DE102012218252A1 - Method for starting transmission of dual-clutch transmission system in motor car, involves transferring data from non-volatile storage area to storage area of control unit using diagnostic command, when specific condition is satisfied - Google Patents

Abstract

The method involves controlling clutch actuator (80,90) and transmission actuator by respective control units (30,40). The clutch actuator (80) is uniquely assigned with non-volatile storage area (130). The control units are uniquely associated with respective storage areas (140). The data is transferred from non-volatile storage area to storage area of control unit using diagnostic command, when predetermined condition is satisfied. The data is processed and is transferred to another storage area of control unit (30) using another diagnosis command.

Description

The invention relates to a method having the features according to the preamble of claim 1 and a method having the features according to the preamble of claim 2.

The field of application and the purpose of the invention is directed to clutch and transmission systems, in particular dual-clutch transmission systems in motor vehicles.

Commissioning processes are usually initiated and controlled in the production facilities by means of test benches or mobile test equipment. The processing of the individual processes is generally referred to as EndOfLine (EOL). In the present case, during commissioning of a test stand or a tester certain diagnostic commands - hereinafter referred to as basic diagnostic commands - via an interface (preferably CAN) sent to the commissioning control unit. As a rule, however, identical diagnostic commands for commissioning in the production plants (plant) and in the service (workshop) are used in this case via workshop testers, for example, after replacement or repair of vehicles.

In the context of this document, commissioning always refers to the initial commissioning of entire systems, such as a dual-clutch transmission, or individual components such as control units or actuators, or initial reconnection after repair.

In the context of this document, the abbreviation TCU is understood to mean any transmission control device for controlling a motor vehicle transmission, any clutch control device for controlling one or more motor vehicle clutches, and in particular any control device for controlling a transmission and for controlling one or more clutches, in particular any control device for controlling a dual clutch transmission. Double clutch transmissions have long been known and, for example, in the DE 10 2008 023 360 A1 shown.

In the context of this document, the abbreviation HCA any actuator, for example, for actuating an automated friction clutch in particular a hydrostatically operated clutch actuator (Hydrostatic Clutch Actuator) as it is for example in the DE 10 2010 047 801 DE or the DE 10 2010 047 800 DE, understood. However, at least one non-volatile memory must be uniquely, firmly assigned to each HCA, for example in on-premises electronics of the HCA. The terms HCA and transmission HCA are used interchangeably in this document.

For the purposes of this document, the terms diagnostic routine, diagnostic function, diagnostic service and diagnostic command are used interchangeably.

In the context of this document, the terms software, routine, function, process are also used essentially synonymously.

Other abbreviations used in this document are:
GW: gearbox, FW vehicle plant, ABS: AntiBlockierSystem, ECU: Engine control unit of the drive motor of the motor vehicle, MM-Interface, MMI: human-machine interface), EOL: EndOfLine, UDS, UnifiedDiagnosticServices: Standard communication protocol of the standard diagnostic commands.

In a TCU-HCA system - for example, a dual-clutch transmission - are in accordance with the prior art, such as in 2 is shown, the control commands sent via CAN from the test bench in the gearbox to the TCU, which implements the specifications accordingly. Here are especially the learning of the gear geometry to mention.

The commissioning processes can also be relocated or distributed to several stations or production sites. Thus, complete or partially tested / functioning systems can already be available at EOL, which shortens the scope of commissioning at the following stations / production sites.

In the present case, commissioning operations can already take place in the gearbox (GW); The learning processes carried out there then no longer necessarily have to be carried out in the vehicle plant (FW).

The use of external control units such as test stands or testers for EOL processes is costly, testers must be procured, integrated into the plant IT network, set up, programmed and maintained, depending on the process, employees are required to control and monitor the EOL processes, thus, there is a cost and time penalty.

Solutions are already known in which the EOL steps are triggered via standard MM interface (human-machine interface) of the vehicle without a test stand or tester. Gears are learned, for example, when a worker in the vehicle plant, the brake is actuated and performs a special selector lever sequencing after "ignition on". But this is only possible if the controller to be commissioned acquires the standard MM interface.

