DE102006006557A1 - Fuel injection system e.g. common rail system, has fuel tank, high-pressure pump and cooling component, which cools fuel integrated into injector return pipe between injector and inlet of pump return pipe - Google Patents
Fuel injection system e.g. common rail system, has fuel tank, high-pressure pump and cooling component, which cools fuel integrated into injector return pipe between injector and inlet of pump return pipe Download PDFInfo
- Publication number
- DE102006006557A1 DE102006006557A1 DE102006006557A DE102006006557A DE102006006557A1 DE 102006006557 A1 DE102006006557 A1 DE 102006006557A1 DE 102006006557 A DE102006006557 A DE 102006006557A DE 102006006557 A DE102006006557 A DE 102006006557A DE 102006006557 A1 DE102006006557 A1 DE 102006006557A1
- Authority
- DE
- Germany
- Prior art keywords
- injector
- fuel
- return line
- pump
- pressure pump
- 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.)
- Ceased
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 54
- 239000002828 fuel tank Substances 0.000 title claims abstract description 29
- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 238000002347 injection Methods 0.000 title claims abstract description 16
- 239000007924 injection Substances 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 claims description 2
- 239000003225 biodiesel Substances 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- 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
- F02M37/0064—Layout or arrangement of systems for feeding fuel for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
-
- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Um den Betrieb mit Biodiesel zu ermöglichen, wird ein Kraftstoffeinspritz-System vorgestellt. Es umfasst einen Kraftstofftank (10), eine Hochdruckpumpe (12), durch welche in einem Druckspeicher (14) Kraftstoff komprimierbar ist, eine Zuleitung (20), über welche Kraftstoff von dem Kraftstofftank (10) zu der Hochdruckpumpe (12) zuleitbar ist, und einen an den Druckspeicher (14) angeschlossenen Injektor (16). Eine an den Injektor (16) angeschlossene Injektorrücklaufleitung (22), über welche Kraftstoff zu dem Kraftstofftank (10) rückführbar ist, umfasst ein Kühlelement (18), welches möglichst nahe am Injektor eingebaut ist. Eine rasche Kühlung kann auch mittels einer Vermischung des Rückflusses von der Hochdruckpumpe (12) mit dem Rückfluss von dem Injektor (16) erzielt werden.Around to enable operation with biodiesel, a fuel injection system is presented. It includes one Fuel tank (10), a high pressure pump (12) through which in one Accumulator (14) Fuel is compressible, a supply line (20), above which fuel from the fuel tank (10) to the high pressure pump (12) can be fed, and one to the pressure accumulator (14) connected Injector (16). An injector return line connected to the injector (16) (22) about which Fuel to the fuel tank (10) is traceable, comprising a cooling element (18), which as possible is installed near the injector. A quick cooling can also by means of a Mixing of the reflux from the high pressure pump (12) with the return flow from the injector (16) become.
Description
Die vorliegende Erfindung betrifft ein Kraftstoffeinspritz-System nach dem Oberbegriff des Patentanspruchs 1.The The present invention relates to a fuel injection system according to the preamble of claim 1
Das Betreiben eines Kraftstoffeinspritz-Systems, insbesondere eines Commonrail-Systems, mit Biodiesel ist problematisch, da es öfters zu verstopften Kraftstofffiltern kommt. Dieser Fehler tritt nach nicht vorhersehbarer und kurzer Betriebsdauer auf, typischerweise zwischen 2000 km und 15000 km.The Operating a fuel injection system, in particular one Commonrail system, with biodiesel is problematic as it is often too clogged fuel filters comes. This error does not occur foreseeable and short operating time, typically between 2000 km and 15000 km.
Ein weiters Problem stellen Ablagerungen in der Hochdruckpumpe des Commonrail-Systems und in den Injektoren dar, welche zu einer deutlich verkürzten Lebensdauer führen.One Another problem is deposits in the high-pressure pump of the Commonrail system and in the injectors, resulting in a significantly reduced life to lead.
Sowohl die Filterverstopfungen als auch die Ablagerungen werden bei Betrieb mit Biodiesel durch die folgenden Parameter verursacht:
- – Qualität des Biodiesels, die insbesondere durch die Oxidationszahl und den Säuregehalt bestimmt wird;
- – Die maximale Kraftstofftemperatur
- – Die Zeitdauer, während welcher der Kraftstoff dieser Temperatur ausgesetzt ist
- - quality of biodiesel, determined in particular by the oxidation number and acidity;
- - The maximum fuel temperature
- - The period during which the fuel is exposed to this temperature
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde Filterverstopfungen und Ablagerungen in einem Commonrail-System zu reduzieren.Of the The present invention is therefore based on the object filter blockages and reduce deposits in a Commonrail system.
Diese Aufgabe wird durch die im Patentanspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in weiteren Ansprüchen angegeben.These The object is achieved by the features specified in claim 1 solved. Advantageous embodiments of the invention are specified in further claims.
Das Kraftstoffeinspritz-System, insbesondere ein Commonrail-System umfasst einen Kraftstofftank, eine Hochdruckpumpe, eine Zuleitung vom Kraftstofftank zu der Hochdruckpumpe, über welche Kraftstoff von dem Kraftstofftank zu der Hochdruckpumpe zuleitbar ist. Die Hochdruckpumpe baut in einem Druckspeicher mittels dem Kraftstoff einen Druck von 100 bis 2000 bar auf. Mindestens ein Injektor ist an den Druckspeicher angeschlossen. Über eine an den Injektor angeschlossene Injektorrücklaufleitung, kann überschüssiger Kraftstoff, welcher nicht in den Motor eingespritzt werden soll, wie z.B. Leckage, zu dem Kraftstofftank zurückgeführt werden. Über eine Pumpenrücklaufleitung, welche die Hochdruckpumpe mit der Injektorrücklaufleitung verbindet, kann überschüssiger Kraftstoff, welcher in die Hochdruckpumpe einfließt, über ein Druckkontrollventil zu dem Kraftstofftank zurückgeführt werden. Ein Kühlelement, kühlt den Kraftstoff, das in die Injektorrücklaufleitung eingebaut ist. Dadurch kann die Temperatur niedrig gehalten und somit eine Verstopfung des Kraftstofffilters, sowie die Bildung von Ablagerungen in der Hochdruckpumpe und in dem Injektor reduziert und/oder verhindert werden.The Fuel injection system, in particular a common rail system comprises a Fuel tank, a high-pressure pump, a supply line from the fuel tank to the high pressure pump, over which fuel feedable from the fuel tank to the high pressure pump is. The high-pressure pump builds in a pressure accumulator by means of Fuel a pressure of 100 to 2000 bar. At least one Injector is connected to the accumulator. Over a injector return line connected to the injector, excess fuel, which should not be injected into the engine, e.g. Leakage, be returned to the fuel tank. Over a Pump return line, which connects the high-pressure pump with the injector return line can excess fuel, which flows into the high-pressure pump, via a pressure control valve be returned to the fuel tank. One Cooling element, cools that Fuel entering the injector return line is installed. As a result, the temperature can be kept low and thus a blockage of the fuel filter, as well as the formation reduced by deposits in the high pressure pump and in the injector and / or prevented.
Meist ist der Kraftstoff, welcher durch die Leckage des Injektors fließt wärmer als der Kraftstoff, welcher durch die Pumpenrücklaufleitung fließt. Deshalb ist es vorteilhaft, das Kühlelement zwischen dem Injektor und der Einmündung der Pumpenrücklaufleitung in die Injektorrücklaufleitung anzuordnen. Die Kühlwirkung kann zusätzlich verbessert werden, indem ein weiteres Kühlelement zwischen der Einmündung der Pumpenrücklaufleitung in die Injektorrücklaufleitung und dem Kraftstofftank angeordnet ist.Most of time is the fuel that flows through the leakage of the injector warmer than the fuel that flows through the pump return line. Therefore it is advantageous to the cooling element between the injector and the mouth of the pump return line into the injector return line to arrange. The cooling effect can additionally be improved by adding another cooling element between the junction of the Pump return line into the injector return line and the fuel tank is arranged.
Alternativ dazu kann das Kühlelement jedoch auch, wie in Anspruch 4 beschrieben zwischen der Einmündung der Pumpenrücklaufleitung in die Injektorrücklaufleitung und dem Kraftstofftank angeordnet sein. Dies hat den Vorteil, dass der kühlere Kraftstoff des Pumpenrücklaufs den Kraftstoff, welcher die Leckage des Injektors durchfliesst durch Vermi schung kühlt. Der gemischte Kraftstoff wird anschließend, beim Durchlauf durch das Kühlelement gekühlt.alternative to do this, the cooling element However, as described in claim 4 between the junction of the Pump return line into the injector return line and the fuel tank. This has the advantage that the cooler one Fuel of the pump return the fuel which flows through the leakage of the injector Vermi schung cools. The mixed fuel is then passed through the cooling element cooled.
Indem die Injektorrücklaufleitung und/oder die Pumpenrücklaufleitung aus Metall ausgeführt sind, kann der Kraftstoff zusätzlich gekühlt werden.By doing the injector return line and / or the pump return line made of metal, can the fuel in addition chilled become.
Bei einer Volume Controled Valve Closed Loop (VCV) Regelung, wird die Druckregelung nur über das Volumenstromventil vorgenommen. Dies hat den Vorteil, dass die Temperatur des Kraftstoffes in der Pumpenrücklaufleitung deutlich geringer ist, als bei der Druckregelung über ein Druckregelventil.at a Volume Controled Valve Closed Loop (VCV) scheme, the Pressure control only via made the flow valve. This has the advantage that the Temperature of the fuel in the pump return line significantly lower is, as in the pressure control over a pressure control valve.
Durch einen Injektor mit stark reduzierter Leckage oder durch einen leckagefreien Injektor wird ebenfalls der Energieverlust im Commonrail-System gemindert und somit die Erwärmung des Kraftstoffes reduziert.By an injector with greatly reduced leakage or by a leak-free Injector is also reduced energy loss in Commonrail system and thus the warming reduced the fuel.
Indem das Kühlelement derart dimensioniert ist, dass die Kraftstofftemperatur am Kühlerausgang 40°C nicht übersteigen kann, kann besonders zuverlässig gewährleistet werden, dass die Kraftstofffilter nicht zu schnell verstopfen und sich nur wenig Ablagerungen bilden.By doing the cooling element is dimensioned such that the fuel temperature at the radiator outlet does not exceed 40 ° C can, can be particularly reliable guaranteed be that the fuel filter does not clog too fast and form very little deposits.
Die Erfindung wird nachfolgend anhand der Zeichnung beispielsweise näher erläutert. Dabei zeigen:The The invention will be explained in more detail with reference to the drawing, for example. there demonstrate:
In weiteren Varianten der ersten und zweiten Ausführungsform, kann das Kühlelement mittels des Kühlwassers des Verbrennungsmotors, mittels eines Kühlöls, mittels des Diesels im Kraftstofftank oder mittels einer Klimaanlage gekühlt werden.In Further variants of the first and second embodiments, the cooling element by means of cooling water of the internal combustion engine, by means of a cooling oil, by means of the diesel engine in Fuel tank or cooled by an air conditioner.
Die Kühlwirkung wird auch deutlich verbessert, wenn die rückführenden Leitungen aus gut wärmeleitfähigem Material bestehen. Anstatt des heute üblichen Kunststoffes ist die Verwendung von geeigneten Stählen sinnvoll.The cooling effect is also significantly improved when the returning lines of good thermal conductivity material consist. Instead of the usual today Plastic, the use of suitable steels makes sense.
Durch eine gezielte Anpassung der Leitungsdurchmesser der Injektorrücklaufleitung können Temperatur und die Dauer, während welcher der Kraftstoff heiß ist, niedrig gehalten werden. Ein großer Durchmesser erhöht die wärmeabstrahlende Oberfläche, ein kleiner Durchmesser erhöht die Fliessgeschwindigkeit. Ein Optimum kann mittels Simulation motorspezifisch gefunden werden.By a targeted adjustment of the pipe diameter of the injector return line can temperature and the duration while which fuel is hot, kept low. A large diameter increases the heat radiating surface, a small diameter increased the flow speed. An optimum can be engine-specific by means of simulation being found.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006006557A DE102006006557A1 (en) | 2006-02-13 | 2006-02-13 | Fuel injection system e.g. common rail system, has fuel tank, high-pressure pump and cooling component, which cools fuel integrated into injector return pipe between injector and inlet of pump return pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006006557A DE102006006557A1 (en) | 2006-02-13 | 2006-02-13 | Fuel injection system e.g. common rail system, has fuel tank, high-pressure pump and cooling component, which cools fuel integrated into injector return pipe between injector and inlet of pump return pipe |
Publications (1)
Publication Number | Publication Date |
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DE102006006557A1 true DE102006006557A1 (en) | 2007-08-23 |
Family
ID=38288652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102006006557A Ceased DE102006006557A1 (en) | 2006-02-13 | 2006-02-13 | Fuel injection system e.g. common rail system, has fuel tank, high-pressure pump and cooling component, which cools fuel integrated into injector return pipe between injector and inlet of pump return pipe |
Country Status (1)
Country | Link |
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DE (1) | DE102006006557A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009118209A1 (en) * | 2008-03-25 | 2009-10-01 | Robert Bosch Gmbh | Power-generating machine and method for extending the storage life of fuel |
DE102009033381A1 (en) * | 2009-07-16 | 2011-01-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Fuel tank with a cooling device # |
US20110023832A1 (en) * | 2009-07-30 | 2011-02-03 | Ford Global Technologies, Llc | Fuel system for an internal combustion engine |
US20120118268A1 (en) * | 2009-07-27 | 2012-05-17 | Robert Bosch Gmbh | High pressure injection system having fuel cooling from low pressure region |
CN102734017A (en) * | 2012-06-27 | 2012-10-17 | 无锡开普动力有限公司 | Electronic control high-pressure common-rail fuel injection system for V-shaped diesel engine |
EP2587044A1 (en) * | 2011-10-26 | 2013-05-01 | Peugeot Citroën Automobiles Sa | Fuel injection system into the combustion chamber of an internal combustion engine |
DE102015209560A1 (en) * | 2015-05-26 | 2016-12-01 | Continental Automotive Gmbh | Fuel injector |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19937673A1 (en) * | 1999-08-10 | 2001-02-22 | Siemens Ag | Injection system for an internal combustion engine |
US6868838B2 (en) * | 2001-10-22 | 2005-03-22 | Peugeot Citroen Automobiles S.A. | Fuel injection system for a diesel engine with recycling |
-
2006
- 2006-02-13 DE DE102006006557A patent/DE102006006557A1/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19937673A1 (en) * | 1999-08-10 | 2001-02-22 | Siemens Ag | Injection system for an internal combustion engine |
US6868838B2 (en) * | 2001-10-22 | 2005-03-22 | Peugeot Citroen Automobiles S.A. | Fuel injection system for a diesel engine with recycling |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009118209A1 (en) * | 2008-03-25 | 2009-10-01 | Robert Bosch Gmbh | Power-generating machine and method for extending the storage life of fuel |
DE102009033381A1 (en) * | 2009-07-16 | 2011-01-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Fuel tank with a cooling device # |
US20120118268A1 (en) * | 2009-07-27 | 2012-05-17 | Robert Bosch Gmbh | High pressure injection system having fuel cooling from low pressure region |
US20110023832A1 (en) * | 2009-07-30 | 2011-02-03 | Ford Global Technologies, Llc | Fuel system for an internal combustion engine |
US8251046B2 (en) * | 2009-07-30 | 2012-08-28 | Ford Global Technologies, Llc | Fuel system for an internal combustion engine |
EP2587044A1 (en) * | 2011-10-26 | 2013-05-01 | Peugeot Citroën Automobiles Sa | Fuel injection system into the combustion chamber of an internal combustion engine |
FR2981990A1 (en) * | 2011-10-26 | 2013-05-03 | Peugeot Citroen Automobiles Sa | FUEL INJECTION SYSTEM WITHIN A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE |
CN102734017A (en) * | 2012-06-27 | 2012-10-17 | 无锡开普动力有限公司 | Electronic control high-pressure common-rail fuel injection system for V-shaped diesel engine |
WO2014000413A1 (en) * | 2012-06-27 | 2014-01-03 | 无锡开普动力有限公司 | Electrically-controlled high pressure common rail fuel injection system for use in v-type diesel engine |
DE102015209560A1 (en) * | 2015-05-26 | 2016-12-01 | Continental Automotive Gmbh | Fuel injector |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
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R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |