DE102007056891A1 - Fuel high-pressure pump for fuel system of internal-combustion engine, has check valve opening to high pressure regions, where opening pressure difference of check valve is smaller than opening pressure difference of exhaust valve - Google Patents
Fuel high-pressure pump for fuel system of internal-combustion engine, has check valve opening to high pressure regions, where opening pressure difference of check valve is smaller than opening pressure difference of exhaust valve Download PDFInfo
- Publication number
- DE102007056891A1 DE102007056891A1 DE200710056891 DE102007056891A DE102007056891A1 DE 102007056891 A1 DE102007056891 A1 DE 102007056891A1 DE 200710056891 DE200710056891 DE 200710056891 DE 102007056891 A DE102007056891 A DE 102007056891A DE 102007056891 A1 DE102007056891 A1 DE 102007056891A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- check valve
- high pressure
- fuel
- valve element
- 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.)
- Withdrawn
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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/447—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/462—Delivery valves
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Check Valves (AREA)
Abstract
Description
Stand der TechnikState of the art
Die Erfindung betrifft eine Kraftstoff-Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The The invention relates to a high pressure fuel pump for a Fuel system of an internal combustion engine according to the preamble of Claim 1.
Die
Offenbarung der ErfindungDisclosure of the invention
Aufgabe der vorliegenden Erfindung ist es, eine Kraftstoff-Hochdruckpumpe zu schaffen, die zu guten Starteigenschaften der zugeordneten Brennkraftmaschine führt und gleichzeitig konstruktiv einfach aufgebaut ist.task It is the object of the present invention to provide a high pressure fuel pump to create the good starting characteristics of the associated internal combustion engine leads and at the same time structurally simple.
Diese Aufgabe wird durch eine Kraftstoff-Hochdruckpumpe mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in Unteransprüchen angegeben. Für die Erfindung wichtige Merkmale finden sich darüber hinaus in der nachfolgenden Beschreibung und in der Zeichnung, wobei die Merkmale sowohl in Alleinstellung als auch in unterschiedlichen Kombinationen für die Erfindung wichtig sein können, ohne dass hierauf explizit hingewiesen wird.These Task is by a high-pressure fuel pump with the features of claim 1. Advantageous developments of Invention are specified in subclaims. For the invention important features are beyond in the following description and in the drawing, wherein the Features both alone and in different Combinations may be important to the invention without being explicitly pointed out.
Die erfindungsgemäße Kraftstoff-Hochdruckpumpe hat den Vorteil, dass dann, wenn nach einem Betrieb der Brennkraftmaschine während einer Abkühlphase im Hochdruckbereich ein niedriger Druck auftritt, das Rückschlagventil öffnet und einen Druckausgleich zwischen dem Hochdruckbereich und dem Niederdruckbereich gestattet. Hierdurch wird ein Ausgasen im Hochdruckbereich verringert oder sogar gänzlich vermieden, was wiederum einen nachfolgenden Start der Brennkraftmaschine vereinfacht beziehungsweise beschleunigt. Durch die Integration des Rückschlagventils in das Auslassventil sind an bisherigen Kraftstoff-Hochdruckpumpen nur geringe oder sogar überhaupt keine konstruktiven Änderungen erforderlich. Insbesondere kann auf zusätzliche Bohrungen oder Leitungen in der Kraftstoff-Hochdruckpumpe verzichtet werden.The inventive high-pressure fuel pump has the advantage that when, after operation of the internal combustion engine during a cooling phase in the high pressure area a low pressure occurs, the check valve opens and a pressure equalization between the high pressure region and the low pressure region allowed. As a result, outgassing in the high pressure area is reduced or even completely avoided, which in turn is a subsequent one Start the internal combustion engine simplified or accelerated. By integrating the check valve in the exhaust valve are on previous high-pressure fuel pumps little or even at all no design changes required. Especially may be on additional holes or lines in the fuel high pressure pump be waived.
