WO2016058878A1 - Hochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine - Google Patents
Hochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine Download PDFInfo
- Publication number
- WO2016058878A1 WO2016058878A1 PCT/EP2015/073114 EP2015073114W WO2016058878A1 WO 2016058878 A1 WO2016058878 A1 WO 2016058878A1 EP 2015073114 W EP2015073114 W EP 2015073114W WO 2016058878 A1 WO2016058878 A1 WO 2016058878A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tappet
- roller
- mass
- peripheral wall
- pressure pump
- Prior art date
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
- F02M59/02—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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- 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
- 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
Definitions
- the invention relates to a high pressure pump for a fuel injection ⁇ system of an internal combustion engine.
- High-pressure pump in fuel injection systems are used, a fuel with a high pressure to beauf ⁇ beat, the pressure, for example, in gasoline internal combustion engines in the range of 250 - is 2500 bar - 400 bar and diesel internal combustion engines in the range of 2000 bar.
- the high-pressure pump is typically designed as a piston pump, wherein the piston is driven by a roller tappet.
- the roller tappet has a roller that comes into contact with a cam surface of a cam of a camshaft that is driven by the internal combustion engine.
- a rotational movement of the camshaft is translated via the roller tappet in a translational movement and transmitted to a piston of the high-pressure pump.
- the translation of the rotational movement of the camshaft in a translational movement not only axial forces but also lateral forces are transmitted to the Rol ⁇ lenst Jardinel by the cam surface.
- the entry of lateral forces can lead in the worst case to a tilting of the roller tappet in a tappet guide in the high-pressure pump. So far, it has been attempted to better control this tilting by a corresponding ratio of a roller plunger length L has been maintained to a roller tappet outer diameter D in the range of L / D> 1.
- roller tappet axis to the axis of the camshaft is displaced towards at ⁇ ordered so that a contact angle between the roller follower and cam surface can be reduced to reduce the resulting side forces.
- the geometry and also the center of gravity of the roller tappet were carried out in such a way that as far as possible no offset to the roller tappet axis arises which is arranged offset to the axis of the camshaft.
- the object of the invention is therefore to provide an alternative arrangement which allows control over the tilting of the roller tappet in its roller tappet guide.
- roller tappet guide bore In order to lubricate the roller tappet advantageous, a game of about 0.06 mm to 0.1 mm is provided in the roller tappet guide bore.
- a ratio of a roller tappet length L to a roller push-out diameter DL / D is> 1.
- a roller tappet axis is still perpendicular to the axis of the camshaft.
- an anti-rotation is provided, for example, formed by a projection which is arranged either on the tappet guide bore or on the outer region of the tappet shirt, and which is in engagement with a recess in the tappet shirt or tappet guide bore.
- the tappet skirt can be preferably rotationally symmetrically ⁇ forms, ie it can advantageously be formed exclusively circular in cross section perpendicular to a longitudinal extension of the ram the shirt.
- the plane of symmetry extends on a circle radius through a circle center of the circular shaped tappet shirt.
- the plunger shirt it is also possible for the plunger shirt to be cuboidal or square in cross-section perpendicular to its longitudinal extent.
- the plane of symmetry runs on a side bisector of the sides of the cuboid or of the square. In this case there are correspondingly two planes of symmetry through the plunger shirt.
- the plunger shirt on a cross member for contacting the piston and a peripheral wall for receiving the role, wherein the total mass of the plunger shirt is arranged asymmetrically around the sym ⁇ metry plane on the cross member and / or the peripheral wall.
- the total mass is thus advantageously formed by a combination of the mass of the traverse and the peripheral wall.
- both the crosshead and the peripheral wall may be formed with an unbalanced mass distribution is advantageous.
- several degrees of freedom are advantageously available in the production of the tappet shirt,
- the uneven mass distribution of the tappet shirt made ⁇ union.
