WO2002037399A1 - Simulateur de capteur pour l'etalonnage et la maintenance de moteurs a combustion interne - Google Patents

Simulateur de capteur pour l'etalonnage et la maintenance de moteurs a combustion interne Download PDF

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Publication number
WO2002037399A1
WO2002037399A1 PCT/US2001/030117 US0130117W WO0237399A1 WO 2002037399 A1 WO2002037399 A1 WO 2002037399A1 US 0130117 W US0130117 W US 0130117W WO 0237399 A1 WO0237399 A1 WO 0237399A1
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WO
WIPO (PCT)
Prior art keywords
engine
sensor
sensor simulator
simulator
wiring harness
Prior art date
Application number
PCT/US2001/030117
Other languages
English (en)
Inventor
Jeffery Scott Hawkins
Kurt Joseph Couture
Ian Daniel Mckenzie
Original Assignee
Detroit Diesel Corporation
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 Detroit Diesel Corporation filed Critical Detroit Diesel Corporation
Priority to AU2001296327A priority Critical patent/AU2001296327A1/en
Publication of WO2002037399A1 publication Critical patent/WO2002037399A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2432—Methods of calibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/083—Safety, indicating, or supervising devices relating to maintenance, e.g. diagnostic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to apparatus and methods for calibrating, diagnosing, servicing, and verifying feature operation for an engine using sensor simulators.
  • Electronically controlled internal combustion engines have a wide variety of applications including passenger vehicles, marine vessels, earth-moving and construction equipment, stationary generators, and on-highway trucks, among others.
  • Electronic engine controllers provide a wide range of flexibility in tailoring engine performance to a particular application without significant changes to engine hardware.
  • the use of a full authority electronic controller provides a number of capabilities for enhancing engine operation, tailoring engine performance to a particular application, owner, or operator, and providing features which reduce or eliminate undesirable characteristics.
  • Typical engines may include 20 or more sensors used to provide information to the vehicle owner, operator, and service personnel and/or used to control the engine.
  • Sensors may be used to provide engine protection by quickly detecting adverse operating conditions which may indicate a fault or malfunction to reduce or eliminate any permanent engine damage.
  • the engine control module (ECM) monitors the sensor inputs to detect conditions which may trigger a diagnostic code or fault which may be used by owners/operators and/or service and maintenance personnel to troubleshoot and repair the engine.
  • Calibration variables are used to set the acceptable operating parameters for the engine and typically vary based on the engine size, type, and the application for the engine. While some calibration values are set by factory personnel, many may be modified by or at the request of the owner/operator based on the particular application. However, once a particular value is selected, it may be difficult to exercise or test the engine to determine whether a particular engine protection feature will work when needed.
  • the ECM In addition to monitoring sensor inputs to detect potential engine problems, the ECM typically includes logic to detect whether the sensor itself is functioning properly. However, depending upon the particular sensor, it is often difficult to determine whether the sensor is malfunctioning or whether the sensor is accurately detecting an actual adverse engine condition. As such, maintenance and service personnel must perform additional troubleshooting to diagnose the problem and repair or replace any faulty components on the engine. Troubleshooting procedures may include attempting to recreate the engine condition which triggered a fault. For example, to check engine fan operation, it is often necessary to warm the engine up to a temperature which triggers fan operation. Likewise, to test an ether start system it may be necessary to cool the engine or allow the engine to "soak" overnight when cold ambient temperatures exist.
  • An object of the present invention is to provide a sensor simulator for use in diagnosing engine faults, providing verification of proper function of features, and testing calibration values.
  • Another object of the present invention is to provide a method for troubleshooting engine diagnostic codes to reduce or eliminate unnecessary replacement of engine components.
  • a further object of the present invention is to provide a sensor simulator or false sensor to trigger an ECM code during troubleshooting.
  • Another object of the present invention is to provide a sensor simulator which generates a known signal corresponding to a simulated sensed parameter.
  • Yet another object of the present invention is to provide sensor simulators for pressure, temperature, and level sensors for use in calibration and service of an internal combustion engine.
  • a sensor simulator in carrying out the above objects, and other objects, features, and advantages of the invention, includes a connector adapted for engagement with a wiring harness and including at least two connector pins.
