WO2002084575A1

WO2002084575A1 - Method and device for providing a motor vehicle with data

Info

Publication number: WO2002084575A1
Application number: PCT/EP2002/003651
Authority: WO
Inventors: Bernhard Giers; Peter Lauer
Original assignee: Continental Teves Ag & Co. Ohg
Priority date: 2001-04-17
Filing date: 2002-04-03
Publication date: 2002-10-24

Abstract

The invention relates to a method for providing a motor vehicle with data, especially component data such as tyre data, data records, characteristic data or similar, in order to operate a regulated braking system or another automotive regulating or control system. In order to improve control or regulation, the following steps are disclosed in a chronological sequence: a) the component (2,3,4,5), especially a tyre, is initialised or identified inside said vehicle with the aid of a transponder system (6,7,8,9,10); b) a characteristic of the component is stored inside the vehicle; c) the component characteristic is transferred to a fixed data memory (20) by wireless transmission and component data associated with the component characteristic is read out of the data memory (20); d) the component data is transferred to the vehicle by wireless transmission and the component data, data records, characteristic data or similar are stored inside the vehicle.

Description

Method for supplying a motor vehicle with data

The invention relates to a method for supplying a motor vehicle with data, in particular with component data such as tire data, data sets, maps or the like, for operating a regulated brake system or another motor vehicle regulation or control system. An apparatus for performing the method is also part of the invention.

Electronic regulation and control systems make up a large part of a vehicle's value creation process. The function of such systems is essentially based on computer-implementable data processing programs for performing calculations, which include component-specific data. In known methods, data and programs are stored locally in a fundamentally limited memory, for example an EEPROM. This process takes place as part of the production of the vehicle. In an authorized specialist workshop, the data can be recoded in a so-called diagnostic mode if, for example, a spare part with other data has been installed.

The process of updating the data can be improved. Because it cannot be completely ruled out that the recoding of the data, for example out of ignorance, in the absence of authorization or against better knowledge, may fail or be carried out incorrectly. As a result, calculations are carried out with incorrect data, which at least leads to a functional impairment.

It is also known that tires from different manufacturers - under otherwise identical conditions such as vehicle and environmental conditions (test track, weather) - have significantly different driving and braking performance. The cause is the transferable friction force at a given wheel contact force. The

Relationship can be documented using so-called μ-slip curves be animals. Depending on the tire properties, the μ-slip curve has a largely flat course, for example, or has a clear peak in the area of a maximum coefficient of friction. This has had a major impact on the regulation. Known procedures do not allow the consideration or storage of a large number of tire data.

DE 198 52 814 Al a method and an apparatus for supplying motor vehicles with da ta ^'or to take for data exchange. A data transmission is to be carried out while the vehicle is being refueled. For this purpose, a data transmission device is implemented in the refueling route. The process is considered inflexible.

DE 198 53 000 AI shows a method for supplying a motor vehicle with data. The data transmission between a transceiver of a vehicle and a control center is to be carried out using wireless data transmission devices.

DE 199 34 145 C2 describes a method for establishing communication connections between a first communication terminal device and a vehicle-side communication terminal device using a vehicle registration number register.

According to the invention, the object is achieved by the method steps

a. vehicle-side initialization or identification of a component, in particular a tire, using a transponder system, b. vehicle-side storage of a component identifier, c. wireless transmission of the component identifier to a fixed data memory and reading component data associated with the component identifier from the data memory, and d. wireless transmission of the component data to the vehicle and on-board storage of the read component data, data records, maps or the like.

The invention enables automated updating of component-specific data. The invention also allows the function of a motor vehicle control system, in particular a brake control system, to be automatically matched to the components used, preferably the tires, without having to carry out a separate recoding process. The recoding cannot therefore be omitted or carried out incorrectly. Only currently valid data are kept in the motor vehicle, so that cost-intensive storage space can be saved. For example, it is not necessary to save the data of all tires on the vehicle, the assembly of which is generally permitted.

If the component identifiers and component data, data records, characteristic diagrams or the like stored in the data memory are updated at predetermined time intervals, in particular periodically, it is ensured that there is always valid data there. Component aging is possible.

It is advantageous if the data storage identifiers also new component and _^ associated component data, records, maps and the like are added more. This enables not only essentially identical components, but also improved components or tires with changed data to be centrally and centrally recorded, managed and made available to vehicles in the field. The initialization or identification of components, such as tires, is carried out automatically on a regular basis or on the basis of recurring events, in particular the start of an ignition run. This ensures that the data of components currently mounted on or in the vehicle are stored in the vehicle-side memory.

