WO2014019579A1

WO2014019579A1 - Method for putting into operation a vehicle transmission and/or a vehicle clutch

Info

Publication number: WO2014019579A1
Application number: PCT/DE2013/200068
Authority: WO
Inventors: Werner Schmitt; Michael Schuhen
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2012-08-02
Filing date: 2013-07-19
Publication date: 2014-02-06
Also published as: DE112013003823A5; DE102013214206A1; JP2015524902A

Abstract

The invention relates to a method for putting into operation a vehicle transmission having a transmission actuator for activating the vehicle transmission and/or for putting into operation a vehicle clutch having a clutch actuator for activating the vehicle clutch, wherein a first control unit, which comprises a first non-volatile memory unit, controls the transmission actuator and the clutch actuator, which has a second non-volatile memory unit, wherein data is stored in the second non-volatile memory unit of the clutch actuator. In the case of automated data transmission, the first control unit which is to be put into operation causes transmission of the data from the second non-volatile memory unit of the clutch actuator into its first non-volatile memory unit.

Description

Method for starting up a vehicle transmission and / or a vehicle clutch

The invention relates to a method for starting up a vehicle transmission with a transmission actuator for actuating the vehicle transmission and / or commissioning a vehicle clutch with a clutch actuator for actuating the vehicle clutch, wherein a, a first non-volatile memory unit comprehensive first control unit the transmission actuator and the second non-volatile memory unit having clutch actuator controls, wherein in the second non-volatile memory unit of the clutch actuator data is stored.

In motor vehicles, actuators are used, for example, to actuate an automated transmission or to actuate an automated friction clutch. Thus, for the actuation of an automated friction clutch, a hydrostatically operated actuator (HCA-Hydrostatic Clutch Actuator), as disclosed for example in DE 10 2010 047 801 A1, used. An actuator is understood to mean a system which converts electronic signals, for example from a controller, into a mechanical movement.

Coupling and / or transmission systems are known which comprise an actuator comprising a non-volatile system-specific data storage unit. The actuator comprises, in addition to the non-volatile memory unit, an actuator-specific control device, in which the non-volatile memory unit is arranged. As can be seen from FIG. 1, the transmission 1 produced in a production facility is a dual-clutch transmission which has two clutch actuators 2, 3. In addition, the transmission 1 comprises a transmission actuator 4. The thus formed transmission 1 is connected to a test stand 5, which includes a test stand internal gearbox control unit 6, which is connected to a test bench PC 7. The test stand-internal gearbox control unit 6 is connected via a separate CAN bus 8 with the two clutch actuators 2, 3. In addition, there is a connection of the test stand-internal gearbox control unit to a gear actuator 4 via a separate communication line. 9 Prior to commissioning of the clutch and / or transmission system, these systems must undergo a process prior to their use in the motor vehicle due to existing tolerances, in which system-specific data is learned. The commissioning process is usually initiated and controlled in the production facilities by means of test benches 5 or mobile test equipment. Since the transmission is not yet equipped with its own control unit at this time, however, the parameters underlying the commissioning routines are transmitted from the transmission test bench 5 to one of the clutch actuators 2 or 3 and temporarily stored there in a non-volatile memory unit 10. The clutch actuator 2, 3 is permanently installed with the transmission 1 and is used together with the transmission 1 at the vehicle manufacturer in the motor vehicle. In the motor vehicle, this transmission 1 is now connected to a new transmission control unit, which has hitherto not been used, for which reason no commissioning data has yet been stored in the new transmission control unit.

After installation of the transmission 1 in the motor vehicle, the commissioning data from the non-volatile memory unit 10 of one of the two clutch actuators 2, 3 must be transmitted to the transmission control unit. This data transmission is stimulated either by a mobile tester or by a third, present in the motor vehicle control unit. The tester or the third, existing in the motor vehicle controller gives it to the

Clutch actuator 2, 3, which contains the non-volatile memory unit 10, a request signal to transmit the data from the clutch actuator 2 in the on-board transmission control unit.

The use of external testers is costly, since these must first be procured and integrated into the workflow of the vehicle manufacturer. In addition, they must be set up, programmed and maintained. To initiate the commissioning process by the mobile tester or existing in the motor vehicle third control unit employees to control and monitor the data transmission processes are necessary, resulting in a cost and time disadvantage.

