DE102014007963A1 - Method for operating an internal combustion engine and engine control unit - Google Patents
Method for operating an internal combustion engine and engine control unit Download PDFInfo
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- DE102014007963A1 DE102014007963A1 DE102014007963.5A DE102014007963A DE102014007963A1 DE 102014007963 A1 DE102014007963 A1 DE 102014007963A1 DE 102014007963 A DE102014007963 A DE 102014007963A DE 102014007963 A1 DE102014007963 A1 DE 102014007963A1
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- 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
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
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- 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
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- 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
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
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- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
- F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/26—Details or accessories
- G01L23/32—Apparatus specially adapted for recording pressure changes measured by indicators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/08—Testing internal-combustion engines by monitoring pressure in cylinders
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- 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
- F02D2041/224—Diagnosis of the fuel system
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- 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
- F02D2041/3881—Common rail control systems with multiple common rails, e.g. one rail per cylinder bank, or a high pressure rail and a low pressure rail
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- 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
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- 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
- F02D2200/0614—Actual fuel mass or fuel injection amount
- F02D2200/0616—Actual fuel mass or fuel injection amount determined by estimation
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- 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
- F02D2200/0618—Actual fuel injection timing or delay, e.g. determined from fuel pressure drop
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- 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
- F02D41/008—Controlling each cylinder individually
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/24—Fuel-injection apparatus with sensors
- F02M2200/247—Pressure sensors
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- 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
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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)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Oil, Petroleum & Natural Gas (AREA)
Abstract
Verfahren zum Betreiben einer Schiffsdieselbrennkraftmaschine, insbesondere einer mit Schweröl betriebenen Schiffsdieselbrennkraftmaschine, wobei mit Injektoren (1) einer Kraftstoffversorgungsanlage, insbesondere einer Common-Rail Kraftstoffversorgungsanlage, in Zylinder der Schiffsdieselbrennkraftmaschine Kraftstoff eingespritzt wird, wobei unmittelbar an den Injektoren (1) mit Hilfe von den Injektoren (1) zugeordneten Drucksensoren (15) für jeden Injektor (1) individuell ein Drucksignal messtechnisch erfasst wird, und wobei aus jedem injektorindividuellen Drucksignal für jeden Injektor (1) individuell eine Einspritzrate und/oder eine Einspritzmenge und/oder mindestens eine Kenngröße eines hydraulischen Nadelhubtimings bestimmt wird.A method for operating a marine diesel engine, in particular a marine diesel engine operated with heavy oil, wherein injected with injectors (1) of a fuel supply system, in particular a common rail fuel supply system, in cylinders of the marine diesel engine, directly to the injectors (1) by means of the injectors (1) associated pressure sensors (15) for each injector (1) individually a pressure signal is detected by measurement, and wherein from each injector-specific pressure signal for each injector (1) individually an injection rate and / or an injection quantity and / or at least one characteristic of a hydraulic Nadelhubtimings is determined.
Description
Die Erfindung betrifft ein Verfahren zum Betreiben einer Schiffsdieselbrennkraftmaschine nach dem Oberbegriff des Anspruchs 1 und ein Motorsteuergerät zur Durchführung des Verfahrens.The invention relates to a method for operating a marine diesel engine according to the preamble of
Um den Betrieb einer solchen Schiffsdieselbrennkraftmaschine exakt steuern bzw. regeln zu können, ist es von Bedeutung, eine sogenannte Einspritzrate bzw. Einspritzmenge der Injektoren während des Betriebs der Brennkraftmaschine stets exakt zu ermitteln. Hierzu ist es bislang lediglich bekannt, den Injektoren Nadelhubsensoren zuzuordnen, mit Hilfe derer der mechanische Hub der Nadeln der Injektoren überwacht und ausgewertet werden kann, um auf diese Art und Weise die Einspritzrate und/oder Einspritzmenge der Injektoren zu ermitteln. Die Verwendung und Installation von Nadelhubsensoren an den Injektoren ist jedoch mit hohem Aufwand und hohen Kosten verbunden und daher für Serienanwendungen so gut wie nicht praktikabel. Darüber hinaus ist die Lebensdauer von Nadelhubsensoren abhängig von der Betriebssituation der Brennkraftmaschine. Insbesondere bei mit Schweröl betriebenen Schiffsdieselbrennkraftmaschinen ist die Lebensdauer von Nadelhubsensoren stark limitiert.In order to be able to control or regulate the operation of such a marine diesel engine precisely, it is important to always precisely determine a so-called injection rate or injection quantity of the injectors during operation of the internal combustion engine. For this purpose, it is hitherto only known to associate the injectors needle lift sensors, by means of which the mechanical stroke of the needles of the injectors can be monitored and evaluated in order to determine the injection rate and / or injection quantity of the injectors in this manner. However, the use and installation of needle lift sensors on the injectors is associated with high costs and high costs and therefore virtually impossible for series applications. In addition, the life of needle lift sensors depends on the operating situation of the internal combustion engine. Especially in marine diesel engines powered by heavy oil, the life of needle lift sensors is severely limited.
