DE102013203891A1 - High-pressure pump, in particular high-pressure fuel pump for an internal combustion engine - Google Patents
High-pressure pump, in particular high-pressure fuel pump for an internal combustion engine Download PDFInfo
- Publication number
- DE102013203891A1 DE102013203891A1 DE201310203891 DE102013203891A DE102013203891A1 DE 102013203891 A1 DE102013203891 A1 DE 102013203891A1 DE 201310203891 DE201310203891 DE 201310203891 DE 102013203891 A DE102013203891 A DE 102013203891A DE 102013203891 A1 DE102013203891 A1 DE 102013203891A1
- Authority
- DE
- Germany
- Prior art keywords
- pump
- pressure
- tappet
- channel
- cylinder
- 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
- 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
- F02M59/10—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 characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
- F02M59/442—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 preventing fuel leakage around pump plunger, e.g. fluid barriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0448—Sealing means, e.g. for shafts or housings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Die Erfindung betrifft eine Hochdruckpumpe 1, insbesondere Kraftstoffhochdruckpumpe einer Brennkraftmaschine, mit einem einen Rollenstößel 4 der Hochdruckpumpe 1 aufnehmenden Gehäuse und mit einem, mit dem Rollenstößel 4 zusammenwirkenden und in einem Pumpenzylinder 2 geführten Pumpenstößel 3, der mit einer Stößelfeder 8 zusammenwirkt, wobei zwischen dem Pumpenzylinder 2 und dem Pumpenstößel 3 ein rollenstößelseitig von einer Dichtung 11 abgeschlossener hydraulischer Raum 10 angeordnet ist, und wobei der Raum 10 über einen Kanal 13 mit einem Rücklauf in einem Niederdruckkreis verbunden ist. Erfindungsgemäß wird die Funktion einer Hochdruckpumpe 1 verbessert. Erreicht wir dies dadurch, dass der hydraulische Raum 10 als eine absatzfreie, zylinderförmige Ausnehmung in dem Pumpenzylinder 2 ausgebildet ist und dass der Kanal 10 in die pumpenzylinderseitige Stirnwand 21 der Ausnehmung einmündet.The invention relates to a high-pressure pump 1, in particular a high-pressure fuel pump of an internal combustion engine, with a housing receiving a roller tappet 4 of the high-pressure pump 1 and with a pump tappet 3 which interacts with the roller tappet 4 and is guided in a pump cylinder 2 and which interacts with a tappet spring 8, with between the Pump cylinder 2 and the pump tappet 3, a hydraulic space 10 closed off by a seal 11 on the roller tappet side is arranged, and the space 10 is connected via a channel 13 to a return in a low-pressure circuit. According to the invention, the function of a high pressure pump 1 is improved. We achieve this in that the hydraulic space 10 is designed as a step-free, cylindrical recess in the pump cylinder 2 and that the channel 10 opens into the pump cylinder-side end wall 21 of the recess.
Description
Die vorliegende Erfindung betrifft eine Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe einer Brennkraftmaschine, mit einem einen Rollenstößel der Hochdruckpumpe aufnehmenden Gehäuse und mit einem mit dem Rollenstößel zusammenwirkenden und in einem Pumpenzylinder geführten Pumpenstößel, der mit einer Stößelfeder zusammenwirkt, wobei zwischen dem Pumpenzylinder und dem Pumpenstößel ein rollenstößelseitig von einer Dichtung abgeschlossener hydraulischer Raum angeordnet ist, und wobei der Raum über einen Kanal mit einem Rücklauf in einen Niederdruckkreis verbunden ist. The present invention relates to a high-pressure pump, in particular high-pressure fuel pump of an internal combustion engine, with a roller tappet of the high pressure pump receiving housing and a cooperating with the roller tappet and guided in a pump cylinder pump plunger, which cooperates with a plunger spring, wherein between the pump cylinder and the pump plunger a roller plunger side of a seal closed hydraulic space is arranged, and wherein the space is connected via a channel with a return to a low-pressure circuit.
Stand der Technik State of the art
Eine solche Hochdruckpumpe ist aus der
Der Erfindung liegt die Aufgabe zugrunde, die Funktion einer Hochdruckpumpe zu verbessern. The invention has for its object to improve the function of a high pressure pump.
