EP2561213A1 - High-pressure pump - Google Patents

High-pressure pump

Info

Publication number
EP2561213A1
EP2561213A1 EP11712557A EP11712557A EP2561213A1 EP 2561213 A1 EP2561213 A1 EP 2561213A1 EP 11712557 A EP11712557 A EP 11712557A EP 11712557 A EP11712557 A EP 11712557A EP 2561213 A1 EP2561213 A1 EP 2561213A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
head part
pump
housing
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.)
Granted
Application number
EP11712557A
Other languages
German (de)
French (fr)
Other versions
EP2561213B1 (en
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2561213A1 publication Critical patent/EP2561213A1/en
Application granted granted Critical
Publication of EP2561213B1 publication Critical patent/EP2561213B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M59/44—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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • 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
    • F02M59/464—Inlet valves of the check valve 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • F02M59/485—Means for fixing delivery valve casing and barrel to each other or to pump casing
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means

Definitions

  • the invention relates to a high-pressure pump, in particular a radial or
  • the invention relates to the field of fuel pumps for fuel injection systems of air-compression, self-igniting internal combustion engines.
  • a fuel pump with a housing and a drive shaft mounted in the housing is known.
  • two oppositely arranged cylinder heads are provided, which are fixed to the housing.
  • an intake valve and an exhaust valve is integrated.
  • high pressure ports are provided, which are screwed into the respective cylinder head.
  • the fuel pump known from EP 1 013 921 A2 has the disadvantage that the production costs are relatively high. Specifically, high pressure resistant materials must be used for the design of the cylinder heads and it is a processing of these high pressure resistant materials required.
  • the high-pressure pump according to the invention with the features of claim 1 has the advantage that the production costs are reduced. Specifically, the material and
  • the high pressure pump comprises a housing to which the cylinder head is mounted.
  • a plurality of cylinder heads may be provided, which are mounted on the housing.
  • the housing of the high pressure pump can be configured in one or more parts.
  • the pump assembly has a cylinder bore configured in the first cylinder head part and a pump piston guided in the cylinder bore, that the pump piston in the cylinder bore limits the pump working space and that the pump piston can be driven by the drive shaft.
  • a high stability of the first cylinder head part can advantageously be utilized in order to form the cylinder bore with the pump working space.
  • an inlet valve is arranged on the second cylinder head part and that the inlet valve limits the pump working space.
  • Inlet valve to limit the pump work space.
  • the inlet valve may be suitably placed on an end face of the first cylinder head part.
  • An attachment of the intake valve to the first cylinder head part can via the second
  • the second cylinder head part may have a suitable receptacle in which the inlet valve is arranged.
  • an outlet valve is arranged on the first cylinder head part and that in the first cylinder head part a fuel channel is formed which leads from the pump working chamber to the outlet valve.
  • the fuel channel is configured by a stepped bore formed in the first cylinder head part and that the outlet valve is formed in the stepped bore.
  • the exhaust valve can be integrated in an advantageous manner in the first cylinder head part.
  • the outlet valve can be designed as a check valve.
  • the first cylinder head part may be designed as a forged part, so that there are considerable advantages in terms of the strength of the first cylinder head part.
  • the cylinder head part may be formed from a favorable material, in particular from a non-hardened material, so that in this respect a cost reduction with respect to the assembled cylinder head results.
  • the second cylinder head part is configured as a flange and that the second cylinder head part can be screwed to the housing in at least two different screw-on positions. Specifically, four screw-on positions can be provided.
  • the Anschraubpositionen by distinguish a rotation of the cylinder head about an axis of the pump assembly from each other. For example, by rotating the cylinder head by 90 ° or by integer multiples of 90 ° a certain variability with four possible
  • Screwing positions are achieved. With respect to the particular application, then a suitable alignment of the cylinder head with respect to the housing of the
  • the outlet valve or a high-pressure connection of the high-pressure pump provided behind the outlet valve can thereby be aligned relative to the respective application.
  • the second cylinder head part has a lateral recess, which serves for receiving a lateral neck of the first cylinder head part. At the lateral neck of the first cylinder head part of the high pressure port can be provided.
  • the cylinder head can be assembled in a simple manner.
  • the first cylinder head part is formed from a high pressure resistant material and that the second cylinder head part is formed from a low pressure resistant material.
  • the first cylinder head portion may be made of a high grade steel, such as 100CR6.
  • the second cylinder head part may be formed from a low-cost material. The second cylinder head part can in this case fix the first cylinder head part and thus the cylinder head and carry the low-pressure circuit.
  • the cylinder head may be formed as a two-part cylinder head, which is composed of the first cylinder head part and the second cylinder head part.
  • sealing rings and the like may be integrated into the cylinder head, which allow the required tightness at the interfaces in the assembled state.
  • Fig. 1 is a high-pressure pump in a partial, schematic, axial
  • FIG. 2 the high-pressure pump shown in Fig. 1 in a schematic representation of the designated II viewing direction.
  • Fig. 1 shows a high-pressure pump 1 in a partial, schematic, axial sectional view according to an embodiment of the invention.
  • High-pressure pump 1 can be designed in particular as a radial or in-line piston pump. Specifically, the high-pressure pump 1 is suitable as a fuel pump for
  • a preferred use of the high-pressure pump 1 is for a fuel injection system with a common rail that stores diesel fuel under high pressure.
  • the high-pressure pump 1 according to the invention is also suitable for others
  • the high-pressure pump 1 has a housing 2, which may be configured in one or more parts. Further, a drive shaft 3 is provided, which is mounted in a suitable manner in the housing 2. The drive shaft 3 has a cam 4. In operation, the rotates
  • the cam 4 rotates with the drive shaft 3.
  • the cam 4 may be configured as a single or multiple cam. Further, the cam 4 may also be formed by an eccentric portion of the drive shaft 3. Depending on the configuration of the high-pressure pump 1 and other cams on the