  • the simulator includes an electric or electronic device or circuit connected between the connector pins to provide a known signal corresponding to a known sensed engine condition.
  • a resistor is connected between the pins to simulate an engine condition, such as a low coolant level, high coolant temperature, or high oil temperature.
  • a resistor network such as a voltage divider provides a signal which simulates another condition such as a low oil pressure or high crankcase pressure.
  • Yet another embodiment includes a control to select a particular signal or value. The control may be a toggle switch, selector switch, or potentiometer, for example.
  • Electronic or microprocessor based sensor simulators may also be provided to simulate more sophisticated sensors which may provide analog or digital signals to the ECM.
  • the present invention provides a number of advantages relative to prior art techniques for verifying calibration information and troubleshooting internal combustion engines.
  • the present invention may be used to test dashboard diagnostic lights and to determine whether engine protection features have been properly configured/calibrated.
  • the present invention simplifies troubleshooting and reduces time required to diagnose faults related to engine fan controls and cold starting features such as ether start. These features may be tested and verified according to the present invention without waiting for the engine to warm up or cool down depending upon the particular feature.
  • the present inventio may be used by the engine manufacturer during assembly and testing of the engine and/or by OEMs when building a vehicle.
  • FIGURE 1 is a block diagram illustrating a prior art internal combustion engine with representative sensors for which a sensor simulator according to the present invention may be used;
  • FIGURE 2 illustrates a representative embodiment of a crankcase pressure sensor simulator to simulate a high pressure signal according to the present invention
  • FIGURE 3 illustrates a representative embodiment of a low coolant level sensor simulator according to the present invention
  • FIGURE 4 is an end view of the coolant level sensor simulator illustrated in Figure 3;
  • FIGURE 5 illustrates a representative embodiment of a coolant level sensor simulator with a connector adapted for engagement with a wiring harness according to the present invention
  • FIGURE 6 illustrates a representative embodiment for a pump pressure sensor simulator according to the present invention
  • FIGURE 7 illustrates a representative embodiment for a temperature sensor simulator with a connector adapted for engagement with a wiring harness according to the present invention
  • FIGURE 8 is a circuit schematic for a two-pin sensor simulator according to one embodiment of the present invention
  • FIGURE 9 is a circuit schematic for a three-pin sensor simulator according to one embodiment of the present invention
  • FIGURE 10 is a circuit schematic for a sensor simulator having a selectable engine condition control according to one embodiment of the present invention.
  • FIGURE 11 is a flow chart illustrating a method for simulating a sensor signal according to the present invention.
  • FIG. 1 provides a schematic/block diagram illustrating operation of a system or method for automatically starting an engine according to one embodiment of the present invention.
  • System 10 includes an internal combustion engine, such as a diesel engine 12, which may be installed in a vehicle 14 depending upon the particular application.
  • vehicle 14 includes a tractor 16 and semitrailer 18.
  • Diesel engine 12 is installed in tractor 16 and interfaces with various sensors and actuators located on engine 12, tractor 16, and semi-trailer 18 via engine and vehicle wiring harnesses as described in further detail below.
  • engine 12 may be used to operate industrial and construction equipment, or in stationary applications for driving generators, compressors, and/or pumps and the like.
  • An electronic engine control module (ECM) 20 receives signals generated by engine sensors 22 and vehicle sensors 24 and processes the signals to control engine and/or vehicle actuators such as fuel injectors 26.
  • ECM 20 preferably includes computer-readable storage media, indicated generally by reference numeral 28 for storing data representing instructions executable by a computer to control engine 12.
  • Computer-readable storage media 28 may also include calibration information in addition to working variables, parameters, and the like.
  • computer-readable storage media 28 include a random access memory (RAM) 30 in addition to various non-volatile memory such as read-only memory (ROM) 32, and keep-alive memory (KAM) 34.
  • Computer-readable storage media 28 communicate with a microprocessor 38 and input/output (I/O) circuitry 36 via a standard control/address bus.
  • computer-readable storage media 28 may include various types of physical devices for temporary and/or persistent storage of data which includes solid state, magnetic, optical, and combination devices.