Offenbarung der ErfindungDisclosure of the invention
Vorteile der ErfindungAdvantages of the invention
Die Aufgabe wird dadurch gelöst, dass der hydraulische Raum als eine absatzfreie, zylinderförmige Ausnehmung in dem Pumpenzylinder ausgebildet ist und dass der Kanal in die pumpenzylinderseitige Stirnwand der Ausnehmung einmündet. Durch diese Ausgestaltung ist einerseits die Herstellbarkeit des hydraulischen Raums mit dem in den hydraulischen Raum mündenden Kanal verbessert, da keine Absätze wie beim Stand der Technik in den Raum einzuarbeiten sind. Dadurch, dass der Kanal in die Stirnwand der Ausnehmung einmündet, kann dieser beispielsweise als Bohrung einfach gefertigt werden. Zudem wird kein zusätzlicher Fluidraum, wie dies beim Stand der Technik erforderlich ist, benötigt, was zu einem unverändert kompakten Aufbau der Hochdruckpumpe beiträgt. Das aus einem Pumpenarbeitsraum über die Pumpenstößelführung in dem Pumpenzylinder in den hydraulischen Raum gelangende Leckagefluid wird bei der erfindungsgemäßen Ausgestaltung direkt in den seitlich zu der Pumpenstößelführung in dem Pumpenzylinder angeordneten Kanal abgeführt. Dadurch wird der hydraulische Raum im Bereich oberhalb der Dichtung druckfrei gehalten, wodurch auch die Belastung der Dichtung, die beispielsweise mit Dichtlippen ausgebildet ist, zumindest deutlich reduziert ist. Bei einer Ausführung ohne den Kanal würde die entsprechende innere Dichtlippe durch den auftretenden Druck an den Pumpenstößel angepresst werden und somit die Dichtlippe an dieser Stelle verstärkt verschleißen. Zusätzlich kommen als Belastung zum nominalen Zulaufdruck noch Druckspitzen hinzu, die durch die Hochdruckpumpe oder andere Niederdruckkomponenten verursacht werden. Wie beim Stand der Technik wird durch den Kanal die heiße Leckagemenge abgeführt und somit das gesamte Temperaturniveau der Hochdruckpumpe abgesenkt. Die Hochdruckpumpe kann eine beliebige Hochdruckpumpe eines hydraulischen Systems sein, ist aber bevorzugt eine Kraftstoffhochdruckpumpe, die insbesondere als Steckpumpe ausgebildet ist. Eine solche Kraftstoffhochdruckpumpe wird beispielsweise bei einem Common-Rail-Einspritzsystem verwendet. Von der Kraftstoffhochdruckpumpe wird ein Fluid in Form von Dieselkraftstoff in einen Hochdruckspeicher gefördert.The object is achieved in that the hydraulic space is formed as a paragraph-free, cylindrical recess in the pump cylinder and that the channel opens into the pump cylinder side end wall of the recess. This refinement on the one hand improves the manufacturability of the hydraulic space with the channel opening into the hydraulic space, since no shoulders are to be worked into the room as in the prior art. The fact that the channel opens into the end wall of the recess, this can be easily made, for example, as a hole. In addition, no additional fluid space, as required in the prior art, required, which contributes to an unchanged compact design of the high-pressure pump. The leaking fluid from a pump working space via the pump tappet guide in the pump cylinder into the hydraulic space is discharged in the embodiment according to the invention directly into the channel arranged laterally to the pump tappet guide in the pump cylinder. As a result, the hydraulic space in the region above the seal is kept free of pressure, whereby the load on the seal, which is formed for example with sealing lips, at least significantly reduced. In one embodiment without the channel, the corresponding inner sealing lip would be pressed by the pressure occurring on the pump plunger and thus wear the sealing lip reinforced at this point. In addition, pressure peaks caused by the high-pressure pump or other low-pressure components are added as a load to the nominal inlet pressure. As in the prior art, the hot leakage amount is discharged through the channel and thus lowered the entire temperature level of the high-pressure pump. The high-pressure pump may be any high-pressure pump of a hydraulic system, but is preferably a high-pressure fuel pump, which is designed in particular as a plug-in pump. Such a high-pressure fuel pump is used for example in a common rail injection system. From the high-pressure fuel pump, a fluid is conveyed in the form of diesel fuel in a high-pressure accumulator.