Es besteht daher Bedarf an einem Verfahren zum Betreiben einer Schiffsdiesel-Brennkraftmaschine und einem Motorsteuergerät zur Durchführung des Verfahrens, mit Hilfe derer mit geringem Aufwand, geringen Kosten sowie einfach und zuverlässig insbesondere die Einspritzrate und/oder die Einspritzmenge von Injektoren der Schiffsdieselbrennkraftmaschine ermittelt werden kann.There is therefore a need for a method for operating a ship diesel internal combustion engine and an engine control unit for carrying out the method, with the help of which with little effort, low cost and easy and reliable in particular the injection rate and / or the injection quantity of injectors of the marine diesel engine can be determined.
Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein neuartiges Verfahren zum Betreiben einer Schiffsdieselbrennkraftmaschine zu schaffen. Diese Aufgabe wird durch ein Verfahren nach Anspruch 1 gelöst. Erfindungsgemäß wird unmittelbar an den Injektoren mit Hilfe von den Injektoren zugeordneten Drucksensoren für jeden Injektor individuell ein Drucksignal messtechnisch erfasst, wobei aus jedem injektorindividuellen Drucksignal für jeden Injektor individuell eine Einspritzrate und/oder eine Einspritzmenge und/oder mindestens eine Kenngröße eines hydraulischen Nadelhubtimings bestimmt wird.On this basis, the present invention has the object to provide a novel method for operating a marine diesel engine. This object is achieved by a method according to
Es liegt im Sinne der hier vorliegenden Erfindung, an den Injektoren der Kraftstoffversorgungsanlage der Schiffsdieselbrennkraftmaschine ein injektorindividuelles Drucksignal messtechnisch zu erfassen. Aus den injektorindividuellen Drucksignalen wird für jeden Injektor eine injektorindividuelle Einspritzrate und/oder eine injektorindividuelle Einspritzmenge und/oder mindestens eine individuelle Kenngröße des hydraulischen Nadelhubtimings bestimmt. Auf die Verwendung von Nadelhubsensoren kann gänzlich verzichtet werden. Die Ermittlung der Drucksignale mit Hilfe von Drucksensoren ist einfach, kostengünstig und zuverlässig auch an mit Schweröl betriebenen Schiffsdieselbrennkraftmaschinen möglich. Aus dem injektorindividuellen Drucksignal kann der oder jede gewünschte Parameter, nämlich die Einspritzrate und/oder die Einspritzmenge und/oder die oder jede Kenngröße des hydraulischen Nadelhubtimings, einfach und zuverlässig bestimmt werden.It is within the meaning of the present invention to detect an injector-specific pressure signal by measurement at the injectors of the fuel supply system of the marine diesel engine. From the injector-specific pressure signals, an injector-individual injection rate and / or an injector-individual injection quantity and / or at least one individual parameter of the hydraulic needle lift timing is determined for each injector. The use of Nadelhubsensoren can be dispensed with entirely. The determination of the pressure signals by means of pressure sensors is simple, inexpensive and reliable even on heavy fuel oil powered marine diesel engine possible. From the injector-specific pressure signal, the or each desired parameter, namely the Injection rate and / or the injection quantity and / or the or each characteristic of the hydraulic Nadelhubtimings be determined easily and reliably.
