EP2663772A1 - Hochdruckpumpe - Google Patents
HochdruckpumpeInfo
- Publication number
- EP2663772A1 EP2663772A1 EP11805064.0A EP11805064A EP2663772A1 EP 2663772 A1 EP2663772 A1 EP 2663772A1 EP 11805064 A EP11805064 A EP 11805064A EP 2663772 A1 EP2663772 A1 EP 2663772A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- section
- cam
- roller
- 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
Links
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
- 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
- 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
- F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
- F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
-
- 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
- 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
-
- 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
- F04B1/047—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 outer ends of the cylinders
-
- 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
- F04B53/18—Lubricating
Definitions
- the invention relates to a high-pressure pump, comprising a fluid-filled pump interior in a pump housing in which a pump camshaft is rotatably mounted with at least one cam, and at least one pump cylinder, in which a pump plunger translationally for conveying fluid by means of rolling on the cam track of the pump camshaft Roller of a roller tappet is movable, and being formed by the at least one circumferential cam and the roller tappet and changing volume in the pump interior via a flow cross section for a Fluidaustauch.
- Such a high-pressure pump is known from DE 10 2008 043 430 A1.
- the pump camshaft is arranged with axial clearance between two housing-side fixed stop surfaces.
- an axial spring element arranged in the form of a spring washer is arranged on the pump camshaft.
- Pump housing arranged a circumferential annular groove in the region of the interaction of the cam with the roller of a roller tappet.
- the spring washer or of this only partially filled space between the pump camshaft and the stop surfaces and by the circumferential annular groove of the cam in its orbital displacement displaced fluid with which the pump interior is filled, more or less uncontrolled and uninfluenced in the of the circulating cam and the roller tappet formed and constantly changing volume flow.
- the invention has for its object to optimize the compensating flow between the rotating cam and the roller tappet in the pump interior formed increasing and decreasing volume. Disclosure of the invention
- the flow cross-section is arranged extending in the region of the roller tappet in the pump housing adjacent to the pump interior.
- the compensation flow is limited to the area that forms the cause of the changing volume in front of and behind the cam cooperating with the pump housing by the interaction of the cams and the roller tappet or the roller.
- displaced fluid is selectively moved between the constantly changing volumes during the orbital movement of the at least one cam.
- a lack of lubrication of the roller is avoided in the roller shoe.
- the flow cross section is a flow cross section extending radially above the cam in the pump housing and at least one connecting cross section extending axially laterally of the cam in the pump housing.
- At least two pump cylinders are provided on the high-pressure pump and the flow cross-section and the at least one
- Connection cross-section connects the pump cylinder with each other by the shortest route. If, for example, two pump cylinders are arranged at a 90 ° angle, the flow cross-section and the connection cross-section extend over this angular range, in each case encompassing the region around the two pump cylinders. By means of this configuration, it is achieved that the compensating flow only has to be guided through the flow cross-section in the pump housing in a narrow area between two pump cylinders.
- a fluid deflection device is arranged in the flow cross section in the direction of rotation of the cam in the area behind the roller.
- This Fluidumlenkvoriques is - as will be explained below - arranged and designed so that a fluid flow is aligned in the direction of the inlet gap between the roller and the roller shoe.
- a roller which is guided in a roller shoe, and rolls on the cam track, thus converting the rotational rotational movement of the pump camshaft in a translational (up and down) movement of the roller tappet or actuated by this pump tappet , Due to the very high roller speed, the fluid acting as a lubricant medium is drawn into the gap between the roller and the roller shoe due to the drag effect over the inlet gap, thus creating a wear-free hydrodynamic sliding bearing, which transmits the high axial forces from the pump plunger to the pump camshaft.
- the fluid deflection device is a laterally adjacent to the cam in the pump housing incorporated Umlenknase.
- Umlenknase can be easily implemented, for example, in the cast production of the pump housing by appropriate design of the mold.
- the circulation nose extends along the flow cross-section and the connecting cross-section through it and, in a further embodiment, at least approximately parallel to the pump cylinder axis.
- a sealing gap is formed in the area outside the flow cross-section between the cams and the pump housing.
- This sealing gap is designed so that on the one hand the rotational movement of the pump camshaft is not hindered by fluid friction, on the other hand, the amount of fluid flowing through the sealing gap is low.
- the high-pressure pump is a high-pressure fuel pump of an injection system for an internal combustion engine.
- the invention is particularly useful when the fluid is fuel, useful and advantageous.
- FIG. 1 shows a cross section through a portion of a pump housing a
- High-pressure pump with two pump cylinders arranged at an angle of 90 °
- FIG. 2 shows an identical section as FIG. 1 with two other rotational positions of a pump camshaft
- FIG. 3 shows a longitudinal section through the high-pressure pump according to S1-S1 from FIG. 2 and
- FIG. 4 shows a sectional view of the high-pressure pump according to S2 from FIG. 2.
- the high pressure pump shown in the figures is designed for the injection system of an internal combustion engine.
- fuel is conveyed up to a pressure of about 3,000 bar in a high-pressure accumulator, from which the fuel is taken from, for example, solenoid valve controlled fuel injectors for injection into the associated combustion chambers of the internal combustion engine.
- the high-pressure pump shown in detail in FIG. 1 has a pump housing 1 with a pump interior 2.
- a pump pennockenwelle 3 in bearings 4a, 4b (Fig. 3) rotatably mounted.
- the pump camshaft 3 has two cams 5a, 5b in the exemplary embodiment.
- the cams 5a, 5b cooperate with rollers 6 of two roller tappets 7.
- the roller tappets 7 each have a roller shoe 8 into which a cylindrical recess 9 is machined. In this cylindrical recess 9 each have a roller 6 is inserted captive.
- 2 different volumes are formed in the pump interior, which constantly change by the interaction of the cams 5a, 5b with the roller tappets 7 in a rotary movement of the pump camshaft 1 and indeed increase and decrease.
- rotational movement of the Pumpenno- ckenwelle 3 in the rotational direction of the arrow from the dashed line position shown in the extended position shown reduces the volume V ! while the volumes V 3 and in particular V 4 increase.
- a compensating flow between these volumes V 1, V 3 and V 4 takes place via a flow cross-section 10, which is inserted radially above the cams 5 a, 5 b into the pump housing 1 and via a connecting cross-section 1 1, axially laterally of the cams 5 a, 5 b in FIG the pump housing 1
- Fig. 2 shows, in contrast to FIG. 1, the pump camshaft 3 in two other rotational positions, which result after a further rotation of the pump camshaft 1 by approximately 120 ° with respect to FIG. This reduces in the position change from the position shown in dashed lines in the extended position shown the pump camshaft 3, the volume V ! and V 3 , while the volume V 4 increases here as well.
- the longitudinal section along S Si according to FIG. 2 shown in FIG. 3 shows the arrangement and configuration of the flow cross-section 10 and of the connecting cross section 1 1 arranged in the pump housing 1 on both sides of the cams 5 a, 5 b.
- the flow connection of the volumes V 1, V 3 and V 4 takes place via the flow cross-section 10 and the two connecting cross-sections 1 1, such that during the rotary movement of the pump camshaft 3, a compensating flow between the volumes V 1,
- V 3 and V 4 takes place.
- a sealing gap 12 formed between the pump camshaft 3 or the cams 5 a, 5 b and the pump housing 1 .
- no appreciable flow compensation takes place.
- FIG. 4 shows a sectional view S 2 according to FIG. 2. It is shown that a respective deflection nose 13 projects into the flow cross-section 10 or the connecting cross-section 1 1 arranged on both sides of the pump housing 1. Arranged are the two Umlenknasen 13 each just behind the cylindrical recess 9 and the roller 6 and are formed by the pump housing 1. The two Umlenknasen 13 cause the flow deflection shown by the arrows of the compensating flow of the fluid of the volume V ! into the volume V 3 . As a result of this flow reversal, the fluid is specifically guided in front of the inlet gap Ei of the roller 6. As a result of the rotational movement of the roller 6 during the rolling process on the cam track of the pump camshaft 3, fluid is deliberately built up to build up a wear-free hydrostatic sliding bearing between the roller 6 and the cylindrical recess 9.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110002701 DE102011002701A1 (de) | 2011-01-14 | 2011-01-14 | Hochdruckpumpe |
| PCT/EP2011/074294 WO2012095270A1 (de) | 2011-01-14 | 2011-12-30 | Hochdruckpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2663772A1 true EP2663772A1 (de) | 2013-11-20 |
| EP2663772B1 EP2663772B1 (de) | 2014-11-12 |
Family
ID=45446052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11805064.0A Not-in-force EP2663772B1 (de) | 2011-01-14 | 2011-12-30 | Hochdruckpumpe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2663772B1 (de) |
| CN (1) | CN103299072B (de) |
| DE (1) | DE102011002701A1 (de) |
| WO (1) | WO2012095270A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047838B (zh) * | 2014-06-13 | 2016-08-24 | 江苏盈科汽车空调有限公司 | 一种变排量空调压缩机 |
| US9835123B2 (en) | 2015-01-13 | 2017-12-05 | Roller Bearing Company Of America, Inc. | Roller for a fuel pump actuator |
| CN104929885A (zh) * | 2015-07-07 | 2015-09-23 | 中国航天科技集团公司烽火机械厂 | 一种径向柱塞泵 |
| KR101745118B1 (ko) * | 2015-07-29 | 2017-06-08 | 현대자동차 유럽기술연구소 | 고압펌프 |
| CN116324156A (zh) | 2020-09-24 | 2023-06-23 | 康明斯有限公司 | 带有用于凸角间隙的泄压切口的泵壳体 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004048711B4 (de) * | 2004-10-06 | 2006-09-14 | Siemens Ag | Radialkolbenpumpe mit Rollenstößel |
| JP2008163816A (ja) * | 2006-12-27 | 2008-07-17 | Denso Corp | カム機構搭載装置 |
| DE102007060772A1 (de) * | 2007-12-17 | 2009-06-18 | Robert Bosch Gmbh | Pumpe, insbesondere Kraftstoffhochdruckpumpe |
| DE102008043430A1 (de) | 2008-11-04 | 2010-05-06 | Robert Bosch Gmbh | Kolbenpumpe mit optiertem axialem Anlaufverhalten einer Nockenwelle |
-
2011
- 2011-01-14 DE DE201110002701 patent/DE102011002701A1/de not_active Withdrawn
- 2011-12-30 EP EP11805064.0A patent/EP2663772B1/de not_active Not-in-force
- 2011-12-30 CN CN201180064747.8A patent/CN103299072B/zh active Active
- 2011-12-30 WO PCT/EP2011/074294 patent/WO2012095270A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012095270A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2663772B1 (de) | 2014-11-12 |
| DE102011002701A1 (de) | 2012-07-19 |
| CN103299072A (zh) | 2013-09-11 |
| WO2012095270A1 (de) | 2012-07-19 |
| CN103299072B (zh) | 2016-03-30 |
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