EP2109083A1 - Unité de contrôle électronique et procédé pour effectuer un diagnostic dans un véhicule - Google Patents

Unité de contrôle électronique et procédé pour effectuer un diagnostic dans un véhicule Download PDF

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Publication number
EP2109083A1
EP2109083A1 EP08103494A EP08103494A EP2109083A1 EP 2109083 A1 EP2109083 A1 EP 2109083A1 EP 08103494 A EP08103494 A EP 08103494A EP 08103494 A EP08103494 A EP 08103494A EP 2109083 A1 EP2109083 A1 EP 2109083A1
Authority
EP
European Patent Office
Prior art keywords
electronic control
vehicle
diagnostic
control unit
mode
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP08103494A
Other languages
German (de)
English (en)
Inventor
Ioannis Liakos
Daniel Hensel
Klaus Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP08103494A priority Critical patent/EP2109083A1/fr
Publication of EP2109083A1 publication Critical patent/EP2109083A1/fr
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0808—Diagnosing performance data

Definitions

  • This invention relates to an electronic control unit and a method of performing diagnosis in a vehicle.
  • US patent number 7,013,241 discloses an electronic control unit comprising two computers and a method of operating the two computers for performing diagnostic operation in a vehicle, wherein the first computer and the second computer have diagnostic means. Further the first computer performs a set of first diagnostic operations through comparison with predetermined values and the second computer performs diagnosis based on the values obtained from the set of first diagnostic operations.
  • the electronic control unit and the method of performing diagnosis of this invention have the following advantages.
  • the activation of a diagnostic mode in the electronic control unit provides better allocation of resources in the electronic control unit.
  • the better allocation of resources helps communicate diagnostic information in a more efficient way.
  • the allocation of resources also facilitates better diagnosis as more resources are available as compared to when the electronic control unit was used in a non-diagnostic mode. Also in the diagnostic mode not all operating functions of the normal mode are performed, the resources of the electronic control units thus can be utilized for communicating diagnostic information. Since more resources are available in the diagnostic mode the diagnosis is faster. Examples for the resources which are utilized more efficiently are the working memory and the processing time of the microcontroller of the electronic control units.
  • the resources are now available for communicating diagnostic information. Since major part of the resources can be utilized the diagnosis can be performed faster and more efficiently.
  • the vehicle components can communicate diagnostic information thus not requiring a testing device to be individually connected to the vehicle components in case multiple faults occur. This reduces the time required for performing diagnosis in the vehicle.
  • the diagnostic program can also be loaded onto the electronic control units and the vehicle components this provides the advantage that additional diagnostic features can be provided in comparison to the diagnostic program stored in the memory.
  • the method of performing diagnosis wherein the electronic control unit is capable of operating in a normal mode and a diagnostic mode provides better allocation of the resources which helps not only in diagnosing faster but also increases the efficiency of the diagnosis.
  • the varied utilization of the working memory in the normal mode and diagnostic mode helps faster communication of the diagnostic information in the diagnostic mode.
  • the varying processing time used by the microcontrollers of the electronic control units in the normal mode and the diagnostic mode allows the electronic control unit to use the microcontroller entirely for the purpose of communicating diagnostic information thus reducing the time required for such communication.
  • Figure 1 illustrates a vehicle in which plurality of electronic control units 10 and vehicle components 12 are connected through a communication network 14 in a vehicle.
  • the connection via the communication network facilitates the electronic control units 10 and the vehicle components 12 to interact with each other.
  • Further Figure 1 shows a testing device 16 which is externally connected to the communication network 14. This connection between the testing device 16 and the communication network 14 allows the testing device 16 to communicate with the electronic control unit 10 and the vehicle components 12.
  • Electronic control units 10 form a part of every system provided in a car.
  • Electronic control units 10 are linked to components 12 which are sensor, actuators and the like.
  • Such a link between the electronic control units 10 and the sensors and actuators is realized using a communication network 14 such as a bus system.
  • the sensors and actuators continuously provide information to the electronic control units 10 regarding the functioning of the vehicle components 12 such as the engine, fuel injection systems, braking systems, airbag system and the like.
  • Electronic control units 10 not only control the function of the sensors and actuators and the vehicle components 12 but also monitor the functioning vehicle components 12 through the sensors, actuators and the like.
  • a testing device 16 is externally connected to the electronic control units 10 for communicating diagnostic information and diagnosing the faults occurring in the vehicle components 12 or the electronic control units 10 themselves.
  • the connection between the testing device 16 and the electronic control units 10 is provided through the communication network 14.
  • the electronic control unit 10 is capable of operating in a normal mode and a diagnostic mode.
  • the electronic control unit 10 performs control functions of controlling the vehicle components 12.
  • the electronic control units 10 are programmed in a manner such that major part of the resources available in the electronic control units 10 such as the working memory capacity is used for storing the diagnostic program and the microcontroller utilizing its processing time to perform normal control function in the vehicle via the components 12.
  • the resources available for diagnosing the vehicle and the components 12 and communicating of the thereby obtained diagnostic information are low.
  • generating and communicating diagnostic information is slow and inefficient.
  • the vehicle components 12 cannot communicate diagnostic information with the testing device 16. This would require individually connecting the testing device 16 to the vehicle components 12, which would require extra hardware, which in turn would increase cost. Also in case of multiple faults in the vehicle component 12 and the electronic control unit 10, unless the testing device 16 is separately connected to the electronic control units 10 and the vehicle component 12, it would be difficult to pin point where the fault occurred. Hence efficient diagnosis of the vehicle cannot be performed. So it is advantageous that the components 12 also have a normal mode and a diagnostic mode.
  • the electronic control unit 10 In the diagnostic mode the electronic control unit 10 is programmed such as to perform a diagnosis and communicate diagnostic information with vehicle components 12 and the testing device 16.
  • the electronic control unit 10 in the diagnostic mode does not perform all the vehicle control functions as it does in the normal mode, since during diagnostic mode the resources of the electronic control unit 10 are dedicated to performing diagnostic functions.
  • a vehicle enters a workshop for service diagnosis and diagnosis is to be performed. Then for communicating diagnostic information, first a connection is established between the testing device 16 and the communication network 14. The connection between the testing device 16 and the communication network 14 enables electronic control units 10, the testing device 16 and the vehicle components 12 to communicate with each other over the communication network 14.
  • the testing device 16 activates a diagnostic mode in the electronic control units 10, wherein a diagnostic program in the electronic control units 10 is activated which helps in communicating the diagnostic information between the electronic control unit 10, testing device 16 and the vehicle components 12.
  • a diagnostic program in the electronic control units 10 is activated which helps in communicating the diagnostic information between the electronic control unit 10, testing device 16 and the vehicle components 12.
  • the electronic control units 10 are programmed such that the working memory capacity of the electronic control units and the processing time of microcontroller is utilized for processing the diagnostic program. Further there is also a possibility of activating a diagnostic mode in the vehicle components 12.
  • a diagnostic program in the vehicle components 12 is executed by software using a local mini-microcontroller or special hardware meant for executing diagnostic programs. This allows the testing device 16 to communicate not only with the electronic control units 10 but also with the vehicle components 12.
  • the diagnostic program is either stored in the memory of the electronic control units 10 and vehicle components 12 or can be loaded onto the memory of the electronic control unit 10 and the vehicle components 12 from the testing device 16 via the communication network.
  • the method of performing diagnosis in a diagnostic mode is useful in the case of service diagnosis.
  • service diagnosis since the vehicle is not operating in the normal operating conditions the utilization of the memory capacity and the usage of the microcontroller in the electronic control units 10 in the diagnostic mode provides faster and efficient communication of diagnostic information.
  • the diagnostic program also provides that the vehicle components 12 are capable of communicating diagnostic information with the electronic control units 10 and the testing device 16. Also since the communication of the diagnostic information is effected over the existing communication network, this reduces the cost for extra hardware, which may be otherwise incurred for individually connecting the testing device 16 to the vehicle components 12 and the electronic control units 10.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing And Monitoring For Control Systems (AREA)
EP08103494A 2008-04-11 2008-04-11 Unité de contrôle électronique et procédé pour effectuer un diagnostic dans un véhicule Ceased EP2109083A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08103494A EP2109083A1 (fr) 2008-04-11 2008-04-11 Unité de contrôle électronique et procédé pour effectuer un diagnostic dans un véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08103494A EP2109083A1 (fr) 2008-04-11 2008-04-11 Unité de contrôle électronique et procédé pour effectuer un diagnostic dans un véhicule