In Weiterbildung der Erfindung ist der Kanal in den Pumpenzylinder eingelassen. Dabei ist in weiterer Ausgestaltung an dem Pumpenzylinder ein mit dem Rücklauf verbindbarer Anschlussflansch angeordnet, der mit dem Kanal zusammenwirkt. Diese Ausgestaltung ist einfach zu fertigen und stellt sicher, dass keine kostenintensiven zusätzlichen Komponenten benötigt werden.In a further development of the invention, the channel is embedded in the pump cylinder. In this case, in a further embodiment, a connecting flange, which can be connected to the return, is arranged on the pump cylinder, which interacts with the channel. This design is easy to manufacture and ensures that no costly additional components are needed.
In Weiterbildung der Erfindung ist der Anschlussflansch unterhalb eines Zulaufanschlussflansches in Höhe eines Pumpenarbeitsraums des Pumpenstößels angeordnet. Diese Ausgestaltung trägt ebenfalls zu einem kompakten Aufbau der so ausgebildeten Hochdruckpumpe bei, wobei durch die Anordnung des Anschlussflansches unterhalb des Zulaufanschlussflansches die entsprechenden weiterführenden Leitungen platzsparend angeordnet werden können. In a further development of the invention, the connecting flange is arranged below a Zulaufanschlussflansches in the amount of a pump working space of the pump plunger. This embodiment also contributes to a compact construction of the high-pressure pump thus formed, wherein the arrangement of the connection flange below the Zulaufanschlussflansches the corresponding secondary lines can be arranged to save space.
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung des bevorzugten Ausführungsbeispiels der Erfindung anhand einer Figur näher dargestellt. Further, measures improving the invention will be described in more detail below together with the description of the preferred embodiment of the invention with reference to a figure.
Kurze Beschreibung der Zeichnung Short description of the drawing
Es zeigt: It shows:
Ausführungsform der ErfindungEmbodiment of the invention
Die Hochdruckpumpe
In eine Stirnwand
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 202006021087 U1 [0002] DE 202006021087 U1 [0002]
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310203891 DE102013203891A1 (en) | 2013-03-07 | 2013-03-07 | High-pressure pump, in particular high-pressure fuel pump for an internal combustion engine |
PCT/EP2014/051506 WO2014135304A1 (en) | 2013-03-07 | 2014-01-27 | High-pressure pump, in particular high-pressure fuel pump for an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310203891 DE102013203891A1 (en) | 2013-03-07 | 2013-03-07 | High-pressure pump, in particular high-pressure fuel pump for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102013203891A1 true DE102013203891A1 (en) | 2014-09-11 |
Family
ID=50002754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201310203891 Withdrawn DE102013203891A1 (en) | 2013-03-07 | 2013-03-07 | High-pressure pump, in particular high-pressure fuel pump for an internal combustion engine |
Country Status (2)
Country | Link |
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DE (1) | DE102013203891A1 (en) |
WO (1) | WO2014135304A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700065540A1 (en) * | 2017-06-13 | 2018-12-13 | Bosch Gmbh Robert | PUMP UNIT FOR FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006021087U1 (en) | 2005-11-13 | 2012-06-11 | Vialle Alternative Fuel Systems B.V. | Fuel cooling system for internal combustion engines |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4215000B2 (en) * | 2005-01-19 | 2009-01-28 | 株式会社デンソー | High pressure pump |
JP4825842B2 (en) * | 2008-06-09 | 2011-11-30 | トヨタ自動車株式会社 | Fuel pump |
US9151289B2 (en) * | 2008-08-21 | 2015-10-06 | Cummins Inc. | Fuel pump |
-
2013
- 2013-03-07 DE DE201310203891 patent/DE102013203891A1/en not_active Withdrawn
-
2014
- 2014-01-27 WO PCT/EP2014/051506 patent/WO2014135304A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006021087U1 (en) | 2005-11-13 | 2012-06-11 | Vialle Alternative Fuel Systems B.V. | Fuel cooling system for internal combustion engines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700065540A1 (en) * | 2017-06-13 | 2018-12-13 | Bosch Gmbh Robert | PUMP UNIT FOR FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE |
WO2018228970A1 (en) * | 2017-06-13 | 2018-12-20 | Robert Bosch Gmbh | Pump unit for feeding fuel to an internal combustion engine |
CN110770432A (en) * | 2017-06-13 | 2020-02-07 | 罗伯特·博世有限公司 | Pump unit for supplying fuel to an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
WO2014135304A1 (en) | 2014-09-12 |
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Legal Events
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |