DE102013211772A1 - Method and device for exchanging data in a motor vehicle for operating an actuator, preferably an automated friction clutch and / or an automated transmission - Google Patents

Abstract

The invention relates to a method for exchanging data in a motor vehicle for operating an actuator, preferably an automated friction clutch and / or an automated transmission, in which data is exchanged with at least two actuators comprising one control unit with an external test unit, wherein for detection the control unit an identification code is used. In a method which permits fast and nevertheless highly accurate data transmission, the test unit activates the first control unit of the first actuator with a first request identification code, whereupon the first control unit of the first actor sends a first response when the correct request identification code of the test unit is transmitted. Identification code responds and the test unit responds to the second control unit of the second actuator with a second request identification code, after which, when the second control unit addresses it correctly, it sends a second response identification code to the test unit.

Description

The invention relates to a method for exchanging data in a motor vehicle for operating an actuator, preferably an automated friction clutch and / or an automated transmission, in which data is exchanged with at least two actuators comprising one control unit with an external test unit, wherein for detection the control unit an identification code is used and an apparatus for performing the method.

In motor vehicles actuators are used, which are designed for example as an automated transmission or an automated friction clutch. In this context, a hydrostatically operated actuator (HCA - Hydrostatic Clutch Actuator) is often used in this context, as he used for an automated friction clutch, for example in the DE 10 2010 047 801 A1 is disclosed. Depending on the design, such clutch and / or transmission systems have one or more decentralized control units, such a decentralized control unit being arranged in each case directly on an electromechanical actuator of the actuator. For storing an application software, a memory unit is present in each control unit, which is preferably designed as a flash memory. Due to updates of entire model series or the elimination of errors, an update of the stored in the memory unit of the control unit application software may be necessary.

Particularly in the case of dual-clutch systems, where usually each clutch forms an actuator with a decentralized control unit, the same application software is stored in each of the two control units for reasons of simplification, which must also be updated in both control units of the dual-clutch system in the event of a software update. The process of updating the application software in the memory unit of the respective control unit, referred to as a flash process, is initiated by an external test unit. The data emitted by the test unit data are transmitted via a CAN bus to the control units, in each case a CAN identification for sending the data and a CAN identification for a feedback of the control units are used.

In 1 a system structure of a dual clutch system is shown. The control unit 1 the first clutch and the control unit 2 the second clutch are via a separate CAN bus 3 with a gearbox control unit 4 connected via a vehicle CAN bus 5 to the external test unit 6 connected. To transfer a new version of an application software, as in 2 represented, the control unit 2 the second clutch of the transmission control unit 4 separated. The test unit 6 sends a command via the vehicle CAN bus 5 to the transmission control unit 4 which sends this command to the first control unit 1 forwards. When sending the command is from the external test unit 6 used a previously defined CAN identifier, for example 0x7F1. The CAN identifier 0x7F1 gives the control unit 1 known that an update of the application software should be made. The control unit 1 The first clutch responds accordingly with a second, likewise previously defined CAN identification, for example 0 × 7F9. After the updated application software into the control unit 1 the first clutch is transmitted, the second control unit 2 again with the gearbox control unit 4 contacted.

According to 3 then becomes the first control unit 1 the first clutch of the transmission control unit 4 separated. With the same CAN identification 0 × 7F1, as with the transmission of the new application software into the first control unit 1 the first clutch was used, now becomes the second control unit 2 announced that an updated application software in the second control unit 2 to be transmitted to the second clutch. Also in this case confirms the second control unit 2 with the same second CAN identification 0x7F9 that they command the test unit 6 had received. Upon completion of this transfer, the control unit 1 the first clutch again with the transmission control unit 4 connected. Now both are control units 1 and 2 The two clutches are provided with the updated application software and are both to the operation of the clutch and transmission system again with the transmission control unit 4 connected. Through this procedure, although collisions and errors during data transfer between the control units 1 and 2 and the external test unit 6 prevented, however, is the de- or contacting the control units 1 and 2 very time consuming.

The invention is therefore based on the object of specifying a method for exchanging data in a motor vehicle for operating an actuator, which allows a fast but reliable data transmission.