The invention is therefore based on the object to provide a method for commissioning a vehicle transmission, which allows reliable data transmission from the clutch actuator in the vehicle's transmission control unit and cost and time. According to the invention, the object is achieved in that the first control unit to be put into operation causes a transmission of the data from the second non-volatile memory unit of the clutch actuator into its first non-volatile memory unit. Because the control unit to be initialized itself activates the process of data transmission, this process is automated, so that it is possible to dispense with a mobile tester or a third control unit of the motor vehicle, which saves hardware and personnel costs.

Advantageously, the data correspond to the commissioning parameters of the transmission and / or the clutch. Thus, this data, which is needed solely to operate the on-board transmission control unit, is transferred from the second non-volatile memory unit of the clutch actuator, thereby realizing automatic transmission start-up.

In one refinement, the first control unit, when it is put into operation, checks its first non-volatile memory unit for the presence of default values. Default values are to be understood below as the default settings of parameters which were entered in the first control device during its final production. If the first control unit recognizes that only default values are stored in the first non-volatile memory unit, then it can be assumed that the first control unit has not yet been put into operation. The examination of the default values represents a simple method for triggering the commissioning of the first control unit.

In one variant, a status of a startup indicator, preferably a startup flag, is checked to default values for checking the first non-volatile memory unit. This is the simplest case of the commissioning test, which can be realized without much time.

In a development, the first non-volatile memory unit of the first control unit is checked by the first control unit after switching on the ignition of a motor vehicle in which the transmission is installed. When the "ignition on" signal is initially applied, the first control unit is signaled that the default values are to be checked, and no additional signals are generated which trigger this process signal used in the motor vehicle, whereby the software for testing the commissioning of the control unit is simplified. In one embodiment, in the presence of default values in the first non-volatile memory unit of the first control unit, a data request signal is sent from the first control unit to a second control unit of the clutch actuator, which responds to the second control unit of the clutch actuator with a number of the stored or the data to be transmitted , By transmitting the number of data to be transmitted at the same time a test is installed, by means of which the error-free transmission of the data is monitored. If the number of transmitted data does not agree with the number of data to be transmitted reported by the second control unit of the clutch actuator, the transmission of the initialization parameters has failed.

Alternatively or additionally, a check sum of the data to be transmitted is transmitted from the second control device to the first control device together with the data to be transmitted. Checking the checksum also provides a way to determine the incorrectness of the transmission of the data.

In another variant, together with the data to be transmitted, a version identifier of the software underlying the data to be transmitted is transmitted from the second control unit to the first control unit. This ensures that the first control unit works exactly with the same software with which the commissioning parameters were generated in the test bench of the production facility. If it is determined that different software versions are being used, data transmission will not be recognized for safety reasons, since other interpretations of the parameters used may have been used and this would lead to faulty functioning of the transmission or clutch, possibly affecting safety of the vehicle.

In one embodiment, the first control unit causes the transmission of data from the second non-volatile memory unit of the clutch actuator in its first non-volatile memory unit again in an erroneous transmission of data after a predetermined waiting time. This ensures that the transmission of the initialization parameters can be retried after a faulty transmission. However, this ensures that the number of repetitions of the transmission of the initialization parameters is limited.

Advantageously, after the transmission of the data from the second non-volatile memory unit of the clutch actuator transmits to the first non-volatile memory unit the first control device, the first control device to the second control device, a deletion or non-re-transmission request for the transmitted data. This ensures that the data once transferred to the initialization of the first control unit will not be sent again. This is particularly important for safety reasons, since the system-specific parameters of the transmission during use of the transmission or the clutch in the motor vehicle by wear or aging change and thus no longer comply with the commissioning parameters of a new transmission. A renewed transmission of the commissioning parameters would lead to malfunction in a retracted transmission and thus to disruptions in the safety of the motor vehicle.

The invention allows numerous embodiments. One of them will be explained in more detail with reference to the figures shown in the drawing. It shows:

Figure 1: Schematic situation in the gearbox or on the test stand, connection of

transmission

Figure 2: A schematic diagram of a transmission system of a motor vehicle with a

Double clutch.

Identical features are identified by the same reference numerals.