Vorzugsweise weist jeder Injektor ein individuelles Injektor-Speichervolumen auf, wobei mit Hilfe der Drucksensoren für jeden Injektor als individuelles Drucksignal ein Speicherdrucksignal des jeweiligen Injektor-Speichervolumens messtechnisch erfasst wird, und wobei aus jedem injektorindividuellen Speicherdrucksignal für jeden Injektor individuell die Einspritzrate und/oder die Einspritzmenge und/oder die oder jede Kenngröße des hydraulischen Nadelhubtimings bestimmt wird.Preferably, each injector has an individual injector storage volume, wherein a storage pressure signal of the respective injector storage volume is detected by means of the pressure sensors for each injector as an individual pressure signal, and from each injector-specific storage pressure signal for each injector individually the injection rate and / or the injection quantity and / or the or each characteristic of the hydraulic needle lift timing is determined.
Dann, wenn als Drucksignal am jeweiligen Injektor ein Speicherdrucksignal des Injektor-Speichervolumens des jeweiligen Injektors ermittelt wird, kann aus dem Drucksignal besonders vorteilhaft die Einspritzrate und/oder die Einspritzmenge und/oder die oder jede Kenngröße des hydraulischen Nadelhubtimings bestimmt werden. Das injektorindividuelle Speicherdrucksignal wird durch Einflüsse anderer Komponenten der Kraftstoffversorgungsanlage nicht beeinflusst, sodass dann eine besonders genaue und zuverlässige Ermittlung mindestens eines der obigen Parameter nämlich der Einspritzrate und/oder der Einspritzmenge und/oder der oder jeder Kenngröße des hydraulischen Nadelhubtimings, möglich ist.Then, if a memory pressure signal of the injector storage volume of the respective injector is determined as a pressure signal at the respective injector, the injection rate and / or the injection quantity and / or the or each characteristic of the hydraulic needle lift timing can be determined from the pressure signal particularly advantageous. The injector-specific accumulator pressure signal is not influenced by influences of other components of the fuel supply system, so that a particularly accurate and reliable determination of at least one of the above parameters namely the injection rate and / or the injection quantity and / or the or each characteristic of the hydraulic Nadelhubtimings is possible.
Nach einer vorteilhaften Weiterbildung wird das messtechnisch erfasste injektorindividuelle Drucksignal nach der Zeit abgeleitet bzw. differenziert, wobei aus dem differenzierten injektorindividuellen Drucksignal die Einspritzrate und/oder die Einspritzmenge und/oder die oder jede Kenngröße des hydraulischen Nadelhubtimings des jeweiligen Injektors bestimmt wird. Diese Auswertung des Drucksignals zur Bestimmung der Einspritzrate und/oder der Einspritzmenge und/oder der oder jeder Kenngröße des hydraulischen Nadelhubtimings ist besonders bevorzugt, da zuverlässig, einfach und genau.According to an advantageous development, the metrologically detected injector-individual pressure signal is derived or differentiated according to time, wherein the injection rate and / or the injection quantity and / or the or each characteristic of the hydraulic needle lift timing of the respective injector is determined from the differentiated injector-specific pressure signal. This evaluation of the pressure signal for determining the injection rate and / or the injection quantity and / or the or each characteristic of the hydraulic needle lift timing is particularly preferred since reliable, simple and accurate.
Vorzugsweise wird aus dem differenzierten injektorindividuellen Drucksignal die Einspritzrate des jeweiligen Injektors nach folgender Gleichung bestimmt:
Vorzugsweise wird aus dem injektorindividuellen Drucksignal für jeden Injektor individuell als Kenngröße des hydraulischen Nadelhubtimings für Einspritztakte des jeweiligen Injektors ein Einspritzbeginn und/oder ein Erreichen des hydraulischen Maximalhubs und/oder ein Verlassen des hydraulischen Maximalhubs und/oder ein Einspritzende bestimmt.Preferably, an injection start and / or reaching the maximum hydraulic stroke and / or leaving the maximum hydraulic stroke and / or an injection end is determined individually from the injector-specific pressure signal for each injector as a parameter of the hydraulic needle lift timing for injection injectors of the respective injector.
An dieser Stelle sei darauf hingewiesen, dass sich das hydraulische Nadelhubtiming vom mechanischen Nadelhubtiming unterscheidet.It should be noted that the hydraulic needle stroke timing differs from the mechanical needle stroke timing.
So entspricht der hydraulische Maximalhub demjenigen Nadelhub, bei dem die Drosselwirkung des Nadelsitzes des Injektors gleich oder kleiner der Drosselwirkung der Düsenlöcher bzw. Spritzlöcher des jeweiligen Injektors ist. Ab diesem Zeitpunkt bleibt der hydraulische Düsendurchfluss der Düse des Injektors konstant, der mechanische Maximalhub kann hingegen weiter ansteigen.Thus, the maximum hydraulic stroke corresponds to the needle stroke in which the throttling action of the needle seat of the injector is equal to or less than the throttling action of the nozzle holes or injection holes of the respective injector. From this time, the hydraulic nozzle flow of the nozzle of the injector remains constant, the mechanical maximum stroke, however, can continue to increase.
Ein weiterer Unterschied zwischen dem mechanischen Nadelhubtiming und dem hydraulischen Nadelhubtiming besteht darin, dass sich mit dem Verlassen des hydraulischen Maximalhubs der Düsendurchfluss des Injektors verringert, also die Drosselwirkung des Nadelsitzes des jeweiligen Injektors größer als die Drosselwirkung der Düsenlöcher ist. Das mechanische Verlassen des mechanischen Maximalhubs hingegen erfolgt typischerweise vorher.Another difference between the mechanical Nadelhubtiming and the hydraulic Nadelhubtiming is that decreases with the leaving the hydraulic maximum stroke of the nozzle flow of the injector, so the throttle effect of the needle seat of each injector is greater than the throttle effect of the nozzle holes. The mechanical leaving the mechanical maximum stroke, however, is typically done before.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Die hier vorliegende Erfindung betrifft ein Verfahren zum Betreiben einer Schiffsdieselbrennkraftmaschine, insbesondere einer mit Schweröl betriebenen Schiffsdieselbrennkraftmaschine, wobei eine solche Schiffsdieselbrennkraftmaschine über eine Kraftstoffversorgungsanlage verfügt, die vorzugsweise als Common-Rail Kraftstoffversorgungsanlage ausgebildet ist. Der grundsätzliche Aufbau einer solchen Common-Rail Kraftstoffversorgungsanlage einer Schiffsdieselbrennkraftmaschine wurde bereits unter Bezugnahme auf
Gemäß
Vorzugsweise weist jeder Injektor
Erfindungsgemäß wird weiterhin aus jedem injektorindividuellen Drucksignal für jeden Injektor
Es sei an dieser Stelle darauf hingewiesen, dass sich das hydraulische Nadelhubtiming vom mechanischen Nadelhubtiming unterscheidet. So wird der hydraulische Maximalhub bei einem Nadelhub erreicht, bei welchem die Drosselwirkung des Nadelsitzes des jeweiligen Injektors
Vorzugsweise wird das messtechnisch erfasste, injektorindividuelle Drucksignal, vorzugsweise das injektorindividuelle Speicherdrucksignal, nach der Zeit t abgeleitet bzw. differenziert, wobei aus dem differenzierten, injektorindividuellen Drucksignal die Einspritzrate und/oder die Einspritzmenge und/oder die oder jede Kenngröße des hydraulischen Nadelhubtimings des jeweiligen Injektors bestimmt wird. Aus dem differenzierten, injektorindividuellen Drucksignal, bei welchem es sich vorzugsweise um das differenzierte Speicherdrucksignal handelt, wird die Einspritzrate des jeweiligen Injektors vorzugsweise nach folgender Gleichung bestimmt:
Die vom Druck abhängige Schallgeschwindigkeit wird dabei vorzugsweise abhängig vom gemessenen, injektorindividuellen Druck auf Grundlage einer Kennlinie oder eines Kennfelds ermittelt.The speed of sound dependent on the pressure is preferably determined as a function of the measured, injector-specific pressure on the basis of a characteristic curve or a characteristic diagram.
Aus der oben bestimmten Einspritzrate kann durch Integration derselben über der Zeit die Einspritzmenge des jeweiligen Injektors
In
Wie bereits oben ausgeführt, wird vorzugsweise aus dem differenzierten, injektorindividuellen Drucksignal
Wie
Aus diesen Kenngrößen kann gemäß dem Signalverlauf
In
Mit Hilfe der hier vorliegenden Erfindung kann einfach und zuverlässig während des Betriebs einer Schiffsdieselbrennkraftmaschine eine Einspritzrate von Injektoren und/oder eine Einspritzmenge der Injektoren und/oder mindestens eine Kenngröße eines hydraulischen Nadelhubtimings der Injektoren ermittelt werden.With the aid of the present invention, an injection rate of injectors and / or an injection quantity of the injectors and / or at least one parameter of a hydraulic needle lift timing of the injectors can be determined simply and reliably during the operation of a marine diesel engine.
Auf Basis mindestens eines der obigen aus dem injektorindividuellen Drucksignal ermittelten Parameter kann eine Funktionsdiagnose und/oder Verschleißdiagnose für den jeweiligen Injektor
Mit Hilfe des erfindungsgemäßen Verfahrens kann für jeden Zylinder individuell exakt zum Beispiel die Einspritzrate bzw. Einspritzmenge bestimmt werden. Hiermit ist dann eine zylinderindividuelle Regelung des Betriebs der Brennkraftmaschine möglich. Insbesondere eignet sich das Verfahren zur Verwendung bei mit Schweröl betriebenen Schiffsdieselbrennkraftmaschinen.With the aid of the method according to the invention, the injection rate or injection quantity can be determined individually for each individual cylinder individually, for example. This is then a cylinder-individual control of the operation of the internal combustion engine possible. In particular, the method is suitable for use in heavy fuel oil marine diesel engines.
Die Erfindung betrifft weiterhin ein Motorsteuergerät
Mit Hilfe des erfindungsgemäßen Verfahrens sowie des erfindungsgemäßen Motorsteuergeräts
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Injektorinjector
- 22
- Hochdruckpumpehigh pressure pump
- 33
- Pumpeinrichtungpumping device
- 44
- NiederdruckbereichLow pressure area
- 55
- NiederdruckpumpeLow pressure pump
- 66
- HochdruckbereichHigh pressure area
- 77
- DruckspeichersystemAccumulator system
- 88th
- HochdruckpumpenspeicherHigh-pressure pumps memory
- 99
- Speichereinheitstorage unit
- 1010
- HochdruckleitungHigh-pressure line
- 1111
- HochdruckleitungHigh-pressure line
- 1212
- Schaltventilswitching valve
- 1313
- DruckbegrenzungsventilPressure relief valve
- 1414
- Spülventilflush valve
- 1515
- Drucksensorpressure sensor
- 1616
- MotorsteuergerätEngine control unit
- 17 17
- Schnittstelleninterfaces
- 1818
- hardwareseitige Mittelhardware resources
- 1919
- softwareseitige Mittelsoftware resources
- 2020
- Signalverlaufwaveform
- 2121
- Signalverlaufwaveform
- 2222
- Signalverlaufwaveform
- 2323
- Signalverlaufwaveform
- 2424
- Signalverlaufwaveform
- 2525
- Signalverlaufwaveform
- 2626
- Signalverlaufwaveform
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10157135 B4 [0002] DE 10157135 B4 [0002]
Claims (9)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014007963.5A DE102014007963A1 (en) | 2014-06-04 | 2014-06-04 | Method for operating an internal combustion engine and engine control unit |
FI20155317A FI129818B (en) | 2014-06-04 | 2015-04-29 | Method for operating an internal combustion engine and engine control unit |
KR1020150067028A KR102184034B1 (en) | 2014-06-04 | 2015-05-14 | Method for operating an internal combustion engine and engine control unit |
JP2015107284A JP6522423B2 (en) | 2014-06-04 | 2015-05-27 | Operating method of internal combustion engine and engine control unit |