Publications (1)

Publication Number Publication Date
EP2109083A1 true EP2109083A1 (fr) 2009-10-14

Family

ID=39739488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08103494A Ceased EP2109083A1 (fr) 2008-04-11 2008-04-11 Unité de contrôle électronique et procédé pour effectuer un diagnostic dans un véhicule

Country Status (1)

Country Link
EP (1) EP2109083A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2003344A (en) * 1977-08-24 1979-03-07 Leeds & Northrup Ltd Processor system for display and/or recording of information
EP0383593A2 (fr) * 1989-02-15 1990-08-22 Hitachi, Ltd. Système et dispositif de commande du coéfficient de charge pour automobiles
US5938708A (en) * 1997-07-03 1999-08-17 Trw Inc. Vehicle computer system having a non-interrupt cooperative multi-tasking kernel and a method of controlling a plurality of vehicle processes
US7013241B2 (en) 2003-01-23 2006-03-14 Denso Corporation Electronic control unit
US20060095174A1 (en) * 2002-06-10 2006-05-04 Thomas Sonnenrein Method and device for a vehicle-related telematics service

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2003344A (en) * 1977-08-24 1979-03-07 Leeds & Northrup Ltd Processor system for display and/or recording of information
EP0383593A2 (fr) * 1989-02-15 1990-08-22 Hitachi, Ltd. Système et dispositif de commande du coéfficient de charge pour automobiles
US5938708A (en) * 1997-07-03 1999-08-17 Trw Inc. Vehicle computer system having a non-interrupt cooperative multi-tasking kernel and a method of controlling a plurality of vehicle processes
US20060095174A1 (en) * 2002-06-10 2006-05-04 Thomas Sonnenrein Method and device for a vehicle-related telematics service
US7013241B2 (en) 2003-01-23 2006-03-14 Denso Corporation Electronic control unit

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