EP0742361A2 - Méthode pour déterminer la quantité de carburant fourni par une pompe à injection vers des buses d'injection dans un moteur diesel - Google Patents

Méthode pour déterminer la quantité de carburant fourni par une pompe à injection vers des buses d'injection dans un moteur diesel Download PDF

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Publication number
EP0742361A2
EP0742361A2 EP96100863A EP96100863A EP0742361A2 EP 0742361 A2 EP0742361 A2 EP 0742361A2 EP 96100863 A EP96100863 A EP 96100863A EP 96100863 A EP96100863 A EP 96100863A EP 0742361 A2 EP0742361 A2 EP 0742361A2
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EP
European Patent Office
Prior art keywords
fuel
injection
absolute
pressure curve
channels
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
EP96100863A
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German (de)
English (en)
Other versions
EP0742361B1 (fr
EP0742361A3 (fr
Inventor
Herbert Dipl.-Ing. Hoeckel
Heinz Dipl.-Ing. Kaelberer
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0742361A2 publication Critical patent/EP0742361A2/fr
Publication of EP0742361A3 publication Critical patent/EP0742361A3/fr
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Publication of EP0742361B1 publication Critical patent/EP0742361B1/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
    • F02D41/26—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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • 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
    • F02D2041/223—Diagnosis of fuel pressure sensors
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure

Definitions

  • the invention relates to a method for detecting the fuel quantity delivered by an injection pump of a diesel engine via the injection nozzles, in which a pressure curve during the delivery process between the injection pump and the injection nozzles is detected for the injection channels and the fuel quantity is derived therefrom. Furthermore, the invention relates to a device for displaying the fuel consumption in a diesel motor vehicle with an evaluation device and a display device, as well as to a test bench for injection pumps of a diesel engine with a measuring device for detecting the quantities of fuel that are emitted via individual channels leading to injection nozzles an evaluation device and a display device with which the fuel quantities of the individual channels can be displayed.
  • Such a method is identified as known in DE 31 18 425 C2.
  • a pressure curve is detected with a pressure sensor arranged between the injection pump and the injection nozzle, and the time duration of the injection process and an injection quantity signal are determined by differentiating the pressure curve is derived, which serves to regulate the amount of fuel.
  • a quantity signal from the integral of the pressure curve between the beginning and end of the injection time, although no further details have been given on this procedure. With this approach, it is difficult to accurately grasp the absolute amount of fuel.
  • test stands it is known to collect the amounts of fuel delivered or injected for each individual channel via a large number of individual injections in a sight glass and to read off the amount of fuel delivered per individual channel on a scale. This procedure is complex.
  • the further known measure of providing a volume measuring device for each individual channel on a test bench is technically complex and expensive.
  • the invention has for its object to provide a method with which an absolute measurement of the amount of fuel delivered via the individual injection channels is made possible precisely and with an inexpensive measuring device. Furthermore, a device for displaying the fuel consumption and a test bench are to be provided, in which the amount of fuel delivered is determined precisely and simply and with inexpensive means.
  • the pressure curve is normalized, that the surface integral of the normalized pressure curve is then formed and that by the Evaluation with a proportionality constant the absolute amount of fuel is determined.
  • the normalization of the pressure profile curve eliminates the usually large scattering of the pressure sensors caused by the manufacture or the measuring arrangement.
  • the area integral of the standardized pressure curve is proportional to the absolute fuel quantity and has proven to be a stable, reliable value for determining the absolute fuel quantity.
  • the measure is advantageous in that the absolute fuel quantities corresponding to the individual pressure curve are determined on the basis of an additional volumetric measurement.
  • the method specified here is much faster and easier, and the display can be carried out on a screen, so that reading errors are minimized.
  • the method is extremely inexpensive.
  • an advantageous possibility for carrying out the method is that the additional volumetric measurement is carried out jointly for all injection channels and that for determining the absolute fuel quantities Individual channels the total fuel quantity detected by the volumetric measurement is divided according to the relative fuel quantities of the individual channels recorded via the area integral, and an alternative possibility is that the additional absolute volumetric measurement of the fuel quantity is only carried out for one injection channel that the pressure curve of the Corresponding individual channel via the area integral relative fuel quantity is assigned to the absolute fuel quantity while determining the proportionality constant and that the absolute values of the fuel quantities of the other individual channels are determined by means of the proportionality constant.
  • the injection pump outlet offers a convenient place to record the pressure curve.
  • An advantageous application of the method is that the fuel consumption in a motor vehicle is recorded in the manner specified in the method claims.
  • the amount of fuel can be evaluated and displayed with regard to the current and / or average consumption.
  • integration can take place via the pressure curve of several individual injections.
  • a further advantageous application of the method is for testing injection pumps, a display being formed on the basis of the relative or absolute fuel quantities, from which deviations from a desired state per individual channel and / or deviations between the individual channels can be recognized.
  • This application is particularly advantageous in connection with in-line injection pumps, since, for example, 12 injection channels have to be checked, which considerably reduces the time and costs of the system.
  • the object is achieved in that at least one delivery signal sensor is arranged between an injection pump and the injection nozzles, which delivers a standardized output signal in the form of pressure curves corresponding to the individual injections, that the evaluation device for forming the area integral of the Pressure curve has an integrator and that an assignment level is provided with which the area integral can be assigned to an absolute consumption value.
  • An advantageous structure for deriving the consumption signals is that the assignment stage has a comparator unit and a consumption data table or a multiplier, and that the consumption data can be forwarded to the display device and displayed there or that the assignment level is integrated in the display device.
  • the object is achieved in that the measuring device has at least one delivery signal sensor with which the pressure curve per injection channel can be detected and which provides a standardized output signal that in the evaluation device by means of an integrating unit, the area integrals or pressure curve can be determined and that Area integrals proportional data of the fuel quantities can be derived, which can be supplied to the display device.
  • the standardized output signal of the delivery signal sensor or delivery signal sensors in a series injection pump not only can the fuel quantities of the individual injection channels be compared with one another with good reliability, but the fuel quantities of the individual channels can also be given as absolute values.
  • the measuring device has, in addition to the delivery signal sensors, a volume measuring device with which the fuel quantity of all injection channels together or only one injection channel can be measured absolutely.
  • the structure is, for example, of the type that the evaluation device has a circuit stage with which the area integrals and the absolute measurement result of the volume measuring device can be related and the absolute fuel quantities of the individual injection channels can be derived from the relationship.
  • FIG. 1 shows a normalized pressure curve D, as used by a delivery signal sensor in the form of a Pressure sensor is obtained, which can be arranged between the outlet of a feed pump and a cylinder.
  • FIG. 2 shows a block diagram which schematically shows the successive stages for displaying a fuel quantity. From a distributor feed pump VFP, pressure profiles of individual injections are recorded by means of a delivery signal sensor FSS and passed on as normalized pressure profile curves D to an evaluation device AE1. The evaluation device AE1 forms the area integral of the pressure curve D between the start of delivery and the end of delivery and forwards the result to a display AZ with which the amount of fuel delivered is displayed, for example, to the driver of the motor vehicle or the operator on a test bench.
  • a delivery signal sensor FSS is sufficient for all injection channels that lead to the various cylinders if this is arranged at the outlet of the delivery pump.
  • the surface integral of the pressure curve D formed in the evaluation device AE1 can be assigned to derive a consumption signal, for example in an assignment stage with a comparator unit and a consumption data table, which consumption data are then displayed.
  • a multiplying device can also be provided in the evaluation device AE1, in which the result of the area integral is multiplied by a proportionality constant, the process being based on the knowledge that the area integral is proportional to the quantity of fuel delivered during the pressure curve.
  • the assignment between the area integral and the fuel quantity displayed can also be carried out in the display device, for example by scaling.
  • display data for the display of an instantaneous fuel quantity, an average fuel quantity or a total fuel quantity delivered during a certain time can be generated and be displayed.
  • FIG. 3 Another exemplary embodiment for detecting and displaying the fuel quantity is shown schematically in FIG. 3.
  • the feed pump is designed as an in-line feed pump RFP with six outlets or feed channels.
  • a delivery signal sensor FSS for detecting a pressure curve D is assigned to each delivery unit of the in-line delivery pump RFP between its outlet and the assigned injection nozzle.
  • the delivery signal sensors FSS also deliver standardized pressure curve curves D at their outputs, which are fed to an evaluation device AE2, in which the fuel quantities are determined in the manner described above and are fed to a display device AZ.
  • the fuel quantities of the individual channels can be displayed side by side, as is required, for example, for a test bench for assessing the functioning of the individual delivery units of the in-line delivery pump RFP.
  • the relative deviations between the measurement results of the fuel quantities of the individual injection channels offer a good basis for diagnosis and adjustment on the test bench. Since the pressure curve is standardized and there are defined measurement conditions on the test bench, the absolute fuel quantity detected by means of the individual delivery signal sensors FSS is also quite accurate.
  • the total amount of fuel delivered via all injection channels or for only one injection channel can additionally be measured by means of a volume measuring device VM.
  • the absolute fuel quantity of the individual channels can then be precisely determined in the evaluation device AE2. If the total amount of fuel is measured across all injection channels by means of the volume measuring device VM, this is done in that the total fuel quantity is divided in the evaluation device AE2 in accordance with the relative proportions of the fuel quantities of the individual injection channels detected by the delivery signal sensors FSS.
  • the additional measurement by means of the volume measuring device VM is carried out only on a single injection channel, the quantity of fuel detected by the delivery signal sensor FSS of this injection channel is equated to the volumetrically measured, and the amount of fuel detected by the delivery signal sensors FSS of the other injection channels can then be very accurately absolutely by appropriate conversion be determined and displayed.
  • the automatic method described in FIG. 3 is significantly simpler than a conventional method in which the fuel quantities for each individual injection channel have to be collected in a sight glass on a test bench using, for example, a thousand individual injections; the measurement results can also be clearly and unambiguously displayed on the display AZ with additional information, so that the diagnosis and the setting are simplified.
  • a test bench with volume measuring devices for each injection channel there is a considerable price advantage since the volume measuring devices are very complex and therefore expensive to set up, while the conveying signal sensors according to the above description are very inexpensive and easy to handle.
  • a consumption measurement signal for display in a motor vehicle can be obtained via the evaluation device AE2.