CN201510303023.4A CN105275649B (en) | 2014-06-04 | 2015-06-04 | Method for operating an internal combustion engine and engine control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102014007963.5A DE102014007963A1 (en) | 2014-06-04 | 2014-06-04 | Method for operating an internal combustion engine and engine control unit |
Publications (1)
Publication Number | Publication Date |
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DE102014007963A1 true DE102014007963A1 (en) | 2015-12-17 |
Family
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Family Applications (1)
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DE102014007963.5A Pending DE102014007963A1 (en) | 2014-06-04 | 2014-06-04 | Method for operating an internal combustion engine and engine control unit |
Country Status (5)
Country | Link |
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JP (1) | JP6522423B2 (en) |
KR (1) | KR102184034B1 (en) |
CN (1) | CN105275649B (en) |
DE (1) | DE102014007963A1 (en) |
FI (1) | FI129818B (en) |
Cited By (4)
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WO2017194283A1 (en) * | 2016-05-12 | 2017-11-16 | Robert Bosch Gmbh | Method for fault diagnosis in an internal combustion engine |
CN108757254A (en) * | 2018-06-28 | 2018-11-06 | 武汉理工大学 | Bunker fuel oil fuel injection system test-bed |
DE102018104848B3 (en) | 2018-03-02 | 2019-07-04 | Mtu Friedrichshafen Gmbh | Distribution device of a common rail system |
WO2021144115A1 (en) * | 2020-01-17 | 2021-07-22 | Bayerische Motoren Werke Aktiengesellschaft | Method for checking the functionality of an injector |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017215043A1 (en) * | 2017-08-29 | 2019-02-28 | Continental Automotive Gmbh | Method and device for determining the injection quantity or the injection rate of a fluid injected by means of an injector into a reaction space |
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DE10157135B4 (en) | 2001-11-21 | 2004-03-11 | Man B & W Diesel Ag | Fuel supply system in the form of a common rail system of an internal combustion engine with several cylinders |
DE10344181A1 (en) * | 2003-09-24 | 2005-04-28 | Mtu Friedrichshafen Gmbh | Method for controlling and regulating an internal combustion engine |
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- 2015-05-14 KR KR1020150067028A patent/KR102184034B1/en active IP Right Grant
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DE3126393A1 (en) * | 1980-07-03 | 1982-04-22 | Lucas Industries Ltd., Birmingham, West Midlands | FUEL INJECTION SYSTEM FOR A DIESEL ENGINE |
DE3118425A1 (en) * | 1981-05-09 | 1982-12-09 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR DETECTING THE AMOUNT OF FUEL SUPPLIED TO THE COMBUSTION SPACES OF A DIESEL ENGINE |
DE10157135B4 (en) | 2001-11-21 | 2004-03-11 | Man B & W Diesel Ag | Fuel supply system in the form of a common rail system of an internal combustion engine with several cylinders |
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DE102007052096A1 (en) * | 2007-10-31 | 2009-05-14 | Continental Automotive Gmbh | Method of identifying a fuel grade |
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WO2017194283A1 (en) * | 2016-05-12 | 2017-11-16 | Robert Bosch Gmbh | Method for fault diagnosis in an internal combustion engine |
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WO2021144115A1 (en) * | 2020-01-17 | 2021-07-22 | Bayerische Motoren Werke Aktiengesellschaft | Method for checking the functionality of an injector |
Also Published As
Publication number | Publication date |
---|---|
CN105275649A (en) | 2016-01-27 |
KR102184034B1 (en) | 2020-11-27 |
FI129818B (en) | 2022-09-15 |
JP6522423B2 (en) | 2019-05-29 |
KR20150139771A (en) | 2015-12-14 |
CN105275649B (en) | 2021-01-15 |
JP2015230004A (en) | 2015-12-21 |
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