According to the invention, the object is achieved in that the test unit activates the first control unit of the first actuator with a first request identification code, whereupon the first control unit of the first actor of the test unit responds with a first response identification code and / or the test unit replies the second control unit of the second Actuator responds with a second request identification code, after which the second control unit sends a second response identification code to the test unit. This has the advantage that integration of new software functionality in both control units of the two actuators can be done without time-consuming decontacting and re-contacting the control units. In addition, a simultaneous transfer of the software in both control units of the two actuators is possible. The use of different request identification codes or response identification codes for the two control units prevents errors and collisions from occurring due to individual tolerances in the time sequences and possibly different responses. This ensures that a reliable transmission and storage of the updated software can be realized very quickly.

Advantageously, the request identification code and the response identification code are formed from an identifier of the actuator, which is read after the manufacture of the actuator at the end of the tape in the control unit of the actuator. By using the identifier of the actuator, for example a serial number, the request identification code and the response identification code can always be clearly assigned to the corresponding actuator and the associated control unit.

In one embodiment, the request identification code and the response identification code respectively correspond to a CAN identification used to announce the transfer of new software to the control unit. These CAN identifications are used in the transmission of the updated software from the test unit to the control unit of the actuator via a communication link designed as a CAN bus and used exclusively only for the announcement and storage of the new software. In this case, the control unit is indicated by the transmission of the request identification code that an update of the software stored in the control unit is to be made. The respective control unit confirms the receipt of the correct request identification code with the transmission of the corresponding response identification code.

In one variant, an external test unit triggers the storage of the software in the control unit and / or executes them and / or monitors the correct execution. As a result, it is possible to dispense with additional monitoring units, which reduces the costs for carrying out the method.

A development of the invention relates to a device for exchanging data in a motor vehicle for operating an actuator, preferably an automated friction clutch and / or an automated transmission, with at least two actuators, each comprising a control unit, which are connectable to an external test unit, each Control unit comprises a non-volatile memory unit in which an identification code of the control unit is stored. In a device in which a very fast, yet reliable data transmission into the non-volatile memory unit of the control unit is possible, a first request identification code and a first response identification code are stored in the non-volatile memory unit of the first control unit of the first actuator, while the non-volatile memory unit of the second control unit of the second actuator includes a second request identification code and a second response identification code, wherein the test unit activates the first control unit of the first actuator with a first request identification code, whereupon the first control unit of the first actuator of Test unit responds with a first response identification code and / or the test unit responds to the second control unit of the second actuator with a second request identification code, after which the second control unit a second response identification code to the testein unit sends. This ensures that it is clearly assignable in which control unit the data to be newly written is to be stored. A Dekontaktierung one of the control units during the data transfer to the other control unit can be dispensed with. In addition, there is the advantage that upon transmission of both the first and the second request identification code to the control units, the software update can be carried out simultaneously in both control units of the first and the second actuator.

Advantageously, the first and second control units of the first and second actuators are connected to the test unit via a vehicle communication link. By using the vehicle communication link, the external test unit is directly connected to both the first and the second control unit of the first and the second actuator, so that additional expenses for electrical lines and components can be omitted, resulting in a particularly cost-effective and simple Device leads.

Alternatively, the test unit is connected via the vehicle communication link to a control unit, which is connected via a separate communication line with the first control unit of the first actuator and with the second control unit of the second actuator. The use of the separate communication line is particularly advantageous if there is a high utilization for the vehicle communication link. By using the separate communication line between the first Control unit or the second control unit and the control unit transmission times are shortened. The transmission of data from the test unit to the two control units of the two actuators takes place quickly and reliably despite high utilization of the vehicle communication link.

In one embodiment, the controller comprises a gateway function. By means of this gateway function, the commands issued by the test unit are passed through the control unit unchanged and forwarded to the first or second control unit of the first or second actuator.

In one variant, the vehicle communication link and / or the separate communication line are designed as a CAN bus. The use of CAN buses is common in motor vehicles. This makes it possible to dispense with the programming of other communication links, which simplifies the formation of data lines within the motor vehicle.

In a further embodiment, the control unit as a transmission control unit and / or the first control unit as a first clutch control unit and / or the second control unit are designed as a second clutch control unit. In this embodiment, transmission of updated software in a transmission system with a dual-clutch system is easy to perform.

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

Show it:

1 FIG. 1 shows a system structure of a transmission system with a prior art dual clutch system. FIG

2 : a system structure of the transmission system after 1 for transmitting updated software into a first control unit

3 : a system structure for a transmission system after 1 for transmitting updated software to a second control unit

4 A transmission system for simultaneously transmitting software into a first control unit and into a second control unit.

Identical features are identified by the same reference numerals.

