EP2652326A1 - Hochdruckpumpe - Google Patents
HochdruckpumpeInfo
- Publication number
- EP2652326A1 EP2652326A1 EP11778860.4A EP11778860A EP2652326A1 EP 2652326 A1 EP2652326 A1 EP 2652326A1 EP 11778860 A EP11778860 A EP 11778860A EP 2652326 A1 EP2652326 A1 EP 2652326A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure pump
- drive shaft
- pump
- rotation
- roller
- 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
Links
- 239000000446 fuel Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0413—Cams
- F04B1/0417—Cams consisting of two or more cylindrical elements, e.g. rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2307/00—Preventing the rotation of tappets
Definitions
- the present invention relates to a high-pressure pump for a fuel injection device of an internal combustion engine according to the preamble of claim 1.
- high pressure pumps For pressurizing the fuel at high pressure in a fuel injection system, such as in a common rail system, among other high pressure pumps with one or more pump pistons are used, which indirectly from a drive shaft, for example via a cam or an eccentric, which with a roller of a plunger assembly is in contact, be placed in a stroke movement to perform a suction stroke and a pressure stroke.
- a suction stroke fuel is sucked into a pump working space of the high pressure pump, and during the pressure stroke, the sucked fuel is compressed and output to the high pressure accumulator of the common rail system.
- Such high-pressure pumps can be designed as a plug-in pump.
- DE 10 2008 041 383 A1 describes a plug-in pump for feeding highly compressed fuel into a high-pressure accumulator for supplying a combustion chamber of an internal combustion engine, wherein the plug-in pump comprises a housing having a pump chamber by a suction line with a suction valve and by a high-pressure line with a High pressure valve is connected.
- a plug-pump high-pressure pump is described in DE 10 2008 001 018 A1.
- the high-pressure pump has a pump housing and a pump piston, which is displaceably guided in a pump cylinder head and can be moved via a camshaft of the internal combustion engine for intake 5 and compression of fuel.
- the pump piston is on an am
- a rod seal 10 is disposed between the plunger body and the pump housing and placed between plunger body and roller shoe, an O-ring.
- a high-pressure pump for a fuel injection system of an internal combustion engine, wherein the high-pressure pump has at least one pump piston, which is generated by the rotation of a drive shaft
- the plunger assembly comprises a plunger body and a roller, wherein the stable alignment
- the anti-rotation device is formed by a projection provided on the tappet body, which projection bears in a form-fitting manner on a recess formed in the cam or eccentric arranged on the drive shaft.
- This configuration of the anti-twist device is structurally easy to implement. An elaborate machining of the plunger bore in the engine block or in the pump housing is not necessary. Also, the guide diameter of the plunger body is not reduced or weakened thereby.
- the projection is formed as a guide tongue on the plunger body. The guide tongue can also be designed in several parts depending on the design and manufacturing conditions of the plunger body.
- the recess is formed as a running groove.
- the formation of the running groove in the cam or eccentric is a particularly cost-effective solution, since the running groove in the drive shaft during turning can be made cost-neutral.
- the guide tongue is formed integrally with the plunger body.
- the guide tongue projects beyond the raceway of the drive shaft.
- a game or a minimum clearance is provided between the track of the drive shaft and the guide tongue.
- the guide tongue has a contact surface which is opposite to the running groove, wherein the contact surface is convex or arched, in particular substantially convex.
- the roller is rotatably mounted via a bolt and a socket arranged on the bolt.
- the guide tongue is through the
- parts of the high-pressure pump in particular a cylinder head and / or a drive, are designed as a plug-in pump unit.
- the plug-in pump unit for example, the plunger assembly allows easy installation in the engine block or in the pump housing.
- FIG. 1 shows a section through a high pressure pump according to an embodiment.
- FIG. 2 is a partial sectional view of a plunger assembly according to an embodiment
- FIG. 3 is a sectional view of a plunger assembly and a drive shaft according to one embodiment
- Fig. 4 is a schematic representation for calculating the game.
- FIG. 1 shows a section through a high-pressure pump 1 designed as a plug-in pump for a fuel injection system.
- the high-pressure pump 1 shown here is used in a common-ail system.
- the high-pressure pump 1 has a pump housing 2 with a cylinder head 3, in which a pump element with a pump piston 4, which by a not shown here rotatably driven drive shaft (see FIG. 3) is driven indirectly in a lifting movement in at least approximately radial direction to a rotational axis of the drive shaft.
