WO2007107682A1 - Composant de connecteur pour faisceau de fils de véhicule comprenant une passerelle - Google Patents

Composant de connecteur pour faisceau de fils de véhicule comprenant une passerelle Download PDF

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Publication number
WO2007107682A1
WO2007107682A1 PCT/GB2006/000962 GB2006000962W WO2007107682A1 WO 2007107682 A1 WO2007107682 A1 WO 2007107682A1 GB 2006000962 W GB2006000962 W GB 2006000962W WO 2007107682 A1 WO2007107682 A1 WO 2007107682A1
Authority
WO
WIPO (PCT)
Prior art keywords
connector
gateway
connector component
vehicle
diagnostic
Prior art date
Application number
PCT/GB2006/000962
Other languages
English (en)
Inventor
John Roberts
Original Assignee
P-Tec Automotive Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by P-Tec Automotive Limited filed Critical P-Tec Automotive Limited
Priority to PCT/GB2006/000962 priority Critical patent/WO2007107682A1/fr
Publication of WO2007107682A1 publication Critical patent/WO2007107682A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers

Definitions

  • This invention relates to a data interface. It has particular, but not exclusive, application for use in a vehicle, in particular a motor road vehicle.
  • Automotive vehicle original equipment manufacturers rely increasingly on electronic networks as the communications medium between in-vehicle electronic control units (ECUs).
  • ECUs electronice control units
  • CAN Controller Area Network
  • the CAN protocol has also found applications in the marine sector.
  • the CAN is electrically connected to the diagnostic connector on the interior of the vehicle and therefore the connected ECUs are vulnerable to damage from electrostatic discharge (ESD). This can cause disruption of the electrical functions of the vehicle and permanent damage requiring the replacement of one or more ECUs. Also, all data on the CAN is accessible at the diagnostic connector, so any OEM-proprietary network data can be readily monitored. This type of access could benefit non-approved service organizations attempting to gain reverse-engineer the vehicle to develop an understanding of its operation or car thieves attempting to circumvent security systems.
  • An aim of this invention is to provide controlled access to a vehicle data bus for diagnostic equipment, while avoiding or mitigating these disadvantages.
  • this invention provides a connector component for a vehicle wiring harness, the connector component including a diagnostic connector that has an external interface to which diagnostic apparatus can be connected, an internal interface that connects to a data bus, and an integral gateway that operates to restrict interchange of signals between the external interface and the internal interface.
  • At least one signal is passed between the external interface and the internal interface without restriction by the gateway.
  • signals are typically those that present no security risk nor that are connected to sensitive components.
  • Those signals that are restricted by the gateway may be processed such that: those that fall within a definition set forth by one or more rules are allowed to pass and other signals are not allowed to pass.
  • the gateway may include an isolating link that includes no electrically conductive path.
  • the isolating link includes one or more of an optical link or a radio-frequency link. This arrangement can protect the vehicle control modules from high voltages or high currents applied to the external interface.
  • the external interface of the connector is a diagnostic interface that conforms to ISO-15765.
  • the connector may include a power supply stage to supply power to the gateway. Most advantageously, such a power supply stage draws power from the vehicle wiring harness.
  • a connector embodying the invention is typically suitable for use in a motor road vehicle.
  • the internal interface typically is connected to a CAN bus.
  • this invention provides a wiring harness for a vehicle that includes a diagnostic connector according to the first aspect of the invention.
  • Figure 1 shows diagrammatieaUy a communication path for normal vehicle network network communication in a control network of a vehicle
  • Figure 2 shows diagrammatieaUy a communication path for emissions-relevant diagnosis in the network of Figure 1 ;
  • Figure 3 shows diagrammatieaUy a control network of a vehicle embodying the invention
  • Figure 4 shows in greater detail a diagnostic connector of the control network of Figure Figure 5 is a block diagram that shows the logical components of a gateway module of the connector of Figure 4;
  • Figure 6 is a diagram illustrating implementation of the invention using a processing unit.
  • a vehicle control network comprises several electronic control units 10 (ECUs) that have a function that is relevant to the emissions produced by operation of the vehicle. It also has several ECUs 12 that have a function that is not relevant to the emissions produced by operation of the vehicle.
  • a diagnostic connector 16 is provided, the connector complying with the requirements of ISO- 15765.
  • a data bus 20 which, in this embodiment, is a Controller Area Network (CAN) bus.
  • CAN Controller Area Network
  • any of the ECUs 10, 12 can place data onto the data bus 20.
  • the data is broadcast onto the bus 20, and it is the responsibility of each ECU 10, 12 to determine whether it should react to the data that appears on the bus 20. In this condition, the part of the bus 20' that connects with the diagnostic connector 16 is inactive.
  • the parts of the data bus 20' that are connected to the ECUs 12 that have a function that is not relevant to the emissions produced by operation of the vehicle are inactive.
  • the ECUs 10 that have a function that is relevant to the emissions produced by operation of the vehicle are connected through the data bus 20 to the diagnostic connector 16. Thus, these ECUs 10 can be interrogated through the diagnostic connector 16.