  • the housing 2 may also be a housing of a
  • Be internal combustion engine, for example, the cylinder head, and the drive shaft 3 may be a camshaft of the internal combustion engine, are actuated by the gas exchange valves and the cam or the cam 4 for the high-pressure pump 1.
  • the high-pressure pump 1 also has a cylinder head 6.
  • the cylinder head 6 is composed of a first cylinder head part 7 and a second cylinder head part 8.
  • the first cylinder head part 7 is formed of a high pressure resistant material.
  • the first cylinder head part 7 made of a high-quality steel
  • the second cylinder head part 8 is designed as a flange 8.
  • the second cylinder head part 8 may be formed of a low-cost material.
  • the second cylinder head part 8 is formed of a low pressure resistant material.
  • the housing 2 has a plunger bore 10.
  • Cylinder head 6 has a projection 1 1, which extends into the plunger bore 10.
  • first cylinder head part 7 has a cylinder bore 12 in which a pump piston 13 is guided.
  • the pump piston 13 is part of this
  • Pump assembly 14 which is arranged in the region of the plunger bore 10 and the the Cam 4 is assigned.
  • the cam 4 acts in a suitable manner on the pump piston 13, as illustrated by the double arrow 15. For example, via a plunger body, a roller shoe inserted into the plunger body and in the
  • Roller shoe mounted roller which runs on a running surface of the cam 4, a
  • Pump working space 18 is formed.
  • the pump working space 18 is in the first
  • Cylinder head part 7 designed.
  • the pump piston 13 is guided in operation along an axis 19 of the pump assembly 14, wherein the axis 19 is determined by the cylinder bore 12.
  • the housing 2 of the high-pressure pump 1 has an end face 25.
  • the cylinder head 6 is placed on the end face 25 of the housing 2.
  • the first cylinder head part 7 has a circumferential collar 26 in the region of its attachment 11. With the encircling collar 26, the first cylinder head part 7 is supported on the end face 25 of the housing 2.
  • the second cylinder head part 8 has a bearing surface 27, which on the end face 25 of the
  • Housing 2 is applied.
  • the second cylinder head part 8 is fixed to the housing 2.
  • the second cylinder head part 8 also fixes the first cylinder head part 7 on the housing 2. As a result, the entire cylinder head 6 is fastened to the housing 2.
  • the first cylinder head part 7 has a connecting piece 28, which is oriented at least approximately perpendicular to the axis 19. At the nozzle 28, a high-pressure port 29 is formed. Further, a stepped bore 30 is formed on the nozzle 28, which forms a fuel channel 31.
  • a check valve outlet valve 32 is integrated in the neck 28 of the first cylinder head part 7 designed as a check valve outlet valve 32 in the region of a conical step of the stepped bore 30, a valve ball 33 of the outlet valve 32
  • Cylinder head part 7 can be integrated.
  • the second cylinder head part 8 has a recess 34 with a threaded portion 35.
  • a valve piece 36 is inserted in the recess 34.
  • Via a screw ring 37 which is screwed into the threaded portion 35, the valve piece 36 is acted upon against an end face 38 of the first cylinder head part 7.
  • a Sealing ring 39 is provided in the area of the end face 38 , which ensures a seal.
  • a valve stem 40 is provided, which is acted upon by a valve spring 41. Between the valve stem 40 and a valve seat surface 42, a sealing seat is formed.
  • the second cylinder head part 8 has a recess 34 with a threaded portion 35.
  • a valve piece 36 is inserted in the recess 34.
  • Via screw ring 37 which is screwed into the threaded portion 35, the valve piece 36 is acted upon against an end face 38 of the first cylinder head part 7.
  • Cylinder head part 8 a fuel passage 43 configured, which is connected in this embodiment with a further channel portion 44.
  • the channel section 44 is configured here in the housing 2.
  • a sealing ring 45 is arranged to seal the passage of the channel portion 44 of the housing 2 to the fuel channel 43 of the second cylinder head part 8.
  • About the fuel passage 43 is under low pressure fuel to a
  • Inlet valve 46 is guided, which is configured by the valve piece 36, the screw ring 37, the valve stem 40 and the valve spring 41.
  • the intake valve 46 can be integrated into the second cylinder head part 8 in this way.
  • fuel is conducted from the fuel channel 43 via the inlet valve 46 into the pump working chamber 18.
  • the fuel from the pump working chamber 18 via the fuel channel 31 and the exhaust valve 32 is guided to the high pressure port 29.
  • High-pressure port 29 may be a high-pressure line attached to lead the high-pressure fuel to a common rail or the like.
  • the second cylinder head part 8 of the cylinder head 6 is only loaded by the low pressure of the fuel under low pressure.
  • the first cylinder head part 7, however, is the high pressure of the
  • the first cylinder head part 7 is made of a high-pressure-resistant material, in particular a high-grade steel.
  • the second cylinder head part 8 may consist of a
  • FIG. 2 shows the high-pressure pump 1 shown in FIG. 1 in an excerpted, schematic representation from the viewing direction designated II.
  • Cylinder head part 8 of the cylinder head 6 has an edge 50.
  • Embodiment are on the edge 50 four holes 51, 52, 53, 54 configured.
  • the Holes 51 to 54 are distributed uniformly with respect to the axis 19 in the circumferential direction at the edge 50. Between adjacent holes 51 to 54 is given with respect to the axis 19, a distance of 90 °.
  • Through the bores 51 to 54 extend screws 51 ', 52', 53 ', 54', which are screwed into suitable threaded holes of the housing 2.
  • the cylinder head 6 is bolted to the housing 2.
  • the high pressure port 29 on the nozzle 28 of the first cylinder head part 7 is disposed between the bores 51, 54.
  • the cylinder head 6 can also be screwed in a different position to the housing 2. This allows the position of the
  • High pressure port 29 can be changed.
  • the high-pressure port 29 can be pivoted with respect to the axis 19 by 90 ° or by multiples of 90 °. This is possible by an offset screw connection of the second cylinder head part 8 with the first cylinder head part 7 on the housing 2.
  • the bore 51 is offset relative to the axis 55 of the nozzle 28 by an angle 56 of 45 °.
  • the second cylinder head part 8 has a lateral recess 57, which serves to receive the lateral neck 28 of the first cylinder head part 7.
  • the flange 8 can be designed to be open, so that joining of the first cylinder head part 7 into the second cylinder head part 8 is possible.
  • the second cylinder head part 8 is open and closed by the inlet valve 46.
  • the inlet valve 46 is designed here as a suction valve.
  • Exhaust valve 32 for example, as a forged part, has the advantage that a high strength can be achieved.
  • four different positions for the exhaust valve 32 and the downstream high-pressure portion 29 can be realized.
  • a different number of positions is possible. This can be done by a suitable
  • Embodiment of holes on the edge 50 of the second cylinder head part 8 can be realized.

