view of a shift gate of a transmission, in which a second possible embodiment of the method for position detection is indicated;

3 a schematic view of a shift gate of a transmission, in which a third possible embodiment of the method for position detection is indicated;

4 a schematic view of a shift gate of a transmission, in which a fourth possible embodiment of the method for position detection is indicated; and

5 a schematic view of a shift gate of a transmission, in which a first possible embodiment of an alternative proposed method for position detection is indicated.

Regardless of the respective embodiments of the two variants of the invention is in the 1 to 5 in each case a shift gate exemplified, in which a switching device or a switching element can move. In the example shown, it is a switching device which can be brought into two switching positions starting from the neutral position. In this way, two gear wheels of the associated transmission shaft are switchable, this representation is to be understood only as an example, so that it is readily possible to provide other switching devices.

The Lane width GB of the illustrated shift gate is determined by the absolute positions S3 and S4 bounded at the respective end of the shift gate. The neutral width NB of the shift gate is limited by the absolute positions S1 and S2. The middle of the shift gate is denoted by 0.

At the absolute positions S3 and S4 becomes the movement of the switching device always blocked or stopped because the switching device the reached each end of the shift gate. At positions S1 and S2, the movement of the switching device is blocked only if a certain gear state is present. This can be z. B. a tooth Tooth position between the teeth of the switching device and be the gear to be switched gear. All positions S1, S2, S3 and S4 are with a certain tolerance and with play afflicted.

The inventively proposed method for initializing an actuator of a switching device of a transmission can be performed differently depending on the version. For example, the sequence is also dependent on which starting point S0 the switching device is located and which conditions are set during initialization at positions S1 and S3. Each initialization from the starting point S0 begins with a movement in a fixed direction of movement, which in the in the 1 to 5 illustrated embodiments corresponds to a movement to the right. But it is also possible to start moving to the left. Due to different positions or states of the transmission at the positions S1 and S2, different sequences of the method according to the invention are possible.

Independently of the respective procedures is in the process provided, at least one absolute position of the switching device in the shift gate to identify, then through the known Dimensions such as the lane width and the neutral width also determine the other absolute positions of the switching device to be able to. To determine the absolute positions, see striking positions used in the shift gate, where a Blockade of the movement of the switching device takes place. In this way these blockade positions are to be identified.

in the Frame of the first method variant according to the invention this is achieved essentially by the fact that first a movement of the switching device takes place until a blockage and then a movement in the reverse direction until again to a blockade is performed. The at the blockades Detected positions are used to control the range of motion of the indexing device to determine and with known dimensions, for example, the To compare the lane width and the neutral width. This can then be the Absolute position of the switching device can be determined.

At the in 1 shown first embodiment of the first variant of the method results in the following sequence of movements of the switching device. A first movement B1 is made to the right until a blockage due to the tooth to tooth position occurs at the end of movement B1. This position at the end of the first movement B1 is detected by the rotor position sensor or the rotation angle sensor of the actuator and in a z. B. non-volatile memory stored. Then, the direction of movement is reversed and carried out a second movement B2 to the left, it comes in the first embodiment again to a blockage due to the tooth to tooth position of the switching device. This position is also detected and stored by the position detection device. Now the distance or the distance between the stored Positi on and compared with the neutral width NB of the shift gate. If the determined distance or the determined distance corresponds to the neutral width NB, the positions are stored as absolute positions S1 and S2. The other absolute positions S3 and S4 at the respective ends of the shift gate can also be determined on the basis of the known structural dimensions of the shift gate. Thus, in this embodiment, as a gear state, a tooth results in tooth position of the gears at the positions S1 and S2.

In the second embodiment according to 2 may be a first movement B1 in contrast to the first embodiment to the right end of the lane, since there is no tooth to tooth position in the switching device in this area. The position at the time of the blockage or at the end of the first movement B1 is detected and stored by the rotation angle sensor. Thereafter, the second movement B2 is initiated, which is reversed relative to the direction of movement of the first movement B1 and thus takes place to the left. The second movement B2 is stopped due to a tooth to tooth position at the left end of the neutral width NB. This position at the end of the second movement B2 is also detected and stored. If the determined distance between the two stored positions neither the neutral width NB nor the gate width GB corresponds, it is necessary to lift the blockage of the switching device at this position by an external operation by rotating the input or output shaft. When this is done, the switching device can be moved to the left end of the shift gate. If the distance between the stored position at the end of the first movement B1 and the present position of the switching device corresponds to the known lane width GB, the stored position at the end of the first movement B1 as absolute position S3 and the right end of the shift gate and the current position at the end the second movement B2 as absolute positions S4 and a left end of the shift gate of the switching device can be used. Thus arise in the second embodiment of the transmission state blockages at the positions S3 and S2.

According to one advantageous development of the invention, the second embodiment be simplified by that at the end of the second movement the blockade position on a comparison with the lane width GB and the neutral width NB is omitted, and for a Change in gear state performed and then the switching device is tried again in the to move the same direction of movement. Independently of, whether the switching device can be moved further or not, the reached position as the end of the shift gate be identified, so that the reached position of the switching device can be determined as absolute position S3.

In 3 a third embodiment of the method according to the invention is shown. The first movement B1 of the switching device is stopped due to a tooth to tooth position at the right end of the neutral width NB. This position is captured and saved again. Then, a reversal takes place so that the second movement B2 takes place to the left. The second movement B2 is blocked in this embodiment only at the left end of the shift gate. A comparison of the distance between the detected positions with the neutral width NB and the lane width GB does not match. According to the third movement B3 is again to the right. The third movement B3 is then blocked at the right end of the neutral width NB due to a tooth to tooth position. Since a comparison of the distance between the current position and the positions at the end of the second movement B2 results in no match with the lane width GB or the neutral width NB, takes place here by an external actuation of the input or output shaft, a lifting of this blockade, so that the Movement B3 is allowed to the right end of the shift gate. Now, the distance between the current position and the position at the end of the second movement B2 is determined and compared with the lane width. If they match, the current position can be used as the absolute position S3 and the right end of the shift gate and the position at the end of the second movement B2 as the absolute position S4 and the left end of the shift gate in the switching device. In this embodiment, resulting from the transmission state blockages at the position S1 and S4.

According to one particularly advantageous development in the third embodiment can be provided that at the end of the second movement or even at the end of the third movement to a comparison with the lane width GB or the neutral width NB is omitted because instead a Change in the transmission state is made and then a renewed movement of the switching device in the same direction of movement is tried. The subsequently detected position of the switching device, regardless of whether the switching device again has moved or not, can then as left or right End of the shift gate are identified. Thus the absolute positions become S4 or S3 clearly determined.

Finally shows 4 A fourth embodiment of the method according to the invention. The first movement B1 is blocked only at the right end of the shift gate, since there is no tooth to tooth position in the switching device before. This position is again detected and stored by the position detection device. Thereafter, the second movement is to the left and is only stopped the left end of the shift gate, since there is no tooth on tooth position of the switching device in this area. Now, the distance between the position detected at the end of the first movement B1 and the position detected at the end of the second movement B2 is determined. When the determined distance agrees with the lane width GB, the position at the end of the first movement B1 can be used as absolute positions S3 and as the right end of the shift gate in the switching device, respectively. In addition, the position stored at the end of the second movement B2 can be used as the absolute position S4 or as the left end of the shift gate in the shifting device. In this embodiment, resulting from the transmission state blockages at the position S3 and S4.

The second process variant according to the invention of the present invention is described in 5 indicated by way of example. In this particularly simple designed process variant, the absolute position detection is realized in that with the switching device starting from S0 in a direction of movement up to a blockage carried out a first movement B1 and the gear state is changed after reaching the blockage position. Thereafter, an attempt is made to continue moving the indexing device, the position at the end of the movement, whether or not the indexing device continues to move, being determined as the absolute position S3 when the first movement was to the right. When the first movement B1 is to the left, the position detected at the end is set as absolute positions S4.

Independently from the respective embodiment can in the inventive Procedures also be provided that a Erstreferenzierung in constantly rotating input or output shaft performed becomes. This would be z. B. on the drive by easy application to realize a Reibschaltelementes or the like. in this connection could be used to hedge the vehicle against unwanted Movements the parking brake or the vehicle brake actuated become. This would ensure that blockages be reliably avoided at the respective end of the neutral width NB. As a result, the inventively proposed Process variants are further simplified.

B1

first Move

B2

second Move

B3

third Move

S1

absolute position or right end of the neutral width

S2

absolute position or left end of the neutral width

S3

absolute position or right end of the lane width

S4

absolute position or left end of the lane width

GB

channel width

NB

neutral width

0

center the shift gate

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102006049274 [0002, 0018]

Claims (12)

Method for initializing an actuating device of a switching device of a gearbox, in which the position detection of the actuating device is used, characterized in that with the switching device successively in each direction of movement up to a blockage at least one movement (B1, B2, B3) is performed, wherein the respective Positions at the blockages are detected by the position detection and wherein at least one of the respective end of the lane width (GB) and the neutral width (NB) associated absolute position (S1, S2, S3, S4) in the shift gate by comparing the distances between the detected positions and the lane width (GB) and / or the neutral width (NB) of the shift gate is determined. Method according to claim 1, characterized in that that a first movement (B1) of the switching device from a starting point (S0) in a fixed direction of movement until the blockage and then a second movement (B2) in the reverse Movement direction to be performed until the blockage, wherein the positions detected at the blocks are absolute positions (S1, S2; S3, S4) are set when the distance between the The blockages detected positions substantially the lane width (GB) or the neutral width (NB). Method according to claim 1 or 2, characterized that the gear state by turning the drive or output shaft is changed when the distance between the at the blockades detected positions not the lane width (GB) or the neutral width (NB) corresponds. Method according to one of the preceding claims, characterized in that a first movement (B1) up to a Blockage due to a tooth on tooth position of the switching device is executed, and that a second movement (B2) in reverse Moving direction up to a blockage due to a tooth on Tooth position of the switching device is executed, wherein the positions at the end of the first movement (B1) and at the end of the second movement (B2) are recorded and stored, and wherein the distance between the stored positions is determined and is compared with the neutral width (NB) of the shift gate, so that the position detected at the end of the first movement (B1) as the absolute position (S1) and the position detected at the end of the second movement (B2) as Absolute position (S2) can be used in the switching device, if the determined distance between the positions of the neutral width (NB) corresponds. Method according to one of the preceding claims, characterized in that a first movement (B1) up to a Blockage and a second movement (B2) in the reverse direction until a blockage is done that positions at the end of the first movement (B1) and at the end of the second movement (B2) are recorded and stored that the distance between the detected positions and with the neutral width (NB) and the lane width (GB) is compared to that of a change of the gear state is performed when the distance between the positions of neither the neutral width (NB) nor the lane width (GB), and then the second movement (B2) continues is executed until a blockage and this position on End of the second movement (B2) is stored, the position at the end of the first movement (B1) as absolute position (S3) and the Position at the end of the second movement (B2) as absolute positions (S4) are used in the switching device when the detected Distance between the positions of the lane width (GB) corresponds. Method according to one of the preceding claims, characterized in that a first movement (B1) up to a Blockade of the switching device and a second movement (B2) in reversed direction of movement to a blockade executed is that a third movement (B3) in the reverse direction of movement until a blockage is executed when the distance between the positions at the end of the first movement (B1) and on the End of the second movement (B2) not with the neutral width (NB) or does not match the lane width (GB), and that carried out a change in the transmission state so that the third movement (B3) continues and that the position at the end of the third movement (B3) as Absolute position (S3) and the position at the end of the second movement (B2) used as the absolute position (S4) in the switching device when the distance between the positions at the end of the third Movement (B3) and at the end of the second movement (B2) of the lane width (GB). Method according to one of the preceding claims, characterized in that a first movement (B1) up to a blockage and a second movement (B2) in the reverse direction of movement up to a blockage is carried out, that the positions are detected and stored by the position detection device, in that the distance between the position detected at the end of the first movement (B1) and the position detected at the end of the second movement (B2) is determined, and that the position at the end of the first movement (B1) is determined as the absolute position (S3) and the position End of the second movement (B2) detected position can be used as the absolute position (S4) in the switching device, if the determined distance between the positions coincides with the lane width (GB). Method for initializing an actuating device a switching device of a transmission, wherein the position detection the actuator is used, in particular according to one of the preceding claims, characterized that with the switching device in a direction of movement up to a blockade at least a first movement (B1) performed and the transmission state after reaching the blockage position is changed, and that after that a continuation the first movement (B1) is attempted, with the position at the end the first movement (B1) is determined as an absolute position (S3, S4). Method according to claim 8, characterized in that the right end of the shift gate is determined as an absolute position (S3) is when the first movement (B1) is executed to the right is, and that the left end of the shift gate as absolute position (S4) is determined when the first movement (B1) is made to the left becomes. Method according to one of the preceding claims, characterized in that the movements at constantly rotating Input or output shaft is performed. Method according to one of the preceding claims, characterized in that the at the respective blockade of the position detection device detected position in a not volatile memory is stored. Method according to one of the preceding claims, characterized in that the respective end of the lane width (GB) and the neutral width (NB) associated absolute positions (S1, S2, S3, S4) are stored in a non-volatile memory.