  • a control network embodying the invention is a modification of that shown in Figures 1 and 2.
  • the modification is restricted to the diagnostic connector 16, in that it incorporates a gateway 22.
  • the function of the gateway 22 includes: • receiving diagnostic request messages from a diagnostic tester connected to the diagnostic connector 16 and relaying the requests through the data bus 20 on to the relevant ECUs 10, which will process the requests;
  • the connector 16 has an external interface that comprises several terminals 24, the configuration and function of which is defined by ISO- 15765.
  • the connector 16 additionally has an internal interface that connects it to the wiring harness 26 of the vehicle.
  • the gateway includes the following principal components: a power supply 40, a vehicle network transceiver 42, a vehicle network protocol module 44, a message routing engine 46, a diagnostic network protocol module 48 and a diagnostic network transceiver 50.
  • the power supply 40 is responsible for converting the vehicle power supply into a stable supply for use by the gateway module 22. It performs the functions of voltage filtering to remove unwanted transients, voltage down-conversion to convert the vehicle voltage (nominally 12 V) to the voltage required by the module (typically 5 V or 3.3 V), and current limitation to ensure that the module shuts its power supply down safely in the event of an internal device failure causing excessive power consumption.
  • the network transceivers 42, 50 are responsible for converting the raw electrical signal (i.e. the voltage/current exchanged between ECUs) to logical voltage levels that represent the data exchanged and in the opposite sense, between logical levels and the raw signals.
  • the signalling medium known as the physical layer
  • CAN_H and CAN_L Two signals known as CAN_H and CAN_L.
  • the specifications for these signals can be found from many sources and are well-known to those skilled in the technical field.
  • the network protocol modules 44, 48 converts the logical '1 ' and '0' bit stream into message frames and vice versa.
  • the framing in this example is the CAN protocol defined in ISO-11898.
  • the vehicle network module 44 constitutes the internal interface and the diagnostic network module 48 constitutes the external interface.
  • the message routing engine 46 is responsible for implementing the algorithms to transfer messages from one network onto the other.
  • gateway functions to be passed by the gateway are defined by ISO- 15765.
  • the gateway module In operation, the gateway module must ensure that no data corruption will occur during the translation.
  • the time to translate the message between the networks must be minimized. This is to ensure that the time delay between the diagnostic tester issuing a diagnostic request and reception of the diagnostic response from the target ECU under interrogation (e.g. the engine management ECU) by the tester, occurs within the time limits specified in ISO- 15765 under all possible operating conditions of the powertrain network.
  • the processing unit could be a microcontroller with on-board network protocol peripherals, which implements stages 44, 46 and 48 of Figure 5.
  • the message routing engine would be implemented in software. Rather than a microcontroller, an alternative would be to use a programmable logic array with a "softcore" microprocessor could be used.
  • the network peripherals could be implemented with third-party logic blocks. In both instances the Network Transceivers are provided by standalone hardware.
  • An alternative embodiment uses an external off-board network protocol modules.
  • the processing unit is a microcontroller or a microprocessor that communicates with standalone network protocol modules.
  • the message routing engine is implemented in software.
  • a radio-frequency link could be included in the gateway.
  • the part of the embodiment that connects to the diagnostic connector has no physical connection with the vehicle's network connection, thereby improving the resistance to tampering.
  • the embodiment has been described in terms of a simple network topography in which message translation takes place between an external diagnostic network and a vehicle network. There could be more than one network to and from which the gateway will be responsible for passing messages. While this embodiment has been described as part of a network system that uses the Controller Area Network standard for the OSI Layer 2. However, it has application to network systems that use other Layer 1 and Layer 2 standards. Likewise, it has applicable to other higher-level protocols.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un composant de connecteur pour faisceau de fils de véhicule. Le composant de connecteur comprend un connecteur de diagnostic qui comporte une interface extérieure à laquelle on peut relier un appareil de diagnostic et une interface intérieure qui est reliée à un bus de données. Le connecteur comprend une passerelle intégrale qui fonctionne pour limiter l'échange de signaux entre l'interface extérieure et l'interface intérieure. Au moins un signal passe entre l'interface extérieure et l'interface intérieure sans restriction de la part de la passerelle. De tels signaux sont utilisés à des fins de diagnostic autorisé. On peut traiter les signaux filtrés par la passerelle de telle sorte que ceux qui correspondent à une définition détaillée par une ou plusieurs règles soient autorisés à passer et que les autres signaux ne soient pas autorisés à passer.
PCT/GB2006/000962 2006-03-17 2006-03-17 Composant de connecteur pour faisceau de fils de véhicule comprenant une passerelle WO2007107682A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB2006/000962 WO2007107682A1 (fr) 2006-03-17 2006-03-17 Composant de connecteur pour faisceau de fils de véhicule comprenant une passerelle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2006/000962 WO2007107682A1 (fr) 2006-03-17 2006-03-17 Composant de connecteur pour faisceau de fils de véhicule comprenant une passerelle

Publications (1)

Publication Number Publication Date
WO2007107682A1 true WO2007107682A1 (fr) 2007-09-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/000962 WO2007107682A1 (fr) 2006-03-17 2006-03-17 Composant de connecteur pour faisceau de fils de véhicule comprenant une passerelle

Country Status (1)

Country Link
WO (1) WO2007107682A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013013567A1 (de) 2013-08-14 2015-02-19 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Verbinder für ein Bussystem eines Kraftfahrzeugs mit Gateway und Bussystem für ein Kraftfahrzeug
IT201600109368A1 (it) * 2016-10-28 2018-04-28 Magneti Marelli Spa "Dispositivo di protezione da attacchi informatici al veicolo tramite connettore diagnostico e corrispondente procedimento"

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19880227C2 (de) * 1997-02-17 2001-02-01 Mecel Ab Aamaal Schutzvorrichtung für Fehlererkennungs-Anschlüsse in verzweigten Computernetzen
EP1530182A1 (fr) * 2001-11-15 2005-05-11 Bell Canada Surveillance et commande à distance d'un véhicule à moteur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19880227C2 (de) * 1997-02-17 2001-02-01 Mecel Ab Aamaal Schutzvorrichtung für Fehlererkennungs-Anschlüsse in verzweigten Computernetzen
EP1530182A1 (fr) * 2001-11-15 2005-05-11 Bell Canada Surveillance et commande à distance d'un véhicule à moteur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013013567A1 (de) 2013-08-14 2015-02-19 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Verbinder für ein Bussystem eines Kraftfahrzeugs mit Gateway und Bussystem für ein Kraftfahrzeug
IT201600109368A1 (it) * 2016-10-28 2018-04-28 Magneti Marelli Spa "Dispositivo di protezione da attacchi informatici al veicolo tramite connettore diagnostico e corrispondente procedimento"
EP3316524A1 (fr) * 2016-10-28 2018-05-02 Magneti Marelli S.p.A. Procédé et dispositif de protection de cyber attaques contre une automobile grâce à un connecteur de diagnostic

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