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

A high-pressure pump (1), which is used, in particular, as a radial or series piston pump for fuel injection systems of air-compressing, auto-igniting internal combustion engines, comprises a housing (2), a drive shaft (3) mounted in the housing (2), at least one cylinder head (6) connected to the housing (2), and a pump assembly (14) which is arranged on the cylinder head (6) and can be driven by the drive shaft (3). The cylinder head (6) comprises a first cylinder head part (7) and a second cylinder head part (8). The pump assembly (14) comprises a pump work chamber (18), which is designed in the first cylinder head part (7). The cylinder head (6) is connected to the housing (2) via the second cylinder head part (8). The first cylinder head part (7) is made of a high-pressure-resistant material, while the second cylinder head part (8) is made of a cost-effective material.

Description

Beschreibung Titel  Description title
Hochdruckpumpe Stand der Technik  High pressure pump prior art
Die Erfindung betrifft eine Hochdruckpumpe, insbesondere eine Radial- oder The invention relates to a high-pressure pump, in particular a radial or
Reihenkolbenpumpe. Speziell betrifft die Erfindung das Gebiet der Brennstoffpumpen für Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen. Series piston pump. Specifically, the invention relates to the field of fuel pumps for fuel injection systems of air-compression, self-igniting internal combustion engines.
Aus der EP 1 013 921 A2 ist eine Brennstoffpumpe mit einem Gehäuse und einer in dem Gehäuse gelagerten Antriebswelle bekannt. Hierbei sind zwei gegenüberliegend zueinander angeordnete Zylinderköpfe vorgesehen, die an dem Gehäuse befestigt sind. In die Zylinderköpfe ist hierbei jeweils ein Einlassventil und ein Auslassventil integriert. Ferner sind nach den Auslassventilen der Zylinderköpfe Hochdruckanschlüsse vorgesehen, die in den jeweiligen Zylinderkopf eingeschraubt sind. From EP 1 013 921 A2 a fuel pump with a housing and a drive shaft mounted in the housing is known. Here, two oppositely arranged cylinder heads are provided, which are fixed to the housing. In the cylinder heads in each case an intake valve and an exhaust valve is integrated. Further, after the exhaust valves of the cylinder heads, high pressure ports are provided, which are screwed into the respective cylinder head.
Die aus der EP 1 013 921 A2 bekannte Brennstoffpumpe hat den Nachteil, dass die Herstellungskosten relativ hoch sind. Speziell müssen zur Ausgestaltung der Zylinderköpfe hochdruckfeste Werkstoffe zum Einsatz kommen und es ist eine Bearbeitung dieser hochdruckfesten Werkstoffe erforderlich. The fuel pump known from EP 1 013 921 A2 has the disadvantage that the production costs are relatively high. Specifically, high pressure resistant materials must be used for the design of the cylinder heads and it is a processing of these high pressure resistant materials required.
Offenbarung der Erfindung Die erfindungsgemäße Hochdruckpumpe mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass die Herstellungskosten verringert sind. Speziell ist der Material- und DISCLOSURE OF THE INVENTION The high-pressure pump according to the invention with the features of claim 1 has the advantage that the production costs are reduced. Specifically, the material and
Bearbeitungsaufwand zur Ausgestaltung des Zylinderkopfes verringert. Dieser Vorteil vervielfacht sich mit der Anzahl der an der Hochdruckpumpe vorgesehenen Zylinderköpfe. Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Reduced processing costs for the design of the cylinder head. This advantage is multiplied by the number of cylinder heads provided on the high-pressure pump. The measures listed in the dependent claims are advantageous
Weiterbildungen der im Anspruch 1 angegebenen Hochdruckpumpe möglich. In vorteilhafter Weise umfasst die Hochdruckpumpe ein Gehäuse, an das der Zylinderkopf montiert ist. Hierbei können auch mehrere Zylinderköpfe vorgesehen sein, die an das Gehäuse montiert sind. Hierbei kann der Vorteil einer Ausgestaltung des Zylinderkopfes aus einem ersten Zylinderkopfteil und zumindest einem zweiten Zylinderkopfteil mehrfach ausgenutzt werden. Das Gehäuse der Hochdruckpumpe kann ein oder mehrteilig ausgestaltet sein. Further developments of the specified in claim 1 high pressure pump possible. Advantageously, the high pressure pump comprises a housing to which the cylinder head is mounted. In this case, a plurality of cylinder heads may be provided, which are mounted on the housing. Here, the advantage of an embodiment of the cylinder head from a first cylinder head part and at least one second cylinder head part can be exploited several times. The housing of the high pressure pump can be configured in one or more parts.
Vorteilhaft ist es, dass die Pumpenbaugruppe eine in dem ersten Zylinderkopfteil ausgestaltete Zylinderbohrung und einen in der Zylinderbohrung geführten Pumpenkolben aufweist, dass der Pumpenkolben in der Zylinderbohrung den Pumpenarbeitsraum begrenzt und dass der Pumpenkolben von der Antriebswelle antreibbar ist. Hierdurch kann in vorteilhafter Weise eine hohe Stabilität des ersten Zylinderkopfteils ausgenutzt werden, um die Zylinderbohrung mit dem Pumpenarbeitsraum zu bilden. Ferner ist es vorteilhaft, dass an dem zweiten Zylinderkopfteil ein Einlassventil angeordnet ist und dass das Einlassventil den Pumpenarbeitsraum begrenzt. Hierbei können ein oder mehrere Bauteile des It is advantageous that the pump assembly has a cylinder bore configured in the first cylinder head part and a pump piston guided in the cylinder bore, that the pump piston in the cylinder bore limits the pump working space and that the pump piston can be driven by the drive shaft. As a result, a high stability of the first cylinder head part can advantageously be utilized in order to form the cylinder bore with the pump working space. Furthermore, it is advantageous that an inlet valve is arranged on the second cylinder head part and that the inlet valve limits the pump working space. Here, one or more components of the
Einlassventils den Pumpenarbeitsraum begrenzen. Beispielsweise kann das Einlassventil in geeigneter Weise auf eine Stirnseite des ersten Zylinderkopfteils aufgesetzt sein. Eine Befestigung des Einlassventils an dem ersten Zylinderkopfteil kann über das zweite  Inlet valve to limit the pump work space. For example, the inlet valve may be suitably placed on an end face of the first cylinder head part. An attachment of the intake valve to the first cylinder head part can via the second
Zylinderkopfteil erfolgen. Hierfür kann das zweite Zylinderkopfteil eine geeignete Aufnahme aufweisen, in der das Einlassventil angeordnet ist. Cylinder head part done. For this purpose, the second cylinder head part may have a suitable receptacle in which the inlet valve is arranged.
