WO2016015912A1 - High-pressure pump - Google Patents
High-pressure pump Download PDFInfo
- Publication number
- WO2016015912A1 WO2016015912A1 PCT/EP2015/063285 EP2015063285W WO2016015912A1 WO 2016015912 A1 WO2016015912 A1 WO 2016015912A1 EP 2015063285 W EP2015063285 W EP 2015063285W WO 2016015912 A1 WO2016015912 A1 WO 2016015912A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- pressure pump
- pump
- piston
- compression spring
- 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
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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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
- F02M59/368—Pump inlet valves being closed when actuated
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
- F02M2200/505—Adjusting spring tension by sliding spring seats
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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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
- F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
Definitions
- the invention relates to a high pressure pump, comprising a
- Pump work space is formed, which is connected via an adjustable by an electromagnet against the force of a compression spring inlet valve with a fluid supply and an outlet valve with a high-pressure outlet.
- Such a high-pressure pump is known from DE 10 2008 056 001 AI.
- This high-pressure pump is designed as a high-pressure fuel pump and has an electromagnetically actuated inlet valve.
- the inlet valve is adjustable against the force of a compression spring.
- the compression spring is supported on the inlet valve and a housing part of the high-pressure pump.
- the invention is based on the object, a high pressure pump
- This object is achieved in that the spring preload of the compression spring is adjustable.
- This embodiment is based first of all on the knowledge that an actuated by an electromagnet against the force of a compression spring inlet valve of a high-pressure pump in the de-energized state must be permanently open to an unwanted promotion of
- Determining the spring preload of the compression spring is the maximum occurring delivery case of volume at a maximum operating speed of the high-pressure pump. This operating state is but only achieved with a so-called switch and thus only briefly over the life of the high-pressure pump. In normal operation, however, the so determined spring force of the compression spring must be overcome at each stroke of the insert valve by the electromagnet. This results in the energization parameters for the electromagnet for its operation.
- the fact that the spring preload of the compression spring is adjustable, several advantages can be achieved.
- the inlet valve When setting the spring bias of the compression spring to a small value Wi, the inlet valve can be actuated by a small electromagnetic force, while the inlet valve can be actuated at a setting of the spring bias to a high value W 2 only by a high electromagnetic force.
- Electromagnet designed only to generate a low electromagnetic force, the inlet valve can not then be actuated and thus can not be promoted by the high-pressure pump medium to be conveyed in a high-pressure outlet.
- This function can be used according to the invention as a safety function of the high pressure pump, in the case of specifiable
- Spring preload of the compression spring to a low pressure value is adjustable, the entire magnetic circuit of the high-pressure pump, in particular so the
- Electromagnet are much smaller dimensions. As a result, it is also possible for the control unit or its output stage controlling the electromagnet to be much smaller and therefore more cost-effective
- the spring preload of the compression spring is mechanically, electrically and / or hydraulically adjustable.
- the compression spring between an armature of the electromagnet and a guided in a cylinder guide in the magnetic core piston is clamped.
- the piston is in the cylinder guide preferably adjustable according to a two-point control between two end positions.
- the spring tension of the compression spring can be set to the low value Wi and the high value W 2 .
- the piston in any combination
- Opening stroke of the intake valve to vary, for example, to set a very accurate flow control of the medium to be pumped by the high-pressure pump.
- the cylinder guide is formed opposite to the force acting on the piston compression spring as a hydraulic working space.
- a hydraulic fluid is introduced, which displaces the piston in the manner described above, thereby adjusting the spring bias of the compression spring.
- the hydraulic working space has a connection to a connecting line, which is connected to a high-pressure accumulator and or to the pump working space.
- the piston is a pressure booster piston.
- the piston can be actuated or adjusted even with low actuating forces.
- the piston acts on the opposite side of the compression spring with a mechanical or electrical actuator together.
- This embodiment is provided in particular as an alternative to the hydraulic adjustment of the piston, but may also be provided in addition to the hydraulic adjustment.
- the piston is sealing in the
- Hydraulic fluid come into contact and thus can be hindered in terms of their function.
- the spring preload is above a rotational speed of 5000 rev / min (revolutions per minute) of a high-pressure pump actuated drive shaft from a low value Wi to a high value W 2 adjustable.
- Spring preload has proved to be particularly advantageous, namely characterized in that only in exceptional situations or conceivable malfunction high speeds, for example, up to 6000 rev / min further promotion by the high-pressure pump is suppressed, while otherwise occurring normal speeds up to 5000 rev / min the
- Magnetic forces can be moved or adjusted.
- the high-pressure pump is a
- the article in any, any medium promotional, high pressure pump can be used, the preferred application is given in a high-pressure fuel pump, the fuel, for example, diesel fuel preferably in one
- High-pressure accumulator promotes, from which the stored there under a pressure of up to 3000 bar pressure of fuel injectors for injection into associated combustion chambers of an example designed as a self-igniting internal combustion engine engine is removed.
- FIGURE 1 shows a longitudinal section through a cylinder head of a high-pressure pump designed according to the invention.
- a designed as a high-pressure fuel pump high-pressure pump has a pump cylinder head 1, which is integrally formed with a pump cylinder.