  • computer readable storage media 28 may be implemented using one or more physical devices such as DRAM, PROMS, EPROMS, EEPROMS, flash memory, and the like.
  • computer-readable storage media 28 may also include floppy disks, CD ROM, and the like.
  • ECM 20 processes inputs from engine sensors 22, and vehicle sensors/switches 24 by executing instructions stored in computer-readable storage media 28 to generate appropriate output signals for control of engine 12.
  • the system 10 may include various types of sensors to monitor engine and vehicle operating conditions.
  • variable reluctance sensors may be used to monitor crankshaft position and/or engine speed.
  • Variable capacitance sensors may be used to monitor various pressures such as barometric air, manifold, oil gallery, and optional pump pressures.
  • Variable resistance sensors may be used to monitor positions such as a throttle (accelerator foot pedal) position.
  • Magnetic pick-up sensors may be used to sense vehicle speed, accumulate trip distance, and for various other vehicle features.
  • thermistors may be used to monitor various temperatures such as coolant, oil, and ambient air temperatures, for example.
  • engine sensors 22 include a timing reference sensor (TRS) 40 which provides an indication of the crankshaft position and may be used to determine engine speed.
  • TRS timing reference sensor
  • An oil pressure sensor (OPS) 42 and oil temperature sensor (OTS) 44 are used to monitor the pressure and temperature of the engine oil, respectively.
  • An air temperature sensor (ATS) 46 is used to provide an indication of the current intake air temperature.
  • a turbo boost sensor (TBS) 48 is used to provide an indication of the boost pressure of a turbocharger.
  • Coolant temperature sensor (CTS) 50 is used to provide an indication of the coolant temperature.
  • CTS coolant temperature sensor
  • engines utilizing a common rail fuel system may include a corresponding fuel pressure sensor (CFPS) 52.
  • CFPS fuel pressure sensor
  • ICPS intercooler coolant pressure sensor
  • ICTS temperature sensor
  • Engine 12 also preferably includes a fuel temperature sensor (FTS) 58 and a synchronous reference sensor (SRS) 60.
  • SRS 60 provides an indication of a specific cylinder in the firing order for engine 12. This sensor may be used to coordinate or synchronize control of a multiple-engine configuration such as used in some stationary generator applications.
  • Engine 12 may also include an oil level sensor (OLS) 62 to provide various engine protection features related to a low oil level.
  • OLS oil level sensor
  • a fuel restriction sensor (FRS) 64 may be used to monitor a fuel filter and provide a warning for preventative maintenance purposes.
  • a fuel pressure sensor (FPS) 68 provides an indication of fuel pressure to warn of impending power loss and engine fueling.
  • a crankcase pressure sensor (CPS) 66 provides an indication of crankcase pressure which may be used for various engine protection features by detecting a sudden increase in crankcase pressure indicative of an engine malfunction.
  • System 10 preferably includes various vehicle sensors/switches 24 to monitor vehicle operating parameters and driver input used in controlling vehicle 14 and engine 12.
  • vehicle sensors/switches 24 may include a vehicle speed sensor (VSS) which provides an indication of the current vehicle speed.
  • a coolant level sensor (CLS) 72 monitors the level of engine coolant in a vehicle radiator.
  • Switches used to select an engine operating mode or otherwise control operation of engine 12 or vehicle 14 may include an engine braking selection switch 74 which preferably provides for low, medium, high, and off selections, cruise control switches 76, 78, and 80, a diagnostic switch 82, and various optional, digital, and/or analog switches 84.
  • ECM 20 also receives signals associated with an accelerator or foot pedal 86, a clutch 88, and a brake 90.
  • ECM 20 may also monitor position of a key switch 92 and a system voltage provided by a vehicle battery 94. ECM 20 may communicate with various vehicle output devices such as status indicators/lights 96, analog displays 98, digital displays 100, and various analog/digital gauges 102. In one embodiment of the present invention, ECM 20 utilizes an industry standard data link 104 to broadcast various status and/or control messages which may include engine speed, accelerator pedal position, vehicle speed, and the like. Preferably, data link 104 conforms to SAE J1939 and SAE J1587 to provide various service, diagnostic, and control information to other engine systems, subsystems, and connected devices such as display 100.