Vorteilhaft ist es auch, dass an dem ersten Zylinderkopfteil ein Auslassventil angeordnet ist und dass in dem ersten Zylinderkopfteil ein Brennstoffkanal ausgebildet ist, der von dem Pumpenarbeitsraum zu dem Auslassventil führt. Hierbei ist es ferner von Vorteil, dass der Brennstoffkanal durch eine in dem ersten Zylinderkopfteil ausgebildete Stufenbohrung ausgestaltet ist und dass das Auslassventil in der Stufenbohrung ausgebildet ist. Hierdurch kann das Auslassventil in vorteilhafter Weise in das erste Zylinderkopfteil integriert werden. Das Auslassventil kann hierbei als Rückschlagventil ausgestaltet sein. Beispielsweise kann das erste Zylinderkopfteil als Schmiedeteil ausgestaltet sein, so dass sich erhebliche Vorteile bezüglich der Festigkeit des ersten Zylinderkopfteils ergeben. Das zweite It is also advantageous that an outlet valve is arranged on the first cylinder head part and that in the first cylinder head part a fuel channel is formed which leads from the pump working chamber to the outlet valve. Here, it is also advantageous that the fuel channel is configured by a stepped bore formed in the first cylinder head part and that the outlet valve is formed in the stepped bore. As a result, the exhaust valve can be integrated in an advantageous manner in the first cylinder head part. The outlet valve can be designed as a check valve. For example, the first cylinder head part may be designed as a forged part, so that there are considerable advantages in terms of the strength of the first cylinder head part. The second
Zylinderkopfteil kann hingegen aus einem günstigen Material gebildet sein, insbesondere aus einem nicht gehärteten Material, so dass sich diesbezüglich eine Kostenreduktion in Bezug auf den zusammengesetzten Zylinderkopf ergibt. Vorteilhaft ist es auch, dass das zweite Zylinderkopfteil als Flansch ausgestaltet ist und dass das zweite Zylinderkopfteil an dem Gehäuse in zumindest zwei verschiedenen Anschraubpositionen anschraubbar ist. Speziell können vier Anschraubpositionen vorgesehen sein. Hierbei ist es ferner vorteilhaft, dass sich die Anschraubpositionen durch eine Drehung des Zylinderkopfes um eine Achse der Pumpenbaugruppe voneinander unterscheiden. Beispielsweise kann durch Drehen des Zylinderkopfes um 90° oder um ganzzahlige Vielfache von 90° eine gewisse Variabilität mit vier möglichen On the other hand, the cylinder head part may be formed from a favorable material, in particular from a non-hardened material, so that in this respect a cost reduction with respect to the assembled cylinder head results. It is also advantageous that the second cylinder head part is configured as a flange and that the second cylinder head part can be screwed to the housing in at least two different screw-on positions. Specifically, four screw-on positions can be provided. It is also advantageous that the Anschraubpositionen by distinguish a rotation of the cylinder head about an axis of the pump assembly from each other. For example, by rotating the cylinder head by 90 ° or by integer multiples of 90 ° a certain variability with four possible
Anschraubpositionen erzielt werden. In Bezug auf den jeweiligen Anwendungsfall kann dann eine geeignete Ausrichtung des Zylinderkopfes bezüglich des Gehäuses der Screwing positions are achieved. With respect to the particular application, then a suitable alignment of the cylinder head with respect to the housing of the
Hochdruckpumpe erfolgen. Speziell kann dadurch das Auslassventil beziehungsweise ein hinter dem Auslassventil vorgesehener Hochdruckanschluss der Hochdruckpumpe in Bezug auf den jeweiligen Anwendungsfall ausgerichtet werden. Vorteilhaft ist es auch, dass das zweite Zylinderkopfteil eine seitliche Ausnehmung aufweist, die zum Aufnehmen eines seitlichen Stutzens des ersten Zylinderkopfteils dient. An dem seitlichen Stutzen des ersten Zylinderkopfteils kann der Hochdruckanschluss vorgesehen sein. Hierdurch kann der Zylinderkopf in einfacher Weise zusammengesetzt werden. Vorteilhaft ist es auch, dass das erste Zylinderkopfteil aus einem hochdruckfesten Werkstoff gebildet ist und dass das zweite Zylinderkopfteil aus einem niederdruckfesten Werkstoff gebildet ist. Speziell kann das erste Zylinderkopfteil aus einem hochwertigen Stahl, beispielsweise 100CR6 hergestellt sein. Das zweite Zylinderkopfteil kann aus einem kostengünstigen Werkstoff gebildet sein. Das zweite Zylinderkopfteil kann hierbei das erste Zylinderkopfteil und somit den Zylinderkopf fixieren und den Niederdruckkreislauf tragen.  High pressure pump done. In particular, the outlet valve or a high-pressure connection of the high-pressure pump provided behind the outlet valve can thereby be aligned relative to the respective application. It is also advantageous that the second cylinder head part has a lateral recess, which serves for receiving a lateral neck of the first cylinder head part. At the lateral neck of the first cylinder head part of the high pressure port can be provided. As a result, the cylinder head can be assembled in a simple manner. It is also advantageous that the first cylinder head part is formed from a high pressure resistant material and that the second cylinder head part is formed from a low pressure resistant material. Specifically, the first cylinder head portion may be made of a high grade steel, such as 100CR6. The second cylinder head part may be formed from a low-cost material. The second cylinder head part can in this case fix the first cylinder head part and thus the cylinder head and carry the low-pressure circuit.
Speziell kann der Zylinderkopf als zweiteiliger Zylinderkopf ausgebildet sein, der aus dem ersten Zylinderkopfteil und dem zweiten Zylinderkopfteil zusammengesetzt ist. Hierbei können noch Dichtringe und dergleichen in den Zylinderkopf integriert sein, die im zusammengesetzten Zustand die erforderliche Dichtheit an den Schnittstellen ermöglichen. Specifically, the cylinder head may be formed as a two-part cylinder head, which is composed of the first cylinder head part and the second cylinder head part. In this case, sealing rings and the like may be integrated into the cylinder head, which allow the required tightness at the interfaces in the assembled state.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Bevorzugte Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung anhand der beigefügten Zeichnungen, in denen sich entsprechende Elemente mit übereinstimmenden Bezugszeichen versehen sind, näher erläutert. Es zeigt: Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with corresponding reference numerals. It shows:
