EP1668601A1 - System und verfahren zur diagnose eines automobils - Google Patents

System und verfahren zur diagnose eines automobils

Info

Publication number
EP1668601A1
EP1668601A1 EP03751621A EP03751621A EP1668601A1 EP 1668601 A1 EP1668601 A1 EP 1668601A1 EP 03751621 A EP03751621 A EP 03751621A EP 03751621 A EP03751621 A EP 03751621A EP 1668601 A1 EP1668601 A1 EP 1668601A1
Authority
EP
European Patent Office
Prior art keywords
sensing
diagnostic
signal
diagnostic data
testing device
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.)
Withdrawn
Application number
EP03751621A
Other languages
English (en)
French (fr)
Inventor
Robert Johannes Hoevenaar
Carel Christiaan Anthoni
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.)
Snap On Inc
Original Assignee
Snap On Technologies Inc
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 Snap On Technologies Inc filed Critical Snap On Technologies Inc
Publication of EP1668601A1 publication Critical patent/EP1668601A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME 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
    • G07C5/00Registering or indicating the working of vehicles
    • G07C5/008Registering or indicating the working of vehicles communicating information to a remotely located station
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00Testing of engines
    • G01M15/04Testing internal-combustion engines
    • G01M15/10Testing internal-combustion engines by monitoring exhaust gases or combustion flame
    • G01M15/102Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases

Definitions

  • the invention relates to a system for diagnosing an automotive vehicle, the system comprising sensing means for generating a sensing signal representative of a physical quantity of the automotive vehicle and a diagnostic testing device comprising a sensing input for receiving the sensing signal from a dedicated sensor device for cooperation with the testing device. Further, the invention relates to a method for diagnosing an automotive vehicle, the method comprising generating a sensing signal representative of a physical quantity of the automotive vehicle; and receiving the sensing signal by a diagnostic testing device comprising a sensing input for receiving the sensing signal from a dedicated sensor device for cooperation with the testing device.
  • Such a system, and corresponding method is known and applied in e.g. service, such as maintenance and diagnostics of automotive vehicles for decades.
  • This diagnostic testing device such as an exhaust emissions tester, an engine tester, a dynamometer, a brake tester, or any other suitable diagnostic testing device, is provided with signals generated by dedicated sensor devices, such as engine temperature sensors, exhaust gas sensors, ignition pulse sensors from which e.g. an angular speed or a number of revolutions per time unit of the engine is derived, etc.
  • dedicated sensor devices are mainly analogue, however, digital or partly digital implementations are currently seen also.
  • the sensor device provides a sensing signal to the diagnostic testing device which represents the quantity sensed by the sensor device, the diagnostic testing device deriving a diagnostic value from information contained in one or more sensing signals generated by a sensor device.
  • the diagnostic testing device comprises an exhaust tester, the sensor devices comprising an exhaust gas probe for monitoring a composition of exhaust gases of the vehicle, a temperature sensor for monitoring a vehicle engine temperature (e.g. a temperature of a cooling fluid or a temperature of oil in the engine) , and a probe which is connectable to an ignition cable for providing a signal representative of ignition pulses supplied to the engine or a cylinder thereof.
  • the diagnostic testing device in this example comprises respective sensing inputs for receiving a respective sensing signal from each of the sensor devices.
  • the invention intends to allow easy, convenient and reliable operation of the conventional diagnostic testing device with modern types of automotive vehicles .
  • the system according to the invention is characterized in that the sensing means comprise a communication unit, operationally connectable to a diagnostic data communication port of the vehicle for communicating diagnostic data with the automotive vehicle via a diagnostic data communication link and a sensing signal generation unit for receiving at least a part of the diagnostic data from the communication unit and for deriving from at least the part of the diagnostic data a signal compatible with the sensing input of the diagnostic testing device.
  • the communication interfacing unit thus receives diagnostic information from the vehicle via a diagnostic data communication port, which is currently available in (a majority of) all modern vehicles.
  • the diagnostic data or at least a part thereof which relates to the quantity which would according to the state of the art have been sensed by the respective sensing device, is transferred to the sensing signal generation unit which generates (e.g. making use of suitable hardware) a signal which is compatible with the sensing signal of the sensing device, as would have been generated according to the state of the art by the sensing means.
  • the sensing signal generation unit which generates (e.g. making use of suitable hardware) a signal which is compatible with the sensing signal of the sensing device, as would have been generated according to the state of the art by the sensing means.
  • an existing diagnostic testing device with a modern vehicle equipped with a diagnostic data communication port, by instead of generating the sensing signal by sensing means dedicated for the specific diagnostic testing device, deriving data relating to the respective quantity to be sensed from the diagnostic data which is available from the diagnostic data communication port of the vehicle, and generating a signal from this data, the signal being compatible with the sensing signal.
  • the diagnostic testing device can comprise a vehicle exhaust emissions tester.
  • Such exhaust emissions tester is usually equipped with various sensing devices, such as a gas analyzing probe, an engine temperature probe, and a pick-up probe for picking up an ignition signal from an ignition cable of the engine of the vehicle. From this ignition signal, the testing device is able to derive a quantity representing an angular speed, such as a number of revolutions per minute ("RPM") , of the engine, as will be known per se to a person skilled in the art.
  • RPM revolutions per minute
  • the diagnostic testing device is adapted to be provided with a plurality of sensing signals from e.g. a plurality of sensing devices, one or more of the plurality of sensing devices can be replaced by the combination of the communication interfacing unit and the sensing signal generation unit according to the invention.
  • the sensing signal provided by the sensing means advantageously comprises one or more of a group comprising a revolutions-per-time-unit (such as RPM) signal, an oil pressure signal, an oil and/or coolant temperature signal and a lambda sensor (s) signal (s).
  • the communication unit advantageously comprises a serial diagnostic testing and readout device, the diagnostic data communication link comprising a serial diagnostic data communication link.
  • a standard, commercially available tool i.e. a serial diagnostic testing and readout device, which is commonly used in automotive servicing and diagnostics, can be applied, which reduces costs of the solution according to the invention, as the serial diagnostic testing and readout device is normally already available at a service station.
  • the communication unit e.g.
  • the serial diagnostic testing and readout device is adapted to select from the diagnostic data a part which relates, comprises information relating to, the quantity relating to the respective at least one sensing signal.
  • the diagnostic data communication device forwards all information from the diagnostic data communication port, or any other suitable part thereof, to the sensing signal generation unit.
  • the sensing signal is an analogue signal, such as a voltage value or a current value, however it is also possible that the information in the analogue signal is comprised in any other suitable parameter of the signal, such as a time between successive pulses, a frequency, a ripple, etc.
  • the method according to the invention which is characterized by the step of generating the sensing signal comprises communicating diagnostic data with the automotive vehicle via a diagnostic data communication link and deriving from at least a part of the diagnostic data a signal compatible with the sensing input of the diagnostic testing device.
  • the same or similar embodiments as applicable to the system according to the diagnostic system according to the invention are also applicable to the method according to the invention.
  • fig. 1 shows a system for diagnosing an automotive vehicle according to the state of the art
  • fig. 2 shows a system for diagnosing an automotive vehicle according to the invention
  • fig. 3 shows a block schematic view of a part of the system according to fig. 2.
  • Fig. 1 shows an automotive vehicle 1 which is connected to a system 2 for diagnosing an automotive vehicle, in this example an exhaust emissions tester.
  • the system 2 comprises a sensing means which in this example comprises an exhaust emissions probe 3, an oil temperature probe 4 and an ignition cable probe 5.
  • the exhaust emissions probe 3 is operationally connectable, as schematically indicated, to an exhaust of the vehicle 1, while the oil temperature probe 4 is e.g. connectable to an existing oil temperature sensor in the engine, an oil outlet plug, oil inlet plug, oil level probe, or any other suitable location.
  • the ignition cable probe 5 can be attached, e.g. clamped, to an ignition cable or any other suitable element of an ignition system of the vehicle 1.
  • Each of the probes 3, 4, 5 provides a respective sensing signal which is provided, via a respective sensing input 3a, 4a, 5a to a diagnostic testing device 6.
  • Each of the sensing inputs 3a, 4a, 5a of the testing device 6 is adapted to receive a respective sensing signal in a particular format, such as a voltage, a current of other suitable quantity and derives information from a particular parameter thereof, such as an amplitude, a frequency, a pulse width, a pulse repetition frequency, a pulse height, an amplitude or a frequency of a ripple, an (amplitude of) a specific frequency component, etc., depending on a type and characteristics of the specific sensing device for the specific sensing input.
  • a respective sensing signal in a particular format, such as a voltage, a current of other suitable quantity and derives information from a particular parameter thereof, such as an amplitude, a frequency, a pulse width, a pulse repetition frequency, a pulse height, an amplitude or a frequency of a ripple, an (amplitude of) a specific frequency component, etc., depending on a type and characteristics of the specific sensing device for the specific sensing input.
  • sensing inputs 3a and 4a might be adapted for receiving a voltage, an analogue value of the voltage representing a value of the quantity to be sensed, while the sensing input 5a receives a pulse shaped voltage signal representing a voltage value on the ignition cable to which the ignition cable probe 5 is clamped.
  • the diagnostic testing device 6 is adapted to derive information from the sensing input 5a e.g. from a repetition frequency of the pulses.
  • the exhaust emissions probe 3 comprises or is connected to multiple sensing devices for e.g. sensing various different gases, to which end the sensing input 3a might be adapted for receiving, either parallel (via respective conductors) or serially signals representing quantities sensed by the various sensing devices in the exhaust emissions probe 3.
  • Fig. 2 again shows the vehicle 1, the exhaust emissions probe 3 which is operationally connected to the vehicle 1 and the diagnostic testing device 6.
  • the exhaust emissions probe 3 is operationally connected to the diagnostic testing device 6 via the sensing input 3a.
  • a communication unit 7 in this example a serial diagnostic testing and readout device
  • the serial diagnostic testing and readout device 7, which can e.g. comprise a commercially available readout tool, is connected via a serial diagnostic data communication link 8 to a diagnostic data communication port 9 of the vehicle 1. Via the serial diagnostic data communication link 8, diagnostic data is communicated between the vehicle 1 and the serial diagnostic testing and readout device 7.
  • the serial diagnostic testing and readout device 7 is further operationally connected to the sensing signal generation unit 10.
  • the sensing signal generation unit 10 receives, via any suitable communication link, such as a serial diagnostic data communication link, data from the serial diagnostic testing and readout device 7, the data comprising information concerning in this example oil temperature and rotational speed (RPM) of the engine. It is either possible that the serial diagnostic testing and readout device 7 communicates all data as received via the serial diagnostic data communication link 8 to the sensing signal generation unit 10, however preferably a suitable part of this data, such as only the data relating to oil temperature and revolutions, or any other subset comprising such data, is communicated to the sensing signal generation unit 10.
  • any suitable communication link such as a serial diagnostic data communication link
  • the serial diagnostic testing and readout device 7 can be supplied with specific software, as will be appreciated by the person skilled in the art, which is able to select data to be communicated to the sensing signal generation unit 10 from the data received via the serial diagnostic data communication link 8.
  • the sensing signal generation unit 10 generates, making use of the data received from the serial diagnostic testing and readout device 7, a signal compatible with the sensing input 4a and a signal compatible with the sensing input 5a.
  • a pulse train is generated, as schematically indicated in fig. 2, the pulse train having electrical characteristics similar to the signal generated by the ignition cable probe 5 according to fig. 1.
  • an oil temperature signal is generated by the sensing signal generation unit 10, the oil temperature signal having similar electrical characteristics as the oil temperature signal generated by the oil temperature probe in the system according to fig. 1.
  • the diagnostic testing device being supplied via sensing input 4a with the oil temperature signal generated by the sensing signal generation unit 10, and supplied via the sensing input 5a with the ignition signal generated by the sensing signal generation unit 10, is, based on the signals provided on the sensing inputs 3a, 4a, 5a able to perform a diagnosis in a manner (at least largely) identical to the diagnostic testing device 6 according to fig. 1.
  • no adaptations or modifications are foreseen for the diagnostic testing device 6 as compared to the testing device 6 according to fig. 1.
  • sensing signal generation unit 10 The operation of the sensing signal generation unit 10 is described with reference to fig. 3, in which a block schematic view of the sensing signal generation unit 10 has been depicted. Data from the serial diagnostic testing and readout device is provided to the sensing signal generation unit 10 via the data connection 10a as depicted in fig. 2 and fig. 3, while the respective signals generated by the sensing signal generation unit are provided via the outputs 10b and 10c respectively to inputs 4a and 5a of the diagnostic testing device 6 in fig. 2. As depicted in fig.
  • the sensing signal generation unit comprises a processing unit 20 which receives the data from the input 10a and derives data concerning the respective sensing signal (s), in this example data concerning oil temperature and data concerning an engine speed (number of revolutions per time unit) from the data provided from the serial diagnostic testing and readout device 7.
  • data concerning the respective sensing signal in this example data concerning oil temperature and data concerning an engine speed (number of revolutions per time unit) from the data provided from the serial diagnostic testing and readout device 7.
  • data related to the oil temperature is provided to a digital-to-analogue converter 21 which generates an analogue signal at output 10b.
  • the part of the diagnostic data relating to the quantity to be sensed is converted into a signal compatible with the respective sensing input of the diagnostic testing device 6.
  • the oil temperature signal is an analogue signal, an amplitude, e.g. a voltage, providing information on the oil temperature. Therefore, the sensing signal generation unit 10 comprises a suitable means for generating an analogue voltage from the data provided, such as the digital-to-analogue converter 21.
  • the ignition signal generated in fig. 1 by the ignition cable probe 5 however has a form of a pulse train originating from ignition pulses generated by an ignition system of the vehicle 1. Therefore, data concerning a number of revolutions per time unit of the engine is provided by the processing unit 20 to a pulse shaper circuit 22 which converts this data into a pulse train compatible with the input 5a of the diagnostic testing device 6 and having characteristics similar or identical to the signal as supplied by the ignition cable probe 5 in fig. 1.
  • the conversion circuits can e.g. comprise a digital-to-analogue converter, a pulse generator, an oscillator having an adjustable frequency and/or amplitude, an amplifier, etc..
  • the conversion circuit (s) can be implemented in the form of analogue and/or digital electronic circuits, however it is also possible that the conversion circuit (s) is/are implemented by means of suitable software running on a processing unit, such as a digital signal processor (DSP) .
  • DSP digital signal processor
  • the diagnostic testing device such as the exhaust emissions tester 6 can be operated with any type of vehicle supplied with a diagnostic communication port while avoiding troublesome and labor intensive establishing of operational connection between various probes, such as the ignition cable probe, oil temperature probe, etc. and various parts of the vehicle 1.
  • various probes such as the ignition cable probe, oil temperature probe, etc. and various parts of the vehicle 1.
  • the processing unit 20 fulfills the function of the communication unit.
  • the sensing signal generation unit can be a separate unit, however also it is also possible to integrate the sensing signal generation unit into the diagnostic testing device 6.
  • serial diagnostic testing and readout device is adapted by means of suitable software to send configuration instructions to the sensing signal generation unit, e.g. to make it suitable for a number of different exhaust emissions testers.
  • the processing unit 20 can e.g. be adapted to change an amplification parameter, or one or more range parameters or any other parameter in the sensing signal generation unit to match an output of the sensing signal generation unit with an input of the particular exhaust emissions tester.
EP03751621A 2003-10-03 2003-10-03 System und verfahren zur diagnose eines automobils Withdrawn EP1668601A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL2003/000678 WO2005034047A1 (en) 2003-10-03 2003-10-03 System and method for diagnosing an automotive vehicle

Publications (1)

Publication Number Publication Date
EP1668601A1 true EP1668601A1 (de) 2006-06-14

Family

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Family Applications (1)

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EP03751621A Withdrawn EP1668601A1 (de) 2003-10-03 2003-10-03 System und verfahren zur diagnose eines automobils

Country Status (3)

Country Link
EP (1) EP1668601A1 (de)
AU (1) AU2003269725A1 (de)
WO (1) WO2005034047A1 (de)

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Publication number Priority date Publication date Assignee Title
FR2977031A3 (fr) * 2011-06-24 2012-12-28 Renault Sas Dispositif de commande des moyens informatiques et d'acquisition de donnees d'un banc d'essai d'un vehicule automobiles et banc d'essai comportant un tel dispositif
US20140032039A1 (en) * 2012-07-26 2014-01-30 Ford Global Technologies, Llc Method and Apparatus for Periodic Onboard Compliance Testing
WO2018218533A1 (zh) * 2017-05-31 2018-12-06 深圳市爱夫卡科技股份有限公司 Src尾气后处理系统的诊断方法及诊断装置
FR3116117A1 (fr) * 2020-11-10 2022-05-13 Psa Automobiles Sa Procede de test d’un vehicule sur un banc d’essai

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Also Published As

Publication number Publication date
AU2003269725A1 (en) 2005-04-21
WO2005034047A1 (en) 2005-04-14

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