EP0742361B1 - Verfahren zum Erfassen der von einer Einspritzpumpe eines Dieselmotors über die Einspritzdüsen geförderten Kraftstoffmenge - Google Patents

Verfahren zum Erfassen der von einer Einspritzpumpe eines Dieselmotors über die Einspritzdüsen geförderten Kraftstoffmenge Download PDF

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Publication number
EP0742361B1
EP0742361B1 EP96100863A EP96100863A EP0742361B1 EP 0742361 B1 EP0742361 B1 EP 0742361B1 EP 96100863 A EP96100863 A EP 96100863A EP 96100863 A EP96100863 A EP 96100863A EP 0742361 B1 EP0742361 B1 EP 0742361B1
Authority
EP
European Patent Office
Prior art keywords
injection
fuel
absolute
pressure variation
fuel quantity
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.)
Expired - Lifetime
Application number
EP96100863A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0742361A3 (de
EP0742361A2 (de
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0742361A2 publication Critical patent/EP0742361A2/de
Publication of EP0742361A3 publication Critical patent/EP0742361A3/de
Application granted granted Critical
Publication of EP0742361B1 publication Critical patent/EP0742361B1/de
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
    • 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 from an injection pump of a diesel engine via the injection nozzles amount of fuel delivered, for the injection channels a pressure curve during the conveying process detected between the injection pump and the injectors and the amount of fuel is derived from it. Further relates the invention relates to a device for displaying the fuel consumption in a diesel motor vehicle with an evaluation device and a display device and on one Test bench for injection pumps of a diesel engine with a Measuring device for the detection of the fuel quantities are delivered via individual channels leading to the injection nozzles, with an evaluation device and a display device, with which the fuel quantities of the individual channels can be displayed.
  • test stands it is known to be the pumped or injected jFuel quantities for each individual channel via one Collect a large number of individual injections in one sight glass and the amount of fuel delivered per individual channel on a scale. This procedure is complex.
  • the known measure, on a test bench for everyone Providing a single-channel volume measurement device is technical complex and expensive.
  • the invention has for its object to provide a method with which also an absolute measurement of the over the amount of fuel delivered to individual injection channels exactly and enabled with an inexpensive measuring device becomes.
  • a device for displaying the fuel consumption is also intended and a test bench are provided at which the amount of fuel delivered is precise and easy and with inexpensive means is determined.
  • the pressure curve it is standardized that the area integral of the normalized pressure curve is formed and that by the Evaluation with a proportionality constant the absolute Amount of fuel is determined.
  • the area integral of the normalized pressure curve is proportional to the absolute amount of fuel and has proven to be stable, reliable value for determining the absolute Proven amount of fuel.
  • the measure is advantageous that the individual Pressure curve corresponding absolute amounts of fuel based on an additional volumetric measurement be determined.
  • various Adjustment criteria are adjusted, not just an exact statement about the amount of fuel delivered per individual channel be, but also a direct comparison between the different injection channels.
  • the procedure given here is essential faster and easier, displaying on a screen can be done so that reading errors are minimized.
  • the procedure extremely inexpensive is the procedure extremely inexpensive.
  • An advantageous application of the method is that the fuel consumption in a motor vehicle to that in the Process claims specified manner is detected. It can the amount of fuel in terms of the current and / or Average consumption evaluated and displayed become. This can be used to smooth the current Consumption display an integration over the Pressure curve curves of several individual injections.
  • Another favorable application of the method passes the test of injection pumps, whereby on the Basis of relative or absolute amounts of fuel an ad is formed from which deviations from one Target state per individual channel and / or deviations of the Individual channels can be recognized one below the other.
  • This application is especially in connection with in-line injection pumps advantageous, since here, for example, 12 injection channels must be checked and thus the time and the Plant costs can be significantly reduced.
  • 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 integrating unit 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 conveyor signal sensor with which the Pressure curve curves per injection channel are detectable and the a normalized output signal provides that in the Evaluation device by means of an integration unit Area integrals or pressure curve can be determined and the Area integrals proportional data of the fuel quantities can be derived, which can be fed to the display device.
  • the standardized output signal of the conveyor signal sensor or the delivery signal sensors in a series injection pump not only the fuel quantities of the individual Injection channels relative to each other with good reliability compare, but the fuel quantities of the individual channels can also be given as absolute values.
  • the measuring device in addition to the conveyor signal sensors has a volume meter with which the amount of fuel all injection channels together or only one injection channel is absolutely measurable.
  • the structure is, for example kind that the evaluation device a circuit stage with which the surface integral and the absolute Measurement result of the volume measuring device can be related and excluded the relationship, the absolute fuel quantities of the individual Injection channels can be derived.
  • FIG. 1 shows a normalized pressure curve D, like a conveyor signal sensor in the form of a Pressure sensor is obtained between the output of a Feed pump and a cylinder can be arranged.
  • FIG. 2 is a block diagram showing the successive stages for displaying a fuel quantity schematically shows. From a distributor feed pump VFP by means of a FSS pressure signal sensor Single injections recorded and as normalized Pressure curve curves D to an evaluation device AE1 passed. The evaluation device AE1 forms this Area integral of the pressure curve D between the Start of funding and end of funding and gives the result to one Display AZ continues with the amount of fuel delivered for example the driver of the motor vehicle or the Operator is displayed on a test bench.
  • the evaluation device AE1 formed surface integral of the pressure curve D can for Derivation of a consumption signal, for example in a Assignment level with one comparator unit and one Consumption data table corresponding consumption data assigned, which are then displayed.
  • the evaluation device AE1 can alternatively also be a Multiplier be provided in the result of the area integral with a proportionality constant is multiplied, the process of knowledge is based on the fact that the area integral is proportional to the amount of fuel delivered during the pressure curve.
  • Another alternative can be the assignment between the Area integral and the amount of fuel displayed also in the display device, for example, by scaling be made.
  • the evaluation device AE1 Display data for the display of a current fuel quantity, an average amount of fuel or during one generated total amount of fuel delivered and be displayed.
  • FIG. in this connection is the feed pump as an in-line feed pump RFP with six Outputs or conveyor channels formed. Every conveyor unit the in-line feed pump RFP is between its outlet and the assigned injection nozzle is a delivery signal sensor FSS for Detection of a pressure curve D assigned.
  • the FSS delivery signal sensors also deliver to their Outputs normalized pressure curve curves D, the one Evaluation device AE2 are supplied in the the manner described above determines the fuel quantities and a display device AZ are supplied.
  • Fuel quantities of the individual channels are shown side by side as it is for example for a test bench Assessment of the functioning of the individual conveyor units the in-line feed pump RFP is required.
  • the relative Deviations between the measurement results of the fuel quantities of the individual injection channels provide a good basis for diagnosis and setting on the test bench. Since the Pressure curve are standardized and defined on the test bench Measurement conditions prevail, is also by means of the individual Delivery signal sensor FSS recorded absolute fuel quantity pretty much.
  • the Total amount delivered through all injection channels Fuel or for only one injection channel by means of a Volume measuring device VM can also be measured.
  • the Evaluation device AE2 can then determine the absolute fuel quantity of the individual channels can be determined precisely. Is by means of Volume meter VM the total amount of fuel above all injection channels measured, this is done in that the total fuel quantity in the evaluation device AE2 according to the relative proportions of the means of Delivery signal sensors FSS detected the fuel quantities individual injection channels is divided.