If the component identification transmitted by a component during initialization or identification does not match the stored component identification, component data, data records, characteristic diagrams or the like stored on the vehicle are overwritten after the data memory has been read out. Because a lack of agreement of a component identifier is an indication that a component replacement or, for example, a tire change has taken place. The measure mentioned also takes place if the component identifications, component data, data records, characteristic diagrams or the like stored in the data memory have been changed. In other words, the data stored in the vehicle is updated automatically when components or tires have been replaced. A separate recoding is not necessary.

According to an advantageous embodiment of the invention, vehicle-specific data such as the control quality, signal tolerances or the like are also stored in the data memory and subjected to an evaluation. Depending on the evaluation, further steps such as, for example, reading out and storing data on the vehicle side can be initiated. If necessary, information is emitted to the vehicle driver to carry out some specific measure, such as visiting a specialist workshop, or stopping use of the vehicle. An automatic see decommissioning of the vehicle or a decommissioning of certain functions is possible.

A device for carrying out the method also belongs to the invention and comprises at least one component, in particular a tire, a transponder system for identifying or initializing the component and / or for detecting a tire position and / or for capturing tire data, with the transfer of component-specific data wireless communication means are provided between the motor vehicle and a fixed data memory.

Further details of the invention will become apparent from the description with reference to the drawing. The drawing shows highly schematic

Fig. 1 shows a communication device for data transmission, and

Fig. 2 is a flowchart of a data transmission method.

The invention is basically implemented by a wireless communication device with additional elements for the transmission and evaluation of certain vehicle-relevant data as in FIG. 1.

In the drawing, a vehicle-mounted electronic unit 1 with components, in particular electronically addressed components 2, 3, 4, 5 such as pumps, sensors, tires with sensors (such as a side-wall torsion sensor, SWT) is shown in the upper frame which have wireless transmission means such as a transponder system with transponder transceiver 6,7,8,9, which are connected to a transponder receiver / transmitter 10, which in turn with an electronic central unit (ECU) 11 of a control system, ins - special of a brake control system is connected. In general, a plurality of central units can also be provided, which are networked with one another using a bus system (for example CAN). The brake control system has a memory 12 connected to the central unit 11 and can permanently store received data. For example, these are erasable and programmable EEPROMs. The stored information and data can be physical parameters or entire program instructions for the components 2, 3, 4, 5 concerned. The data in the memory 12 can be changed during non-critical operating states, that is to say when the database of the central unit 11 does not have to be accessed and the operational safety and error-free functioning are not endangered. This includes both reading out and reading in new data. If several networked central units are used, they can be electronically coded to ensure unambiguous addressing during data exchange. Transmitting and receiving means 13 are provided for wireless communication of the electronic unit 1 with the data memory 20.

In the lower frame of FIG. 1, a stationary data memory 20 is shown, to which wireless transmission and reception means 21 for communication with an electronics unit 1 of one or more vehicles are assigned. In principle, a wired communication connection 22 can also be interposed. In general, the communication is bidirectional and the connection is established and the data transmission is carried out using a method as described in DE 198 53 000 AI or in another way. Different, generally known, standards can be used for message transmission. In the order in which they are named, mobile radio standards such as GSM (Global System for Mobile Communication), CDPD (Cellular Digital Packet Data), GSM ^ enable 2+, UMTS (Universal Mobile Telecommunications System), HSCSD (High Speed Circuit Switched Data) and GPRS (General Packet Radio Service) each have increased data transmission rates, which is due in particular to radio channel bundling or the simultaneous use of several radio time slots while transmitting individual data packets. To protect against unauthorized use, data transmission is always encrypted. In addition, authentication can precede the data exchange in order to avoid misuse.

Reference is now made to FIG. 2.

After the start, in a first method step A, an initialization or identification of components 2, 3, 4, 5, such as tires, is carried out in the vehicle using a wireless transponder transmitter / receiver 6, 7, 8, 9 and a transponder receiver / Transmitter 10 transmitted component identifier made. This is done regularly, especially on the occasion of recurring events such as the start of an ignition run or at the start of the journey, and automatically. The transmitted component identifier is stored in memory 12 according to B, and the state of the components 2, 3, 4, 5 is diagnosed. In principle, component identification allows type recognition. The component identifier can also allow precise localization - for example, tires at the front right or tires at the rear left - especially if tire pressure monitoring (TPMS) is provided.