Fig. 1 eine Hochdruckpumpe in einer auszugsweisen, schematischen, axialen Fig. 1 is a high-pressure pump in a partial, schematic, axial
Schnittdarstellung entsprechend einem Ausführungsbeispiel der Erfindung und Sectional view according to an embodiment of the invention and
Fig. 2 die in Fig. 1 dargestellte Hochdruckpumpe in einer schematischen Darstellung aus der mit II bezeichneten Blickrichtung. Ausführungsformen der Erfindung Fig. 2, the high-pressure pump shown in Fig. 1 in a schematic representation of the designated II viewing direction. Embodiments of the invention
Fig. 1 zeigt eine Hochdruckpumpe 1 in einer auszugsweisen, schematischen, axialen Schnittdarstellung entsprechend einem Ausführungsbeispiel der Erfindung. Die Fig. 1 shows a high-pressure pump 1 in a partial, schematic, axial sectional view according to an embodiment of the invention. The
Hochdruckpumpe 1 kann insbesondere als Radial- oder Reihenkolbenpumpe ausgestaltet sein. Speziell eignet sich die Hochdruckpumpe 1 als Brennstoffpumpe für High-pressure pump 1 can be designed in particular as a radial or in-line piston pump. Specifically, the high-pressure pump 1 is suitable as a fuel pump for
Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen. Ein bevorzugter Einsatz der Hochdruckpumpe 1 besteht für eine Brennstoffeinspritzanlage mit einem Common-Rail, das Dieselbrennstoff unter hohem Druck speichert. Die erfindungsgemäße Hochdruckpumpe 1 eignet sich jedoch auch für andere Fuel injection systems of air-compressing, self-igniting internal combustion engines. A preferred use of the high-pressure pump 1 is for a fuel injection system with a common rail that stores diesel fuel under high pressure. However, the high-pressure pump 1 according to the invention is also suitable for others
Anwendungsfälle. Use cases.
Die Hochdruckpumpe 1 weist ein Gehäuse 2 auf, das ein- oder mehrteilig ausgestaltet sein kann. Ferner ist eine Antriebswelle 3 vorgesehen, die auf geeignete Weise in dem Gehäuse 2 gelagert ist. Die Antriebswelle 3 weist einen Nocken 4 auf. Im Betrieb rotiert die The high-pressure pump 1 has a housing 2, which may be configured in one or more parts. Further, a drive shaft 3 is provided, which is mounted in a suitable manner in the housing 2. The drive shaft 3 has a cam 4. In operation, the rotates
Antriebswelle 3 um ihre Drehachse 5. Hierbei rotiert der Nocken 4 mit der Antriebswelle 3. Der Nocken 4 kann als Ein- oder Mehrfachnocken ausgestaltet sein. Ferner kann der Nocken 4 auch durch einen exzentrischen Abschnitt der Antriebswelle 3 gebildet sein. Je nach Ausgestaltung der Hochdruckpumpe 1 können auch weitere Nocken an der  Drive shaft 3 about its axis of rotation 5. In this case, the cam 4 rotates with the drive shaft 3. The cam 4 may be configured as a single or multiple cam. Further, the cam 4 may also be formed by an eccentric portion of the drive shaft 3. Depending on the configuration of the high-pressure pump 1 and other cams on the
Antriebswelle 3 vorgesehen sein. Das Gehäuse 2 kann auch ein Gehäuse einer Drive shaft 3 may be provided. The housing 2 may also be a housing of a
Brennkraftmaschine sein, beispielsweise deren Zylinderkopf, und die Antriebswelle 3 kann eine Nockenwelle der Brennkraftmaschine sein, durch die deren Gaswechselventile betätigt werden und die den oder die Nocken 4 für die Hochdruckpumpe 1 aufweist. Die Hochdruckpumpe 1 weist außerdem einen Zylinderkopf 6 auf. Der Zylinderkopf 6 ist aus einem ersten Zylinderkopfteil 7 und einem zweiten Zylinderkopfteil 8 zusammengesetzt. Hierbei ist das erste Zylinderkopfteil 7 aus einem hochdruckfesten Werkstoff gebildet.  Be internal combustion engine, for example, the cylinder head, and the drive shaft 3 may be a camshaft of the internal combustion engine, are actuated by the gas exchange valves and the cam or the cam 4 for the high-pressure pump 1. The high-pressure pump 1 also has a cylinder head 6. The cylinder head 6 is composed of a first cylinder head part 7 and a second cylinder head part 8. Here, the first cylinder head part 7 is formed of a high pressure resistant material.
Beispielsweise kann das erste Zylinderkopfteil 7 aus einem hochwertigen Stahl, For example, the first cylinder head part 7 made of a high-quality steel,
insbesondere 100CR6 hergestellt sein. Das zweite Zylinderkopfteil 8 ist als Flansch 8 ausgestaltet. Hierbei kann das zweite Zylinderkopfteil 8 aus einem günstigen Werkstoff gebildet sein. Speziell ist das zweite Zylinderkopfteil 8 aus einem niederdruckfesten Werkstoff gebildet. especially 100CR6. The second cylinder head part 8 is designed as a flange 8. Here, the second cylinder head part 8 may be formed of a low-cost material. Specifically, the second cylinder head part 8 is formed of a low pressure resistant material.
Das Gehäuse 2 weist eine Stößelbohrung 10 auf. Das erste Zylinderkopfteil 7 des The housing 2 has a plunger bore 10. The first cylinder head part 7 of the
Zylinderkopfes 6 weist einen Ansatz 1 1 auf, der sich in die Stößelbohrung 10 erstreckt. Außerdem weist das erste Zylinderkopfteil 7 eine Zylinderbohrung 12 auf, in der ein Pumpenkolben 13 geführt ist. Der Pumpenkolben 13 ist hierbei Teil einer Cylinder head 6 has a projection 1 1, which extends into the plunger bore 10. In addition, the first cylinder head part 7 has a cylinder bore 12 in which a pump piston 13 is guided. The pump piston 13 is part of this
Pumpenbaugruppe 14, die im Bereich der Stößelbohrung 10 angeordnet ist und die dem Nocken 4 zugeordnet ist. Der Nocken 4 wirkt auf geeignete Weise auf den Pumpenkolben 13 ein, wie es durch den Doppelpfeil 15 veranschaulicht ist. Beispielsweise kann über einen Stößelkörper, einen in den Stößelkörper eingesetzten Rollenschuh und eine in dem Pump assembly 14, which is arranged in the region of the plunger bore 10 and the the Cam 4 is assigned. The cam 4 acts in a suitable manner on the pump piston 13, as illustrated by the double arrow 15. For example, via a plunger body, a roller shoe inserted into the plunger body and in the
Rollenschuh gelagerte Rolle, die auf einer Lauffläche des Nockens 4 läuft, eine Roller shoe mounted roller, which runs on a running surface of the cam 4, a
Wirkverbindung zwischen dem Nocken 4 und dem Pumpenkolben 13 zum Antreiben der Pumpenbaugruppe 14 geschaffen sein. Eine Rückstellung solch eines Stößelkörpers kann hierbei über eine Stößelfeder 16 erfolgen, die den Ansatz 1 1 abschnittsweise umschließt. Hierdurch kommt es während der Rotation der Antriebswelle 3 um ihre Drehachse 5 zu einer Hin- und Herbewegung des Pumpenkolbens 13 in der Zylinderbohrung 12. Actual connection between the cam 4 and the pump piston 13 may be provided for driving the pump assembly 14. A provision of such a plunger body can in this case take place via a plunger spring 16, which surrounds the approach 1 1 sections. This results during the rotation of the drive shaft 3 about its axis of rotation 5 to a reciprocating motion of the pump piston 13 in the cylinder bore 12th
