EP2748450A1 - Système à rampe commune d'injection de carburant, moteur à combustion interne, et dispositif et procédé de commande et/ou de régulation d'un moteur à combustion interne - Google Patents

Système à rampe commune d'injection de carburant, moteur à combustion interne, et dispositif et procédé de commande et/ou de régulation d'un moteur à combustion interne

Info

Publication number
EP2748450A1
EP2748450A1 EP12746284.4A EP12746284A EP2748450A1 EP 2748450 A1 EP2748450 A1 EP 2748450A1 EP 12746284 A EP12746284 A EP 12746284A EP 2748450 A1 EP2748450 A1 EP 2748450A1
Authority
EP
European Patent Office
Prior art keywords
pressure
logic
injector
memory unit
memory
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
EP12746284.4A
Other languages
German (de)
English (en)
Other versions
EP2748450B1 (fr
Inventor
Manuel Boog
Gerald Fast
Robby Gerbeth
Michael Walder
Ralf Speetzen
Jörg REMELE
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen 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 MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP2748450A1 publication Critical patent/EP2748450A1/fr
Application granted granted Critical
Publication of EP2748450B1 publication Critical patent/EP2748450B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • 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
    • F02D41/3809—Common rail control systems

Definitions

  • the invention relates to a common rail system for an internal combustion engine according to the preamble of claim 1.
  • a rail connects a injector for injecting the fuel into a working chamber of an internal combustion engine via a high pressure guide for fuel, the high pressure guide comprising a high pressure component with a single component.
  • Memory has, having a pressure measuring device.
  • injection start and injection end are regulated as parameters of an electronic device.
  • injection start and injection end are regulated as parameters of an electronic device.
  • the problem that there is a time delay between the start of energization of the injector, the needle stroke of the injector and the actual injection start. The same applies to the injection end.
  • An inaccuracy in the control of the injection start and the injection end ultimately leads to an inaccuracy concerning the amount of fuel supplied to the internal combustion engine.
  • an aforementioned concept can lead to inaccuracies, for example due to injection behavior that varies with the life of the injectors.
  • the invention begins, whose task is to develop a common rail system of the type mentioned.
  • a detection and evaluation of injector sizes with individual memory should be possible in an improved manner.
  • this should be possible in the case of a pressure measuring device.
  • this should also be possible in the case of an aging or an interchanged injector.
  • the object concerning the common rail system is achieved with a common rail system of the type mentioned, in which the features of the characterizing part of claim 1 are provided according to the invention.
  • the pressure measuring device is coupled to a local logic and memory unit which is designed to locally evaluate and store injector data and / or rail data.
  • the invention is based on the consideration that the systems described so far in the prior art of the type described above can still be improved with central electronics. On the one hand, this applies to internal combustion engines with a comparatively small number of cylinders of perhaps 4 to 8 or 10 cylinders. In that case, it has indeed proven to be cost-effective-already locally-at each or every cylinder, to provide a logic and memory unit with a pressure measuring device which is designed, in particular, to locally evaluate and store data of an injector. Moreover, however, the concept of the invention may also be advantageous for engines with high numbers of cylinders, since thereby a more effective data function and safer evaluation or assignment of evaluated data to a particular cylinder is possible. Overall, the concept of the invention makes it possible to store individual data of a high-pressure component such as an injector or a single memory and / or the rail by means of the decentralized electronics thus realized and to carry out an evaluation already locally at the place of data creation.
  • a high-pressure component such as an injector or a single memory and / or
  • individual data such as manufacturer information, acceptance data, settings or other injector-individual data as well as diagnostic data for an injector can be decentrally recorded and stored or already evaluated.
  • the backup functionality for data can be adopted locally, which has advantages in a loss of data in the central electronics.
  • the invention provides a method of the type mentioned, according to the invention in the Characteristics of the characterizing part of claim 15 are provided.
  • the pressure of the individual accumulator is measured via a pressure measuring device on the individual accumulator immediately after or before a hydraulic resistance of the high-pressure guide and evaluated in a local logic and memory unit, wherein additionally only selected data is given to a bus to the central electronics.
  • the local logic and memory unit can already have an injector model for model-based injector control.
  • an evaluation of injector data can already be carried out locally.
  • the local logic and memory unit also has a diagnostic model for model-based diagnosis and / or evaluation of injector data. This may include, for example, parity equations, observer or parameter estimation techniques.
  • the pressure measuring device is formed in the form of a strain sensor.
  • the expansion sensor can be particularly preferably formed in the form of a strain gauge.
  • a strain gauge is preferably arranged on the outside of the single memory, wherein the individual memory, a hydraulic resistance is arranged upstream or downstream of the integration directly into the high-pressure line.
  • the memory unit can be separated from the logic unit.