In order to read out component data, the component identifier is transmitted wirelessly to a fixed data memory 20 (step C). The component data read from the data memory 20 are then wirelessly transmitted to the vehicle in accordance with step D and stored in the memory 12. Outdated data will be deleted. As a result, current component-specific data is always available in the motor vehicle. The component identifiers and component data, data records, characteristic diagrams or the like stored in the data memory 20 are updated at predetermined time intervals, in particular periodically, by a system administrator. This ensures that there is always valid data that can be accessed by an electronic unit 1. Component aging can be taken into account.

For system maintenance, 20 new component identifiers and associated component data, data records, maps or the like are added to the data memory. This makes it possible to centrally record and manage new components or tires with changed data and make them available to the control system.

If there is no plausibility, the component data, data records, characteristic diagrams or the like stored in the memory 12 are overwritten with the corresponding data of the data memory 20. The plausibility of the data stored in the memory 12 is absent when the ignition cycle of a component transmitted identifier does not match a component in the framework of the initialization at the start with the ^■ in the memory 12 stored component identifier. Because this is an indication that a component replacement or simply a tire change has been made. The measure mentioned also takes place if the component identifications, component data, data records, characteristic diagrams stored in the data memory 20 have been changed for the searched component identification. In other words, the data stored in the vehicle is updated automatically, even if components or tires have been replaced without recoding in the memory.

In one embodiment of the invention, vehicle-specific data such as the control quality, signal tolerances or the like are also stored in the data memory 20 ^. and evaluated. Depending on the evaluation, further steps such as (data storage side) reading and (vehicle side) storage of data can be initiated. If necessary, information is emitted to the vehicle driver to carry out some specific measure, such as visiting a specialist workshop, or stopping the use of the vehicle. An automatic shutdown of the vehicle or a shutdown of certain functions as well as a recall campaign through targeted access to certain vehicles is possible.

LIST OF REFERENCE NUMBERS

1 electronics unit

2 component

3 component

4 component

5 component

6 transponder transmitter / receiver

7 Transponder transmitter / receiver

8 transponder transmitter / receiver

9 Transponder transmitter / receiver

10 transponder receiver / transmitter

11 central processing unit (ECU)

12 memories

13 means of transmission and reception

20 data memories

21 means of transmission and reception

22 wired communication connection

Claims

claims

1. Method for supplying a motor vehicle with data, in particular with component data such as tire data, data records, characteristic diagrams or the like, for operating a regulated brake system or another motor vehicle regulation or control system, characterized by steps a. initializing or identifying a component (2, 3, 4, 5), in particular a tire, on the vehicle side using a transponder system (6, 7, 8, 9, 10), b. vehicle-side storage of a component identifier, c. wireless transmission of the component identifier to a fixed data memory (20) and reading component data associated with the component identifier from the data memory (20), and d. wireless transmission of the component data to the vehicle and on-board storage of the read component data, data records, maps or the like.

2. The method according to claim 1, characterized in that the component identifiers and component data, data records, characteristic diagrams or the like stored in the data memory (20) are updated at predetermined time intervals, in particular periodically.

3. The method according to claim 2, characterized in that the data memory (20) new component identifiers and associated component data, data records, maps or the like are added.

4. The method according to claim 1, characterized in that the initialization or identification of components (2,3,4,5), such as tires, - is carried out regularly, or by recurring events such as, in particular, when starting an ignition run, and that the component data, data records, maps or the like stored on the vehicle are overwritten if the by A component identifier (2, 3, 4, 5) transmitted during initialization or identification does not match the stored component identifier, or if an update of component data, data records, characteristic diagrams or the like stored in the data memory (20) and belonging to a specific component identifier is done.

5. The method according to one or more of the preceding claims, characterized in that vehicle-specific data, such as control quality, signal tolerances or data for characterizing a driver's request on the occasion of certain driving situations, are stored in the data memory (20) and subjected to an evaluation.

6. The method according to claim 5, characterized in that, depending on the evaluation, further steps such as reading out on the data storage side and storing data on the vehicle side are initiated and / or vehicle driver information is emitted.

7. The method according to one or more of the preceding claims, characterized in that the communication between the motor vehicle and the fixed data memory (20) is secured by means of encryption methods and / or authentication methods. Device for carrying out the method according to claim 1, with a motor vehicle regulation or control system, in particular anti-lock, traction slip and / or stability control system, characterized in that at least one component (2, 3, 4, 5), in particular a tire, is a transponder system (6,7,8,9,10) for identifying or initializing and / or acquiring a tire position and / or acquiring tire data, and that for the transmission of component-specific data between the motor vehicle and a fixed data memory (20), wireless communication means (13, 21) are provided.