  • a service tool 106 may be periodically connected via data link 104 to program selected parameters stored in ECM 20 and/or receive diagnostic information from ECM 20.
  • a computer 108 may be connected with the appropriate software and hardware via data link 104 to transfer information to ECM 20 and receive various information relative to operation of engine 12, and/or vehicle 14.
  • Engine and vehicle sensors communicates with the ECM via a wiring harness.
  • Engine and vehicle sensors typically include a connector designed for the particular sensor and application to provide reliable electrical contacts while withstanding harsh environmental conditions which allows the sensor to be replaced, if necessary.
  • the form factor for each sensor and its corresponding connector typically varies by the type of sensor and may vary by manufacturer.
  • one or more sensor simulators are provided with a connector corresponding to the actual sensor connector which is adapted for engagement with the wiring harness. To provide a simulated known engine condition, such as a high temperature or low pressure, the corresponding sensor is disconnected from the wiring harness with the corresponding sensor simulator plugged into the wiring harness.
  • FIG. 2 illustrates a representative embodiment of a crankcase pressure sensor simulator to simulate a high pressure signal according to the present invention.
  • Sensor simulator 120 includes a connector 122 adapted for engagement with a wiring harness as described and illustrated with reference to Figures 5-7.
  • a body or housing 124 contains appropriate circuitry to simulate a known or predetermined engine condition.
  • the known engine condition corresponds to a crankcase pressure which exceeds a corresponding threshold value stored in the ECM.
  • Sensor simulator 120 may be used to simulate a high crankcase pressure condition without uninstalling the crankcase pressure sensor.
  • Connector 122 is connected to the appropriate pigtail and the wiring harness.
  • a nominal 5-volt signal is applied to sensor simulator 120 which returns a voltage of about 3.5 volts which corresponds to a crankcase pressure of about 10 kPa (1.5 psig).
  • the engine failure threshold is calibrated to a value of about 2.5 kPa (0.3psig) such that the simulated value exceeds the corresponding threshold stored in the ECM to activate the associated fault code.
  • the various representative values provided throughout the description of the invention will vary depending upon the particular application and sensor being simulated.
  • the sensor simulators of the preferred embodiments use a passive element such as a resistor to simulate a known engine condition.
  • various other circuit elements may be provided to simulate capacitive, inductive, or any other type of sensor signal. Active elements may also be used to provide an appropriate signal to the ECM to simulate a known engine condition.
  • Coolant level sensor simulator 130 includes a connector 132 adapted for engagement with a wiring harness such as the vehicle interface harness. Depending upon the particular application, one or more wiring harnesses may be used to connect the sensors and corresponding sensor simulators to the ECM. Connector 132 is preferably of the same form factor as the corresponding low coolant level sensor connector used on the engine. Sensor simulator 130 also includes a body or housing 134 which includes a circuit to provide a signal corresponding to a known engine condition. In this example, housing 134 includes a circuit to provide a low coolant level signal to the ECM. *
  • Figure 4 provides an end view of the coolant level sensor simulator illustrated in Figure 3.
  • connector 132 may include one or more alignment or orientation pins 140 in addition to one or more conductors 142 and 144.
  • the particular form factor for conductors 142 and 144 may vary depending upon the particular sensor and application.
  • conductors 142 and 144 may comprise pins, sockets, pads, or the like.
  • Sensor simulators according to the present invention may also include a tab 146 to secure the simulator to the corresponding connector on the wiring harness during operation of the engine for troubleshooting and/or calibration verification purposes.
  • FIG. 5 illustrates a representative embodiment of a coolant level sensor simulator with a connector adapted for engagement with a wiring harness according to the present invention.
  • Sensor simulator 150 includes a connector adapted for engagement with a corresponding connector 152 on the wiring harness which is represented generally by conductors 154 and 156.
  • the wiring harness includes one or more connectors 160 adapted for engagement with the ECM.
  • sensor simulator 150 is coupled to the corresponding connector 152 and includes two conductors which engage with corresponding conductors in the wiring harness to simulate a known engine condition upon operation of the engine and/or powering of the ECM.