- a pump working chamber 3 is arranged, which can be filled with fuel via an inlet valve 4, wherein the in the
- High-pressure fuel pump via a arranged in a high-pressure outlet 6 and schematically illustrated exhaust valve 5 in a continuing
- High-pressure line is promoted, for example, with a
- High-pressure accumulator is connected.
- the introduced fuel is stored under a pressure of up to 3000 bar.
- the high pressure accumulator is connected via injector lines with fuel injectors, by means of which fuel controlled in associated combustion chambers of a
- a cylinder bore 7 is inserted into the pump cylinder head 1 in extension of the pump working chamber 3, in which a pump piston 2 can be moved up and down by a drive shaft designed as a camshaft or eccentric shaft.
- the drive shaft is normally moved at a speed of up to 5000 rpm, but can be moved in special cases at a speed of up to 6000 rpm. This fact will be discussed in more detail below.
- an inlet space 8 is arranged, which via a
- Low pressure line is connected. About the low pressure line is the
- the inlet valve 4 is actuated by an electromagnet 10, wherein the inlet valve 4 in the non-energized state of the electromagnet 10, the
- Inlet duct 9 is fed back into the pump working space 3 in the absence of a pressure build-up required for delivery into the high-pressure outlet 6.
- the electromagnet 10 has a magnetic coil 12 arranged in a magnetic circuit conductor 11, which cooperates with a magnet armature 13.
- the armature 13 cooperates with the inlet valve 4 and is pressed by a compression spring 14 against the inlet valve 4, so that it is moved to the illustrated open position. Only at a current of the
- the armature 13 is moved upwardly against a magnetic core 26 and supported by a via a holding element 15 on the
- Inlet valve 4 acting shooting spring 16 the inlet valve 4 is moved upward so that a valve plate 17 of the intake valve 4 comes to rest on a recessed in the pump cylinder head 1 valve seat 18 and thus the
- Electromagnet 10 normally independent of the speed of the
- the compression spring 14 is supported on a piston 19 which in a in the pump cylinder head 1 in the axial direction to the pump working chamber 3 and the cylinder bore 7 in a
- Cylinder guide 20 of the magnetic core 26, which is arranged in a magnet housing 25, is guided. Opposite to acting on the piston 19 compression spring 14, the cylinder guide 20 is hydraulic
- High-pressure accumulator is connected.
- an adjusting element 24 is further arranged, which ensures a standard spring preload of the compression spring 14 up to a drive shaft speed of 5,000 revolutions. Up to this speed, the piston 19 is located on the adjusting element 24 on and the compression spring 14 is biased with a spring bias with a low value Wi.
- the electromagnet 10 and the electromagnet 10 actuated control unit together with an output stage are designed so that in this setting, the inlet valve 4 can be adjusted by the electromagnet 10 in the closed position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Beschreibung Titel Description title
Hochdruckpumpe high pressure pump
Die Erfindung betrifft eine Hochdruckpumpe, aufweisend einen einen The invention relates to a high pressure pump, comprising a
Pumpenzylinder beinhaltenden Pumpenzylinderkopf, in dem ein Pump cylinder containing pump cylinder head in which a
Pumpenarbeitsraum gebildet ist, der über ein von einem Elektromagneten gegen die Kraft einer Druckfeder verstellbares Einlassventil mit einer Fluidzuführung und über ein Auslassventil mit einem Hochdruckauslass verbunden ist. Pump work space is formed, which is connected via an adjustable by an electromagnet against the force of a compression spring inlet valve with a fluid supply and an outlet valve with a high-pressure outlet.
Stand der Technik State of the art
Eine derartige Hochdruckpumpe ist aus der DE 10 2008 056 001 AI bekannt. Diese Hochdruckpumpe ist als Kraftstoffhochdruckpumpe ausgebildet und weist ein elektromagnetisch betätigtes Einlassventil auf. Das Einlassventil ist gegen die Kraft einer Druckfeder verstellbar. Dabei stützt sich die Druckfeder an dem Einlassventil und einem Gehäuseteil der Hochdruckpumpe ab. Such a high-pressure pump is known from DE 10 2008 056 001 AI. This high-pressure pump is designed as a high-pressure fuel pump and has an electromagnetically actuated inlet valve. The inlet valve is adjustable against the force of a compression spring. In this case, the compression spring is supported on the inlet valve and a housing part of the high-pressure pump.
Der Erfindung liegt die Aufgabe zu Grunde, eine Hochdruckpumpe The invention is based on the object, a high pressure pump
bereitzustellen, die hinsichtlich ihrer Funktion verbessert ist. to provide improved in terms of their function.