The schematic representation shown in Figure 2 illustrates the arrangement of the control units of the transmission system, which is a parent of a clutch system. The clutch system is designed as a double-clutch system and has two clutch actuators 2, 3, each clutch actuator 2, 3 having an automated clutch to which a clutch control unit 1 1, 12 is provided for driving an electromechanical drive unit of the clutch. Each of the clutch control units 1 1, 12 in this case has a non-volatile memory unit 10, 13 uniquely assigned only to this clutch control unit 11, 12.

The clutch control units 1 1, 12 of the clutch actuators 2, 3 are connected via a separate, designed as a CAN bus communication line 14 with a transmission control unit 15. This transmission control device 15 also includes an internal non-volatile memory unit 14. A non-volatile memory unit is understood to mean a memory unit which does not lose its memory content even when the power supply to the memory unit is switched off or fails. The memory contents are therefore after renewed power supply the storage unit available again. Examples of such non-volatile memory units are EEPROMs.

In addition, the case will be considered that the transmission 1 is installed together with the two clutch actuators 2, 3 in the motor vehicle. At the same time the new transmission control unit 15 is used in the motor vehicle and connected via the connecting line 9 with the gear actuator 4 of the transmission 1. The gear actuator 4 is also firmly installed in the transmission 1. In one of the non-volatile memory units 10, 13 of the clutch control units 1 1, 12 of the clutch actuators 2, 3 while the commissioning data for the transmission 1 are stored, which in the transmission of the test bench 5 in one of the non-volatile memory units 10, 13 of the clutch control units , 12 have been transmitted. In the following, it is assumed that only one of the memory units 10, 13 stores the commissioning parameters. However, it is also conceivable that the commissioning parameters are stored redundantly in both memory units 10, 13.

If the control unit 15 and the transmission 1 installed in the vehicle, so is with the

first occurrence of the signal "ignition on", in which a voltage is applied to the transmission control unit 15, checked by the transmission control unit 15 itself, whether default values are still in its first non-volatile memory 14. In the simplest case, the status of this If the transmission control unit 15 detects that the flag indicates the status 0, it is concluded that the transmission control unit 15 has not yet been put into operation the separate communication line 8, which is designed as a CAN bus, a data request signal to the second clutch control unit 1 1 of the first clutch actuator 2. The second clutch control unit 1 1 of the first clutch actuator 2 responds to the data request by this the number of stored or to transferring parameters used in its non-volatile ers Memory unit 10 are cached, communicated to the transmission control unit 15. Simultaneously with the transmission of the number also stored in the first non-volatile memory unit 10 commissioning data is transmitted. The CAN identifications used for communication between the transmission control unit 15 and the clutch control unit 1 1 are only active at the time of transmission of the commissioning data on the separate communication line 8. At the same time as the number of stored and transmitted data is transmitted, a check sum and / or a version identifier of the software with which the commissioning parameters were determined can additionally be transmitted. In this case, the number of transmitted data as well as the checksum and the version identifier give the transmission control unit 15 the opportunity to detect possible errors in the transmission of the data. If the transmission control unit 15 determines that the number of transmitted data does not coincide with the number reported by the second clutch control unit 11 of the clutch actuator 2, the data transmission is aborted. This is also the case when the checksum formed by the transmission control unit 15 is different from the checksum sent by the second clutch control unit 11. Even if the version ID of the software with which the commissioning data was generated in the transmission 1 is different from the version ID of the software with which the transmission controller 15 operates, an error is detected and the start-up flag keeps its original state and remains the value 0.

If an error occurs during transmission of the commissioning data, a renewed request for a request to the second clutch control unit 11 of the first clutch actuator 2 can be sent out after a predetermined waiting time by the transmission control unit 15. However, the number of repetitions is limited, as in a multiple failure, a check of the software must be made.

If, however, the data transmission is completed without error, the state of the commissioning flag is changed, whereby it assumes the value 1. In the case of a renewed command "ignition on", the transmission control unit 15 will recognize from the state of the start-up flag that the data has already been updated, and it is based on the transmission of a data request signal to the second clutch control unit 1 1 of the first

Clutch actuator 2 omitted.

In the proposed method, two cases are to be distinguished. If no parameters have been stored in the second clutch control unit 11, the information "no parameters present" is fed back to the transmission control unit 15 and the transmission control unit 15 will thus not read any data in. The start-up flag does not change its status of the status of the startup flag only after successful commissioning Replacement of a gearbox control unit by a new gearbox control unit in the workshop or at the dealer of importance.

In the event that data is stored in the second clutch control unit 1 1 of the clutch actuator 2, the information "x parameter present" is returned to the transmission control unit 15, where x is the number of parameters, which in this case is not equal to 0. The transmission control unit In this case, 15 reads in the data, the status of the commissioning flag being set to "data updated", ie 1, after successful transmission and checking of the data.

To prevent a repetition of the transmission of commissioning after successful data transmission, the transmission control unit 15 sends a request to the second clutch control unit 1 1 of the first clutch actuator 2, after which the data in the non-volatile memory unit 10 of the second clutch control unit 1 1 are to delete on future request of these data these are no longer to be sent. This reliably prevents the data from being reused because these data correspond to a new transmission and the transmission parameters change in use as a result of wear or aging.

The described procedure takes place without the involvement of an external tester or personnel and is therefore not visible in the process from the outside. In order to enable visualization, this process could be made possible by controlling an existing display in the vehicle, the display can visualize the different states, for example, the representation of characters, letters, numbers or different flashing frequencies.

Due to the described method, an automated transmission of the commissioning parameters in a new transmission control unit in the motor vehicle is possible, whereby hardware and personnel costs are substantially reduced. LIST OF REFERENCE NUMBERS

transmission

First clutch actuator

Second clutch actuator

gear actuator

Test bench

Test bench own gearbox control unit

Test stand PC

Separate communication line

connecting line

First non-volatile storage unit

Clutch control device of the first clutch actuator 2

Clutch control unit of the clutch actuator 3

Second non-volatile storage unit

Non-volatile memory unit of the gearbox control unit

Vehicle-specific gearbox control unit

Claims

claims

1 . Method for starting up a vehicle transmission with a transmission actuator for actuating the vehicle transmission and / or starting up a vehicle clutch with a clutch actuator for actuating the vehicle clutch, wherein a first control device (15) comprising a first non-volatile memory unit (14) controls the transmission actuator (4) and the clutch actuator (2, 3) having a second non-volatile memory unit (10, 13), wherein data is stored in the second non-volatile memory unit (10, 13) of the clutch actuator (2, 3) in that the first control device (15) to be put into operation transmits the data from the second non-volatile memory unit (10, 13) of the

Clutch actuator (2, 3) in its first non-volatile memory area (14) causes.

2. The method according to claim 1 or 2, characterized in that the data correspond to commissioning parameters of the transmission (1) and / or the clutch.

3. The method according to claim 1 or 2, characterized in that the first control device (15) checks its first non-volatile memory unit (14) for the presence of default values when it is put into operation.

4. The method according to claim 3, characterized in that for checking the first non-volatile memory unit (14) to default values, a status of a start-up indicator, preferably a start-up flag is checked.

5. The method according to claim 3 or 4, characterized in that the first non-volatile memory unit (14) of the first control unit (15) by the first control unit (15) after switching on the ignition of a motor vehicle, in which the transmission (1) is installed, is checked.

6. The method according to at least one of the preceding claims 3 to 5, characterized in that in the presence of default values in the first non-volatile memory unit (14) of the first control device (15) of the first control unit device (15) to a second control unit (1 1, 12) of the clutch actuator (2, 3) a data request signal is sent, which the second control unit (1 1, 12) of the

Clutch actuator (2, 3) with a number of the stored or the data to be transmitted answered.

7. The method according to at least one of claims 3 to 6, characterized in that transmitted together with the data to be transmitted a checksum of the data to be transmitted from the second control device (1 1, 12) to the first control device (15).

8. The method according to at least one of claims 3 to 7, characterized in that together with the data to be transmitted, a version identifier of the underlying data to be transmitted from the second control unit (1 1, 12) to the first control unit (15) is transmitted.

9. The method according to at least one of the preceding claims, characterized in that in a faulty transmission of the data, the first control device (15) after a predetermined waiting time, the transmission of the data from the second non-volatile memory unit (10, 13) of the clutch actuator ( 2, 3) in its first non-volatile memory unit (14) again.

10. The method according to any one of the preceding claims, characterized in that after the transfer of the data from the second non-volatile memory unit (10, 13) of the clutch actuator (2, 3) in the first non-volatile memory unit (14) of the first control device (15) the first controller (15) sends to the second controller (1 1, 12) an erase or non-re-transmit request for the transmitted data.