Am Ende der Zylinderbohrung 12 ist ein durch eine Stirnfläche 17 begrenzter At the end of the cylinder bore 12 is limited by an end face 17
Pumpenarbeitsraum 18 ausgebildet. Der Pumpenarbeitsraum 18 ist in dem ersten Pump working space 18 is formed. The pump working space 18 is in the first
Zylinderkopfteil 7 ausgestaltet. Der Pumpenkolben 13 ist im Betrieb entlang einer Achse 19 der Pumpenbaugruppe 14 geführt, wobei die Achse 19 durch die Zylinderbohrung 12 bestimmt ist. Cylinder head part 7 designed. The pump piston 13 is guided in operation along an axis 19 of the pump assembly 14, wherein the axis 19 is determined by the cylinder bore 12.
Das Gehäuse 2 der Hochdruckpumpe 1 weist eine Stirnseite 25 auf. Der Zylinderkopf 6 ist auf die Stirnseite 25 des Gehäuses 2 aufgesetzt. Das erste Zylinderkopfteil 7 weist einen umlaufenden Bund 26 im Bereich seines Ansatzes 1 1 auf. Mit dem umlaufenden Bund 26 stützt sich das erste Zylinderkopfteil 7 an der Stirnseite 25 des Gehäuses 2 ab. Ferner weist das zweite Zylinderkopfteil 8 eine Anlagefläche 27 auf, die an der Stirnseite 25 des The housing 2 of the high-pressure pump 1 has an end face 25. The cylinder head 6 is placed on the end face 25 of the housing 2. The first cylinder head part 7 has a circumferential collar 26 in the region of its attachment 11. With the encircling collar 26, the first cylinder head part 7 is supported on the end face 25 of the housing 2. Furthermore, the second cylinder head part 8 has a bearing surface 27, which on the end face 25 of the
Gehäuses 2 anliegt. Das zweite Zylinderkopfteil 8 ist an dem Gehäuse 2 befestigt. Housing 2 is applied. The second cylinder head part 8 is fixed to the housing 2.
Hierdurch fixiert das zweite Zylinderkopfteil 8 auch das erste Zylinderkopfteil 7 an dem Gehäuse 2. Dadurch ist der gesamte Zylinderkopf 6 an dem Gehäuse 2 befestigt. As a result, the second cylinder head part 8 also fixes the first cylinder head part 7 on the housing 2. As a result, the entire cylinder head 6 is fastened to the housing 2.
Das erste Zylinderkopfteil 7 weist einen Stutzen 28 auf, der zumindest näherungsweise senkrecht zu der Achse 19 orientiert ist. An dem Stutzen 28 ist ein Hochdruckanschluss 29 ausgebildet. Ferner ist an dem Stutzen 28 eine Stufenbohrung 30 ausgebildet, die einen Brennstoffkanal 31 bildet. Hierbei ist in dem Stutzen 28 des ersten Zylinderkopfteils 7 ein als Rückschlagventil ausgestaltetes Auslassventil 32 integriert. Hierbei ist im Bereich einer konischen Stufe der Stufenbohrung 30 eine Ventilkugel 33 des Auslassventils 32 The first cylinder head part 7 has a connecting piece 28, which is oriented at least approximately perpendicular to the axis 19. At the nozzle 28, a high-pressure port 29 is formed. Further, a stepped bore 30 is formed on the nozzle 28, which forms a fuel channel 31. Here, in the neck 28 of the first cylinder head part 7 designed as a check valve outlet valve 32 is integrated. Here, in the region of a conical step of the stepped bore 30, a valve ball 33 of the outlet valve 32
angeordnet. Somit kann in vorteilhafter Weise das Auslassventil 32 in das erste arranged. Thus, advantageously, the exhaust valve 32 in the first
Zylinderkopfteil 7 integriert werden. Das zweite Zylinderkopfteil 8 weist eine Aussparung 34 mit einem Gewindeabschnitt 35 auf. In die Aussparung 34 ist ein Ventilstück 36 eingesetzt. Über einen Schraubring 37, der in den Gewindeabschnitt 35 eingeschraubt ist, wird das Ventilstück 36 gegen eine Stirnseite 38 des ersten Zylinderkopfteils 7 beaufschlagt. Hierbei ist im Bereich der Stirnseite 38 ein Dichtring 39 vorgesehen, der eine Abdichtung gewährleistet. Ferner ist ein Ventilstößel 40 vorgesehen, der von einer Ventilfeder 41 beaufschlagt ist. Zwischen dem Ventilstößel 40 und einer Ventilsitzfläche 42 ist ein Dichtsitz gebildet. Außerdem ist in dem zweiten Cylinder head part 7 can be integrated. The second cylinder head part 8 has a recess 34 with a threaded portion 35. In the recess 34, a valve piece 36 is inserted. Via a screw ring 37, which is screwed into the threaded portion 35, the valve piece 36 is acted upon against an end face 38 of the first cylinder head part 7. Here, in the area of the end face 38 a Sealing ring 39 is provided, which ensures a seal. Further, a valve stem 40 is provided, which is acted upon by a valve spring 41. Between the valve stem 40 and a valve seat surface 42, a sealing seat is formed. In addition, in the second
Zylinderkopfteil 8 ein Brennstoffkanal 43 ausgestaltet, der in diesem Ausführungsbeispiel mit einem weiteren Kanalabschnitt 44 verbunden ist. Der Kanalabschnitt 44 ist hierbei in dem Gehäuse 2 ausgestaltet. Im Bereich der Stirnseite 25 ist ein Dichtring 45 angeordnet, um den Übergang von dem Kanalabschnitt 44 des Gehäuses 2 auf den Brenn stoffkanal 43 des zweiten Zylinderkopfteils 8 abzudichten. Über den Brennstoffkanal 43 wird unter niedrigem Druck stehender Brennstoff zu einemCylinder head part 8, a fuel passage 43 configured, which is connected in this embodiment with a further channel portion 44. The channel section 44 is configured here in the housing 2. In the region of the end face 25, a sealing ring 45 is arranged to seal the passage of the channel portion 44 of the housing 2 to the fuel channel 43 of the second cylinder head part 8. About the fuel passage 43 is under low pressure fuel to a
Einlassventil 46 geführt, das durch das Ventilstück 36, den Schraubring 37, den Ventilstößel 40 und die Ventilfeder 41 ausgestaltet ist. Das Einlassventil 46 kann auf diese Weise in das zweite Zylinderkopfteil 8 integriert werden. Bei einem Saughub des Pumpenkolbens 13 wird Brennstoff aus dem Brenn stoffkanal 43 über das Einlassventil 46 in den Pumpenarbeitsraum 18 geführt. Bei einem anschließenden Förderhub wird der Brennstoff aus dem Pumpenarbeitsraum 18 über den Brenn stoffkanal 31 und das Auslassventil 32 zu dem Hochdruckanschluss 29 geführt. An dem Inlet valve 46 is guided, which is configured by the valve piece 36, the screw ring 37, the valve stem 40 and the valve spring 41. The intake valve 46 can be integrated into the second cylinder head part 8 in this way. During a suction stroke of the pump piston 13, fuel is conducted from the fuel channel 43 via the inlet valve 46 into the pump working chamber 18. In a subsequent delivery stroke, the fuel from the pump working chamber 18 via the fuel channel 31 and the exhaust valve 32 is guided to the high pressure port 29. To the
Hochdruckanschluss 29 kann eine Hochdruckleitung angebracht sein, um den unter hohem Druck stehenden Brennstoff zu einem Common-Rail oder dergleichen zu führen. High-pressure port 29 may be a high-pressure line attached to lead the high-pressure fuel to a common rail or the like.