Der erfindungsgemäßen Kraftstoff-Hochdruckpumpe liegt die Erkenntnis zugrunde, dass auch das Kraftstoffsystem, einschließlich Hochdruckbereich und Kraftstoff-Hochdruckpumpe, nach einem Betrieb der Brennkraftmaschine abkühlt. Durch die temperaturbedingte Volumenänderung des im Hochdruckbereich eingeschlossenen Kraftstoffes relativ zu jener der strukturellen Komponenten kann der an sich im Hochdruckbereich herrschende hohe Druck sehr schnell auf ein geringes Niveau abfallen bis hin zu einem Unterdruck. Durch einen solchen Unterdruck kann es zu einem Ausgasen von Kraftstoff kommen, was zu einer Verzögerung bei einem nachfolgenden Start der Brennkraftmaschine führt, da das ausgegaste Volumen zunächst komprimiert und mit flüssigem Kraftstoff gefüllt werden muss. All dies kann bei der erfindungsgemäßen Kraftstoff-Hochdruckpumpe vermieden werden, wobei die eigentliche Konstruktion der Kraftstoff-Hochdruckpumpe unverändert bleiben kann.Of the Fuel high-pressure pump according to the invention is Understanding that also the fuel system, including High pressure area and high pressure fuel pump after one operation the internal combustion engine cools. Due to the temperature Volume change of the enclosed in the high pressure area Fuel relative to that of the structural components the high pressure prevailing in the high pressure area very quickly fall to a low level up to a negative pressure. By such a negative pressure can lead to outgassing of fuel, which causes a delay in a subsequent start the internal combustion engine leads, as the outgassed volume initially compressed and with liquid fuel has to be filled. All of this can be with the invention Fuel high-pressure pump to be avoided, the actual Construction of the high-pressure fuel pump unchanged can stay.
Eine erste vorteilhafte Weiterbildung der erfindungsgemäßen Kraftstoff-Hochdruckpumpe zeichnet sich dadurch aus, dass das Rückschlagventil in ein Ventilelement des Auslassventils integriert ist. Damit kann sogar die Grundkonstruktion des Auslassventiles unverändert bleiben, was den konstruktiven Aufwand nochmals reduziert. Dabei hat sich herausgestellt, dass die Dynamik des Auslassventils bei einer kleinen und nur ein geringes Gewicht aufweisenden Ausführung des Rückschlagventils praktisch nicht beeinflusst wird.A first advantageous development of the invention High-pressure fuel pump is characterized in that the check valve is integrated in a valve element of the exhaust valve. So that can even the basic construction of the exhaust valve unchanged stay, which further reduces the design effort. there It has been found that the dynamics of the exhaust valve at a small and light weight version of the check valve is practically not affected.
In Weiterbildung hierzu wird vorgeschlagen, dass das Ventilelement des Auslassventils einen Ventilsitz für ein kugelförmiges Ventilelement des Rückschlagventils aufweist. Ein solches Rückschlagventil ist konstruktiv besonders einfach und arbeitet zuverlässig mit guter Abdichtung zwischen Hochdruckbereich und Niederdruckbereich.In Further development, it is proposed that the valve element the exhaust valve has a valve seat for a spherical Valve element of the check valve has. Such Check valve is structurally very simple and works reliably with good sealing between high-pressure area and low pressure area.
Dabei kann das kugelförmige Ventilelement des Rückschlagventils in einem am Ventilelement des Auslassventils gehaltenen Käfig angeordnet sein. Durch einen solchen Käfig, der vorzugsweise Querbohrungen zur Bereitstellung einer Strömungsdurchlässigkeit hat und der beispielsweise aus V2A-Stahl hergestellt sein kann, ist die Kugel verliersicher am Ventilelement des Auslassventils gehalten, wodurch die Betriebszuverlässigkeit des Auslassventils sichergestellt wird.there may be the spherical valve element of the check valve in a cage held on the valve member of the exhaust valve be arranged. By such a cage, preferably transverse bores to provide a flow permeability has and can be made of V2A steel, for example, the ball is held captive on the valve element of the exhaust valve, whereby Ensures the operational reliability of the exhaust valve becomes.
In nochmaliger Weiterbildung hierzu wird vorgeschlagen, dass das Ventilelement des Rückschlagventils durch den Käfig drallfrei geführt ist. Hierdurch werden Strömungsverluste beim Durchströmen des Rückschlagventils reduziert.In repeated training for this purpose, it is proposed that the valve element the check valve through the cage swirl-free is guided. As a result, flow losses reduced when flowing through the check valve.
Alternativ hierzu kann das kugelförmige Ventilelement des Rückschlagventils in einem Aufnahmeraum des Ventilelements des Auslassventils aufgenommen und in diesem durch einen Vorsprung gesichert sein. Ein solcher Vorsprung kann beispielsweise durch eine plastische Verformung eines Rands des Aufnahmeraums, beispielsweise durch Einbördeln, hergestellt werden. Eine solche Konstruktion baut platzsparend und verändert die Strömungsverhältnisse im Bereich des Auslassventils in besonders geringem Maße. Außerdem wird die Anzahl der handzuhabenden und zu montierenden Teile reduziert, was Kosten spart.alternative this can be the spherical valve element of the check valve received in a receiving space of the valve element of the exhaust valve and be secured in this by a projection. Such a Projection can for example by a plastic deformation of a Edge of the receiving space, for example by crimping, getting produced. Such a construction saves space and changes the flow conditions in the Range of the exhaust valve in a particularly small extent. In addition, the number of handles to be handled and mounted Parts reduced, which saves costs.
Besonders vorteilhaft ist es, wenn das Ventilelement des Rückschlagventils lediglich durch den in Sperrrichtung wirkenden hydraulischen Druck gegen den Ventilsitz beaufschlagt wird. Die für ein Öffnen des Rückschlagventils erforderliche Öffnungsdruckdifferenz ist in einem solchen Falle minimal, wodurch Ausgasen besonders effektiv unterbunden wird, da das Rückschlagventil beim Abkühlen des Hochdruckbereichs vergleichsweise früh öffnet.Especially It is advantageous if the valve element of the check valve only by the hydraulic pressure acting in the reverse direction is acted upon against the valve seat. The for opening the Check valve required opening pressure difference is minimal in such a case, whereby outgassing is particularly effective is prevented because the check valve during cooling the high-pressure area comparatively early opens.
Eine konstruktiv besonders einfache Variante sieht vor, dass das Ventilelement des Rückschlagventils ein biegsames Flachstück umfasst, welches am Ventilelement des Rückschlagventils befestigt ist und mit einem dort vorhandenen Flachsitz zusammenarbeitet. Das Flachstück kann beispielsweise am Ventilelement des Rückschlagventils festgeschweißt sein. Dabei kann das Flachstück ein Federblech umfassen, wodurch die Abdichtung des Rückschlagventils verbessert wird.A structurally particularly simple variant provides that the valve element the check valve is a flexible sheet comprising, which on the valve element of the check valve is fixed and cooperates with a flat seat existing there. The flat piece, for example, on the valve element of Welded check valve. It can the flat piece comprise a spring plate, whereby the seal the check valve is improved.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Nachfolgend werden Ausführungsformen der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung näher erläutert. In der Zeichnung zeigen:following Embodiments of the present invention are disclosed With reference to the accompanying drawings explained in more detail. In the drawing show:
Ausführungsformen der Erfindungembodiments the invention
Ein
Kraftstoffsystem einer Brennkraftmaschine trägt in
Die
Kraftstoff-Hochdruckpumpe
Wie
unter anderem auch aus
Im
Ventilelement
Im
normalen Betrieb arbeitet die Kraftstoff-Hochdruckpumpe
Die
Brennkraftmaschine erwärmt sich im normalen Betrieb ebenso
wie das Kraftstoffsystem
Sobald
der Druck in der Hochdruckleitung
Durch
die enge Führung des kugelförmigen Ventilelements
Nun
wird unter Bezugnahme auf
Bei
der Ausführungsform von
Eine
nochmals andere Ausführungsform eines Rückschlagventils
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES 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 The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 19539885 A1 [0002] - DE 19539885 A1 [0002]
Claims (9)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710056891 DE102007056891A1 (en) | 2007-11-26 | 2007-11-26 | Fuel high-pressure pump for fuel system of internal-combustion engine, has check valve opening to high pressure regions, where opening pressure difference of check valve is smaller than opening pressure difference of exhaust valve |
ITMI2008A002073A IT1391789B1 (en) | 2007-11-26 | 2008-11-21 | HIGH PRESSURE FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE FUEL SYSTEM |
FR0857941A FR2924174B1 (en) | 2007-11-26 | 2008-11-24 | HIGH PRESSURE FUEL PUMP FOR A FUEL SUPPLY SYSTEM OF AN INTERNAL COMBUSTION ENGINE |
CN 200810176370 CN101446247B (en) | 2007-11-26 | 2008-11-25 | Fuel high-pressure pump for fuel system of internal-combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710056891 DE102007056891A1 (en) | 2007-11-26 | 2007-11-26 | Fuel high-pressure pump for fuel system of internal-combustion engine, has check valve opening to high pressure regions, where opening pressure difference of check valve is smaller than opening pressure difference of exhaust valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007056891A1 true DE102007056891A1 (en) | 2009-05-28 |
Family
ID=40577085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200710056891 Withdrawn DE102007056891A1 (en) | 2007-11-26 | 2007-11-26 | Fuel high-pressure pump for fuel system of internal-combustion engine, has check valve opening to high pressure regions, where opening pressure difference of check valve is smaller than opening pressure difference of exhaust valve |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN101446247B (en) |
DE (1) | DE102007056891A1 (en) |
FR (1) | FR2924174B1 (en) |
IT (1) | IT1391789B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011002427A1 (en) | 2011-01-04 | 2012-07-05 | Robert Bosch Gmbh | Double check valve for e.g. preventing back-flow of reduction agent from storage tank of exhaust gas after treatment system of internal combustion engine of motor car, has disk-like elastic membrane provided with two slots |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114876688B (en) * | 2022-05-05 | 2022-11-18 | 浙江吉利控股集团有限公司 | Oil rail assembly and preheating method of oil rail body |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19539885A1 (en) | 1995-05-26 | 1996-11-28 | Bosch Gmbh Robert | Fuel supply system for IC engine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000045906A (en) * | 1998-07-29 | 2000-02-15 | Mitsubishi Electric Corp | High-pressure fuel pump system |
DE19834120A1 (en) * | 1998-07-29 | 2000-02-03 | Bosch Gmbh Robert | Fuel supply system of an internal combustion engine |
DE10332484A1 (en) * | 2003-07-17 | 2005-02-10 | Robert Bosch Gmbh | Fuel injection system for internal combustion engines |
DE102004037557A1 (en) * | 2004-08-03 | 2006-03-16 | Robert Bosch Gmbh | Fuel injection system |
-
2007
- 2007-11-26 DE DE200710056891 patent/DE102007056891A1/en not_active Withdrawn
-
2008
- 2008-11-21 IT ITMI2008A002073A patent/IT1391789B1/en active
- 2008-11-24 FR FR0857941A patent/FR2924174B1/en not_active Expired - Fee Related
- 2008-11-25 CN CN 200810176370 patent/CN101446247B/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19539885A1 (en) | 1995-05-26 | 1996-11-28 | Bosch Gmbh Robert | Fuel supply system for IC engine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011002427A1 (en) | 2011-01-04 | 2012-07-05 | Robert Bosch Gmbh | Double check valve for e.g. preventing back-flow of reduction agent from storage tank of exhaust gas after treatment system of internal combustion engine of motor car, has disk-like elastic membrane provided with two slots |
Also Published As
Publication number | Publication date |
---|---|
ITMI20082073A1 (en) | 2009-05-27 |
CN101446247B (en) | 2013-05-01 |
FR2924174B1 (en) | 2013-02-22 |
IT1391789B1 (en) | 2012-01-27 |
CN101446247A (en) | 2009-06-03 |
FR2924174A1 (en) | 2009-05-29 |
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Legal Events
Date | Code | Title | Description |
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R012 | Request for examination validly filed |
Effective date: 20140701 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |