EP2697501A1 - Kraftstoffhochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine - Google Patents
Kraftstoffhochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschineInfo
- Publication number
- EP2697501A1 EP2697501A1 EP12706236.2A EP12706236A EP2697501A1 EP 2697501 A1 EP2697501 A1 EP 2697501A1 EP 12706236 A EP12706236 A EP 12706236A EP 2697501 A1 EP2697501 A1 EP 2697501A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pump
- pressure
- line
- pressure fuel
- 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 title claims abstract description 138
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 238000002347 injection Methods 0.000 title claims abstract description 9
- 239000007924 injection Substances 0.000 title claims abstract description 9
- 239000000126 substance Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000013022 venting Methods 0.000 description 2
- 235000016496 Panda oleosa Nutrition 0.000 description 1
- 240000000220 Panda oleosa Species 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001105 regulatory effect Effects 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- 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
- F04B1/0404—Details or component parts
- F04B1/0452—Distribution members, e.g. valves
Definitions
- the present invention relates to a high-pressure fuel pump for a
- fuel bea uf sch ag pump housing having pump housing and with at least one of a rotatably mounted in the pump housing pump shaft via a in a guide to form an upper
- Plunger space slide-mounted roller tappet actuated pump element wherein the pump interior is fluidly connected to the plunger space.
- Such a high-pressure fuel pump is known from DE 10 2007 038 530 A1.
- This high-pressure fuel pump has a pump housing with a pump interior, wherein the pump interior with a
- Fuel supply and a K raftstoff a bf hru ng is interconnected.
- the fuel supplied into the pump interior via the fuel supply is also passed via a corresponding connecting line to a metering unit integrated in the pump housing, which supplies fuel to suction valves of two pump elements in a controlled manner.
- Tappet spaces between the roller tappets which actuate the pump elements and the pump elements are provided via a compensation and / or
- Fuel above the two roller tappet is pumped at each pump stroke of the one plunger space in the other plunger space and heats up.
- the object of the invention is to provide a high-pressure fuel pump with which a targeted flow of fuel through the at least one plunger space is ensured.
- the at least one tappet space is connected to a fuel line effecting a fuel nozzle.
- a targeted flow through the plunger chamber with fuel can take place through the fuel line.
- the fuel line is a
- Fuel supply In this case, the fuel to be supplied to the high-pressure fuel pump is then supplied wholly or partly via this KraftstoffzuWORK. From the plunger chamber, the supplied fuel then passes through the fluid connection in the pump interior and from there in a known manner on to a metering unit and at the same time a subset of the fuel thus supplied is forwarded for lubrication and cooling of the bearing points of the pump shaft.
- the fuel line is a
- the amount of fuel to be supplied to the high-pressure fuel pump is further introduced directly into the pump interior and from there through the fluid connection at least a subset forwarded into the plunger chamber and discharged from the latter via a Kraftstoffab2020 Anlagen.
- This embodiment also provides reliable and intensive cooling of the roller tappet and the upper plunger space.
- connection kana! opens in a further embodiment of the
- a throttle is inserted into the fuel line.
- a valve such as a controlled valve or a
- Check valve be used. Regardless of whether the fuel line is a fuel supply line or a
- Kraftstoffab2020 is, a precisely metered or adjustable flow through the plunger space.
- the fuel line the
- Fuel supply is, can be divided by the throttle, a distribution of directly into the pump interior introduced amount of fuel and over the
- Fuel line, the at least one plunger space and the corresponding fluid connections in the pump interior amount of fuel supplied are precisely metered.
- Such a configuration is particularly in a
- Fuel supply of the high-pressure fuel pump can be selected by an electrically operated low-pressure pump.
- the fuel line is a Kraftstoffab2020 Gustav, which in turn is connected in a further embodiment with the suction side of the mechanical low-pressure pump and can be used to adjust the flow in the Kraftstoffab2020technisch a throttle.
- a valve in particular a check valve, may be inserted into the fuel discharge line in order to ensure a sufficient system pressure in the pump interior, in particular at the start of the system.
- the valve can also be designed so that it also assumes the throttle function.
