EP3194770A1 - Kolbenpumpe - Google Patents
KolbenpumpeInfo
- Publication number
- EP3194770A1 EP3194770A1 EP15736837.4A EP15736837A EP3194770A1 EP 3194770 A1 EP3194770 A1 EP 3194770A1 EP 15736837 A EP15736837 A EP 15736837A EP 3194770 A1 EP3194770 A1 EP 3194770A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing eye
- roller
- bolt
- piston pump
- bearing
- 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 description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000035882 stress Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- 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
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
-
- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/02—Elasticity
Definitions
- the present invention relates to a piston pump with a roller tappet.
- Such a piston pump is known from the published patent application DE 10 201 1 076 022 A1.
- the known piston pump comprises a roller tappet and a pump piston operatively connected to the roller tappet, the roller tappet having a roller shoe, a roller and a bolt.
- the roller shoe a first bearing eye and a second bearing eye are formed, wherein the bolt is mounted in the first bearing eye and the second bearing eye and wherein the roller is rotatably mounted on the bolt.
- roller tappet of the known piston pump is exposed to thermal stresses at temperature loads, resulting in a reduction of
- the piston pump according to the invention has a roller tappet, which is robust against temperature loads. The life and efficiency of the piston pump are thus not reduced by the temperature loads, and a smoother running of the piston pump is achieved.
- the piston pump has a roller tappet and one with the
- roller tappet operatively connected pump piston on.
- the roller tappet comprises a roller shoe, a roller and a bolt.
- a first bearing eye and a second bearing eye are formed, wherein the bolt is mounted in the first bearing eye and in the second bearing eye.
- the roller is rotatably mounted on the bolt.
- the bolt is elastically mounted in the first bearing eye as in the second bearing eye.
- the bolt and the roller shoe may differ
- roller shoe is arranged in a plunger housing. This can occur in the conversion of the rotational movement of the roller in a translational movement of the pump piston
- roller tappet can thus align itself within the plunger housing; due to storage conditions occurring stresses are prevented.
- the connection between the first bearing eye and bolt is less rigid than the connection between the second bearing eye and bolt. Furthermore, this also makes the first bearing eye even less stiff than the second bearing eye. The elasticity in the connection between the second bearing eye and bolt can thus possibly different
- Recess may additionally serve the integration of other functions, such as the lubricant supply to the first bearing eye.
- the recess is a reduction in the wall thickness of the first bearing eye. This will increase the stiffness of the first
- the first bearing eye is elastically expandable. The recess thereby leads to a comparatively strong increase in diameter of the first bearing eye, as soon as a contact pressure to the bolt is present.
- the recess is a continuous slot, so that the first bearing eye two unilaterally separated
- the bolt is in the first
- the bolt can thus perform relative displacements to the roller shoe during operation of the piston pump.
- a further recess is formed in the second bearing eye.
- This is also the second bearing eye formed comparatively soft and both in the first bearing eye and in the second bearing eye different length expansions of
- the further recess is a reduction of
- the bolt is clamped in the first bearing eye and in the second bearing eye.
- a comparatively low contact force to the bolt is present both in the first bearing eye and in the second bearing eye.
- the bolt can perform relative displacements to the roller shoe both in the first bearing eye and in the second bearing eye and compensate accordingly different thermal expansions of roller shoe and bolt.
- roller tappet not only increases the life of the piston pump, but also increases the life of the entire fuel injection system.
- FIG. 1 shows a piston pump with a roller tappet.
- FIG. 2 shows the roller tappet from FIG. 1 in a side view.
- 3 shows a roller tappet in a further embodiment.
- Description Fig.1 shows a piston pump 1 with a pump housing 20.
- the roller tappet 2 comprises a tappet body 15, a roller shoe 3, a roller 4 and a bolt 5.
- the roller shoe 3 is arranged in the tappet body 15; in alternative
- the plunger body 15 and the roller shoe 3 may also be made in one piece.
- the bolt 5 is mounted in the roller shoe 3.
- a first bearing eye 6 with a first width b6 and a second bearing eye 7 with a second width b7 are formed in the roller shoe 3, in which the bolt 5 is mounted or pressed.
- the roller 4 is rotatable on the
- a formed on the camshaft 21 cam 22 cooperates with the roller 4, so that the roller 4 rolls on a rotation of the camshaft 21 on the cam 22.
- On the opposite side of the cam 22 is the
- Roller shoe 3 with the pump piston 10 operatively connected.
- a spring 25 biases the pump piston 10 with the interposition of a washer 26 against the roller shoe 3.
- FIG. 2 shows the roller tappet 2 from FIG. 1 in a side view.
- Lagerauges 6 in the form of a continuous slot, so that the first
- Bearing eye 6 is divided into a first bearing leg 6a and a second bearing leg 6b, wherein the first bearing leg 6a is separated from the second bearing leg 6b on one side.
- An inner surface 6c of the first bearing eye 6, in which the pin 5 is clamped or pressed, is thus relatively highly elastic due to the recess 8.
- 3 shows the roller tappet 2 in a further embodiment. in the
- the recess 8 in the first bearing eye 6 is not formed continuously over the entire wall thickness of the first bearing eye 8, but merely leads to a local reduction of the wall thickness of the first bearing eye 6 in this area.
- the inner surface 6c is designed to be elastically expandable in this embodiment, that is, in the region of the recess 8, the first bearing eye 6 is made comparatively soft.
- the operation of the piston pump 1 is as follows:
- the camshaft 21 is connected by a drive unit, not shown, for example, from one connected to an internal combustion engine
- Timing belt driven.
- the cam 22 performs a rotational movement and describes a cam track.
- the roller tappet 2 which is operatively connected to the cam 22 via the roller 4, performs a translatory upward and downward movement in the pump housing 20, the direction of movement being perpendicular to the axis of the camshaft 21.
- Compression chamber For example, so can the fuel of a
- Fuel injection system in the piston pump 1 are brought under high pressure.
- connection between the bolt 5 and the first bearing eye 6 is now made more elastic or softer than the connection between the bolt 5 and the second bearing eye 7.
- the bolt 5 can perform a relative movement in its axial direction to the first bearing eye 6 during thermal loading , Thermal stresses in the bolt 5 and in the roller shoe 3 are thereby reduced or even avoided.
- the different design of the stiffness of the connections in the two bearing eyes 6, 7 can be carried out, for example, as follows:
- the frictional force of the press fit between the pin 5 and the first bearing eye 6 is less than the frictional force of the press fit between the pin 5 and the second bearing eye 7, for example by the first width b6 being smaller than the second width b7.
- the first bearing eye 6 is made softer than the second bearing eye 7, for example through the recess 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014218489.4A DE102014218489A1 (de) | 2014-09-15 | 2014-09-15 | Kolbenpumpe |
PCT/EP2015/066068 WO2016041655A1 (de) | 2014-09-15 | 2015-07-14 | Kolbenpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3194770A1 true EP3194770A1 (de) | 2017-07-26 |
EP3194770B1 EP3194770B1 (de) | 2021-09-08 |
Family
ID=53546223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15736837.4A Active EP3194770B1 (de) | 2014-09-15 | 2015-07-14 | Kolbenpumpe |
Country Status (6)
Country | Link |
---|---|
US (1) | US10100796B2 (de) |
EP (1) | EP3194770B1 (de) |
JP (1) | JP6467501B2 (de) |
CN (1) | CN106715886A (de) |
DE (1) | DE102014218489A1 (de) |
WO (1) | WO2016041655A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014220937B4 (de) | 2014-10-15 | 2016-06-30 | Continental Automotive Gmbh | Antriebsvorrichtung zum Antreiben einer Kraftstoffhochdruckpumpe sowie Kraftstoffhochdruckpumpe |
DE102014220839B4 (de) * | 2014-10-15 | 2016-07-21 | Continental Automotive Gmbh | Hochdruckpumpe für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine |
KR102417607B1 (ko) * | 2020-11-19 | 2022-07-06 | 주식회사 현대케피코 | 고압공급펌프의 롤러 비틀림 방지 구조 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK147186C (da) * | 1981-05-06 | 1984-10-29 | B & W Diesel As | Drivmekanisme for en braendselspumpe til en omstyrbar totaktsmotor |
DE4225363A1 (de) | 1992-07-31 | 1994-02-03 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe für Brennkraftmaschinen |
DE4227854B4 (de) | 1992-08-22 | 2005-12-15 | Robert Bosch Gmbh | Kraftstoffeinspritzpumpe für Brennkraftmaschinen |
JPH1054321A (ja) * | 1996-08-08 | 1998-02-24 | Toyota Motor Corp | 燃料噴射ポンプのローラブッシュ |
DE102007006320A1 (de) * | 2007-02-08 | 2008-08-14 | Schaeffler Kg | Mechanischer Rollenstößel für einen Verbrennungsmotor |
JP4788705B2 (ja) | 2007-11-14 | 2011-10-05 | トヨタ自動車株式会社 | リフタのかしめ構造 |
DE102010022318B4 (de) * | 2010-06-01 | 2017-09-07 | Schaeffler Technologies AG & Co. KG | Rollenstößel |
DE102010030498A1 (de) * | 2010-06-24 | 2011-12-29 | Robert Bosch Gmbh | Pumpe, insbesondere Kraftstoffhochdruckpumpe |
DE102010063363A1 (de) * | 2010-12-17 | 2012-06-21 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102011003678A1 (de) | 2011-02-07 | 2012-08-09 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102011076022A1 (de) | 2011-05-18 | 2012-11-22 | Robert Bosch Gmbh | Rollenstößel, insbesondere einer Kolbenpumpe |
-
2014
- 2014-09-15 DE DE102014218489.4A patent/DE102014218489A1/de not_active Withdrawn
-
2015
- 2015-07-14 WO PCT/EP2015/066068 patent/WO2016041655A1/de active Application Filing
- 2015-07-14 JP JP2017512364A patent/JP6467501B2/ja not_active Expired - Fee Related
- 2015-07-14 EP EP15736837.4A patent/EP3194770B1/de active Active
- 2015-07-14 US US15/511,295 patent/US10100796B2/en not_active Expired - Fee Related
- 2015-07-14 CN CN201580049363.7A patent/CN106715886A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN106715886A (zh) | 2017-05-24 |
WO2016041655A1 (de) | 2016-03-24 |
EP3194770B1 (de) | 2021-09-08 |
JP2017527734A (ja) | 2017-09-21 |
DE102014218489A1 (de) | 2016-03-17 |
JP6467501B2 (ja) | 2019-02-13 |
US10100796B2 (en) | 2018-10-16 |
US20170260947A1 (en) | 2017-09-14 |
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