It also seems feasible to have individual EOL steps executed independently by the control unit if it recognizes that these EOL steps have not yet been executed, since there is no EOL data for this. Here, however, there is the risk that if EOL data is lost while the vehicle is in operation, these steps may be repeated, which may result in a dangerous or unexpected driving situation. Additional hedging measures are necessary.

Furthermore, commissioning processes in which parameters are determined were split (parameters already learned in the GW) in order to save time and thus costs in the FW, so the learned values must be transferred to the FW. It is optimal if the parameters can already be stored in the GW in a control unit, which will also be used in the vehicle in the future. Since this is not always the case - in particular, if the target ECU is not installed on the transmission - the parameters must be transferred in another way in the - then actually used in the vehicle - control unit.

For this purpose, further diagnostic EOL commands are necessary, for example, barcode, database solutions or the caching of EOL data in local on the transmission built-in control units - such as in the German patent application with the file number 10 2011 108 750.1 as well as the German Offenlegungsschriften DE 2005 000 888 A1 and DE 10 2007 040 485 A1 set forth - and it creates a Testerprogrammieraufwand and operating effort.

In particular, in the intermediate storage approach, an automatic read-out is also conceivable as an alternative to the tester-controlled readout, similar to the initiation of EOL processes described above, but which may possibly be safety-critical. In addition, special handshake algorithms between fixed gear buffer unit and getriebefernem control unit are necessary for this purpose.

The present invention has for its object to perform the commissioning without tester for the TCU-HCA system in distributed commissioning steps on GW and FW safely, the TCU-HCA system does not have an MM interface, and you completely on "Special -Diagnosebefehle "must be able to do without.

The object is achieved by a method having the features according to claim 1 and a method having the features according to claim 2.

According to the invention, 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 and a first control device for controlling the clutch actuator and for controlling the transmission actuator and a second control device is proposed, wherein the Clutch actuator having a clutch actuator uniquely associated, non-volatile memory area and wherein the first control device has a unique memory area assigned to the first control unit and wherein the second control unit has a memory area uniquely assigned to the second control unit. According to the invention, it is provided that in the presence of a predetermined condition, the second control unit causes by means of a diagnostic command that data from the non-volatile memory area of the clutch actuator are transferred to the memory area of the second control unit, the data are processed in the second control unit, and then by means of a further diagnostic command, the processed data are transferred to the memory area of the first control unit.

The invention also proposes 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 and a first control device for controlling the clutch actuator and for controlling the transmission actuator, wherein the clutch actuator a the Clutch actuator has a uniquely assigned, non-volatile memory area and wherein the first control device has a unique allocation to the first control unit storage area. According to the invention, it is provided that in the presence of a predetermined condition, the first control unit causes by means of a diagnostic command that data from the non-volatile memory area of the clutch actuator in the memory area of the first control device or in a further memory area of the first control device are transmitted.

In a preferred embodiment of the invention, it is provided that the data is processed in the first control unit, and then transferred to the memory area of the first control unit.

In a further preferred embodiment of the invention it is provided that the diagnostic commands are standard diagnostic commands.

In a further preferred embodiment of the invention it is provided that the Data transmission via standard diagnostic commands via a UDS interface.

In a further preferred embodiment of the invention, it is provided that the data transmission takes place by means of standard protocol-independent command sequences.

In a further preferred embodiment of the invention it is provided that the predetermined condition is one of the following conditions:
a predetermined sequence of operations in the vehicle performed by a person or a robot, for example, a person operates the brake or the gear selector lever.
a predetermined signal of an external tester, which is detected by a predetermined controller

Detection of initial voltage to a given controller or expiration of a predetermined period of time after first detection of voltage at a given controller, wherein the predetermined controller is preferably the data transmission causing controller.

In a further preferred embodiment of the invention, it is provided that data is transmitted from the non-volatile memory area of the clutch actuator as well as from the non-volatile memory area of a further clutch actuator, or data from several or all transmission-fixed control devices and / or actuators that a non-volatile Memory area are transmitted, if the data is divided into several memories.

In a further preferred embodiment of the invention, it is provided that the control unit initiating the data transmission controls the further control of the startup.

In a further preferred embodiment of the invention, it is provided that the first control unit is the transmission control unit TCU for controlling the clutch actuator and for controlling the transmission actuator and / or the second control unit is the engine control unit for controlling the drive unit.