- the pump piston 4 is guided in a cylinder bore 5 in a shank portion 6 of the cylinder head 3 tightly displaceable and limited with its end facing away from the drive shaft in the cylinder bore 5 a pump working space 7.
- a spring 8 is arranged to the shaft portion 6 around.
- the pump working chamber 7 is supplied via a fuel inlet 9 from a fuel tank, not shown, of the high-pressure injection system fuel. At the mouth of the fuel inlet 9 in the pump working chamber 7, an opening into the pump working chamber 7 inlet valve 10 is arranged.
- the pump working chamber 7 also has a fuel outlet 1 1 extending in the cylinder head 3, in which an outlet valve 12 is arranged, a connection to the high-pressure accumulator (not shown) of the fuel injection system.
- the pump element is associated with a plunger assembly 13, via which the pump piston 4 is supported on the cam of the drive shaft, not shown here.
- the plunger assembly 13 comprises a plunger body 14 having a substantially hollow cylindrical portion 15 and a roller receiving portion 16, in which a roller 17 is rotatably mounted on a pin 18 and arranged thereon socket 19.
- the plunger body is provided with an anti-rotation device, which will be described in detail in connection with FIGS. 2 and 3.
- the plunger body 14 is an outside, in the engine block or in the pump housing guided plunger body. On the outer diameter through holes are provided, which ensure further lubrication of the drive shaft with further holes in the inside.
- the pump piston 4 is taken over a retaining plate 21 during the downward movement. The retaining plate is held down by the spring 8.
- FIG. 2 is a partial sectional view of a plunger assembly 13 according to an embodiment.
- the roller 17 is arranged in the roller receiving portion 15, which is rotatably mounted on the pin 18 having the bushing 19.
- a locking ring 20 ensures the axial fixation of the roller 17.
- the rotation is pestle assembly side by a provided on the plunger body 14 projection 22, as Guide tongue 23 is formed realized.
- the guide tongue 23 is integrated directly on the plunger body 14 and projects from this downwards.
- FIG. 3 is a sectional view of a plunger assembly 13 according to an embodiment, the roller 17 on a drive shaft 24 and at one on the
- the guide tongue 23 is slightly above the track of the drive shaft 24 via.
- the rotation is effectively prevented via a positive connection of the guide tongue 23 to the groove 27.
- the guide tongue 23 may not start.
- a game 28 between the guide tongue 23 and the groove 27 is provided, which must be chosen so that the axial play and guide tolerances of the drive line are taken into account.
- the possible free torsional backlash of the plunger body 14 is thereby adjusted, as will be explained in connection with FIG. 4.
- Fig. 4 is a schematic representation for determining the minimum clearance 28 between the guide tongue 23 and the groove 27
- the free angular play ß results from trigonometric functions in dependence of the guide tab clearance s, the guide tongue width l b and the center distance /.
- the starting can be performed as in the embodiment shown in Fig. 4 on one side or on two sides.
- a contact surface 31 which is opposite to the running groove 27, convex or convex, in order to reduce wear and increase the robustness.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010063363A DE102010063363A1 (de) | 2010-12-17 | 2010-12-17 | Hochdruckpumpe |
PCT/EP2011/069115 WO2012079831A1 (de) | 2010-12-17 | 2011-10-31 | Hochdruckpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2652326A1 true EP2652326A1 (de) | 2013-10-23 |
EP2652326B1 EP2652326B1 (de) | 2014-12-24 |
Family
ID=44906099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11778860.4A Active EP2652326B1 (de) | 2010-12-17 | 2011-10-31 | Hochdruckpumpe |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2652326B1 (de) |
CN (1) | CN103261684B (de) |
DE (1) | DE102010063363A1 (de) |
ES (1) | ES2527666T3 (de) |
