DE102013224414A1 - Method for operating a fluid delivery system - Google Patents
Method for operating a fluid delivery system Download PDFInfo
- Publication number
- DE102013224414A1 DE102013224414A1 DE102013224414.2A DE102013224414A DE102013224414A1 DE 102013224414 A1 DE102013224414 A1 DE 102013224414A1 DE 102013224414 A DE102013224414 A DE 102013224414A DE 102013224414 A1 DE102013224414 A1 DE 102013224414A1
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- Germany
- Prior art keywords
- pressure
- delivery system
- pressure pump
- low
- throttle
- 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.)
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Classifications
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
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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
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
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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
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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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
- F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
-
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
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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
- F02D41/3082—Control of electrical fuel pumps
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Verfahren zum Betreiben eines Fluidfördersystems, aufweisend ein Niederdruckfördersystem mit zumindest einem Tank 1, einer Niederdruckpumpe 2 und einem Drucksensor 7, sowie aufweisend ein Hochdruckfördersystem mit einer Hochdruckpumpe 9 und einem mit einem Hochdruckpumpenraum 8 verschalteten Druckregelventil 20 und einer Drossel 21. Erfindungsgemäß wird ein Verfahren zum Betreiben eines Fluidfördersystems angegeben, das die Leckage des Fluidfördersystems verringert. Mit Leckage ist die Rücklaufmenge der Hochdruckpumpe 9 gemeint. Erreicht wird dies dadurch, dass das Druckregelventil 20 auf einen Öffnungsdruck im Bereich eines Soll-Innendrucks des Hochdruckpumpenraums 8 eingestellt ist und dass die Förderleistung der Niederdruckpumpe 2 von dem Drucksensor gesteuert wird.A method of operating a fluid delivery system comprising a low pressure delivery system having at least one tank 1, a low pressure pump 2 and a pressure sensor 7, and comprising a high pressure delivery system having a high pressure pump 9 and a pressure control valve 20 connected to a high pressure pumping space 8 and a throttle 21 Operating a fluid delivery system indicated that reduces the leakage of the fluid delivery system. With leakage, the return amount of the high-pressure pump 9 is meant. This is achieved in that the pressure control valve 20 is set to an opening pressure in the range of a target internal pressure of the high pressure pump chamber 8 and that the delivery rate of the low pressure pump 2 is controlled by the pressure sensor.
Description
Die Erfindung betrifft ein Verfahren zum Betreiben eines Fluidfördersystems, aufweisend ein Niederdruckfördersystem mit zumindest einem Tank, einer Niederdruckpumpe und einem Drucksensor, sowie aufweisend ein Hochdruckfördersystem mit einer Hochdruckpumpe und einem mit einem Hochdruckpumpenraum verschalteten Druckregelventil und einer Drossel. Weiterhin betrifft die Erfindung ein entsprechend ausgestaltetes Fluidfördersystem. The invention relates to a method for operating a fluid delivery system, comprising a low-pressure delivery system with at least one tank, a low-pressure pump and a pressure sensor, and comprising a high-pressure delivery system with a high-pressure pump and a pressure-regulating valve connected to a high-pressure pump chamber and a throttle. Furthermore, the invention relates to a suitably designed fluid delivery system.
Stand der TechnikState of the art
Ein derartiges Fluidfördersystem ist aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Betreiben eines Fluidfördersystems anzugeben, das die Leckage des Fluidfördersystems verringert. Weiterhin soll ein entsprechendes Fluidfördersystem angegeben werden. The invention has for its object to provide a method for operating a fluid delivery system, which reduces the leakage of the fluid delivery system. Furthermore, a corresponding fluid delivery system should be specified.
Offenbarung der ErfindungDisclosure of the invention
Vorteile der ErfindungAdvantages of the invention
Diese Aufgabe wird dadurch gelöst, dass das Druckregelventil auf einen Öffnungsdruck im Bereich eines Soll-Innendrucks des Hochdruckpumpenraums eingestellt ist. Durch diese Einstellung des Öffnungsdrucks wird die Leckage des Fluidfördersystems reduziert. Hierbei ist die Leckage die Rücklaufmange der Hochdruckpumpe, die normalerweise in den Tank zurückgeführt wird.This object is achieved in that the pressure control valve is set to an opening pressure in the range of a desired internal pressure of the high-pressure pump chamber. This adjustment of the opening pressure reduces the leakage of the fluid delivery system. Here, the leakage is the Rücklaufmange the high-pressure pump, which is normally returned to the tank.
In Weiterbildung der Erfindung ist die Niederdruckpumpe als geregelte elektrisch angetriebene Niederdruckpumpe ausgebildet, deren Förderleistung von dem Drucksensor gesteuert wird. Durch diese Ausgestaltung beziehungsweise dieses Verfahren ist es möglich, die Förderleistung der Niederdruckpumpe an die Erfordernisse in dem Fluidfördersystem, insbesondere den gewünschten Soll-Innendruck in dem Hochdruckpumpenraum der Hochdruckpumpe, genau anzupassen, so dass im Ergebnis durch diese Maßnahme die Leckage ebenfalls reduziert wird.In a further development of the invention, the low-pressure pump is designed as a regulated electrically driven low-pressure pump whose delivery rate is controlled by the pressure sensor. By means of this embodiment or this method, it is possible to precisely adapt the delivery rate of the low-pressure pump to the requirements in the fluid delivery system, in particular the desired nominal internal pressure in the high-pressure pump chamber of the high-pressure pump, so that as a result the leakage is likewise reduced by this measure.
In weiterer Ausgestaltung der Erfindung ist die Drossel mit einer flachen Drosselkennlinie ausgelegt. Dadurch kann die geregelte elektrisch angetriebene Niederdruckpumpe den Arbeitsdruck in dem Fluidfördersystem anfahren und im Arbeitsbereich der flachen Drosselkennlinie folgen. Diese Maßnahme begrenzt ebenfalls die Leckage. Weitere Vorteile des so ausgebildeten Verfahrens sind, dass der Arbeitsdruck der Hochdruckpumpe in dem Hochdruckpumpenraum schneller erreicht wird und dass das Druckregelventil mit der nachgeschalteten Drossel einen Auslaufschutz für den Hochdruckpumpenraum bildet.In a further embodiment of the invention, the throttle is designed with a flat throttle characteristic. As a result, the regulated electrically driven low-pressure pump can approach the working pressure in the fluid delivery system and follow the flat throttle characteristic in the working range. This measure also limits the leakage. Further advantages of the method designed in this way are that the working pressure of the high-pressure pump in the high-pressure pump chamber is reached more quickly and that the pressure-regulating valve with the downstream throttle forms a leakage protection for the high-pressure pump chamber.
Das entsprechende Fluidfördersystem ist dadurch gekennzeichnet, dass das Druckregelventil ein Ventilgehäuse mit einer in dem Ventilgehäuse eingebauten Drossel aufweist. Diese die Leckage des Fluidfördersystems verringernde Ausgestaltung hat zudem den Vorteil eines kompakten und preiswert umsetzbaren Drosselventils mit der zusätzlichen Drossel.The corresponding fluid delivery system is characterized in that the pressure regulating valve has a valve housing with a throttle built into the valve housing. This embodiment, which reduces the leakage of the fluid delivery system, also has the advantage of a compact throttle valve that can be implemented inexpensively with the additional throttle.
In Weiterbildung der Erfindung weist das Druckregelventil eine mit einem Ventilsitz in dem Ventilgehäuse zusammenwirkende Ventilkugel und eine Ventilfeder auf, wobei ein Ventilfederhalter als Drossel ausgebildet ist. Diese Ausgestaltung ist besonders vorteilhaft, da dadurch für die Drossel keine zusätzlichen Bauteile benötigt werden.In a further development of the invention, the pressure regulating valve has a valve ball cooperating with a valve seat in the valve housing and a valve spring, wherein a valve spring holder is designed as a throttle. This embodiment is particularly advantageous because no additional components are required for the throttle.
Zudem begrenzt das der Drossel vorgeschaltete Druckregelventil die Leckage vor Erreichen des Arbeitsdrucks in dem Pumpenraum.In addition, the pressure regulating valve upstream of the throttle limits the leakage before reaching the working pressure in the pump chamber.
In weiterer Ausgestaltung der Erfindung ist die Niederdruckpumpe eine steuerbare elektrisch angetriebene Niederdruckpumpe. Dabei kann die Niederdruckpumpe beispielsweise als Zahnradpumpe oder Kolbenpumpe ausgebildet sein. Der elektrische Antrieb der Niederdruckpumpe ermöglicht es, in einfacher Weise die Förderleistung der Niederdruckpumpe auf entsprechende Anforderungen einzustellen. In a further embodiment of the invention, the low-pressure pump is a controllable electrically driven low-pressure pump. In this case, the low-pressure pump may be formed, for example, as a gear pump or piston pump. The electric drive of the low-pressure pump makes it possible to easily adjust the flow rate of the low-pressure pump to appropriate requirements.
In Weiterbildung der Erfindung ist die Druckseite der Niederdruckpumpe über ein Sicherheitsventil mit dem Tank verschaltet. Diese Ausgestaltung stellt sicher, dass im Falle eines Verstopfens eines nachgeschalteten Filters der von der Niederdruckpumpe aufgebaute Druck begrenzt beziehungsweise in den Tank abgesteuert wird. In a further development of the invention, the pressure side of the low-pressure pump is connected via a safety valve to the tank. This embodiment ensures that in the case of a clogged downstream filter, the pressure built up by the low-pressure pump is limited or diverted into the tank.
In Weiterbildung der Erfindung ist das Fluidfördersystem ein Kraftstofffördersystem und das Fluid entsprechend Kraftstoff. Wenn auch der Gegenstand der Erfindung bei einem beliebigen Fluidfördersystem angewendet werden kann, ist die bevorzugte Anwendung bei einem Kraftstofffördersystem für eine Brennkraftmaschine gegeben, wobei mit dem Kraftstofffördersystem beispielsweise Benzin oder insbesondere Diesel gefördert wird. Dabei ist das Kraftstofffördersystem bevorzugt als ein Common-Rail-Einspritzsystem ausgebildet, bei dem der Kraftstoff in einem Hochdruckspeicher gespeichert wird und aus dem Hochdruckspeicher von Injektoren zur Einspritzung in zugeordnete Brennräume der Brennkraftmaschine aus dem Hochdruckspeicher entnommen wird. In a development of the invention, the fluid delivery system is a fuel delivery system and the fluid is fuel. While the object of the invention may be applied to any fluid delivery system, the preferred application is in a fuel delivery system for an internal combustion engine, with the fuel delivery system delivering, for example, gasoline or, more particularly, diesel. In this case, the fuel delivery system is preferably designed as a common-rail injection system in which the fuel is stored in a high pressure accumulator and is taken from the high pressure accumulator of injectors for injection into associated combustion chambers of the engine from the high pressure accumulator.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der ein in den Figuren dargestelltes Ausführungsbeispiel der Erfindung näher beschrieben ist.Further advantageous embodiments of the invention are described in the drawings, in which an illustrated in the figures embodiment of the invention is described in detail.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Es zeigen:Show it:
Ausführungsform der ErfindungEmbodiment of the invention
Das Schaltschema gemäß
Der in dem Hochdruckspeicher
Die Nockenwelle der Hochdruckpumpe
Das Druckregelventil
In dem Diagramm gemäß
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 102008043643 A1 [0002] DE 102008043643 A1 [0002]
Claims (10)
Priority Applications (1)
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DE102013224414.2A DE102013224414A1 (en) | 2013-11-28 | 2013-11-28 | Method for operating a fluid delivery system |
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DE102013224414.2A DE102013224414A1 (en) | 2013-11-28 | 2013-11-28 | Method for operating a fluid delivery system |
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DE102013224414A1 true DE102013224414A1 (en) | 2015-05-28 |
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DE102013224414.2A Pending DE102013224414A1 (en) | 2013-11-28 | 2013-11-28 | Method for operating a fluid delivery system |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108533435A (en) * | 2018-06-19 | 2018-09-14 | 潍柴动力股份有限公司 | A kind of high pressure co-rail system and high-pressure oil pump diagnostic method and device |
CN115126637A (en) * | 2022-07-20 | 2022-09-30 | 潍柴动力股份有限公司 | Injection pump detection device, high-pressure common rail fuel system and automobile |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008043643A1 (en) | 2007-11-29 | 2009-06-04 | Robert Bosch Gmbh | Fuel injection system for an internal combustion engine with HC injector |
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2013
- 2013-11-28 DE DE102013224414.2A patent/DE102013224414A1/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008043643A1 (en) | 2007-11-29 | 2009-06-04 | Robert Bosch Gmbh | Fuel injection system for an internal combustion engine with HC injector |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108533435A (en) * | 2018-06-19 | 2018-09-14 | 潍柴动力股份有限公司 | A kind of high pressure co-rail system and high-pressure oil pump diagnostic method and device |
CN115126637A (en) * | 2022-07-20 | 2022-09-30 | 潍柴动力股份有限公司 | Injection pump detection device, high-pressure common rail fuel system and automobile |
CN115126637B (en) * | 2022-07-20 | 2024-02-20 | 潍柴动力股份有限公司 | High-pressure common rail fuel system and automobile |
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