  • This has the advantage that different or differently designed storage units can be available for a logic system of locally wedged local electronics in combination with central electronics.
  • it has proved to be advantageous that, when the logic unit and the memory unit are separated, the memory unit is designed to remain on a high-pressure component.
  • the aforementioned development has proved to be advantageous for the case of a high-pressure component in the form of an injector.
  • this measure can also prove to be advantageous for a high pressure component in the form of a single memory or a rail.
  • identification data and information and / or diagnostic data relevant to the high-pressure component are always carried along with the high-pressure component and are available; this in a particularly advantageous manner in the memory is replaced with the high-pressure component and can be connected to the local logic unit.
  • the replaceable local memory unit can thus be coupled to the logic system, as it were, with the relevant data for the high-pressure component, approximately in the form of an electronic thumbprint.
  • diagnostic data such as aging data, current behavior or the like with a replaced or substitute high-pressure component are available.
  • 1 is a schematic representation of an internal combustion engine with a common rail system and a high pressure component with a single memory and with a central electronics and a local logic and memory unit according to a particularly preferred embodiment
  • 2 is a block diagram of a method for measuring data acquisition and evaluation in a common rail system for an internal combustion engine with a central electronics and a local, d. H. distributed, number of logic and memory units according to a preferred embodiment.
  • the common rail system 100 comprises a low-pressure pump 2 for fuel delivery from a fuel tank 3, a first high-pressure pump 5 for conveying the fuel under pressure increase initially in a rail 6.
  • the fuel is further from the rail 6 in a provided for each cylinder of the internal combustion engine 1 single memory 7 for temporarily storing the prestressed fuel and finally in an injector 8 for Injecting the fuel into the cylinder or the combustion chamber of the internal combustion engine 1 further promoted.
  • the fuel in the individual memory 7 is sufficiently biased to ensure sufficient injection into the combustion chamber of the internal combustion engine 1.
  • a feedback of noise in the rail 6 is attenuated with appropriate design of the feed line from the rail 6 to the individual memory 7, d. H. the connecting line from the rail 6 to the individual memory 7 has a correspondingly high hydraulic resistance.
  • This system is controlled by an electronic control unit (ADEC or ECU) of central electronics 9 (with central logic 1 1) as well as by a distributed local electronics 12.
  • a locally distributed local electronics 12 comprises a number of each local -am the place of generstehung- formed logic and memory units ACR, AE, AI which are each connected to a respective sensor 10, 20, 30 directly on site.
  • the electronic control unit of the central electronics 9 includes components of a microcomputer system with a central logic 11 and input and output 9.1, 9.2 of the electronic control unit of the central electronics 9;
  • a microprocessor and buffers and memory devices EEPROM, RAM
  • I / O devices to form input 9.1 and output 9.2.
  • EEPROM, RAM electrically erasable programmable read-only memory
  • I / O devices to form input 9.1 and output 9.2.
  • a local measuring device is thus present, namely here a rail pressure sensor 10 and an individual accumulator pressure sensor 20 and an injector pressure sensor 30 to be understood as an option -
  • a local logic and memory unit ACR, AE and optionally AI- decentralized distributed local electronics 12 is coupled - namely a rail logic and memory unit ACR and a single storage and injector logic and storage unit AE, AI.
  • AI only one can be provided, so that one of both is optional.
  • the present embodiment provides only the single-storage logic and storage unit AE, so that the injector logic and storage unit AI shown in FIG. 1 is an option.
  • the logic and memory units ACR, AE are each designed to locally evaluate and store measurement data of the common rail system 100.
  • this is concretely the pressure data of a rail pressure pCR on the rail 6 and pressure data of a single accumulator pressure pE on the individual accumulator 7.
  • the evaluated measurement data A (pE) and A (pCR) are respectively output from the output of the local logic and storage units AE, ACR to the electronic control unit ( ADEC or ECU) of the central electronics 9 with the central logic 11 via the input 9.1 forwarded.
  • the local logic and memory unit AE is arranged integrally with the individual memory pressure sensor 20 in the form of a strain gauge on the individual memory 7.
  • the individual memory 7 may also be formed with the injector 8 in a single housing.
  • the local logic and storage unit ACR for the rail 6 with the rail pressure sensor 10 is integrated on the rail 6.
  • the exemplary embodiment illustrated in FIG. 1 follows a general system, as shown schematically as a block diagram in FIG.
  • the common rail system 100 provides for an internal combustion engine 1 a combined control of the central electronics 9 and a distributed distributed local electronics 12 before.
  • the distributed distributed local electronics 12 is integrated in a construction of a number of measuring devices M1, M2 ... Mi and a number of directly with the measuring devices in an integrated form accommodated logic and memory units A1 / S1, A2 / S2 ... Ai / Si formed.
  • the measuring device M1, M2 is a pressure measuring device with an integrated memory and logic unit A1 / S1, A2 / S2 for measuring and evaluating a single memory pressure pE and a rail pressure pCR, which function as explained with reference to FIG. 1 and there with AE, ACR are designated.
  • the further measuring devices Mi may be of a different type, for example comprising a temperature measuring device or the like, and may likewise each be integrated with a local logic and memory unit Ai / Si.