In this way, the EOL processes can be simplified, eliminating the vehicle tester, also can be completely dispensed with special diagnostic commands and a high level of security against error operation.

Further advantages and advantageous embodiments of the invention are the subject of the following figures and their description.

They show in detail:

1 schematic situation in the vehicle or vehicle plant.

2 schematic situation in the gearbox or on the test bench.

3 schematically read out parameters stored on the test bench and stored in test stand-fixed TCU and store them in the gearbox-fixed HCA

4 schematically: parameter data according to the prior art by means of external tester
read from HCA and transferred to TCU.

5 schematically an embodiment of the invention: Parameter data read by external tester from HCA and transmitted to TCU.

The solution was developed for a TCU-HCA system. This gets its setpoints from a parent drive train control unit. The TCU-HCA system changes gears independently via a gear interface and controls the desired clutch torque in a controlled manner via a torque interface.

The hydrostatic clutch actuator (HCA) is equipped with a CPU and memory. The HCA communicates with the TCU and receives in normal operation of this example, position requirements for the clutch, which implements the HCA accordingly. Communication takes place via a separate CAN bus, to which only the TCU and the two HCA are connected.

For maintenance and commissioning, the HCAs are equipped with diagnostic services. With these it is possible, among other things, to bring the ECU software up to date. Among other things, download and upload services have been implemented in the HCA.

The download is usually done by an external device (tool) such as a tester, which controls the access to the private CAN and thus the HCA via the TCU and its gateway function. The gateway function of the TCU logically (not physically) connects the HCA to the tester.

Situation in the vehicle or vehicle plant. - This situation is in 1 shown:
The TCU 30 communicates via the vehicle CAN 20 with other control devices such as engine control (ECU) 40 or anti-lock braking system (ABS) 50 , To this bus 20 can also be an external tester 10 be connected and on to this bus 20 connected systems and their functions access. A communication including flashing between testers 10 and HCA 80 . 90 is via the gateway function 70 the TCU 30 possible.

Situation in the gearbox (GW) or on the test bench. - This situation is in 2 shown:
The TCU 30 - with serial software - is in the test 170 installed and thus part of the test bench 180 , The vehicle CAN 20 and / or the missing control devices can be from the test bench 170 be simulated.

The test bench 170 , which replaces an external additional tester, communicates with the TCU via diagnostic commands 30 and over the gateway 70 with the HCA 80 . 90 , Via diagnostic commands to the TCU 30 In particular, learning processes are triggered. The fact that the test bench computer 160 Replacing the external tester for the TCU-HCA system is known and known in the art.

The parameters determined during commissioning in the GW are stored in the test stand-fixed TCU 30 stored, but also from the test bench 170 from the TCU 30 be read out and are thus available for further use.

If the gearbox is now transported to the vehicle plant (FW) after the test run, the parameters that have already been learned must also be transferred to the FW. If, for logistical reasons, the TCU is not transported to the FW with the gearbox, then a solution must be found to make the data available in the FW anyway. This is about barcode, other data transfer methods such as a database or with the in the German patent application with the file number 10 2011 108 750.1 as well as the German Offenlegungsschriften DE 2005 000 888 A1 and DE 10 2007 040 485 A1 described method possible.

This will be explained below 3 briefly shown again to illustrate the understanding of the further improvement.

The test stand during the test run 170 determined and in the test bench fixed TCU 30 stored parameters 150 can from the test bench 170 from the TCU 30 read out by means of a diagnostic command, there - in the test stand 170 - cached 140 and via download command in the gearbox fixed HCA 80 . 90 non-volatile eg in EEPROM 130 get saved. For this purpose must in the HCA 80 . 90 corresponding storage space 130 be provided.

By storing the gearbox-specific parameters in the gearbox-fixed HCA 80 . 90 These can be transported to the vehicle plant without any risk of confusion or handling. In the vehicle plant, the transmission is being brought together with the transmission control unit (TCU) for the first time. It is now the task of the definition of the "new" TCU - which was not present during the learning process in the GW - to perform with the already known from the transmission plant parameters.