Offenbarung der Erfindung Disclosure of the invention
Diese Aufgabe wird dadurch gelöst, dass die Federvorspannung der Druckfeder einstellbar ist. Dieser Ausgestaltung liegt zunächst einmal die Erkenntnis zu Grunde, dass ein von einem Elektromagneten gegen die Kraft einer Druckfeder betätigtes Einlassventil einer Hochdruckpumpe im unbestromten Zustand permanent geöffnet sein muss, um eine ungewünschte Förderung der This object is achieved in that the spring preload of the compression spring is adjustable. This embodiment is based first of all on the knowledge that an actuated by an electromagnet against the force of a compression spring inlet valve of a high-pressure pump in the de-energized state must be permanently open to an unwanted promotion of
Hochdruckpumpe zu verhindern. Bestimmend für die Federvorspannung der Druckfeder ist der maximal auftretende Förderfall von Volumen bei einer maximalen Betriebsdrehzahl der Hochdruckpumpe. Dieser Betriebszustand wird aber nur bei einem sogenannten Verschalter und somit nur kurzzeitig über der Lebensdauer der Hochdruckpumpe erreicht. Im Normalbetrieb muss dagegen die so bestimmte Federkraft der Druckfeder bei jedem Arbeitshub des Einsatzventils durch den Elektromagneten überwunden werden. Daraus ergeben sich die Bestromungsparameter für den Elektromagneten zu dessen Betrieb. Dadurch, dass die Federvorspannung der Druckfeder einstellbar ist, können mehrere Vorteile erreicht werden. Bei einer Einstellung der Federvorspannung der Druckfeder auf einen geringen Wert Wi kann das Einlassventil von einer geringen elektromagnetischen Kraft betätigt werden, während das Einlassventil bei einer Einstellung der Federvorspannung auf einen hohen Wert W2 nur von einer hohen elektromagnetischen Kraft betätigt werden kann. Ist der To prevent high-pressure pump. Determining the spring preload of the compression spring is the maximum occurring delivery case of volume at a maximum operating speed of the high-pressure pump. This operating state is but only achieved with a so-called switch and thus only briefly over the life of the high-pressure pump. In normal operation, however, the so determined spring force of the compression spring must be overcome at each stroke of the insert valve by the electromagnet. This results in the energization parameters for the electromagnet for its operation. The fact that the spring preload of the compression spring is adjustable, several advantages can be achieved. When setting the spring bias of the compression spring to a small value Wi, the inlet valve can be actuated by a small electromagnetic force, while the inlet valve can be actuated at a setting of the spring bias to a high value W 2 only by a high electromagnetic force. Is the
Elektromagnet nur zur Erzeugung einer geringen elektromagnetischen Kraft ausgelegt, kann das Einlassventil dann nicht betätigt werden und somit kann von der Hochdruckpumpe zu förderndes Medium nicht in einen Hochdruckauslass gefördert werden. Diese Funktion kann erfindungsgemäß als Sicherheitsfunktion der Hochdruckpumpe eingesetzt werden, bei der bei vorgebbaren Electromagnet designed only to generate a low electromagnetic force, the inlet valve can not then be actuated and thus can not be promoted by the high-pressure pump medium to be conveyed in a high-pressure outlet. This function can be used according to the invention as a safety function of the high pressure pump, in the case of specifiable
Betriebszuständen keine weitere Förderung des Mediums durch die Operating conditions no further promotion of the medium by the
Hochdruckpumpe erfolgt. Andererseits kann dadurch, dass die High pressure pump takes place. On the other hand, it is possible that the
Federvorspannung der Druckfeder auf einen niedrigen Druckwert einstellbar ist, der gesamte Magnetkreis der Hochdruckpumpe, insbesondere also der Spring preload of the compression spring to a low pressure value is adjustable, the entire magnetic circuit of the high-pressure pump, in particular so the
Elektromagnet wesentlich kleiner dimensioniert werden. Dadurch kann auch ein den Elektromagneten ansteuerndes Steuergerät beziehungsweise dessen Endstufe wesentlich kleiner und somit zu dem auch kostengünstiger Electromagnet are much smaller dimensions. As a result, it is also possible for the control unit or its output stage controlling the electromagnet to be much smaller and therefore more cost-effective
dimensioniert werden. Damit ist eine C02 Einsparung der so ausgebildeten Hochdruckpumpe über deren Lebensdauer erreicht, in dem eine permanente Energieersparnis bei einer Bestromung des Einlassventils durch die be dimensioned. Thus, a CO 2 saving of the thus formed high-pressure pump is achieved over its lifetime, in which a permanent energy savings in a current supply to the inlet valve by the
erfindungsgemäße Ausgestaltung ermöglicht ist. inventive design is possible.
In Weiterbildung der Erfindung ist die Federvorspannung der Druckfeder mechanisch, elektrisch und/oder hydraulisch einstellbar. Hier kann eine Auswahl der jeweiligen Einstellmöglichkeit oder aber auch eine Kombination der In a further development of the invention, the spring preload of the compression spring is mechanically, electrically and / or hydraulically adjustable. Here is a selection of the respective adjustment or even a combination of
Einstellmöglichkeiten nach vorgebbaren Randbedingungen erfolgen. Adjustments are made according to specifiable boundary conditions.
In weiterer Ausgestaltung der Erfindung ist die Druckfeder zwischen einem Anker des Elektromagneten und einem in einer Zylinderführung in dem Magnetkern geführten Kolben eingespannt. Der Kolben ist in der Zylinderführung vorzugsweise gemäß einer Zweipunkt- Regelung zwischen zwei Endlagen verstellbar. Dadurch kann die Federspannung der Druckfeder auf den niedrigen Wert Wi und den hohen Wert W2 eingestellt werden. Es ist aber bei einer entsprechenden Ansteuerung auch möglich, den Kolben in beliebigen In a further embodiment of the invention, the compression spring between an armature of the electromagnet and a guided in a cylinder guide in the magnetic core piston is clamped. The piston is in the cylinder guide preferably adjustable according to a two-point control between two end positions. Thereby, the spring tension of the compression spring can be set to the low value Wi and the high value W 2 . But it is also possible with a corresponding control, the piston in any
Zwischenpositionen zwischen den zuvor beschriebenen Endpositionen zu fixieren, um eine beliebige Änderung der Vorspannung der Druckfeder einzustellen. Diese Einstellung kann zur Erzielung bestimmter Effekte zweckdienlich sein. So ist es beispielsweise vorstellbar, dadurch den To fix intermediate positions between the previously described end positions to adjust any change in the bias of the compression spring. This setting may be useful for achieving certain effects. So it is conceivable, for example, thereby the
Öffnungshub des Einlassventils zu variieren, um beispielsweise eine sehr genaue Fördermengenregelung des von der Hochdruckpumpe zu fördernden Mediums einzustellen. Opening stroke of the intake valve to vary, for example, to set a very accurate flow control of the medium to be pumped by the high-pressure pump.