  • a measuring device M1, M2 is designed to Mi to make a measurement on the common-rail system 100, for example on a single memory (7 in Fig Ig.1), referred to herein as component B1 is listed or on a rail (6 in Fig. 1) which is listed here as component B2 or another component Bi of the common rail system 100.
  • component B1 a single memory (7 in Fig Ig.1)
  • component B2 a rail (6 in Fig. 1) which is listed here as component B2 or another component Bi of the common rail system 100.
  • component B1 is listed or on a rail (6 in Fig. 1) which is listed here as component B2 or another component Bi of the common rail system 100.
  • component B1 is listed or on a rail (6 in Fig. 1) which is listed here as component B2 or another component Bi of the common rail system 100.
  • a local logic and memory unit A1 / S1, A2 / S2 ... Ai / Si integrated with the measuring device.
  • diagnostic data D can be distributed individually for each component B, decentralized detected and stored in a memory Si.
  • a last set of diagnostic data can be provided in a memory Si, which is designed as a ring memory.
  • an injector pressure sensor 30 is provided additionally or alternatively to the individual accumulator pressure sensor 20, which is very similar to a previously explained local logic and storage unit AE for the individual accumulator 7 or a local logic - And memory unit ACR for the rail 6 can be read.
  • a local logic and memory unit AI can be provided for the injector and the pressure sensor 30 provided on the injector, in the form of a strain gauge. Their interpretation can basically be done on the same principle as for the logic and memory unit AE and ACR.
  • the logic and memory unit AE and / or AI has a memory unit S and a logic unit A, wherein the memory unit S can be separated from the logic unit A.
  • the memory unit S is provided to remain on the injector or individual memory.
  • the memory unit S of the logic and memory unit AI can be exchanged with the injector 8 and the strain gauge 30 or the memory unit S of the logic and memory unit AE can be exchanged with the individual memory 7 and the strain gauge 20.
  • This may prove necessary in the context of aging of the injector 8 and / or individual memory 7.
  • Similar replacement processes as in the case of an injector 8 can thus take place when an individual accumulator 7 is aging by exchanging the individual accumulator 7 with pressure sensor 20 and accumulator S.
  • a similar replacement process can also be carried out for the rail 6 with pressure sensor 10 and memory S relating to the logic and memory unit ACR; this time by separating the memory S from the logic unit A of the logic and memory unit ACR.
  • a central electronics 9 and the locally distributed local electronics 12-for example, a logic and memory unit AI, AE or ACR with the central logic 1 1-- takes place in such a way that during operation of the common rail system 100th Measurement data such as the pressure curve at an injector 8 or at an individual memory 7 are transferred to the central electronics 9 under evaluation by the logic unit A, d. H. in evaluated form A (pI), A (pE), A (pCR).
  • the corresponding data or data relevant to the pressure history in the memory unit S of the high pressure component - e.g. stored in a memory unit S of the logic and memory unit AE and ACR and AI.
  • a high pressure component e.g. an injector 8 or a single memory 7 exchanged or set to another location, for example to another cylinder of the internal combustion engine
  • this high pressure component takes the relevant relevant for the injection process diagnostic data in the exchanged with memory unit S with. This also applies to a newly used high pressure component.
  • the logic system of locally distributed local electronics 12 and central electronics 9 thus also control and regulating aging-related developments descriptive, characteristic of the high-pressure component, individual measurement data available and can be used to control and regulate the overall system.
  • a time signal given by the central electronic unit 9 to the locally distributed local electronics 12 for initiating an injection process can also take place when high-pressure components are exchanged so that this is matched to the optionally individual properties of the injector 8 or the individual accumulator 7; whereby the individual characteristics can influence the pressure course.
  • the so implemented distributed distributed local electronics 12 from measuring device M1, M2 to Mi and local logic and memory unit A1 / S1, A2 / S2 ... Ai / Si for each of the components Bi has the advantage that comparatively short sensor lines between a sensor the measuring device Mi and a local logic and memory unit Ai / Si possible are. This allows z.
  • a high sampling frequency by the local logic and memory unit - namely in Figure 1, the AE, ACR-, here with A1 / S1, A2 / S2 are called, yet good signal quality.
  • a reduction in the signal quality (signal-to-noise ratio) due to a longer wiring harness is thus avoided.
  • a logic and memory unit Ai / Si, Aj / Sj a corresponding calculation model are stored with which a model-based block control, for. B. injector control or a corresponding diagnostic method is possible.
  • a model-based block control for. B. injector control or a corresponding diagnostic method is possible.
  • the implementation of parity equations, observer systems and parameter estimation methods are conceivable.
  • Signal-based diagnostic methods such as frequency analyzes or the like can also be implemented on the basis of the comparatively small sensor and actuator ratios.
  • the central electronics 9 and the injectors 8 or the rail 6, as symbolized by the components B1, B2, have the same time base sis.
  • the requirement of a precise knowledge of a crank angle, for example for an injector 8, a single memory 7 or a rail 6 is of lesser priority than heretofore.
  • pCR rail pressure E power-determining signal for example, an injection quantity nMot speed signal of the internal combustion engine