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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)
  • Measuring Volume Flow (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Testing Of Engines (AREA)
EP96100863A 1995-05-09 1996-01-23 Méthode pour déterminer la quantité de carburant fourni par une pompe à injection vers des buses d'injection dans un moteur diesel Expired - Lifetime EP0742361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19516923 1995-05-09
DE19516923A DE19516923A1 (de) 1995-05-09 1995-05-09 Verfahren zum Erfassen der von einer Einspritzpumpe eines Dieselmotors über die Einspritzdüsen geförderten Kraftstoffmenge

Publications (3)

Publication Number Publication Date
EP0742361A2 true EP0742361A2 (fr) 1996-11-13
EP0742361A3 EP0742361A3 (fr) 1998-10-14
EP0742361B1 EP0742361B1 (fr) 2002-04-17

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Family Applications (1)

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EP96100863A Expired - Lifetime EP0742361B1 (fr) 1995-05-09 1996-01-23 Méthode pour déterminer la quantité de carburant fourni par une pompe à injection vers des buses d'injection dans un moteur diesel

Country Status (4)

Country Link
EP (1) EP0742361B1 (fr)
CN (1) CN1068934C (fr)
DE (2) DE19516923A1 (fr)
ES (1) ES2174985T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2321116A (en) * 1997-01-11 1998-07-15 Daimler Benz Ag Regulating the injection quantities of fuel injectors of combustion engines using fuel pressure measurements
DE19740608A1 (de) * 1997-09-16 1999-03-18 Daimler Benz Ag Verfahren zur Bestimmung einer kraftstoffeinspritzbezogenen Kenngröße für einen Verbrennungsmotor mit Common-Rail-Einspritzanlage
FR2790284A1 (fr) * 1999-02-26 2000-09-01 Bosch Gmbh Robert Procede et appareil de commande d'un moteur a combustion interne a injection directe de carburant d'un vehicule automobile, notamment au demarrage
EP1884646A2 (fr) * 2006-07-26 2008-02-06 Mtu Friedrichshafen Gmbh Procédé de commande dýun moteur à combustion interne