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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)
  • Testing Of Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP96100863A 1995-05-09 1996-01-23 Verfahren zum Erfassen der von einer Einspritzpumpe eines Dieselmotors über die Einspritzdüsen geförderten Kraftstoffmenge Expired - Lifetime EP0742361B1 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=7761419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100863A Expired - Lifetime EP0742361B1 (de) 1995-05-09 1996-01-23 Verfahren zum Erfassen der von einer Einspritzpumpe eines Dieselmotors über die Einspritzdüsen geförderten Kraftstoffmenge

Country Status (4)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700738C1 (de) * 1997-01-11 1998-04-16 Daimler Benz Ag Verfahren zur Regelung der Einspritzmengen von Injektoren einer kraftstoffeinspritzenden Brennkraftmaschine
DE19726756C2 (de) * 1997-06-24 2002-03-07 Bosch Gmbh Robert System zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs
DE19740608C2 (de) * 1997-09-16 2003-02-13 Daimler Chrysler Ag Verfahren zur Bestimmung einer kraftstoffeinspritzbezogenen Kenngröße für einen Verbrennungsmotor mit Hochdruckspeicher-Einspritzanlage
DE19844602A1 (de) 1998-09-29 2000-03-30 Bosch Gmbh Robert Verfahren und Vorrichtung zum Messen der Winkelverteilung eines Flüssigkeitsstrahls
DE19908678C5 (de) * 1999-02-26 2006-12-07 Robert Bosch Gmbh Steuerung einer Kraftstoff direkteinspritzenden Brennkraftmaschine eines Kraftfahrzeugs insbesondere im Startbetrieb
DE102006034514B4 (de) * 2006-07-26 2014-01-16 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung einer Brennkraftmaschine
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118425A1 (de) * 1981-05-09 1982-12-09 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum erfassen der den brennraeumen eines dieselmotors zugefuehrten kraftstoffmenge
EP0228621B1 (en) * 1985-12-09 1991-09-18 Toyota Jidosha Kabushiki Kaisha Measuring device for measuring a fuel injection quantity
JP2867007B2 (ja) * 1993-01-27 1999-03-08 トヨタ自動車株式会社 内燃機関の燃料噴射終了時期検出装置

Also Published As

Publication number Publication date
CN1068934C (zh) 2001-07-25
EP0742361A3 (de) 1998-10-14
EP0742361A2 (de) 1996-11-13
DE59609080D1 (de) 2002-05-23
ES2174985T3 (es) 2002-11-16
CN1140235A (zh) 1997-01-15
DE19516923A1 (de) 1996-11-14

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