- the total mass of the ram shirt is formed by the sum of a base mass of a symmetrically to the Symmet ⁇ rieebene formed plunger shirt and an unbalanced mass which is mounted asymmetrically to the plane of symmetry at a directed towards the roller inner region of the tappet shirt.
- the tappet shirt can be produced particularly simply by arranging an additional mass in the form of the unbalanced mass on a tappet shirt which is generated as usual and symmetrical with respect to its geometry and its center of mass, and thus advantageously off-center, ie asymmetrically with respect to the plane of symmetry of the tappet shirt to achieve advantageous mass imbalance of the tappet shirt.
- the imbalance mass is particularly advantageously arranged in a contact region of the crossbeam and the peripheral wall, since the largest space for attaching an imbalance mass is advantageously available due to the geometry of the tappet skirt.
- the imbalance mass is arranged contact-free to the roller in the plunger shirt, so as to prevent advantageous that the imbalance mass obstructs the role in their mobility.
- the peripheral wall of the tappet shirt has a length parallel to the tappet guide bore starting from a contact region with the cross member up to an open end opposite the contact region. It is particularly preferred if the imbalance mass extends from the contact region, preferably over half the length of the peripheral wall. It is even better if the imbalance mass extends over a third of the length or in particular over a quarter of the length. As a result, preferably a disturbing contact with the roller can be avoided.
- significantly greater forces act on the tappet guide bore in the area of the open end of the tappet shirt than in a region of the roller tappet near the piston, ie in a contact region of the traverse and the peripheral wall. To counteract this, it is advantageous if the imbalance mass is arranged closer to the contact area than at the open end. As a result, a better distribution of forces is achieved, which advantageously counteracts the tilting of the roller tappet in the tappet guide bore.
- the imbalance mass is triangular in longitudinal section parallel to the tappet guide bore.
- a first triangular leg is formed by a partial region of the traverse and a second triangular limb is formed by a partial region of the circumferential wall.
- a triangular design of the unbalanced mass, wherein the triangle divides advantageous side areas with existing elements of the tappet ⁇ hemdes as the Traverse or the peripheral wall, is particularly favorable to manufacture, since it can be easily produced.
- the imbalance mass may be unfavorable because, for example, an excessively high torque M mass would be generated, it may be advantageous to have only one projection either on the traverse or on the peripheral wall or on the traverse and Peripheral wall is provided.
- pins can be arranged on the traverse or on the peripheral wall.
- the unbalanced mass is 10% to 100% of the Ba ⁇ sismasse preferably, in particular 20% to 50% of the base mass.
- the base mass of the tappet shirt is about 100 g, it is particularly preferred if the imbalance mass has a mass of about 20 g to 50 g.
- the imbalance mass can therefore have the same mass as the base mass of a symmetrical to the plane of symmetry formed Tappet shirt, and thereby advantageously greatly shift the balance of forces acting on the open end forces to acting on the contact area forces.
- the imbalance mass is in a range of 20% to 50% of the base mass, since so the torque M Ma se se particularly advantageous counteracts the original torque of the roller tappet in the tappet guide bore.
- the unbalanced mass is advantageously attached ⁇ belongs to the tappet skirt, that a center of gravity of the unbalanced mass is about 10 mm ⁇ be abstandet of the plane of symmetry of the plunger shirt.
- the environmental peripheral wall can also have at least one asymmetrical to the Symmet ⁇ rieebene located recess. This is another way to arrange the total mass of the plunger shirt asymmetrically about the plane of symmetry, which can be made particularly simple.
- the recess from the open end of the peripheral wall extends, starting about half the length of the order ⁇ peripheral wall, more preferably about one third of the length and in particular on a quarter of the length. This has the same advantageous effect as in the advantageous arrangement of the unbalanced mass in the opposite end of the open end contact area of Traverse and peripheral wall.
- the peripheral wall may also be formed with a cavity, wherein the cavity is preferably arranged in a third of the peripheral wall adjacent to the open end.
- roller tappet and the tappet skirt in particular from at least two different materials under ⁇ , which have a different density. These materials may then preferably distributed asymmetrically distributed on the cross member and / or the peripheral wall.
