EP0457033A2 - Dispositif pour détecter un paramètre de fonctionnement variable - Google Patents

Dispositif pour détecter un paramètre de fonctionnement variable Download PDF

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Publication number
EP0457033A2
EP0457033A2 EP19910105855 EP91105855A EP0457033A2 EP 0457033 A2 EP0457033 A2 EP 0457033A2 EP 19910105855 EP19910105855 EP 19910105855 EP 91105855 A EP91105855 A EP 91105855A EP 0457033 A2 EP0457033 A2 EP 0457033A2
Authority
EP
European Patent Office
Prior art keywords
measuring devices
operating parameter
characteristic
supply voltage
signal
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.)
Granted
Application number
EP19910105855
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German (de)
English (en)
Other versions
EP0457033A3 (en
EP0457033B1 (fr
Inventor
Rainer Dipl.-Ing. Norgauer
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
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Filing date
Publication date
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0457033A2 publication Critical patent/EP0457033A2/fr
Publication of EP0457033A3 publication Critical patent/EP0457033A3/de
Application granted granted Critical
Publication of EP0457033B1 publication Critical patent/EP0457033B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/106—Detection of demand or actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0404—Throttle position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/08—Redundant elements, e.g. two sensors for measuring the same parameter

Definitions

  • the invention relates to a device for detecting a variable operating parameter according to the preamble of patent claim 1.
  • Such a device for detecting a variable operating parameter, in particular for angle measurement in internal combustion engines, with at least two measuring devices which record the operating parameter is known from EP-A 118 247.
  • the at least two measuring devices each generate signal quantities that represent the operating parameter to be recorded.
  • a characteristic that is linearly dependent on the parameter to be recorded is specified for one of the measuring devices, while another measuring device shows this linear characteristic only in selected signal size ranges and no signal size is generated outside of these areas.
  • These signal size ranges are specified with a view to a functional monitoring of the measuring devices and / or the system by plausibility comparisons of the signal sizes of the measuring devices.
  • the measuring devices have a common voltage supply, irregularities, in particular fluctuations in the amount, in the voltage supply lead to incorrect measurement results and thus to malfunctions of the internal combustion engine and / or of the system connected to the measuring devices, which cannot be recognized by the plausibility monitoring outlined above.
  • the invention is therefore based on the object of specifying measures which improve the operational safety of a device for detecting a variable operating parameter of an internal combustion engine and / or a motor vehicle.
  • the object is achieved in that the characteristics of the at least two measuring devices for detecting the operating parameter are linear over the value range of the operating parameter, at least outside the extreme value ranges of the operating parameter, the slope of at least one characteristic deviating from the one or the other. This enables the detection of irregularities in the area of the voltage supply of the measuring devices.
  • DE-OS 35 10 173 describes the use of such a device for position detection in an electronic engine power control.
  • the disadvantages described above are particularly disadvantageous because of irregularities in the voltage supply to the position detection elements, since the performance of the internal combustion engines is influenced as a function of the signal quantities of the position detection elements.
  • the procedure according to the invention improves the operational safety of a device for detecting an operating parameter and the control system provided with this device in the area of an internal combustion engine and / or a motor vehicle.
  • a special Advantage can be seen in devices with a common power supply consisting of several measuring devices for recording the same operating parameter.
  • the procedure according to the invention makes it possible to detect irregularities in the voltage supply, such as voltage dips, drift phenomena or short-term or long-term shunts to ground or vehicle electrical system.
  • FIG. 1 shows the integration of the measuring devices in an engine control, in particular an electronic engine power control
  • FIGS. 2 and 3 show exemplary embodiments of the device for detecting an operating parameter, in particular a position, in the form of multiple potentiometers which have a characteristic curve according to FIG.
  • the flowchart according to FIG. 5, in conjunction with the characteristic diagram according to FIG. 6, presents a possible embodiment for the detection of irregularities in the supply voltage range of the detection device.
  • the exemplary embodiment described below relates to a device for detecting the position of a power-determining element of an internal combustion engine or a motor vehicle, in particular in connection with an electronic engine power control system.
  • 10 designates a power-determining element of an internal combustion engine and / or a motor vehicle. This is preferably a power actuator (throttle valve or control rod).
  • the performance-determining element 10 is connected via a transmission path 12 to a detection device 14 for the position of the performance-determining element.
  • the device 14 comprises at least two position measuring devices 16 to 18, which are referred to below as sensors. Each of these sensors is coupled to the transmission path 12.
  • the device 14 or each of the sensors or measuring devices 16 to 18 is connected via connecting lines 20 and 22 to a positive pole 24 and a negative pole 26 of the supply voltage.
  • such an arrangement is also provided for an operating element that can be actuated by the driver, in particular an accelerator pedal, for detecting its position.
