EP2649313A1 - Pumpe, insbesondere kraftstoffhochdruckpumpe - Google Patents
Pumpe, insbesondere kraftstoffhochdruckpumpeInfo
- Publication number
- EP2649313A1 EP2649313A1 EP11794104.7A EP11794104A EP2649313A1 EP 2649313 A1 EP2649313 A1 EP 2649313A1 EP 11794104 A EP11794104 A EP 11794104A EP 2649313 A1 EP2649313 A1 EP 2649313A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- drive shaft
- medium
- space
- cam
- 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
- 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
Definitions
- the invention is based on a pump, in particular
- Such a pump in the form of a high-pressure fuel pump is known from DE 10 2004 004 705 AI.
- This pump has at least one
- Pump element having a driven by a rotating drive shaft at least indirectly in a stroke pump piston, wherein the drive shaft has at least one cam.
- Pump piston and the cam is a roller tappet provided with a roller running on the cam.
- the pump has a pump housing, in which the drive shaft is arranged, wherein the interior of the pump housing via a feed liquid medium is supplied and discharged via a discharge liquid medium. As a medium, the interior of the pump housing via a feed liquid medium is supplied and discharged via a discharge liquid medium. As a medium, the interior of the pump housing via a feed liquid medium is supplied and discharged via a discharge liquid medium. As a medium, the interior of the
- Pump housing the fuel supplied, which is to be pumped by the pump.
- fuel lubrication and / or cooling of the drive range of the pump is achieved, but there is no targeted supply of medium to the drive area but the
- Medium is distributed throughout the interior of the pump housing. Since no targeted mixing of the medium takes place inside the pump housing, the medium can have a high temperature around the drive region. At high load of the pump, however, the lubrication and / or cooling of the drive portion, in particular the contact area between the roller and the cam and the roller tappet may not be sufficient. This can lead to wear and eventually to failure of the pump. Disclosure of the invention
- the pump according to the invention with the features of claim 1 has the advantage that in the by the cam and the
- Training according to claim 2 a particularly good mixing of the medium is achieved, since this can not get directly from the feed to the discharge but must flow over a large part of the circumference of the cam.
- the embodiment according to claim 3 allows a favorable inflow and / or outflow of the medium into or out of the room.
- the development according to claim 4 a good lubrication and / or cooling of the plunger is made possible in the recording.
- the embodiment according to claim 6 enables a good mixing of the medium in a pump with two pump elements.
- FIG. 1 shows a pump in a longitudinal section
- Figure 2 shows a designated in Figure 1 with II section of the pump in an enlarged view
- Figure 3 shows the pump in a cross section along line III-III in Figure 2
- Figure 4 shows the pump in a view in
- a pump is shown, in particular a
- the pump has a housing 10 which is designed in several parts and in which a drive shaft 14 driven in rotation is rotatably mounted about a rotation axis 15.
- the drive shaft 14 has at least one cam 16.
- the cam 16 may be a single or multiple cam.
- the pump has at least one or more pump elements 18, each with a pump piston 20 which is driven by the cam 16 of the drive shaft 14 at least indirectly in a lifting movement in at least approximately radial direction to the axis of rotation 15 of the drive shaft 14.
- the pump piston 20 is tightly guided in a cylinder bore 22 of a housing part 24 of the pump. With its end remote from the drive shaft 14, the pump piston 20 in the cylinder bore 22 defines a
- the pump working space 26 has a connection with an inlet opening 32, for example, coming from a feed pump, via an inlet opening into the inlet 32, via which the pump working space 26 moves radially inward toward the axis of rotation 15 of the
- the pump working chamber 26 also has an outlet check valve 34 which opens out of this connection with a drain 36 which leads, for example, to a high-pressure fuel accumulator 38 and fuel via the delivery stroke of the pump piston 20 directed radially outward from the rotational axis 15 of the drive shaft 14 the
- the pump piston 20 is supported indirectly via an element in the form of a roller tappet 42 on the cam 16 of the drive shaft 14.
- the roller tappet 42 comprises a hollow cylindrical tappet body 44, in which a roller shoe 46 is used as a support element.
- the roller shoe 46 has on its side facing the drive shaft 14 a recess 48, which forms a bearing for a cylindrical roller 50, which is thus rotatably mounted about an axis 51 in the recess 48.
- the roller 50 runs on the cam 16 of Drive shaft 14 from.
- the pump piston 20 is coupled in the direction of its longitudinal axis 21 with the roller tappet 42.
- the plunger body 44 is slidably guided in a receptacle 52 in a part 54 of the pump housing 10 in at least approximately vertical direction to the axis of rotation 15 of the drive shaft 14.
- the receptacle 52 is formed for example as a bore.
- the roller tappet 42 and the pump piston 20 connected thereto are acted upon by a spring 40 towards the cam 16.
- the pump housing 10 essentially comprises a basic housing part 54, which is connected to the basic housing part 54
- the bore 52 is formed to guide the plunger body 44 and in this is also a first bearing 58 for the drive shaft
- the basic housing part 54 has a
- Recess 62 in which the at least one cam 16 of the drive shaft 14 is arranged.
- the recess 62 is closed in the direction of the axis of rotation 15 of the drive shaft 14.
- a space 64 is limited, which extends over the circumference of the cam 16.
- a feed 66 and a discharge 68 of liquid medium As a medium is preferably used by the pump to be pumped fuel.
- the supply 66 and discharge 68 of the medium are formed for example as bores which extend through the base housing part 54.
- the feed 66 and discharge 68 of the medium open at the end face of the recess 62 pointing in the direction of the axis of rotation 15 of the drive shaft 14.
- the mouth of the feed 66 and the discharge 68 in the space 64 are at least in the radial direction with respect to the axis of rotation 15 of the drive shaft 14 disposed about the top dead center of the cam 16 or higher.
- the top dead center of the cam 16 is its region 17 with the greatest radial distance from the axis of rotation 15 of the drive shaft 14.
- the supply 66 and discharge 68 thus open with respect to the axis of rotation
- the supply 66 of the medium is preferably arranged in the direction of rotation 13 of the drive shaft 14 at a short distance after the pump element 18 and the discharge 68 of the medium is arranged at a short distance in front of the pump element 18.
- the discharge 68 is seen in the direction of rotation 13 of the drive shaft 14 is preferably arranged at an angle of about 270 ° with respect to the feed 66.
- the medium entering the space 64 through the feed 66 is carried along by the cam 16 during the rotational movement of the drive shaft 14 in its direction of rotation 13 and leakage of the medium through the outlet 68 is possible only after an angular range of about 270 °.
- a circumferential groove 70 is preferably provided, which is in communication with the space 64.
- the pump as shown in Figure 3 has two pump elements 18a and 18b, wherein the second pump element 18b is arranged with respect to the first pump element 18a seen in the direction of rotation 13 of the drive shaft 14 offset by about 90 °. Viewed in the direction of rotation 13 of the drive shaft 14, an angle of approximately 90 ° is present between the first and second pump element 18a, 18b, and an angle of approximately 270 ° exists between the second and first pump element 18b, 18a.
- the two pump elements 18a, 18b are preferably at least substantially identical.
- the supply 66 of the medium opens into the space 64 in the direction of rotation 13 of the drive shaft 14 preferably in the 270 ° angle range between the two pump elements 18a, 18b at a short distance to the second pump element 18b and the discharge 68 of medium preferably opens into the space 64 at least approximately midway in the 90 ° angle region between the two pump elements 18a, 18b and thus offset by an angle of about 270 ° with respect to the feed 66.
- the pump is shown in a view in the direction of arrow IV of Figure 3, wherein the pump housing 10 is partially not shown to make the two pump elements 18a and 18b visible.
- the supply 66 and discharge 68 of the medium are also shown for reasons of clarity, although they run through the basic housing part 54, not shown.
- the caused by the cam 16 flow of the medium in the space 64 is illustrated by arrows 72.
- pressurized medium is supplied into the space 64, preferably fuel, which is conveyed by the pump into the memory 38.
- the fuel is by a feed pump 80 from a
- Fuel supply container 82 is conveyed via the supply 66 into the space 64, flows out of the space 64 via the discharge 68 and passes via the inlet 32 to the inlet of the pump element or elements 18a, 18b. Between the outlet 68 and the inlet of the pump or the elements 18 a, 18 b, a
- metering unit 84 through which the amount of fuel sucked by the pump elements 18a, 18b is variably adjustable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010062678A DE102010062678A1 (de) | 2010-12-09 | 2010-12-09 | Pumpe, insbesondere Kraftstoffhochdruckpumpe |
PCT/EP2011/071784 WO2012076484A1 (de) | 2010-12-09 | 2011-12-05 | Pumpe, insbesondere kraftstoffhochdruckpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2649313A1 true EP2649313A1 (de) | 2013-10-16 |
EP2649313B1 EP2649313B1 (de) | 2014-09-17 |
Family
ID=45315765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11794104.7A Active EP2649313B1 (de) | 2010-12-09 | 2011-12-05 | Pumpe, insbesondere kraftstoffhochdruckpumpe |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2649313B1 (de) |
JP (1) | JP5739545B2 (de) |
CN (1) | CN103249949B (de) |
DE (1) | DE102010062678A1 (de) |
WO (1) | WO2012076484A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2459596B1 (es) * | 2012-11-07 | 2015-03-31 | Bsh Electrodomésticos España, S.A. | Dispositivo refrigerador doméstico que comprende un espacio para alojar productos que han de ser refrigerados y una pared posterior para introducir aire frío en el espacio |
WO2015001571A2 (en) * | 2013-07-04 | 2015-01-08 | Paul Maria | Positive displacement pump mechanism used for pumps and water turbines |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004004705A1 (de) | 2004-01-30 | 2005-08-18 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
DE602005009966D1 (de) * | 2005-12-28 | 2008-11-06 | Sensile Pat Ag | Mikropumpe |
DE102006041673A1 (de) * | 2006-02-20 | 2007-08-23 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
JP4816438B2 (ja) * | 2006-12-20 | 2011-11-16 | 株式会社デンソー | サプライポンプ |
JP2008163829A (ja) * | 2006-12-28 | 2008-07-17 | Denso Corp | 燃料噴射ポンプ |
JP4872684B2 (ja) * | 2007-01-29 | 2012-02-08 | 株式会社デンソー | 燃料供給ポンプ |
US8261718B2 (en) * | 2007-11-01 | 2012-09-11 | Caterpillar Inc. | High pressure pump and method of reducing fluid mixing within same |
DE102009003096A1 (de) * | 2009-05-14 | 2010-11-18 | Robert Bosch Gmbh | Hochdruckpumpe |
-
2010
- 2010-12-09 DE DE102010062678A patent/DE102010062678A1/de not_active Withdrawn
-
2011
- 2011-12-05 JP JP2013542498A patent/JP5739545B2/ja not_active Expired - Fee Related
- 2011-12-05 EP EP11794104.7A patent/EP2649313B1/de active Active
- 2011-12-05 CN CN201180058827.2A patent/CN103249949B/zh active Active
- 2011-12-05 WO PCT/EP2011/071784 patent/WO2012076484A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012076484A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2013545029A (ja) | 2013-12-19 |
JP5739545B2 (ja) | 2015-06-24 |
EP2649313B1 (de) | 2014-09-17 |
WO2012076484A1 (de) | 2012-06-14 |
DE102010062678A1 (de) | 2012-06-14 |
CN103249949A (zh) | 2013-08-14 |
CN103249949B (zh) | 2016-03-02 |
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