4 shows a representation of the arrangement of the control devices of a transmission system, which is a parent of a clutch system. The coupling system is designed as a double-clutch system and has two actuators, each actuator having an automated clutch to which a control unit for driving an electromechanical drive unit of the clutch is provided. Thus, at the first, not shown clutch, the control unit 1 arranged, while at the second, also not further shown, the control unit 2 is attached. These control units 1 . 2 are via a separate, designed as a CAN bus communication line 3 with a gearbox control unit 4 connected. The transmission control unit 4 in turn is connected to a vehicle communication link 5 , which is also designed as a CAN bus, with an external test unit 6 connected. The external test unit 6 engages in a diagnostic interface 9 of the gearbox control unit 4 one. The transmission control unit 4 includes a gateway function that allows the commands of the external test unit 6 through the gearbox control unit 4 through the separate communication line 3 on the two control units 1 and 2 to pass through the first and the second clutch.

The first control unit 1 has a first non-volatile storage unit 7 and the second control unit 2 has a second non-volatile storage unit 8th on. 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 thus available again after power has been restored to the memory unit. Examples of such non-volatile memory units are EEPROMs.

In the first non-volatile storage unit 7 the first control unit 1 are stored as a CAN identification serving first request identification code IDF1 and a first response identification code IDW1. In the second non-volatile storage unit 8th are stored a second request identification code IDF2 and a second response identification code IDW2, which also serve as CAN identifications. As an example, for the first control unit 1 as the request identification code IDF1 = 0 × 7F1 while using as the response identification code IDW1 = 0 × 7F9. The second control unit 2 used as the request identification code IDF2 = 0 × 7F2 and as the response identification code IDW2 = 0 × 7FA.

The first and second request identification codes IDF1, IDF2 and the first and second response identification codes IDW1, IDW2 are used exclusively to the control units 1 . 2 announce that an updated application software in the first and the second non-volatile storage unit 7 . 8th to be transferred. The application software, which in the two control units 1 . 2 is used, is identical, so that for both control units 1 . 2 the same software package is transferred. Such an update of the application software is necessary, for example, when troubleshooting the stored data or an annual update of entire model series of a transmission system.

Both the first and the second control unit 1 . 2 have their own identifier, which at the end of the tape in the production of the dual clutch system in the respective non-volatile memory unit 7 . 8th the first and second control unit 1 . 2 is enrolled. Based on this first and second identifier of the first and second control unit 1 . 2 is respectively a request identification code IDF1, IDF2 and response identification code IDW1, IDW2 for the CAN identification of each control unit 1 . 2 generated for flashing, ie the transfer of the updated application software in the non-volatile storage units 7 . 8th , is being used. By using the two, for each control unit 1 . 2 Different identifiers have each of the two control units 1 . 2 own CAN identifications for the announcement of the transmission of the updated application software by the test unit 6 as well as for the feedback by the tax units 1 . 2 ,

To transfer updated application software to non-volatile storage devices 7 . 8th the first control unit 1 and the second control unit 2 the first and second clutch becomes the external test unit 6 to the diagnostic interface 9 of the gearbox control unit 4 connected. The test unit 6 sends the request identification codes IDF1 = 0 × 7F1 and IDF2 = 0 × 7F2 via the vehicle communication link designed as a CAN bus 5 to the transmission control unit 4 , The transmission control unit 4 directs via the separate communication line due to its own gateway functionality 3 the request identification codes 0x7F1, 0x7F2 to the first and second control units 1 . 2 further. Each of the control units 1 . 2 compares the received request identification codes IDF1, IDF2 with that in their storage unit 7 . 8th stored request identification code IDF1, IDF2 and recognizes in accordance with the received request identification code IDF1, IDF2 with the stored request identification code IDF1, IDF2 that an update of the application software in the respective non-volatile memory unit 7 . 8th to be executed. After this identification, the first control unit sends 1 a response identification code IDW1 = 0 × 7F9 to the test unit 6 while the second control unit 2 as response identification code IDW2 = 0 × 7FA. Upon receipt of these response identification codes IDW1, IDW2, the test unit knows 6 that transfer the updated application software to the two control units 1 . 2 can be done. The exchange of the request identification codes 0x7F1, 0x7F2 and the response identification codes 0xF79, 0xF7A is in 4 illustrated by the arrows P1 and P2.

Due to the statements made, a transmission system comprising a dual-clutch system can save time-consuming contacting or decontacting processes when transmitting updated application software. In addition, there is the possibility of both control units 1 . 2 simultaneously with the updated application software. This results in a very fast transfer of the updated application software in both the first and in the second control unit 1 . 2 the first and the second clutch possible, the data still reliably transmitted and errors are prevented.

LIST OF REFERENCE NUMBERS

1

 control unit

2

 control unit

3

 Separate communication line

4

 Transmission Control Module

5

 Vehicle communication link

6

 test unit

7

 Non-volatile storage unit

8th

 Non-volatile storage unit

9

 Diagnostic interface

P1

 arrow

P2

 arrow

IDF1

 first request identification code

IDF2

 second request identification code

IDW1

 first answer identification code

IDW2

 second answer identification code

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 102010047801 A1 [0002]

Claims (10)

Method for exchanging data in a motor vehicle for operating an actuator, preferably an automated friction clutch and / or an automated transmission, in which between at least two, in each case one control unit ( 1 . 2 ) actuators data with an external test unit ( 6 ), whereby the recognition of the control unit ( 1 . 2 ) an identification code is used, characterized in that the test unit ( 6 ) the first control unit ( 1 ) of the first actuator with a first request identification code (IDF1) is activated, whereupon the first control unit ( 1 ) of the first actor of the test unit ( 6 ) responds with a first response identification code (IDW1) and / or the test unit ( 6 ) the second control unit ( 2 ) of the second actuator is responsive to a second request identification code (IDF2), after which the second control unit ( 2 ) a second response identification code (IDW2) to the test unit ( 6 ) sends. A method according to claim 1, characterized in that the request identification code (IDF1, IDF2) and the response identification code (IDW1, IDW2) are formed from an identifier of the actuator, which after the production of the actuator at the tape end in the control unit ( 1 . 2 ) of the actuator is read. Method according to Claim 1 or 2, characterized in that the request identification code (IDF1, IDF2) and the response identification code (IDW1, IDW2) respectively correspond to a CAN identification which is used to announce a transfer of software into the control unit ( 1 . 2 ) be used. Method according to claim 1, characterized in that the external test unit ( 6 ) the storage of the software in the control unit ( 1 . 2 ) and / or performs and / or monitors the correct execution. Device for exchanging data in a motor vehicle for operating an actuator, preferably an automated friction clutch and / or an automated transmission, with at least two, in each case one control unit ( 1 . 2 ) comprehensive actuators interfaced with an external test unit ( 6 ), each control unit ( 1 . 2 ) a non-volatile memory unit ( 7 . 8th ) in which an identification code (IDF1, IDF2) of the control unit ( 1 . 2 ), characterized in that in the non-volatile memory unit ( 7 ) of the first control unit ( 1 ) of the first actuator a first request identification code (IDF1) and a first response identification code (IDW1) are stored, while the non-volatile memory unit ( 8th ) of the second control unit ( 2 ) of the second actuator includes a second request identification code (IDF2) and a second response identification code (IDW2), wherein the test unit ( 6 ) the first control unit ( 1 ) of the first actuator with a first request identification code (IDF1) is activated, whereupon the first control unit ( 1 ) of the first actor of the test unit ( 6 ) responds with a first response identification code (IDW1) and / or the test unit ( 6 ) the second control unit ( 2 ) of the second actuator is responsive to a second request identification code (IDF2), after which the second control unit ( 2 ) a second response identification code (IDW2) to the test unit ( 6 ) sends. Apparatus according to claim 5, characterized in that the first and the second control unit ( 1 . 2 ) of the first and the second actuator via a vehicle communication link ( 5 ) with the test unit ( 6 ) are connected. Device according to claim 5, characterized in that the test unit ( 6 ) via the vehicle communication link ( 5 ) with a control device ( 4 ), which is connected via a separate communication line ( 3 ) with the first control unit ( 1 ) of the first actuator and the second control unit ( 2 ) of the second actuator is connected. Apparatus according to claim 7, characterized in that the control unit ( 4 ) comprises a gateway function. Device according to claim 6 or 7, characterized in that the vehicle communication link ( 5 ) and / or the separate communication line ( 3 ) are designed as a CAN bus. Device according to at least one of the preceding claims, characterized in that the control unit as a transmission control unit ( 4 ) and / or the first control unit ( 1 ) as the first clutch control unit and / or the second control unit ( 2 ) are formed as a second clutch control unit.

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