- Figure 1 is a perspective view of a longitudinal section of a high-pressure pump with a roller tappet, wherein a roller of the roller tappet runs in a roller shoe.
- FIG. 2 is a longitudinal sectional view of a high-pressure pump with a roller tappet without roller shoe
- FIG. 3 is a perspective view of a plunger shirt of the roller tappet of FIG. 1, which is circular in cross-section perpendicular to a longitudinal extent.
- FIG. 4 is a perspective view of a plunger shirt formed in a cuboid in cross-section perpendicular to a longitudinal extent;
- Fig. 5 is a schematic longitudinal sectional view of a
- Fig. 6 is a schematic longitudinal sectional view of a
- Fig. 7 is a schematic longitudinal sectional view of a
- Fig. 8 is a schematic longitudinal sectional view of a
- FIG. 11 is a schematic longitudinal sectional view of a
- FIG. 1 and FIG. 2 each show a longitudinal sectional illustration of a high-pressure pump 10 in a fuel injection system of an internal combustion engine 14.
- the high pressure pump 10 is designed as a piston pump 16 and has a guided in a piston guide 18 of a pump housing 20 piston 22 during operation, executes a translational movement and thereby a sawn-sensitive in a pressure chamber 24 fuel compacts 25 and thus be ⁇ alsschlagt with pressure
- the pump housing 20 is constructed in the present embodiment of two sub-areas, namely a cylinder portion 20 a and a lower housing portion 20 b.
- the piston guide 18 is preferably arranged in the cylinder region 20a.
- a roller tappet 30 is provided, which has a surface 32 of the camshaft 26 contacting roller 34 and a standing in contact with the piston 22 plunger shirt 36.
- roller 34 runs in an additional roller shoe 38 which is in the plunger shirt 36th is arranged, while in the high-pressure pump 10, which is shown in Fig. 2, no additional roller shoe 38 is provided.
- the tappet shirt 36 has a cross member 40 which contacts the piston 22, and a peripheral wall 42 in which the roller 34 is received, and for guiding the entire roller tappet 30 in a tappet guide bore 44 of the pump housing 20 in the lower housing portion 20b, in Fig. 2 is not shown, is used.
- the plunger shirt 36 is arranged on an outer region 46 symmetrically about a plane of symmetry 48.
- FIG. 3 shows a plunger shirt 36, which is circular in cross-section perpendicular to its longitudinal extent 50.
- the plane of symmetry 48 runs on a circle radius 52 through a circle center 54.
- the plunger shirt 36 may be formed parallelepiped in cross-section perpendicular to its longitudinal extent 50, as shown in Fig. 4.
- the tappet skirt 36 on two planes of symmetry 48, each extending on a Be ⁇ tenraumierenden 56th
- Fig. 5 shows schematically an arrangement of cam 28, roller tappet 30 and piston 22, wherein the plunger shirt 36 is formed symmetrically in both geometry and in total mass about the plane of symmetry 48.
- both forces in the axial direction F ax i a i and in the lateral direction F se i t ii Ch in the roller tappet by the surface 32 30 ⁇ passes, finally, via the piston 22 to transmit the force to the fuel 25 in the form of pressure.
- the lateral forces F S eitiich be received by the lifter guide hole 44, and are shown in Fig. 5 with Fi and designated F2.
- Fi denotes a lateral force which acts in the region of an open end 58 of the peripheral wall 42 of the tappet shirt 36.
- F2 denotes a lateral force which acts in a contact region 60 of the traverse 40 with the peripheral wall 42.
- a geometry of 62 and a total mass of the ram 64 shirt 36 is arranged symmetrically about the Sym ⁇ metrieebene 48th
- a roller tappet axis 66 is arranged so that it extends perpendicularly through an axis 68 of the camshaft 26 so as to reduce the contact angle between the cam 28 and roller 34 and thus reduce Sei ⁇ ten book.