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19726756C2 (de) * 1997-06-24 2002-03-07 Bosch Gmbh Robert System zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs
DE19844602A1 (de) 1998-09-29 2000-03-30 Bosch Gmbh Robert Verfahren und Vorrichtung zum Messen der Winkelverteilung eines Flüssigkeitsstrahls
US7444235B2 (en) * 2007-02-06 2008-10-28 Gm Global Technology Operations, Inc. Post catalyst oxygen sensor diagnostic
CN104895721B (zh) * 2015-04-09 2017-12-22 宁波高新区世代能源科技有限公司 智能喷油嘴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228621A1 (fr) * 1985-12-09 1987-07-15 Toyota Jidosha Kabushiki Kaisha Dispositif de mesure pour mesurer une quantité de carburant d'injection
DE3118425C2 (fr) * 1981-05-09 1990-06-07 Robert Bosch Gmbh, 7000 Stuttgart, De
JPH06280717A (ja) * 1993-01-27 1994-10-04 Toyota Motor Corp 内燃機関の燃料噴射終了時期検出装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118425C2 (fr) * 1981-05-09 1990-06-07 Robert Bosch Gmbh, 7000 Stuttgart, De
EP0228621A1 (fr) * 1985-12-09 1987-07-15 Toyota Jidosha Kabushiki Kaisha Dispositif de mesure pour mesurer une quantité de carburant d'injection
JPH06280717A (ja) * 1993-01-27 1994-10-04 Toyota Motor Corp 内燃機関の燃料噴射終了時期検出装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 095, no. 001, 28. Februar 1995 & JP 06 280717 A (TOYOTA MOTOR CORP;OTHERS: 01), 4. Oktober 1994 *
POTZ D ET AL: "KORRELATIONSVERFAHREN ZUR EINSPRITZMENGENMESSUNG" MTZ MOTORTECHNISCHE ZEITSCHRIFT, Bd. 51, Nr. 7 / 08, 1. Juli 1990, Seiten 298-304, XP000147934 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2321116A (en) * 1997-01-11 1998-07-15 Daimler Benz Ag Regulating the injection quantities of fuel injectors of combustion engines using fuel pressure measurements
GB2321116B (en) * 1997-01-11 1999-09-08 Daimler Benz Ag Method for regulating the injection quantitites of fuel injectors of combustion engines
DE19740608A1 (de) * 1997-09-16 1999-03-18 Daimler Benz Ag Verfahren zur Bestimmung einer kraftstoffeinspritzbezogenen Kenngröße für einen Verbrennungsmotor mit Common-Rail-Einspritzanlage
EP0907015A2 (fr) 1997-09-16 1999-04-07 DaimlerChrysler AG Procédé pour déterminer des grandeurs correspondant à l'injection dans un moteur à combustion interne dans un système d'injection avec rampe à carburant commune.
US6088647A (en) * 1997-09-16 2000-07-11 Daimlerchrysler Ag Process for determining a fuel-injection-related parameter for an internal-combustion engine with a common-rail injection system
DE19740608C2 (de) * 1997-09-16 2003-02-13 Daimler Chrysler Ag Verfahren zur Bestimmung einer kraftstoffeinspritzbezogenen Kenngröße für einen Verbrennungsmotor mit Hochdruckspeicher-Einspritzanlage
FR2790284A1 (fr) * 1999-02-26 2000-09-01 Bosch Gmbh Robert Procede et appareil de commande d'un moteur a combustion interne a injection directe de carburant d'un vehicule automobile, notamment au demarrage
EP1884646A2 (fr) * 2006-07-26 2008-02-06 Mtu Friedrichshafen Gmbh Procédé de commande dýun moteur à combustion interne
EP1884646A3 (fr) * 2006-07-26 2013-08-07 Mtu Friedrichshafen Gmbh Procédé de commande dýun moteur à combustion interne

Also Published As

Publication number Publication date
CN1068934C (zh) 2001-07-25
DE19516923A1 (de) 1996-11-14
EP0742361B1 (fr) 2002-04-17
CN1140235A (zh) 1997-01-15
DE59609080D1 (de) 2002-05-23
EP0742361A3 (fr) 1998-10-14
ES2174985T3 (es) 2002-11-16

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