  • the device for position detection 15 assigned to accelerator pedal 11 via transmission path 13 is not shown in detail in FIG. However, its structure results from the arrangement of the device 14. The following explanations regarding the device 14 therefore also apply to the device 15.
  • the signal variables for the position of the power-determining element 10, which are formed by the sensors 16 to 18 as a function of the position of the power-determining element 10 in accordance with their characteristics or characteristic, are connected to one another via connecting lines 28 to 30 Control and regulation system 32 forwarded.
  • the connecting lines 28 to 30 connect the device 14 or the sensors 16 to 18 to the control or regulating system 32.
  • the connecting lines 28 to 30 are guided in the control or regulating system 32 to input circuits 34 to 36. These consist at least of A / D converters for generating digital position values.
  • the digital values are output to a computing element 42 in which the control or regulating function of the electronic engine power control system and the functional check of the device 14 described below are carried out.
  • the computing element 42 is connected to the power actuator 10 via a line 44, an output stage 46 and a control line 48.
  • the device 15 assigned to the accelerator pedal is led via lines 31, the number of which is predetermined in accordance with the number of sensors of the device 15, to input circuits 37 of the control and regulating system 32, the outputs of which form the lines 40 mentioned above.
  • the signal quantities generated by the individual sensors and representing the position of the element assigned to them are delivered via lines 28 to 30 and 31 by devices 14 and 15 to the control and regulating system for further processing.
  • the control system regulates the position of the power actuator on the basis of the position values of the power-determining elements 10 and 11.
  • the setpoint specified by element 11 is compared with the actual value taken from element 10 and the power actuator is controlled via line 48 to reduce the setpoint / actual value difference.
  • This regulation can be based both on an individual sensor signal quantity and on the basis of an average value formed from several sensor signal quantities or a minimum value of the signal quantities generated by the sensors are carried out.
  • at least one of the sensor signal quantities is used to monitor the function of the other sensors, the signal quantities being evaluated for monitoring purposes in the control and regulating system, in particular in the computing element 42.
  • the operating element 42 is supplied with further operating parameters from corresponding measuring devices, not shown in FIG. 1, which are further processed for control and regulation purposes.
  • the control system 32 is known to include further inputs and outputs which are necessary to carry out the functions engine power control, idle speed control, fuel metering, ignition timing determination, etc. and are not shown in FIG. 1 for reasons of clarity.
  • the device 14 which is described above using the example of an electronic engine power control, can also be used in connection with other control tasks in the area of the internal combustion engine and motor vehicle for determining a position or location, such as for example when measuring the inflowing air quantity or determining the position of the seats the occupants of the motor vehicle for seat adjustment, etc.
  • the device 14 and 15 known from FIG. 1 essentially comprises two sensors 16 and 18 according to FIG. 2.
  • the sensor 16 consists of a resistance track 100 and a grinder 102, which is fixed to the transmission path 12 connected is. Furthermore, the resistance track 100 is connected via the connecting line 20 to the positive pole 24 and via the connecting line 22 to the negative pole 26 of the supply voltage.
  • the wiper 102 of the sensor 16 is connected to a line 104 which is led to a resistor 106.
  • the second connection of the resistor 106 is acted upon by the connecting line 28, which connects the device 14 to the control and regulating system 32.
  • a resistor 110 connected to the pole 26 of the supply voltage is connected to the connecting line 28 at the connection point 108.
  • the line 28 leads via the node 108 to the input circuit 34, not shown in FIG. 2.
  • the second sensor 18 comprises a resistance path 112 and a wiper 114 connected to the transmission path 12.
  • the resistance path 112 is connected via line 116 to line 20, which leads to the positive pole 24 of the supply voltage.
  • the second end of the resistance track 112 is connected via line 118 to line 22 of the negative pole 26 of the supply voltage.
  • the wiper 114 is connected via the line 120 and the resistor 122 to the line 30, which leads to the input circuit 36 (not shown in FIG. 2) via the node 124, at which a resistor 126 is connected to the pole 26 of the supply voltage.
  • the relationship between the signal magnitude taken from the grinders 102 and 114 and the position of the power-determining element 10, which is passed on via the transmission path 12, is linear, at least outside the extreme value range.
  • the signal size results directly from the position of the wipers 102 and 114 on the basis of the voltage divider formed by the wiper on the resistance tracks 100 and 112, respectively. Due to the differently selected length of the resistance tracks 100 and 112, however, as a result of the different divider ratios for the positions of the grinders 102 and 114, the slopes or characteristics of the sensors 16 and 18 differ from one another.
  • the slope of the curve is the longer resistance track generally smaller than that of the sensor equipped with the shorter resistance path. This relationship is shown in FIG. 4.
  • the horizontal axis describes the operating parameter of the internal combustion engine or the motor vehicle to be measured, in the case of the exemplary embodiment the position of the power-determining element, which in its value range lies between a minimum (min) and a maximum (max) value, which for example each corresponds to the stops of the performance-determining element can be varied.
  • the signal quantities taken from the grinders 102 and 114 are plotted on the horizontal axis. These signal sizes move within a signal range between a minimum signal size assigned to the minimum value of the operating parameter (min 1, 2) and a maximum signal size assigned to the maximum value of the operating parameter (max 1/2 ).
  • FIG. 4 shows the characteristic curve 200 assigned to the sensor 18 and the characteristic curve 202 assigned to the sensor 16, which is equipped with a resistance path 100 that is longer than the resistance path 112. Both curves have different slopes.
  • the value range of the signal size of the sensor 16 is accordingly changed compared to the sensor 18, reduced in FIG. 4.
  • FIG. 4 A further possibility for generating the characteristics shown in FIG. 4 consists in circuitry measures in accordance with the arrangement according to FIG. 3.
  • FIG. 3 the elements that have already been listed and described with reference to FIG. 2 are provided with the same reference numerals and not in more detail mentioned.
  • the resistance tracks 300 of the sensor 16 or 302 of the sensor 18 shown in FIG. 3 have the same lengths.
  • a resistor element in particular a resistor 304, is inserted in the supply voltage supply line 116 of the resistance path 302 of the sensor 18.
  • a resistor element in particular a resistor 304
  • this measure leads to the fact that for each position of the wiper the voltage drop between the wiper and negative pole or the voltage drop from the positive pole of the supply voltage to the wiper forming the signal variable differs in amount, ie for the resistance path provided with the resistive element 304 is smaller than for the other lanes.
  • a characteristic curve behavior according to FIG. 4 can be achieved in this way. It should be noted that in FIG. 3 the characteristic assigned to sensor 18 assumes a shape according to characteristic 202 in FIG. 4, while the characteristic assigned to sensor 16 has the shape of characteristic 200.
  • the measures described were each carried out in the area of the positive connection of the sensors.
  • the same effect without impairing the core idea can also be achieved with the measures mentioned in the area of the negative pole.
  • the position control of a power actuator performed by the control system takes place as a function of the sensor to which a characteristic curve according to 200 is assigned.
  • the other sensor with a characteristic curve with a lower gradient, is used to monitor the function of this sensor.
  • Irregularities in the supply voltage of the sensors in particular those that result in a change in the amount of the signal range of the sensor signal variables, lead to the shifting of the characteristic curves 200 and 202, as is shown by the broken lines in FIG is shown.
  • the signal variables of the two sensors are considered, there is a fixed linear relationship between them, which is illustrated by the solid line 310 in FIG. 5 by way of example.
  • the signal size of one sensor is plotted on the horizontal axis according to FIG. 5, and the signal size of the other sensor or sensors is plotted on the vertical axis.
  • a change in the supply voltage for example as a result of voltage dips and / or drift phenomena compared to the normal state according to characteristic curve 310, leads to a shift in the characteristic curve in the diagram according to FIG. 5.
  • An increase in the supply voltage and the resulting shift in characteristic curve 310 is shown by the dashed curve 312 in Figure 5 shown.
  • the characteristic curve shifts such that the characteristic curve points of different sizes in the diagram in FIG. 5 are shifted upward with a tendency to the right.
  • the signal quantities (U i, j ) of the individual sensors are read in according to step 400.
  • the signal size (U jt ) of one or more sensors is determined as a function of the signal size (U i ) of the or the other sensors in each case by means of a predetermined map representing the normal state according to FIG. 5 (310).
  • this or these theoretical signal quantities (U jt ) read out from the characteristic diagram for the normal state are compared with the actually recorded signal quantities (U j ) of the sensors concerned and a query is made as to whether the theoretical and actual values are related to one another in a predetermined tolerance band are located. For example, this can be done by calculating the amount of the difference between the theoretical and actual value and the Query whether the difference exceeds a predetermined threshold can be made. If the latter is the case, it is concluded that the sensors are malfunctioning due to irregularities in the supply voltage range (step 406), while in the event of a negative result of the query in step 404, the sensors are rated as functional. After steps 408, or in the event of an error 406, the program part according to FIG. 3 is ended and, if necessary, started again.
  • the procedure according to the invention in the case of a device which detects an operating parameter of the internal combustion engine and / or the motor vehicle and has a plurality of measuring devices which have a common power supply and which have a common power supply, a check for irregularities in the area of this common power supply at each operating point, is enabled during the operating cycle of the internal combustion engine.
  • the procedure illustrated here is not only limited to the potentiometer arrangement described in the exemplary embodiments, but can also be used, in particular as part of the circuitry measures according to FIG. 3, for other sensor systems for detecting an operating parameter with a common voltage supply.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP91105855A 1990-05-14 1991-04-12 Dispositif pour détecter un paramètre de fonctionnement variable Expired - Lifetime EP0457033B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4015415 1990-05-14
DE4015415A DE4015415B4 (de) 1990-05-14 1990-05-14 Vorrichtung zur Erfassung eines veränderlichen Betriebsparameters

Publications (3)

Publication Number Publication Date
EP0457033A2 true EP0457033A2 (fr) 1991-11-21
EP0457033A3 EP0457033A3 (en) 1993-03-03
EP0457033B1 EP0457033B1 (fr) 1999-07-07

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ID=6406346

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EP91105855A Expired - Lifetime EP0457033B1 (fr) 1990-05-14 1991-04-12 Dispositif pour détecter un paramètre de fonctionnement variable

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US (1) US5136880A (fr)
EP (1) EP0457033B1 (fr)
JP (1) JP3386824B2 (fr)
DE (2) DE4015415B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302113B1 (en) 1998-10-14 2001-10-16 DECOUFLéS.A.R.L. Apparatus for making filter cigarettes
US6927566B2 (en) 2002-05-22 2005-08-09 Ab Eletronik Gmbh Device for generating output voltages
DE19821682B4 (de) * 1997-05-26 2010-01-07 Volkswagen Ag Verfahren und Vorrichtung zur Funktionsüberwachung eines Gebers

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DE4322472B4 (de) * 1993-07-06 2006-03-09 Siemens Ag Schaltungsanordnung zur Überwachung eines Stellungsgebers
DE4325584C2 (de) * 1993-07-30 1996-08-22 Giehl Klaus Ulrich Vorrichtung zur Rückhaltung von Schwimmstoffen an einer Überfallschwelle einer Regenentlastungsanlage
DE4327455A1 (de) * 1993-08-16 1995-02-23 Hella Kg Hueck & Co System zur Ansteuerung eines Stellgliedes zur Einstellung der Luftzufuhr eines Kraftfahrzeugmotors
US5622053A (en) * 1994-09-30 1997-04-22 Cooper Cameron Corporation Turbocharged natural gas engine control system
JP3296222B2 (ja) * 1996-12-19 2002-06-24 トヨタ自動車株式会社 スロットル制御装置
JP3116868B2 (ja) * 1997-07-23 2000-12-11 トヨタ自動車株式会社 リニアポジションセンサの異常検出方法
EP1105698B1 (fr) * 1998-08-12 2006-05-24 Siemens Aktiengesellschaft Procede pour determiner une position en fonction d'un signal de mesure emis par un capteur de position
JP3491587B2 (ja) * 1999-12-21 2004-01-26 株式会社デンソー 回転角度検出センサのフェイルモード調整方法
DE10006958C2 (de) * 2000-02-16 2001-12-06 Siemens Ag Verfahren zur Diagnose eines doppelpotentiometrischen Gebers
US6237564B1 (en) 2000-02-25 2001-05-29 Ford Global Technologies, Inc. Electronic throttle control system
US6463797B2 (en) 2000-02-25 2002-10-15 Ford Global Technologies, Inc. Electronic throttle system
EP1136681A3 (fr) 2000-03-24 2003-08-06 Ford Global Technologies, Inc. Système de commande électronique de papillon
US6691679B2 (en) 2001-11-29 2004-02-17 Ford Global Technologies, Llc System and method for controlling an operational position of a throttle valve in an engine
DE10222467A1 (de) * 2002-05-22 2003-12-11 A B Elektronik Gmbh GMR-Drehwinkelsensor
DE10222468A1 (de) * 2002-05-22 2003-12-11 A B Elektronik Gmbh Vorrichtung zur Erzeugung von Ausgangsspannungen
DE10226062A1 (de) 2002-06-12 2004-01-08 Ab Elektronik Gmbh Weitwinkel-Drehwinkelsensor
JP2004324720A (ja) * 2003-04-23 2004-11-18 Aisin Aw Co Ltd 回転角度検出センサーの故障検出装置
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
DE19821682B4 (de) * 1997-05-26 2010-01-07 Volkswagen Ag Verfahren und Vorrichtung zur Funktionsüberwachung eines Gebers
US6302113B1 (en) 1998-10-14 2001-10-16 DECOUFLéS.A.R.L. Apparatus for making filter cigarettes
US6927566B2 (en) 2002-05-22 2005-08-09 Ab Eletronik Gmbh Device for generating output voltages

Also Published As

Publication number Publication date
DE4015415A1 (de) 1991-11-21
JP3386824B2 (ja) 2003-03-17
DE59109138D1 (de) 1999-08-12
EP0457033A3 (en) 1993-03-03
US5136880A (en) 1992-08-11
DE4015415B4 (de) 2004-04-29
JPH04228853A (ja) 1992-08-18
EP0457033B1 (fr) 1999-07-07

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