- an unbalanced mass can for this purpose, as schematically Darge ⁇ represents in Fig. 6, may be provided 70, which asymmetrically to the plane of symmetry 48 in an inner region 72 of the STOE Blend shirt 36 is arranged and together with a base mass 74 with respect to the symmetry plane 48 symmetrically ge ⁇ formed plunger shirt 36, the total mass 64 of the plunger shirt 36 forms.
- the unbalanced mass 70 brings an acceleration force F Ma sse with it that results in a torque M Ma sse, which opposes the by the uneven distribution of forces Fi and F2 resulting tilting moment of the roller tappet 30th
- the tilting moment can be influenced and reduced, and edge loads on the roller tappet 30 due to unequal distribution Fi and F2 can be reduced.
- the time of tilting, so the sudden and unilateral release of the roller tappet 30 of the tappet guide bore 44 can be changed so that the tilting does not adversely affect the kinematics.
- FIG. 6 shows a first embodiment of a schematic longitudinal sectional illustration of the roller tappet 30, which shows how the total mass 64 can be distributed asymmetrically around the plane of symmetry 48, namely by providing an imbalance mass 70 in the contact region 60 of traverse 40 and
- the unbalanced mass 70 on the plunger shirt 36 can be made very easily, it being only advantageous to ensure that the imbalance mass is arranged without contact to the roller 34 in the plunger shirt 36.
- the unbalanced mass 70 can be triangular, for example in longitudinal section to the parallel to the tappet guide bore 44, as shown in Fig. 6. Particularly advantageous is a first triangular leg 76 through a portion 78 of the Traverse 40 formed, and a second triangle legs 80 through a portion 82 of the peripheral wall 42nd
- the unbalanced mass 70 is located in an upper region of the tappet shirt 36, d. H. at a peripheral wall 42, which has a certain length 84 starting from the contact region 60 to the open end 58, starting from the contact region 60 over half of the length 84 and over one third of the length 84 and over a quarter of the length 84 extends.
- the torque M Ma s se is influenced by F mass also from the actual mass of the unbalanced mass 70th It has proven to be advantageous that the unbalanced mass 70 makes up 10% to 100% of the base mass 74. It is particularly advantageous if the imbalance mass moves in a range of 20% to 50% of the base mass 74.
- the triangular shape shown in FIG. 1 As an alternative to the triangular shape shown in FIG. 1
- Imbalance mass 70 may also, as shown in the longitudinal sectional view in Fig. 7, projections 88 on the cross member 40 and / or the peripheral wall 42 may be provided, which also, as well as the triangular unbalanced mass 70, advantageously from the contact portion 60 over half the length 84 and a third of the length 84 and a quarter of the length 84 of the peripheral wall 42 extend.
- Fig. 8 and Fig. 9 represent schematic longitudinal sectional views of alternative embodiments of the tappet shirt, in which not an additional imbalance mass 70 are provided in the inner region 72 of the peripheral wall 42, but in which an area of the Circumferential wall 42 has one or more recesses 90 and a cavity 92.
- the mass of the peripheral wall 42 in the area having the recess 90 and the cavity 92 is less than in other areas of the peripheral wall 42 and there is a total of an asymmetrically distributed to the plane of symmetry 48 Ge ⁇ felmasse 64 of the plunger shirt 36th a further, in Fig. alternative shown in longitudinal section 10, the provision of different materials, a first material 94 having a first density and a second material 96 a second density which is un ⁇ differently to the first density.
- the plunger shirt 36 is made from the two materials 94, 96, wherein the materials 94, 96 are arranged asymmetrically about the plane of symmetry 48, so that a total of asymmetrically distributed to the plane of symmetry 48 total mass 64 of the plunger shirt 36 results.
- FIG. 11 shows, in a longitudinal section, by way of example for the triangular unbalanced mass 70 on the inner region 72 of the plunger 36, an anti-rotation device 98, which, however, can also be used in all other embodiments.
- the anti-twist device may be formed as a pin 100 which is disposed either on the tappet guide bore 44 or the tappet shirt 36 and in a recess 100 on the adjacent element - tappet guide bore 44 or roller tappet 30 - engages, so as to prevent the Roller tappet 30 rotates about its roller ⁇ tsammlungelachse 66.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016557651A JP6355751B2 (ja) | 2014-10-15 | 2015-10-07 | 内燃機関の燃料噴射システムのための高圧ポンプ |
KR1020167025925A KR101907766B1 (ko) | 2014-10-15 | 2015-10-07 | 내연 엔진의 연료 분사 시스템을 위한 고압 펌프 |
US15/119,165 US10174731B2 (en) | 2014-10-15 | 2015-10-07 | High pressure pump for a fuel injection system of an internal combustion engine |
CN201580017959.9A CN106460756A (zh) | 2014-10-15 | 2015-10-07 | 用于内燃机的燃料喷射系统的高压泵 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014220839.4A DE102014220839B4 (de) | 2014-10-15 | 2014-10-15 | Hochdruckpumpe für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine |
DE102014220839.4 | 2014-10-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016058878A1 true WO2016058878A1 (de) | 2016-04-21 |
Family
ID=54288784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/073114 WO2016058878A1 (de) | 2014-10-15 | 2015-10-07 | Hochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US10174731B2 (de) |
JP (1) | JP6355751B2 (de) |
KR (1) | KR101907766B1 (de) |
CN (1) | CN106460756A (de) |
DE (1) | DE102014220839B4 (de) |
WO (1) | WO2016058878A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10174731B2 (en) | 2014-10-15 | 2019-01-08 | Continental Automotive Gmbh | High pressure pump for a fuel injection system of an internal combustion engine |
US10208725B2 (en) | 2014-10-15 | 2019-02-19 | Continental Automotive Gmbh | High pressure fuel pump and associated drive device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190309658A1 (en) * | 2018-04-04 | 2019-10-10 | GM Global Technology Operations LLC | Cam follower assembly |
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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 |
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2014
- 2014-10-15 DE DE102014220839.4A patent/DE102014220839B4/de active Active
-
2015
- 2015-10-07 CN CN201580017959.9A patent/CN106460756A/zh active Pending
- 2015-10-07 JP JP2016557651A patent/JP6355751B2/ja active Active
- 2015-10-07 WO PCT/EP2015/073114 patent/WO2016058878A1/de active Application Filing
- 2015-10-07 KR KR1020167025925A patent/KR101907766B1/ko active IP Right Grant
- 2015-10-07 US US15/119,165 patent/US10174731B2/en active Active
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DE102010026360A1 (de) * | 2010-07-07 | 2012-01-12 | Schaeffler Technologies Gmbh & Co. Kg | Stössel |
WO2012082768A1 (en) * | 2010-12-13 | 2012-06-21 | Eaton Corporation | Pump actuator anti-rotation device |
WO2013119214A1 (en) * | 2012-02-08 | 2013-08-15 | Koyo Bearings Usa Llc | Follower mechanism |
EP2677124A1 (de) * | 2012-06-20 | 2013-12-25 | Otics Corporation | Rollenstössel für Verbrennungsmotor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10174731B2 (en) | 2014-10-15 | 2019-01-08 | Continental Automotive Gmbh | High pressure pump for a fuel injection system of an internal combustion engine |
US10208725B2 (en) | 2014-10-15 | 2019-02-19 | Continental Automotive Gmbh | High pressure fuel pump and associated drive device |
Also Published As
Publication number | Publication date |
---|---|
JP2017512936A (ja) | 2017-05-25 |
US20170211534A1 (en) | 2017-07-27 |
KR20160119238A (ko) | 2016-10-12 |
US10174731B2 (en) | 2019-01-08 |
DE102014220839B4 (de) | 2016-07-21 |
KR101907766B1 (ko) | 2018-12-07 |
CN106460756A (zh) | 2017-02-22 |
DE102014220839A1 (de) | 2016-04-21 |
JP6355751B2 (ja) | 2018-07-11 |
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