Im Betrieb der Hochdruckpumpe 1 wird das zweite Zylinderkopfteil 8 des Zylinderkopfes 6 lediglich von dem Niederdruck des unter niedrigen Druck stehenden Brennstoffs belastet. Das erste Zylinderkopfteil 7 wird hingegen von dem Hochdruck des von dem During operation of the high pressure pump 1, the second cylinder head part 8 of the cylinder head 6 is only loaded by the low pressure of the fuel under low pressure. The first cylinder head part 7, however, is the high pressure of the
Pumpenkolben 13 geförderten, unter hohem Druck stehenden Brennstoffs belastet. Das erste Zylinderkopfteil 7 ist aus einem hochdruckbeständigen Werkstoff, insbesondere einem hochwertigen Stahl, gebildet. Das zweite Zylinderkopfteil 8 kann aus einem Pump piston 13 funded, loaded under high pressure fuel. The first cylinder head part 7 is made of a high-pressure-resistant material, in particular a high-grade steel. The second cylinder head part 8 may consist of a
kostengünstigen Werkstoff hergestellt werden, der lediglich niederdruckbeständig sein muss. Somit ergibt sich durch die zweiteilige Ausgestaltung des Zylinderkopfes 6 eine Reduzierung des Herstellungsaufwands und der Herstellungskosten. inexpensive material to be produced, which only has to be low pressure resistant. Thus, due to the two-part design of the cylinder head 6, a reduction of the production costs and the manufacturing costs.
Die Ausgestaltung der Hochdruckpumpe 1 des Ausführungsbeispiels ist im Folgenden auch unter Bezugnahme auf die Fig. 2 im weiteren Detail beschrieben. Fig. 2 zeigt die in Fig. 1 dargestellte Hochdruckpumpe 1 in einer auszugsweisen, schematischen Darstellung aus der mit II bezeichneten Blickrichtung. Das zweite The design of the high-pressure pump 1 of the exemplary embodiment is described below with reference to FIG. 2 in further detail. FIG. 2 shows the high-pressure pump 1 shown in FIG. 1 in an excerpted, schematic representation from the viewing direction designated II. The second
Zylinderkopfteil 8 des Zylinderkopfs 6 weist einen Rand 50 auf. In diesem Cylinder head part 8 of the cylinder head 6 has an edge 50. In this
Ausführungsbeispiel sind an dem Rand 50 vier Bohrungen 51 , 52, 53, 54 ausgestaltet. Die Bohrungen 51 bis 54 sind dabei bezüglich der Achse 19 in Umfangsrichtung gleichmäßig an dem Rand 50 verteilt. Zwischen benachbarten Bohrungen 51 bis 54 ist in Bezug auf die Achse 19 ein Abstand von 90° gegeben. Durch die Bohrungen 51 bis 54 erstrecken sich Schrauben 51 ', 52', 53', 54', die in geeignete Gewindebohrungen des Gehäuses 2 eingeschraubt sind. Somit ist der Zylinderkopf 6 mit dem Gehäuse 2 verschraubt. Embodiment are on the edge 50 four holes 51, 52, 53, 54 configured. The Holes 51 to 54 are distributed uniformly with respect to the axis 19 in the circumferential direction at the edge 50. Between adjacent holes 51 to 54 is given with respect to the axis 19, a distance of 90 °. Through the bores 51 to 54 extend screws 51 ', 52', 53 ', 54', which are screwed into suitable threaded holes of the housing 2. Thus, the cylinder head 6 is bolted to the housing 2.
Der Hochdruckanschluss 29 am Stutzen 28 des ersten Zylinderkopfteils 7 ist zwischen den Bohrungen 51 , 54 angeordnet. Der Zylinderkopf 6 kann auch in einer anderen Position an das Gehäuse 2 angeschraubt werden. Hierdurch kann die Position des The high pressure port 29 on the nozzle 28 of the first cylinder head part 7 is disposed between the bores 51, 54. The cylinder head 6 can also be screwed in a different position to the housing 2. This allows the position of the
Hochdruckanschlusses 29 verändert werden. In diesem Ausführungsbeispiel kann der Hochdruckanschluss 29 in Bezug auf die Achse 19 um 90° oder um Vielfache von 90° verschwenkt angeordnet werden. Dies ist durch eine versetzte Verschraubung des zweiten Zylinderkopfteils 8 mit dem ersten Zylinderkopfteil 7 an dem Gehäuse 2 möglich. High pressure port 29 can be changed. In this embodiment, the high-pressure port 29 can be pivoted with respect to the axis 19 by 90 ° or by multiples of 90 °. This is possible by an offset screw connection of the second cylinder head part 8 with the first cylinder head part 7 on the housing 2.
Vorzugsweise ist die Bohrung 51 gegenüber der Achse 55 des Stutzens 28 um einen Winkel 56 von 45° versetzt angeordnet. Außerdem weist das zweite Zylinderkopfteil 8 eine seitliche Ausnehmung 57 auf, die zum Aufnehmen des seitlichen Stutzens 28 des ersten Zylinderkopfteils 7 dient. Hierdurch ist ein einfaches Zusammensetzen des Zylinderkopfes 6 aus den beiden Zylinderkopfteilen 7, 8 möglich. Somit kann im Bereich des Auslassventils 32 der Flansch 8 offen ausgestaltet sein, so dass ein Fügen des ersten Zylinderkopfteils 7 in das zweite Zylinderkopfteil 8 möglich ist. Nach oben ist das zweite Zylinderkopfteil 8 offen und durch das Einlassventil 46 geschlossen. Das Einlassventil 46 ist hierbei als Saugventil ausgestaltet. Die einstückige Ausgestaltung des ersten Zylinderkopfteils 7 mit dem integrierten Preferably, the bore 51 is offset relative to the axis 55 of the nozzle 28 by an angle 56 of 45 °. In addition, the second cylinder head part 8 has a lateral recess 57, which serves to receive the lateral neck 28 of the first cylinder head part 7. As a result, a simple assembly of the cylinder head 6 from the two cylinder head parts 7, 8 is possible. Thus, in the region of the outlet valve 32, the flange 8 can be designed to be open, so that joining of the first cylinder head part 7 into the second cylinder head part 8 is possible. Upwards, the second cylinder head part 8 is open and closed by the inlet valve 46. The inlet valve 46 is designed here as a suction valve. The one-piece design of the first cylinder head part 7 with the integrated
Auslassventil 32, beispielsweise als Schmiedeteil, hat den Vorteil, dass eine hohe Festigkeit erzielbar ist. In diesem Ausführungsbeispiel können vier verschiedene Positionen für das Auslassventil 32 und den nachgeordneten Hochdruckanteil 29 realisiert werden. Hierbei ist auch eine andere Anzahl an Positionen möglich. Dies kann durch eine geeignete  Exhaust valve 32, for example, as a forged part, has the advantage that a high strength can be achieved. In this embodiment, four different positions for the exhaust valve 32 and the downstream high-pressure portion 29 can be realized. Here also a different number of positions is possible. This can be done by a suitable
Ausgestaltung von Bohrungen an dem Rand 50 des zweiten Zylinderkopfteils 8 realisiert werden. Embodiment of holes on the edge 50 of the second cylinder head part 8 can be realized.
Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt. The invention is not limited to the described embodiments.