In usual applications, as in 4 are shown schematically this data update by diagnostic commands of an external tester 10 triggered and controlled.

With a diagnostic command, the parameter data from the HCA 80 . 90 read out (upload).

Then the parameter data will be in the tester 10 for transmission to the TCU 30 edited.

Then the parameter data is sent to the TCU with another command 30 transmitted (flashed).

In the new, in 5 The solution described is now the data update by commands of an already existing in the ECU network controller - in one embodiment of the invention of the ECU 40 , hereinafter referred to as higher-level control unit - triggered and controlled. Advantageously, this higher-level control unit - that is, in this embodiment, the ECU 40 - Transmission via standard diagnostic commands via the UDS interface. But it is also a standard protocol-independent command sequence conceivable. Instead of the tester 10 according to the above procedure too 4 controls according to this embodiment of the invention, the higher-level control unit - ie the ECU 40 :
With a diagnostic command, the parameter data from the HCA 80 . 130 . 90 read out (upload).

Then the parameter data in the ECU 40 . 140 for transmission to the TCU 30 edited.

Then the parameter data is sent to the TCU with another command 30 transmitted (flashed).

The higher-level control unit - in this embodiment, the ECU 40 - can use various methods to trigger data transfer from HCA 80 . 130 . 90 in the TCU 30 to be activated. This can be:
an MMI, such as the operator-operated brake or selector lever
an external tester, which then only with the higher-level control unit - in this embodiment, the ECU 40 - communicates
For example, a time trigger for the first time voltage to a control unit - for example, the parent control unit - in this embodiment, the ECU 40 ,

• 1) den Entfall des Fahrzeugwerk-Testers
• 2) eine sehr hohe Sicherheit gegen Fehlerbedienung – insbesondere bei Aktivierung über b) bzw. a). Automatische Routinen zwischen HCA und TCU, wie Update, wenn TCU nicht bedatet ist, könnten fehlerhaft im Fahrzeugbetrieb ausgelöst werden.
• 3) dadurch keinen Mehraufwand in HCA und TCU, da vorhandene Diagnosebefehle zur Kommunikation genutzt werden können. Im HCA-TCU-Verbund müssen weniger Kombinationen entwickelt und getestet werden. Bei geschickter Architektur können die notwendigen ECU-Ansteuerungs- und Verarbeitungsbefehle direkt aus dem Werkstatttester übertragen werden.

The proposed solution is characterized by:

• 1) the elimination of the vehicle factory tester
• 2) a very high level of security against fault handling - especially when activated via b) or a). Automatic routines between HCA and TCU, such as update, when TCU is not fed, could be triggered erroneously in vehicle operation.
• 3) Thereby no additional effort in HCA and TCU, since existing diagnostic commands can be used for communication. In the HCA-TCU compound, fewer combinations need to be developed and tested. With skillful architecture, the necessary ECU drive and processing commands can be transferred directly from the shop tester.

The higher-level control unit - outside of the TCU-HCA network - can be used not only for the controller of the data transfer between HCA and TCU but also for the further control of commissioning in the vehicle plant.

If the memory requirements of the TCU parameters are greater than the memory available in an HCA for this purpose, the parameters can be divided among all transmission-fixed control units. In the embodiment according to 5 this would be the split between the two HCAs HCA1 and HCA2. The diagnostic commands for storage in the HCAs and for reading out of the HCAs are then to be executed several times.

In a further exemplary embodiment of the invention, it is provided that the TCU is the higher-level control device. In this case, the download function and upload function are implemented in the TCU. Instead of the download / upload function you can also choose other diagnostic services.

The upload mechanism is therefore even stored in the TCU. The TCU recognizes the need for an upload based on certain signals described above and / or boundary conditions and performs this. This is security appropriately secured, so this is not done, for example, in the current driving, etc.

By using an existing control unit in the control unit, which is equipped for example with MMI, to specify diagnostic commands, it is possible to dispense with an otherwise necessary diagnostic tester in the vehicle plant

LIST OF REFERENCE NUMBERS

10

 External tester

20

 Vehicle CAN

30

TCU

40

 ECU

50

 SECTION

60

 Private CAN

70

 gateway

80

 HCA1

90

 HCA2

100

 gear actuator

110

 transmission

120

 RAM

130

 EEPROM / Flash memory

140

 caching

150

 Learned parameters

160

 Test stand PC

170

 test bench

180

 TCU is part of the test bench

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008023360 A1 [0005]
• DE 102010047801 [0006]
• DE 102010047800 [0006]
• DE 102011108750 [0017, 0048]
• DE 2005000888 A1 [0017, 0048]
• DE 102007040485 A1 [0017, 0048]

Claims (10)

Method for commissioning a vehicle transmission ( 110 ) with a gear actuator for actuating the vehicle transmission ( 110 ) and / or commissioning a vehicle clutch with a clutch actuator ( 80 . 90 ) for actuating the vehicle clutch and a first control unit ( 30 ) for controlling the clutch actuator ( 80 . 90 ) and for controlling the gear actuator and a second control device ( 40 ), wherein the clutch actuator ( 80 . 90 ) a the clutch actuator ( 80 . 90 ) a uniquely assigned, non-volatile storage area ( 130 ) and wherein the first control unit ( 30 ) a the first control unit ( 30 ) a uniquely assigned memory area ( 120 ) and wherein the second control device ( 40 ) a the second control unit ( 40 ) a uniquely assigned memory area ( 140 ) characterized in that in the presence of a predetermined condition, the second control device ( 40 ) by means of a diagnostic command that data from the non-volatile memory area ( 130 ) of the clutch actuator ( 80 . 90 ) into the memory area ( 140 ) of the second control device ( 40 ), the data in the second control device ( 40 ), and then by means of another diagnostic command the processed data in the memory area ( 120 ) of the first controller ( 30 ) be transmitted. Method for commissioning a vehicle transmission ( 110 ) with a gear actuator for actuating the vehicle transmission ( 110 ) and / or commissioning a vehicle clutch with a clutch actuator ( 80 . 90 ) for actuating the vehicle clutch and a first control unit ( 30 ) for controlling the clutch actuator ( 80 . 90 ) and for controlling the gear actuator, wherein the clutch actuator ( 80 . 90 ) a the clutch actuator ( 80 . 90 ) a uniquely assigned, non-volatile storage area ( 130 ) and wherein the first control unit ( 30 ) a the first control unit ( 30 ) a uniquely assigned memory area ( 120 ), characterized in that in the presence of a predetermined condition, the first control device ( 40 ) by means of a diagnostic command that data from the non-volatile memory area ( 130 ) of the clutch actuator ( 80 . 90 ) into the memory area ( 120 ) of the first controller ( 30 ) or in another memory area of the first control device ( 30 ) be transmitted. Method according to Claim 2, characterized in that the data in the first control device ( 30 ) and then into the memory area ( 120 ) of the first controller ( 30 ) be transmitted. Method according to one of the preceding claims, characterized in that the diagnostic commands are standard diagnostic commands. Method according to one of the preceding claims, characterized in that the data transmission takes place by means of standard diagnostic commands via a UDS interface. Method according to one of the preceding claims, characterized in that the data transmission takes place by means of standard protocol-independent command sequences. Method according to one of the preceding claims, characterized in that the predetermined condition is one of the following conditions: • a predetermined sequence of actuations in the vehicle carried out by a person or a robot • a predetermined signal from an external tester ( 10 ), which is detected by a predetermined control unit • Detection of initial voltage to a given controller or expiration of a predetermined period of time after the first detection of voltage at a given controller, the predetermined controller is preferably the data transmission causing controller. Method according to one of the preceding claims, characterized in that data from the non-volatile memory area ( 130 ) of the clutch actuator ( 80 . 90 ) as well as from the non-volatile memory area of another clutch actuator ( 80 . 90 ), or data from several or all transmission-fixed control devices and / or actuators having a non-volatile memory area are transmitted, if the data is distributed over several memories. Method according to one of the preceding claims, characterized in that the, the data transmission inducing control unit controls the further control of the commissioning. Method according to one of the preceding claims, characterized in that the first control device ( 30 ) the TCU TCU ( 30 ) for controlling the clutch actuator ( 80 . 90 ) and for controlling the gear actuator and / or the second control device ( 40 ) the engine control unit ( 40 ) is to control the drive unit.

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