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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)
  • Fuel-Injection Apparatus (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

L'invention concerne un système à rampe commune d'injection de carburant (100) pour un moteur à combustion interne (1), comprenant : un rail (6) de carburant, et un injecteur (8) relié en communication fluidique, via une conduite haute pression, pour l'injection du carburant dans une chambre de travail du moteur à combustion interne (1), la conduite haute pression présentant un composant haute pression muni d'un accumulateur individuel (7), et le conduite haute pression et/ou le rail (6) présentant un dispositif manométrique (10, 20, 30). L'invention est caractérisée en ce que le dispositif manométrique est couplé avec une unité de logique et de mémoire locale (AE, ACR, AI) d'une électronique locale (12), répartie décentralisée, qui est configurée de manière à évaluer localement et à mémoriser des données de mesure du dispositif manométrique, en particulier des données d'injecteur et/ou des données du rail, en ce que le dispositif manométrique est relié, via un bus, à l'unité électronique centrale (9), avec interposition de l'unité de logique et de mémoire locale (AE, ACR, AI), et en ce que l'unité de logique et de mémoire locale (AE, ACR, AI) est conçue, en combinaison avec l'unité électronique centrale (9), pour la commande et/ou la régulation du système à rampe commune d'injection de carburant (100) pour le moteur à combustion interne (1).
EP12746284.4A 2011-08-16 2012-08-08 Système à rampe commune d'injection de carburant, moteur à combustion interne, et dispositif et procédé de commande et/ou de régulation d'un moteur à combustion interne Active EP2748450B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011080990A DE102011080990B3 (de) 2011-08-16 2011-08-16 Common-Rail-System, Brennkraftmaschine sowie Einrichtung und Verfahren zur Steuerung und/oder Regelung einer Brennkraftmaschine
PCT/EP2012/003379 WO2013023758A1 (fr) 2011-08-16 2012-08-08 Système à rampe commune d'injection de carburant, moteur à combustion interne, et dispositif et procédé de commande et/ou de régulation d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2748450A1 true EP2748450A1 (fr) 2014-07-02
EP2748450B1 EP2748450B1 (fr) 2016-06-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12746284.4A Active EP2748450B1 (fr) 2011-08-16 2012-08-08 Système à rampe commune d'injection de carburant, moteur à combustion interne, et dispositif et procédé de commande et/ou de régulation d'un moteur à combustion interne

Country Status (6)

Country Link
US (1) US9617962B2 (fr)
EP (1) EP2748450B1 (fr)
CN (1) CN103946524B (fr)
DE (1) DE102011080990B3 (fr)
HK (1) HK1200201A1 (fr)
WO (1) WO2013023758A1 (fr)

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Also Published As

Publication number Publication date
HK1200201A1 (en) 2015-07-31
WO2013023758A1 (fr) 2013-02-21
US20140209065A1 (en) 2014-07-31
US9617962B2 (en) 2017-04-11
CN103946524A (zh) 2014-07-23
DE102011080990B3 (de) 2013-01-24
EP2748450B1 (fr) 2016-06-22
CN103946524B (zh) 2017-02-15

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