Claims

Ansprüche claims
1. Hochdruckpumpe (1 ), insbesondere Radial- oder Reihenkolbenpumpe für 1. high-pressure pump (1), in particular radial or inline piston pump for
Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen, mit einem Gehäuse (2), einer in dem Gehäuse (2) gelagerten Antriebswelle (3), zumindest einem mit dem Gehäuse (2) verbundenen Zylinderkopf (6) und zumindest einer an dem Zylinderkopf (6) angeordneten Pumpenbaugruppe (14), die von der Antriebswelle (3) antreibbar ist, wobei der Zylinderkopf (6) ein erstes Zylinderkopfteil (7) und zumindest ein zweites Zylinderkopfteil (8) aufweist, wobei die Pumpenbaugruppe (14) einen Fuel injection systems of air-compressing, self-igniting internal combustion engines, comprising a housing (2), a drive shaft (3) mounted in the housing (2), at least one cylinder head (6) connected to the housing (2) and at least one arranged on the cylinder head (6) Pump assembly (14) which is driven by the drive shaft (3), wherein the cylinder head (6) comprises a first cylinder head part (7) and at least a second cylinder head part (8), wherein the pump assembly (14)
Pumpenarbeitsraum (18) aufweist, der in dem ersten Zylinderkopfteil (7) ausgestaltet ist, und wobei der Zylinderkopf (6) über das zweite Zylinderkopfteil (8) mit dem Gehäuse (2) verbunden ist. Pump working space (18) which is configured in the first cylinder head part (7), and wherein the cylinder head (6) via the second cylinder head part (8) is connected to the housing (2).
2. Hochdruckpumpe nach Anspruch 1 , 2. High-pressure pump according to claim 1,
dadurch gekennzeichnet, characterized,
dass die Pumpenbaugruppe (14) eine in dem ersten Zylinderkopfteil (7) ausgestaltetethe pump assembly (14) is configured in the first cylinder head part (7)
Zylinderbohrung (12) und einen in der Zylinderbohrung (12) geführten Pumpenkolben (13) aufweist, dass der Pumpenkolben (13) in der Zylinderbohrung (12) den Pumpenarbeitsraum (18) begrenzt und dass der Pumpenkolben (13) von der Antriebswelle (3) antreibbar ist. Cylinder bore (12) and a in the cylinder bore (12) guided pump piston (13), that the pump piston (13) in the cylinder bore (12) limits the pump working space (18) and that the pump piston (13) from the drive shaft (3) is drivable.
3. Hochdruckpumpe nach Anspruch 1 oder 2, 3. High-pressure pump according to claim 1 or 2,
dadurch gekennzeichnet, characterized,
dass an dem zweiten Zylinderkopfteil (8) ein Einlassventil (46) angeordnet ist und dass das Einlassventil (46) den Pumpenarbeitsraum (18) begrenzt. in that an inlet valve (46) is arranged on the second cylinder head part (8) and that the inlet valve (46) limits the pump working space (18).
4. Hochdruckpumpe nach einem der Ansprüche 1 bis 3, 4. High-pressure pump according to one of claims 1 to 3,
dadurch gekennzeichnet, characterized,
dass an dem ersten Zylinderkopfteil (7) ein Auslassventil (32) angeordnet ist und dass in dem ersten Zylinderkopfteil (7) ein Brenn stoffkanal (31 ) ausgebildet ist, der von dem Pumpenarbeitsraum (18) zu dem Auslassventil (32) führt. in that an exhaust valve (32) is arranged on the first cylinder head part (7) and in that a fuel channel (31) is formed in the first cylinder head part (7) leading from the pump working space (18) to the exhaust valve (32).
5. Hochdruckpumpe nach Anspruch 4, 5. High-pressure pump according to claim 4,
dadurch gekennzeichnet, dass der Brennstoffkanal (31 ) durch eine in dem ersten Zylinderkopfteil (7) ausgebildete Stufenbohrung (30) ausgestaltet ist und dass das Auslassventil (32) in der Stufenbohrung (30) ausgebildet ist. characterized, in that the fuel channel (31) is configured by a stepped bore (30) formed in the first cylinder head part (7), and in that the outlet valve (32) is formed in the stepped bore (30).
6. Hochdruckpumpe nach einem der Ansprüche 1 bis 5, 6. High-pressure pump according to one of claims 1 to 5,
dadurch gekennzeichnet, characterized,
dass das zweite Zylinderkopfteil (8) als Flansch ausgestaltet ist und dass das zweite Zylinderkopfteil (8) an dem Gehäuse (2) in zumindest zwei verschiedenen in that the second cylinder head part (8) is designed as a flange and in that the second cylinder head part (8) on the housing (2) is designed in at least two different ones
Anschraubpositionen anschraubbar ist. Screw-on positions can be screwed.
7. Hochdruckpumpe nach Anspruch 6, 7. High-pressure pump according to claim 6,
dadurch gekennzeichnet, characterized,
dass sich die Anschraubpositionen durch eine Drehung des Zylinderkopfes (6) um eine Achse (19) der Pumpenbaugruppe (14) voneinander unterscheiden. in that the screw-on positions differ from each other by a rotation of the cylinder head (6) about an axis (19) of the pump assembly (14).
8. Hochdruckpumpe nach einem der Ansprüche 1 bis 7, 8. High-pressure pump according to one of claims 1 to 7,
dadurch gekennzeichnet, characterized,
dass das zweite Zylinderkopfteil (8) eine seitliche Ausnehmung (57) aufweist, die zum Aufnehmen eines seitlichen Stutzens (28) des ersten Zylinderkopfteils (7) dient. in that the second cylinder head part (8) has a lateral recess (57) which serves to receive a lateral connecting piece (28) of the first cylinder head part (7).
9. Hochdruckpumpe nach einem der Ansprüche 1 bis 8, 9. High-pressure pump according to one of claims 1 to 8,
dadurch gekennzeichnet, characterized,
dass das erste Zylinderkopfteil (7) aus einem hochdruckfesten Werkstoff gebildet ist und dass das zweite Zylinderkopfteil (8) aus einem niederdruckfesten Werkstoff gebildet ist. in that the first cylinder head part (7) is formed from a high-pressure-resistant material and that the second cylinder head part (8) is formed from a low-pressure-resistant material.
10. Hochdruckpumpe nach einem der Ansprüche 1 bis 9, 10. High-pressure pump according to one of claims 1 to 9,
dadurch gekennzeichnet, characterized,
dass der Zylinderkopf (6) als zweiteiliger Zylinderkopf (6) ausgebildet ist, der aus dem ersten Zylinderkopfteil (7) und dem zweiten Zylinderkopfteil (8) zusammengesetzt ist. in that the cylinder head (6) is designed as a two-part cylinder head (6) composed of the first cylinder head part (7) and the second cylinder head part (8).
EP11712557.5A 2010-04-21 2011-04-06 High pressure pump Not-in-force EP2561213B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010028036 DE102010028036A1 (en) 2010-04-21 2010-04-21 high pressure pump
PCT/EP2011/055328 WO2011131481A1 (en) 2010-04-21 2011-04-06 High-pressure pump

Publications (2)

Publication Number Publication Date
EP2561213A1 true EP2561213A1 (en) 2013-02-27
EP2561213B1 EP2561213B1 (en) 2016-01-20

Family

ID=44187859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11712557.5A Not-in-force EP2561213B1 (en) 2010-04-21 2011-04-06 High pressure pump

Country Status (4)

Country Link
EP (1) EP2561213B1 (en)
CN (1) CN102844559B (en)
DE (1) DE102010028036A1 (en)
WO (1) WO2011131481A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102011089953A1 (en) 2011-12-27 2013-06-27 Robert Bosch Gmbh Suction valve for high pressure fuel pump for fuel injection system of internal combustion engine, has chamber provided in valve housing such that valve shaft is inserted in chamber, and housing that is provided with polygonal socket
DE102013204327A1 (en) * 2013-03-13 2014-09-18 Robert Bosch Gmbh Cylinder head blank, cylinder head and high-pressure pump for fuel injection systems
DE102013210036A1 (en) * 2013-05-29 2014-12-04 Robert Bosch Gmbh High pressure pump for a fuel injection system
DE102013212261A1 (en) * 2013-06-26 2014-12-31 Robert Bosch Gmbh high pressure pump
WO2015169621A1 (en) * 2014-05-05 2015-11-12 Robert Bosch Gmbh High-pressure pump for feeding fuel to an internal combustion engine
GB201516704D0 (en) * 2015-09-21 2015-11-04 Delphi Int Operations Lux Srl Fuel pump assembly

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GB2170558B (en) * 1985-02-02 1988-05-25 Lucas Ind Plc Liquid fuel injection pump
DE3622633A1 (en) * 1985-07-20 1987-01-22 Bosch Gmbh Robert METHOD FOR ATTACHING AN INJECTION PUMP TO AN INTERNAL COMBUSTION ENGINE, AND RELATED COMBUSTION ENGINE
DE19719265A1 (en) * 1997-05-07 1998-11-12 Deutz Ag Internal combustion engine with fuel pump in the crankcase
JP4088738B2 (en) 1998-12-25 2008-05-21 株式会社デンソー Fuel injection pump
ITMI20071202A1 (en) * 2007-06-14 2008-12-15 Bosch Gmbh Robert HIGH PRESSURE PUMP FOR FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE AND HAVING A DRIVE SHAFT
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Also Published As

Publication number Publication date
CN102844559A (en) 2012-12-26
DE102010028036A1 (en) 2011-10-27
EP2561213B1 (en) 2016-01-20
CN102844559B (en) 2016-04-27
WO2011131481A1 (en) 2011-10-27

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