In Weiterbildung der Erfindung ist die Zylinderführung gegenüberliegend zu der an den Kolben angreifenden Druckfeder als hydraulischer Arbeitsraum ausgebildet. In diesen hydraulischen Arbeitsraum wird ein Hydraulikfluid eingeleitet, das den Kolben in der zuvor beschriebenen Art und Weise verstellt, um dadurch die Federvorspannung der Druckfeder einzustellen. In a further development of the invention, the cylinder guide is formed opposite to the force acting on the piston compression spring as a hydraulic working space. In this hydraulic working space, a hydraulic fluid is introduced, which displaces the piston in the manner described above, thereby adjusting the spring bias of the compression spring.
In Weiterbildung der Erfindung weist der hydraulische Arbeitsraum eine Anbindung zu einer Verbindungsleitung auf, die mit einem Hochdruckspeicher und oder dem Pumpenarbeitsraum verbunden ist. Dadurch ist sichergestellt, dass insbesondere bei einem hohen Druck in dem Hochdruckspeicher oder dem Pumpenarbeitsraum die Federvorspannung der Druckfeder soweit erhöht wird, dass das Einlassventil von dem Elektromagneten nicht mehr geschlossen werden kann, so dass keine weitere Förderung durch die Hochdruckpumpe erfolgt. In a further development of the invention, the hydraulic working space has a connection to a connecting line, which is connected to a high-pressure accumulator and or to the pump working space. This ensures that, in particular at a high pressure in the high-pressure accumulator or the pump working space, the spring preload of the compression spring is increased so far that the inlet valve of the electromagnet can not be closed, so that no further promotion by the high-pressure pump.
In Weiterbildung der Erfindung ist der Kolben ein Druckübersetzerkolben. In a further development of the invention, the piston is a pressure booster piston.
Dadurch ist erreicht, dass insbesondere auch mit geringen Betätigungskräften der Kolben betätigt beziehungsweise verstellt werden kann. It is thereby achieved that, in particular, the piston can be actuated or adjusted even with low actuating forces.
In Weiterbildung der Erfindung wirkt der Kolben auf der der Druckfeder gegenüberliegenden Seite mit einem mechanischen oder elektrischen Steller zusammen. Diese Ausgestaltung ist insbesondere als Alternative zu der hydraulischen Verstellung des Kolbens vorgesehen, kann aber auch additiv zu der hydraulischen Verstellung vorgesehen sein. In weiterer Ausgestaltung der Erfindung ist der Kolben dichtend in der In a further development of the invention, the piston acts on the opposite side of the compression spring with a mechanical or electrical actuator together. This embodiment is provided in particular as an alternative to the hydraulic adjustment of the piston, but may also be provided in addition to the hydraulic adjustment. In a further embodiment of the invention, the piston is sealing in the
Zylinderführung geführt. Diese Ausgestaltung stellt sicher, dass insbesondere bei einer Ausbildung des Arbeitsraums als hydraulischer Arbeitsraum der Cylinder guide out. This embodiment ensures that, in particular in a design of the working space as a hydraulic working space of the
Elektromagnet beziehungsweise dessen Komponenten nicht mit dem Electromagnet or its components not with the
Hydraulikfluid in Kontakt kommen und somit hinsichtlich ihrer Funktion behindert werden können. Hydraulic fluid come into contact and thus can be hindered in terms of their function.
In weiterer Ausgestaltung der Erfindung ist die Federvorspannung oberhalb einer Drehzahl von 5000 U/min (Umdrehungen pro Minute) einer die Hochdruckpumpe betätigenden Antriebswelle von einem niedrigen Wert Wi auf einen hohen Wert W2 verstellbar. Insbesondere diese drehzahlabhängige Einstellung der In a further embodiment of the invention, the spring preload is above a rotational speed of 5000 rev / min (revolutions per minute) of a high-pressure pump actuated drive shaft from a low value Wi to a high value W 2 adjustable. In particular, this speed-dependent setting of
Federvorspannung hat sich als besonders vorteilhaft erwiesen, indem nämlich dadurch bei nur in Ausnahmesituationen oder bei denkbaren Fehlfunktionen auftretenden hohen Drehzahlen beispielsweise von bis zu 6000 U/min eine weitere Förderung durch die Hochdruckpumpe unterbunden ist, während bei ansonsten auftretenden normalen Drehzahlen bis 5000 U/min die Spring preload has proved to be particularly advantageous, namely characterized in that only in exceptional situations or conceivable malfunction high speeds, for example, up to 6000 rev / min further promotion by the high-pressure pump is suppressed, while otherwise occurring normal speeds up to 5000 rev / min the
Federvorspannung herabgesetzt ist und das Einlassventil mit geringen Spring preload is reduced and the inlet valve with low
Magnetkräften bewegt beziehungsweise verstellt werden kann. Magnetic forces can be moved or adjusted.