  • Pump pressure sensor simulator 178 includes a body or housing 180 coupled to a connector 182 having a plurality of conductors (not shown). Connector portion 182 is adapted for engagement with a corresponding connector 184 to provide an electrical connection through conductors 186 which are coupled to the wiring harness represented by conductors 188, 190, and 192. Conductors 190 and 192 are coupled to connector 194 which is adapted for engagement with the ECM. Conductor 188 provides an available input for various applications which may utilize a pump pressure sensor. In operation, the pump pressure sensor is disconnected from connector 184 and replaced by the corresponding pump pressure sensor simulator 178. Pump pressure sensor simulator 178 provides a signal corresponding to a known engine or vehicle condition, i.e. a known pressure or pressure condition.
  • Sensor simulator 200 is preferably a two-wire simulator which provides a known temperature condition or a known temperature for use in calibration, verification, and troubleshooting procedures.
  • Simulator 200 includes a connector 202 adapted for engagement with a corresponding connector 204 on the wiring harness.
  • Connector 204 includes two conductors 206 which are connected to the wiring harness, indicated generally by reference numeral 208.
  • Wiring harness 208 includes corresponding conductors 210, 212 which provide an electrical connection to the ECM via a corresponding connector 214.
  • temperature sensor simulator 200 is connected to wiring harness 208 via connectors 202 and 206.
  • Temperature sensor simulator 200 provides a signal representing a known engine or vehicle condition.
  • simulator 200 may provide a signal representing a particular temperature or temperature condition for air temperature, coolant temperature, etc.
  • the known temperature may be used to trigger a particular diagnostic or fault code in the ECM or may be used to trigger operation of various engine or vehicle accessories such as an ether start system or engine cooling fan.
  • Various temperature sensor signal errors may be provided to test coolant temperature shutdown logic, oil temperature shutdown logic, and/or cooling fan control logic based on coolant or oil temperature, for example.
  • simulator 200 may also be used to test diagnostic or warning indicators or lamps.
  • FIG 8 is a circuit schematic for a two-pin sensor simulator according to one embodiment of the present invention.
  • sensor simulator 220 includes conductors 222 and 224 which are coupled via a passive circuit element 226, such as a resistor.
  • Passive circuit element 226 is used to provide a signal indicative of a known engine or vehicle condition.
  • passive circuit element 226 provides a signal corresponding to a temperature of 250 °F or 121 °C by providing a nominal resistance of about 100 ohms.
  • the signal provided by the ECM is a nominal 5-volt signal.
  • a passive circuit element 226, such as a resistor may be implemented using conventional discrete components, a solid state device, surface mount device, or the like.
  • multiple selectable resistors may be provided to switch between corresponding specific temperatures or a variable resistor/potentiometer may be used to vary the temperature signal throughout a selected temperature range.
  • FIG. 9 is a circuit schematic for a three-pin sensor simulator according to one embodiment of the present invention.
  • Sensor simulator 230 includes at least three conductors 232, 234, and 236 coupled by a voltage divider circuit comprising resistors 238 and 240.
  • Sensor simulator 230 is preferably used to produce a signal or signals which simulate a specific pressure.
  • the ECM When connected to the ECM via a wiring harness, the ECM provides a voltage across conductors 232 and 236.
  • the resulting voltage between conductors 232 and 234, or alternatively between 234 and 236, is used to simulate a known engine condition or specific pressure.
  • a specific pressure may correspond to a low pressure signal relative to corresponding calibration variables stored in the ECM.
  • pressure simulators may also include selectable voltage divider circuits which provide corresponding selectable specific pressures.
  • a variable resistence device such as a potentiometer, may be used to vary the indicated pressure throughout a selected pressure range.
  • Figure 10 is a circuit schematic for a sensor simulator having a selectable engine condition control according to one embodiment of the present invention.
  • Sensor simulator 250 includes conductors 252, 254, and 256 with selectable voltage divider circuits connected therebetween.
  • One of the plurality of circuits or circuit elements is selected using a corresponding selector 258.
  • selector 258 which may be a toggle switch, connects either one of resistors 260, 262 in series with resistor 264 to form a voltage divider network or circuit among conductors 252, 254, and 256.
  • selector 258 may be used to select a particular known engine or vehicle condition from numerous available conditions with corresponding circuits or circuit elements in a similar fashion.
  • sensor simulator 250 is connected to the engine or vehicle wiring harness in place of a corresponding sensor.
  • One of the available known engine conditions is selected via selector 258.
  • the ECM is then powered-up and/or the engine is operated to execute the corresponding control logic with the sensor simulator 250 providing a simulated engine condition to trigger vehicle accessories and/or engine/vehicle diagnostic codes.
  • FIG. 11 is a flowchart illustrating a method for simulating a sensor signal according to the present invention.
  • Block 280 of Figure 11 represents disconnecting the engine sensor from the corresponding wiring harness.
  • the ECM may include one or more wiring harnesses to connect the various sensors and actuators to the ECM.
  • Step 280 is preferably performed without actually uninstalling or removing the engine/vehicle sensor which is to be simulated.
  • a corresponding sensor simulator is connected to the wiring harness in place of the actual sensor as represented by block 282.
  • the ECM is powered-up and/or the engine is started with the sensor simulator in place as represented by block 286.
  • the calibrations may be verified and/or diagnostic codes may be set without actually running the engine. Other codes or calibrations can be verified only upon actual operation of the engine.
  • the simulated engine condition provided by the sensor simulator is used to generate and analyze results as represented by block 288.
  • block 288 may be performed by monitoring diagnostic indicators 290, checking ECM diagnostic codes 292, or monitoring operation of an engine accessory or component 294.
  • diagnostic indicators represented by block 290 may include a check engine light, stop engine light, or various other alarms or lights.
  • ECM codes include various diagnostic and/or fault codes generated by the ECM which may be monitored by a service tool as illustrated in Figure 1.
  • engine codes may be communicated by flashing lights, or a dashboard display 100 ( Figure 1). Visual inspections of various engine/vehicle components may include monitoring operation of a cooling fan, for example.
  • the present invention provides a method and apparatus for use in calibrating and servicing an internal combustion engine which provide a number of advantages relative to the prior art.
  • the sensor simulators can be quickly and easily connected to the engine/vehicle harness to generate a signal corresponding to a known simulated engine condition to reduce time required for troubleshooting and verification of engine protection systems and the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne des systèmes et des procédés pour l'étalonnage et le diagnostic de moteurs à combustion interne, reposant sur l'utilisation d'un simulateur de capteur (120) qui fournit un signal correspondant à un état connu de fonctionnement du moteur simulé. Le simulateur (120) comprend au moins un connecteur (122) conçu pour s'encastrer avec un connecteur correspondant sur le faisceau de câblage du moteur ou du véhicule. Le simulateur (120) peut être relié au module de gestion du moteur (20) via le faisceau de câblage existant, en remplacement d'un ou plusieurs capteurs effectifs (22), pour tester les paramètres d'étalonnage ou pour déceler des anomalies dans le fonctionnement du moteur, sans désinstaller les capteurs proprement dits (22). Un circuit électrique ou électronique interne au simulateur (120) fournit au moins une valeur connue destinée à être utilisée dans l'essai de valeurs d'étalonnage et/ou la détection de codes d'anomalie de fonctionnement du moteur. On peut simuler différents types de capteurs (22), y compris les capteurs de position, de pression, de température et de niveau.
PCT/US2001/030117 2000-11-03 2001-09-25 Simulateur de capteur pour l'etalonnage et la maintenance de moteurs a combustion interne WO2002037399A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001296327A AU2001296327A1 (en) 2000-11-03 2001-09-25 Sensor simulator for calibration and service of internal combustion engines

Applications Claiming Priority (2)

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US70620300A 2000-11-03 2000-11-03
US09/706,203 2000-11-03

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Cited By (16)

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EP1850195A1 (fr) * 2006-04-25 2007-10-31 Siemens Aktiengesellschaft Procédé et dispositif pour tester un commande de moteur et dispositif de commande de moteur adapté
EP1906154A1 (fr) * 2006-09-29 2008-04-02 Fanuc Ltd Circuit pour simuler des données d'un codeur
FR2908156A3 (fr) * 2006-11-03 2008-05-09 Renault Sas Methode de diagnostic appliquee a un groupe motopropulseur
FR2924759A1 (fr) * 2007-12-11 2009-06-12 Vdh Investissements Sarl Procede pour permettre la combustion du super-ethanol sur les vehicules a moteur essence a injection electronique
WO2010111747A1 (fr) * 2009-04-03 2010-10-07 United Group Rail Services Limited Détection et prévention des défaillances dans des moteurs diesel
WO2014094149A1 (fr) * 2012-12-19 2014-06-26 Westport Power Inc. Outil d'entretien simulateur pour système à combustible gazeux d'un moteur à combustion interne et son procédé d'utilisation
WO2014118328A1 (fr) * 2013-02-01 2014-08-07 Jaguar Land Rover Limited Appareil et procédé de diagnostic de véhicule
WO2014118329A1 (fr) * 2013-02-01 2014-08-07 Jaguar Land Rover Limited Appareil et procédé de diagnostic de véhicule
WO2014169112A1 (fr) * 2013-04-11 2014-10-16 The Uninversity Of Tulsa Système de récupération et de conservation légale d'enregistreur de données d'évènement de véhicule à roues
CN105955246A (zh) * 2016-06-17 2016-09-21 桂林金铭和智控科技有限公司 一种基于saej1939协议的数字发动机模拟系统
CN106575106A (zh) * 2014-08-15 2017-04-19 帝斯贝思数字信号处理和控制工程有限公司 用于仿真可连接到调节装置上的外围电路设备的仿真装置和方法
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US9857820B2 (en) 2005-10-07 2018-01-02 Dspace Digital Signal Processing And Control Engineering Gmbh Method and device for simulating an electric/electronic load
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EP1850195A1 (fr) * 2006-04-25 2007-10-31 Siemens Aktiengesellschaft Procédé et dispositif pour tester un commande de moteur et dispositif de commande de moteur adapté
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FR2924759A1 (fr) * 2007-12-11 2009-06-12 Vdh Investissements Sarl Procede pour permettre la combustion du super-ethanol sur les vehicules a moteur essence a injection electronique
WO2010111747A1 (fr) * 2009-04-03 2010-10-07 United Group Rail Services Limited Détection et prévention des défaillances dans des moteurs diesel
EP2392902B1 (fr) * 2010-06-02 2017-08-09 B Medical Systems S.à.r.l. Agencement de capteur, dispositif de stockage comprenant un agencement de capteur et procédé de calibrage destiné au calibrage de celui-ci
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WO2014118329A1 (fr) * 2013-02-01 2014-08-07 Jaguar Land Rover Limited Appareil et procédé de diagnostic de véhicule
WO2014118328A1 (fr) * 2013-02-01 2014-08-07 Jaguar Land Rover Limited Appareil et procédé de diagnostic de véhicule
WO2014169112A1 (fr) * 2013-04-11 2014-10-16 The Uninversity Of Tulsa Système de récupération et de conservation légale d'enregistreur de données d'évènement de véhicule à roues
US9865102B2 (en) 2013-04-11 2018-01-09 The University Of Tulsa Wheeled vehicle event data recorder forensic recovery and preservation system
US10403058B2 (en) 2013-04-11 2019-09-03 The University Of Tulsa Wheeled vehicle event data recorder forensic recovery and preservation system
CN106575106A (zh) * 2014-08-15 2017-04-19 帝斯贝思数字信号处理和控制工程有限公司 用于仿真可连接到调节装置上的外围电路设备的仿真装置和方法
CN106575106B (zh) * 2014-08-15 2020-07-24 帝斯贝思数字信号处理和控制工程有限公司 用于仿真可连接到调节装置上的外围电路设备的仿真装置和方法
CN105955246A (zh) * 2016-06-17 2016-09-21 桂林金铭和智控科技有限公司 一种基于saej1939协议的数字发动机模拟系统
WO2018015083A1 (fr) * 2016-07-20 2018-01-25 Volkswagen Aktiengesellschaft Procédé de fonctionnement d'un système de véhicule automobile
CN113266495A (zh) * 2021-04-30 2021-08-17 中汽研汽车检验中心（天津）有限公司 利用燃油系统真空度诊断碳罐电磁阀故障的装置和方法

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