WO (1) | WO2012079831A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3176421A1 (de) * | 2015-12-03 | 2017-06-07 | Aktiebolaget SKF | Nockenstösselrollenvorrichtung mit verstärktem stösselkörper |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012218075A1 (de) | 2012-10-04 | 2014-04-10 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe |
DE102012218078A1 (de) | 2012-10-04 | 2014-04-10 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe, für eine Brennkraftmaschine |
DE102012218086A1 (de) | 2012-10-04 | 2014-04-10 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe, einer Brennkraftmaschine |
DE102012218083A1 (de) | 2012-10-04 | 2014-04-10 | Robert Bosch Gmbh | Gehäuse für eine Hochdruckpumpe |
DE102012222450A1 (de) | 2012-12-06 | 2014-06-12 | Robert Bosch Gmbh | Gehäuse für ein Hochdruckpumpenelement |
DE102013212237A1 (de) | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | Hochdruckpumpe |
EP2821646A1 (de) * | 2013-07-01 | 2015-01-07 | Delphi International Operations Luxembourg S.à r.l. | Hochdruckpumpe |
FR3015598B1 (fr) * | 2013-12-23 | 2016-12-23 | Skf Ab | Dispositif de rouleau suiveur de came |
DE102014218489A1 (de) * | 2014-09-15 | 2016-03-17 | Robert Bosch Gmbh | Kolbenpumpe |
DE102014223795A1 (de) | 2014-11-21 | 2016-05-25 | Robert Bosch Gmbh | Pumpe, insbesondere eine Kraftstoffhochdruckpumpe |
DE102014225794A1 (de) * | 2014-12-15 | 2016-06-16 | Robert Bosch Gmbh | Hochdruckpumpe sowie Verfahren zur Herstellung einer Hochdruckpumpe |
WO2016175975A1 (en) | 2015-04-28 | 2016-11-03 | Cummins Inc. | Pinless tappet in a common rail high pressure fuel pump |
DE102016203768B4 (de) * | 2015-11-12 | 2017-10-26 | Robert Bosch Gmbh | Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems, mit einem Montageverbund von Stößel-Baugruppe und Pumpenzylinderkopf, insbesondere durch eine Rastverbindung zwischen Federteller und Stößelkörper |
ITUA20164365A1 (it) * | 2016-06-14 | 2017-12-14 | Bosch Gmbh Robert | Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna |
JP7172752B2 (ja) | 2019-03-07 | 2022-11-16 | 株式会社デンソー | 燃料噴射ポンプ |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4152953A (en) * | 1977-12-15 | 1979-05-08 | General Motors Corporation | Roller cam follower with anti-rotation device |
DE102004048711B4 (de) * | 2004-10-06 | 2006-09-14 | Siemens Ag | Radialkolbenpumpe mit Rollenstößel |
DE102006048722A1 (de) * | 2006-10-16 | 2008-04-17 | Robert Bosch Gmbh | Kolbenpumpe, insbesondere Kraftstoffhochdruckpumpe, mit Rollenstößel |
DE102006052484A1 (de) * | 2006-11-07 | 2008-05-08 | Robert Bosch Gmbh | Nockenwellentrieb mit einer geometrischen Laufrollenstabilisierung |
DE102008007406A1 (de) * | 2008-02-04 | 2009-08-06 | Continental Automotive Gmbh | Hochdruckpumpe |
DE102008000710A1 (de) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102008015548A1 (de) * | 2008-03-25 | 2009-10-01 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102008001018A1 (de) | 2008-04-07 | 2009-10-08 | Robert Bosch Gmbh | Hochdruckkraftstoffpumpe als Steckpumpe |
DE102008040242A1 (de) * | 2008-07-08 | 2010-01-14 | Robert Bosch Gmbh | Einspritzpumpe |
DE102008041383A1 (de) | 2008-08-20 | 2010-02-25 | Robert Bosch Gmbh | Steckpumpe |
-
2010
- 2010-12-17 DE DE102010063363A patent/DE102010063363A1/de not_active Withdrawn
-
2011
- 2011-10-31 WO PCT/EP2011/069115 patent/WO2012079831A1/de active Application Filing
- 2011-10-31 CN CN201180060143.6A patent/CN103261684B/zh active Active
- 2011-10-31 ES ES11778860.4T patent/ES2527666T3/es active Active
- 2011-10-31 EP EP11778860.4A patent/EP2652326B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012079831A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3176421A1 (de) * | 2015-12-03 | 2017-06-07 | Aktiebolaget SKF | Nockenstösselrollenvorrichtung mit verstärktem stösselkörper |
US10030548B2 (en) | 2015-12-03 | 2018-07-24 | Aktiebolaget Skf | Cam follower roller device with reinforced tappet body |
Also Published As
Publication number | Publication date |
---|---|
ES2527666T3 (es) | 2015-01-28 |
CN103261684A (zh) | 2013-08-21 |
WO2012079831A1 (de) | 2012-06-21 |
EP2652326B1 (de) | 2014-12-24 |
CN103261684B (zh) | 2016-05-11 |
DE102010063363A1 (de) | 2012-06-21 |
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