In Weiterbildung der Erfindung ist die Hochdruckpumpe eine In a further development of the invention, the high-pressure pump is a
Kraftstoffhochdruckpumpe und ein von der Hochdruckpumpe gefördertes High-pressure fuel pump and a promoted by the high-pressure pump
Medium Kraftstoff. Wenn auch der Gegenstand bei einer beliebigen, ein beliebiges Medium fördernden, Hochdruckpumpe eingesetzt werden kann, ist die bevorzugte Anwendung bei einer Kraftstoffhochdruckpumpe gegeben, die Kraftstoff, beispielsweise Dieselkraftstoff vorzugsweise in einen Medium fuel. Although the article in any, any medium promotional, high pressure pump can be used, the preferred application is given in a high-pressure fuel pump, the fuel, for example, diesel fuel preferably in one
Hochdruckspeicher fördert, aus der der dort unter einem Druck von bis zu 3000 bar gespeicherte Druck von Kraftstoffinjektoren zur Einspritzung in zugeordnete Brennräume einer beispielsweise als selbstzündende Brennkraftmaschine ausgebildeten Brennkraftmaschine entnommen wird. High-pressure accumulator promotes, from which the stored there under a pressure of up to 3000 bar pressure of fuel injectors for injection into associated combustion chambers of an example designed as a self-igniting internal combustion engine engine is removed.
Weitere vorteilhafte Ausgestaltungen sind der Zeichnungsbeschreibung zu entnehmen, die ein in der Zeichnung beschriebenes Ausführungsbeispiel näher beschreiben. Die einzige Figur 1 zeigt einen Längsschnitt durch einen Zylinderkopf einer erfindungsgemäß ausgebildeten Hochdruckpumpe. Further advantageous embodiments are given in the drawing description, which describe an exemplary embodiment described in the drawing. The sole FIGURE 1 shows a longitudinal section through a cylinder head of a high-pressure pump designed according to the invention.
Eine als Kraftstoffhochdruckpumpe ausgebildete Hochdruckpumpe weist einen Pumpenzylinderkopf 1 auf, der einstückig mit einem Pumpenzylinder ausgebildet ist. In dem Pumpenzylinderkopf 1 ist ein Pumpenarbeitsraum 3 angeordnet, der über ein Einlassventil 4 mit Kraftstoff befüllbar ist, wobei der in den A designed as a high-pressure fuel pump high-pressure pump has a pump cylinder head 1, which is integrally formed with a pump cylinder. In the pump cylinder head 1, a pump working chamber 3 is arranged, which can be filled with fuel via an inlet valve 4, wherein the in the
Pumpenarbeitsraum 3 zugemessene Kraftstoff bei einem Förderhub der Pumpenarbeitsraum 3 metered fuel at a delivery stroke of
Kraftstoffhochdruckpumpe über ein in einem Hochdruckauslass 6 angeordnetes und schematisch dargestelltes Auslassventil 5 in eine weiterführende High-pressure fuel pump via a arranged in a high-pressure outlet 6 and schematically illustrated exhaust valve 5 in a continuing
Hochdruckleitung gefördert wird, die beispielsweise mit einem High-pressure line is promoted, for example, with a
Hochdruckspeicher verbunden ist. In dem Hochdruckspeicher wird der eingebrachte Kraftstoff unter einem Druck von bis zu 3000 bar gespeichert. Der Hochdruckspeicher ist über Injektorleitungen mit Kraftstoffinjektoren verbunden, mittels denen Kraftstoff gesteuert in zugeordnete Brennräume einer High-pressure accumulator is connected. In the high-pressure accumulator, the introduced fuel is stored under a pressure of up to 3000 bar. The high pressure accumulator is connected via injector lines with fuel injectors, by means of which fuel controlled in associated combustion chambers of a
Brennkraftmaschine eingespritzt werden kann. Zur Förderung des Kraftstoffs ist in Verlängerung des Pumpenarbeitsraums 3 eine Zylinderbohrung 7 in den Pumpenzylinderkopf 1 eingelassen, in der ein Pumpenkolben 2 von einer als Nockenwelle oder Exzenterwelle ausgebildeten Antriebswelle auf und ab bewegt werden kann. Die Antriebswelle wird normalerweise mit einer Drehzahl von bis zu 5000 U/min bewegt, kann aber in Sonderfällen mit einer Drehzahl von bis zu 6000 U/min bewegt werden. Auf diesen Umstand wird nachfolgend noch genauer eingegangen. Im Bereich des Einlassventils 4 ist ein Einlassraum 8 angeordnet, der über einen Internal combustion engine can be injected. To promote the fuel, a cylinder bore 7 is inserted into the pump cylinder head 1 in extension of the pump working chamber 3, in which a pump piston 2 can be moved up and down by a drive shaft designed as a camshaft or eccentric shaft. The drive shaft is normally moved at a speed of up to 5000 rpm, but can be moved in special cases at a speed of up to 6000 rpm. This fact will be discussed in more detail below. In the region of the inlet valve 4, an inlet space 8 is arranged, which via a
Einlasskanal 9 in dem Pumpenzylinderkopf 1 mit einer weiterführende Inlet duct 9 in the pump cylinder head 1 with a continuing
Niederdruckleitung verbunden ist. Über die Niederdruckleitung wird dem Low pressure line is connected. About the low pressure line is the
Einlassraum 8 und somit dem Einlassventil 4 Kraftstoff unter einem geringen Druck zugeführt, der bei geöffnetem Einlassventil 4 und einer Abwärtsbewegung des Pumpenkolbens 2 in den Pumpenarbeitsraum 3 eingeleitet wird. Inlet space 8 and thus the fuel to the intake valve 4 supplied under a low pressure, which is introduced with the intake valve 4 open and a downward movement of the pump piston 2 in the pump working chamber 3.
Das Einlassventil 4 wird von einem Elektromagneten 10 betätigt, wobei das Einlassventil 4 in nicht bestromten Zustand des Elektromagneten 10 die The inlet valve 4 is actuated by an electromagnet 10, wherein the inlet valve 4 in the non-energized state of the electromagnet 10, the
Strömungsverbindung von dem Einlassraum 8 zu dem Pumpenarbeitsraum 3 freigibt. In dieser Stellung wird zwar bei einer Abwärtsbewegung des Fluid communication from the inlet space 8 to the pump working space 3 releases. In this position, while a downward movement of
Pumpenkolbens 2 Kraftstoff in den Pumpenarbeitsraum 3 zugeführt, der aber bei einer nachfolgenden Aufwärtsbewegung des Pumpenkolbens 2 durch das geöffnete Einlassventil 4 wieder in den Einlassraum 8 und weiter in den Pump piston 2 fuel fed into the pump chamber 3, but at a subsequent upward movement of the pump piston 2 through the open inlet valve 4 back into the inlet chamber 8 and further into the
Einlasskanal 9 mangels eines für eine Förderung in den Hochdruckauslass 6 nötigen Druckaufbaus in den Pumpenarbeitsraum 3 zurückgefördert wird. Inlet duct 9 is fed back into the pump working space 3 in the absence of a pressure build-up required for delivery into the high-pressure outlet 6.
Der Elektromagnet 10 weist eine in einem Magnetkreisleiter 11 angeordnete Magnetspule 12 auf, die mit einem Magnetanker 13 zusammenwirkt. Der Magnetanker 13 wirkt mit dem Einlassventil 4 zusammen und wird von einer Druckfeder 14 gegen das Einlassventil 4 gedrückt, so dass dieses in die dargestellte geöffnete Stellung bewegt wird. Erst bei einer Bestromung derThe electromagnet 10 has a magnetic coil 12 arranged in a magnetic circuit conductor 11, which cooperates with a magnet armature 13. The armature 13 cooperates with the inlet valve 4 and is pressed by a compression spring 14 against the inlet valve 4, so that it is moved to the illustrated open position. Only at a current of the
Magnetspule 12 wird der Magnetanker 13 nach oben gegen einen Magnetkern 26 bewegt und unterstützt von einer über ein Halteelement 15 auf das Magnetic coil 12, the armature 13 is moved upwardly against a magnetic core 26 and supported by a via a holding element 15 on the
Einlassventil 4 einwirkenden Schießfeder 16 wird das Einlassventil 4 nach oben bewegt, so dass ein Ventilteller 17 des Einlassventils 4 zur Anlage auf einen in dem Pumpenzylinderkopf 1 eingelassenen Ventilsitz 18 kommt und somit derInlet valve 4 acting shooting spring 16, the inlet valve 4 is moved upward so that a valve plate 17 of the intake valve 4 comes to rest on a recessed in the pump cylinder head 1 valve seat 18 and thus the
Pumpenarbeitsraum 3 gegenüber dem Einlassraum 8 abgeschlossen ist. Folglich wird bei einer Aufwärtsbewegung des Pumpenkolbens Kraftstoff aus dem Pumpenarbeitsraum 3 über das Auslassventil 5 in den Hochdruckauslass 6 gefördert. Die Schließbewegung des Einlassventils 4 wird von dem Pump working space 3 opposite the inlet space 8 is completed. Consequently, with an upward movement of the pump piston, fuel is pumped from the pump working chamber 3 via the outlet valve 5 into the high-pressure outlet 6. The closing movement of the intake valve 4 is of the
Elektromagneten 10 normalerweise unabhängig von der Drehzahl der Electromagnet 10 normally independent of the speed of the
Antriebswelle der Hochdruckpumpe eingestellt, wenn eine vorbestimmte Drive shaft of the high pressure pump set when a predetermined
Kraftstoffmenge aus der Niederdruckleitung in dem Pumpenarbeitsraum 3 zugeführt worden ist. Gemäß der erfindungsgemäßen Ausgestaltung stützt sich die Druckfeder 14 an einem Kolben 19 ab, der in einer in dem Pumpenzylinderkopf 1 in Achsrichtung zu dem Pumpenarbeitsraum 3 und der Zylinderbohrung 7 in einer Amount of fuel from the low pressure line in the pump working space 3 has been supplied. According to the embodiment of the invention, the compression spring 14 is supported on a piston 19 which in a in the pump cylinder head 1 in the axial direction to the pump working chamber 3 and the cylinder bore 7 in a
Zylinderführung 20 des Magnetkerns 26, der in einem Magnetgehäuse 25 angeordnet ist, geführt ist. Gegenüberliegend zu der an dem Kolben 19 angreifenden Druckfeder 14 ist die Zylinderführung 20 als hydraulischer Cylinder guide 20 of the magnetic core 26, which is arranged in a magnet housing 25, is guided. Opposite to acting on the piston 19 compression spring 14, the cylinder guide 20 is hydraulic
Arbeitsraum 21 ausgebildet, der über eine Anbindung 22 und eine Working space 21 formed, which via a connection 22 and a
weiterführende Verbindungsleitung 23 beispielsweise mit dem continuing connection line 23, for example, with the
Hochdruckspeicher verbunden ist. In der Zylinderführung 20 ist weiterhin ein Einstellelement 24 angeordnet, das eine Standard- Federvorspannung der Druckfeder 14 bis zu einer Antriebswellendrehzahl von 5.000 Umdrehungen sicherstellt. Bis zu dieser Drehzahl liegt der Kolben 19 an dem Einstellelement 24 an und die Druckfeder 14 ist mit einer Federvorspannung mit einem niedrigen Wert Wi vorgespannt. Der Elektromagnet 10 und das den Elektromagneten 10 betätigende Steuergerät mitsamt einer Endstufe sind so ausgelegt, dass bei dieser Einstellung das Einlassventil 4 von dem Elektromagneten 10 in die geschlossene Stellung verstellt werden kann. Wird nun beispielsweise durch einen außergewöhnlichen Umstand die Drehzahl der Antriebswelle weiter beispielsweise bis zu einer Drehzahl von 6.000 Umdrehungen erhöht, erhöht sich der Förderdruck der Kraftstoffhochdruckpumpe, wobei diese (zunächst einmal geringfügige) Erhöhung des Drucks sofort über den Hochdruckspeicher in den hydraulischen Arbeitsraum 21 übertragen wird. Diese Druckerhöhung in dem hydraulischen Arbeitsraum 21 verstellt aber den Kolben 19, so dass die High-pressure accumulator is connected. In the cylinder guide 20, an adjusting element 24 is further arranged, which ensures a standard spring preload of the compression spring 14 up to a drive shaft speed of 5,000 revolutions. Up to this speed, the piston 19 is located on the adjusting element 24 on and the compression spring 14 is biased with a spring bias with a low value Wi. The electromagnet 10 and the electromagnet 10 actuated control unit together with an output stage are designed so that in this setting, the inlet valve 4 can be adjusted by the electromagnet 10 in the closed position. If, for example, by an extraordinary circumstance, the speed of the drive shaft further increased, for example up to a speed of 6,000 revolutions, the delivery pressure of the high-pressure fuel pump increases, this (initially slight) increase in pressure is transmitted immediately via the high-pressure accumulator into the hydraulic working chamber 21 , However, this pressure increase in the hydraulic working chamber 21 displaces the piston 19, so that the
Federvorspannung der Druckfeder 14 auf einen hohen Wert W2 in Richtung zu dem Magnetanker 13 verstellt wird. Bei dieser hohen Federvorspannung reicht die Magnetkraft des Elektromagneten 10 aber nicht mehr aus, den Magnetanker 13 zu verstellen und das Einlassventil 3 in die geschlossene Stellung zu bewegen beziehungsweise in der geschlossenen Stellung zu halten. Folglich erfolgt keine weitere Förderung von Kraftstoff über das Auslassventil 5 in den Hochdruckauslass 6. Dadurch ist sichergestellt, dass der Kraftstoffdruck in dem Hochdruckspeicher nicht weiter erhöht wird. Spring bias of the compression spring 14 is adjusted to a high value W 2 in the direction of the armature 13. At this high spring preload, however, the magnetic force of the electromagnet 10 is no longer sufficient to adjust the armature 13 and to move the inlet valve 3 into the closed position or to keep it in the closed position. Consequently, there is no further delivery of fuel via the exhaust valve 5 in the high-pressure outlet 6. This ensures that the fuel pressure in the high-pressure accumulator is not further increased.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014214811.1 | 2014-07-29 | ||
| DE102014214811.1A DE102014214811A1 (en) | 2014-07-29 | 2014-07-29 | high pressure pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016015912A1 true WO2016015912A1 (en) | 2016-02-04 |
Family
ID=53404545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2015/063285 Ceased WO2016015912A1 (en) | 2014-07-29 | 2015-06-15 | High-pressure pump |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102014214811A1 (en) |
| WO (1) | WO2016015912A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017118562A1 (en) * | 2016-01-05 | 2017-07-13 | Continental Automotive Gmbh | Switching valve for a fuel injection system, high-pressure fuel pump for a fuel injection system, and control method for controlling a switching valve in a high-pressure fuel pump |
| DE102016219483A1 (en) | 2016-10-07 | 2018-04-12 | Robert Bosch Gmbh | Electrically actuated valve, in a high pressure pump of a fuel injection system |
| DE102016221457A1 (en) | 2016-11-02 | 2018-05-03 | Robert Bosch Gmbh | Electrically actuated valve, in a high pressure pump of a fuel injection system |
| DE102017204476A1 (en) | 2017-03-17 | 2018-09-20 | Robert Bosch Gmbh | Electrically actuated valve, in a high pressure pump of a fuel injection system |
| DE102017207312A1 (en) * | 2017-05-02 | 2018-11-08 | Robert Bosch Gmbh | Electrically actuated valve for a high-pressure pump of a fuel injection system and pump comprising the valve |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016206180A1 (en) * | 2016-04-13 | 2017-10-19 | Robert Bosch Gmbh | Valve, in particular suction valve, in a high-pressure pump of a fuel injection system |
| DE102016213041A1 (en) | 2016-07-18 | 2018-01-18 | Robert Bosch Gmbh | Pump, in particular high-pressure fuel pump for a fuel injection device |
| IT201700073083A1 (en) * | 2017-06-29 | 2018-12-29 | Bosch Gmbh Robert | PUMP UNIT FOR FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE |
| DE102017222985A1 (en) | 2017-12-18 | 2019-06-19 | Robert Bosch Gmbh | Valve, in particular suction valve, in a high-pressure pump of a fuel injection system |
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| GB2318152A (en) * | 1996-10-10 | 1998-04-15 | Bosch Gmbh Robert | I.c. engine fuel-injection valve with controllable two-stage opening stroke |
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| EP1296061A2 (en) * | 2001-09-21 | 2003-03-26 | Hitachi, Ltd. | High pressure fuel pump |
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| JP2012219758A (en) * | 2011-04-12 | 2012-11-12 | Toyota Motor Corp | Fuel supply device for internal combustion engine |
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| DE102012205346A1 (en) * | 2012-04-02 | 2013-10-02 | Robert Bosch Gmbh | High pressure pump for fuel injection system of internal combustion engine of vehicle, has linear drive that is provided for variable limitation of opening stroke of valve element |
| DE102012205704A1 (en) * | 2012-04-05 | 2013-10-10 | Robert Bosch Gmbh | High pressure pump, particularly for fuel injection system of internal combustion engine, has path adjustment limiting device that is provided as electrically or electromagnetically operated disk with inclined plane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008056001B4 (en) | 2008-11-05 | 2022-04-21 | Vialle Group B.V. | Internal combustion engine with flow-optimized high-pressure fuel pump |
-
2014
- 2014-07-29 DE DE102014214811.1A patent/DE102014214811A1/en not_active Withdrawn
-
2015
- 2015-06-15 WO PCT/EP2015/063285 patent/WO2016015912A1/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2318152A (en) * | 1996-10-10 | 1998-04-15 | Bosch Gmbh Robert | I.c. engine fuel-injection valve with controllable two-stage opening stroke |
| EP1013922A2 (en) * | 1998-12-24 | 2000-06-28 | Isuzu Motors Limited | Variable-delivery high-pressure fuel pump |
| EP1296061A2 (en) * | 2001-09-21 | 2003-03-26 | Hitachi, Ltd. | High pressure fuel pump |
| JP2003148292A (en) * | 2001-11-15 | 2003-05-21 | Hitachi Ltd | High pressure fuel pump |
| DE102006013703A1 (en) * | 2006-03-24 | 2007-09-27 | Robert Bosch Gmbh | Fuel pump for a common rail injection system comprises an actuating device for opening a valve element of an inlet valve during suctioning of a conveyor piston |
| JP2012219758A (en) * | 2011-04-12 | 2012-11-12 | Toyota Motor Corp | Fuel supply device for internal combustion engine |
| DE102011081858A1 (en) * | 2011-08-31 | 2013-02-28 | Robert Bosch Gmbh | Arrangement for controlling delivery rate of e.g. common-rail high pressure pump for delivering fuel, has valve spring supported at position element of actuator, so that travel of spring is increased/decreased by stroke movement of element |
| DE102012205346A1 (en) * | 2012-04-02 | 2013-10-02 | Robert Bosch Gmbh | High pressure pump for fuel injection system of internal combustion engine of vehicle, has linear drive that is provided for variable limitation of opening stroke of valve element |
| DE102012205704A1 (en) * | 2012-04-05 | 2013-10-10 | Robert Bosch Gmbh | High pressure pump, particularly for fuel injection system of internal combustion engine, has path adjustment limiting device that is provided as electrically or electromagnetically operated disk with inclined plane |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017118562A1 (en) * | 2016-01-05 | 2017-07-13 | Continental Automotive Gmbh | Switching valve for a fuel injection system, high-pressure fuel pump for a fuel injection system, and control method for controlling a switching valve in a high-pressure fuel pump |
| DE102016219483A1 (en) | 2016-10-07 | 2018-04-12 | Robert Bosch Gmbh | Electrically actuated valve, in a high pressure pump of a fuel injection system |
| DE102016221457A1 (en) | 2016-11-02 | 2018-05-03 | Robert Bosch Gmbh | Electrically actuated valve, in a high pressure pump of a fuel injection system |
| DE102017204476A1 (en) | 2017-03-17 | 2018-09-20 | Robert Bosch Gmbh | Electrically actuated valve, in a high pressure pump of a fuel injection system |
| DE102017207312A1 (en) * | 2017-05-02 | 2018-11-08 | Robert Bosch Gmbh | Electrically actuated valve for a high-pressure pump of a fuel injection system and pump comprising the valve |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014214811A1 (en) | 2016-02-04 |
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