- the pump interior is with a
- Fuel supply or fuel supply can be interconnected.
- a Kraftstoffabloom as a connection of the plunger chamber or the connecting channel can be easily inserted into the pump housing for connection to the fabric a bf hru ng.
- the throttle for adjusting a flow rate by, for example, a corresponding
- the throttle according to the invention preferably has a flow diameter of 0, 1 to 1, 5mm. At a Small diameter is derived correspondingly little fuel and this throttle has a predominant venting function, while with a large throttle diameter of> 0.5mm both a venting function and an intensive cooling function is guaranteed.
- FIG. 1 is a schematic sectional view of a fuel lift pump with two pump elements actuated by roller tappets, wherein the two upper tappet spaces are connected via a connection channel which is connected to a fuel line.
- FIG. 2 shows, in an alternative representation to FIG. 1, an embodiment in which a fuel line which opens into a connecting channel has a
- Fuel supply line is,
- FIG 3 is a similar view to Figure 2 shows an embodiment in which the fuel line is a Kraftstoffabschreib protest and
- Figure 4 is an illustration of an executed pump housing with a
- Figure 1 shows a high-pressure fuel pump, which is used for example in a common rail injection system for a self-igniting internal combustion engine.
- This high-pressure fuel pump delivers the fuel supplied to a high-pressure accumulator with a pressure of in the range of 1600 bar. From the high-pressure accumulator, the fuel of fuel injectors to Injection taken controlled in associated combustion chambers of the internal combustion engine.
- the high-pressure fuel pump has a pump housing 1 with a
- a pump shaft 3 is rotatably mounted and is driven directly or indirectly by, for example, a camshaft or crankshaft of the internal combustion engine.
- the pump shaft 3 has two cams, which cooperate with rollers 4 mounted in each case in a tappet body 6 of roller tappets 5.
- the pump shaft 3 is rotated in the direction of the arrow and, in cooperation with the rollers 4, the cams convert the rotational movement of the pump shaft 3 into a translational up and down movement of the roller tappets 5.
- the roller tappets are a guide 7, which is part of a
- Pump element 8 is slidably mounted.
- an upper tappet space 9 is formed, in which a cooperating with the roller tappet 5 Pumpenkoiben 10 projects.
- the pump piston 10 is guided in a pump cylinder and conveys into a recessed in the pump cylinder and a pump cylinder head
- the upper plunger chambers 9 are via air connections 1 1 with the
- the connecting channel 12 is further connected to a fuel line 13, which, as will be explained in the following figures, is connected to the fuel system of the high-pressure fuel pump.
- a fuel supply 14 corresponding to the pump interior 2 and a fuel discharge 5 are further admitted.
- the pump housing 1 has bearings 16a, 16b (housing bearings and flange bearings), both of which are fuel lubricated.
- a partial flow of the fuel supply 14 in this embodiment in the Pump interior 2 introduced fuel for lubrication (and cooling) through the bearings 16a, 16b out and discharged.
- the discharged fuel quantity can be conducted into a fuel tank 17 or to the suction side of a low-pressure pump 18.
- the low-pressure pump 18 conveys the fuel stored in the fuel tank 17 via the fuel feed tube 14 into the fuel tank
- the low-pressure pump 18 is designed in the embodiment of Figure 2 as an electrically operated low-pressure pump 18 and may be regulated with respect to their flow rate.
- the pump interior 2 has a connection 19 to a metering unit, which defines the fuel supplied to the pump elements 8 and the pump working spaces.
- the connection 19 is designed such that in the
- Pump housing 1 is incorporated an opening into which the metering unit for producing a controlled internal connection between the
- Pump interior 2 and the pump elements 8 is inserted. Furthermore, the pump housing 1, the fuel discharge 15, via a
- Overflow valve 20 is also connected to a discharge line, which normally opens into the fuel tank 17. The fuel is discharged into the interior of the pump and is not forwarded by the metering unit and is not required for lubrication
- the connecting line of the low-pressure pump 18 with the fuel supply 14 is in the embodiment with a continuing fuel supply
- the high-pressure fuel pump according to FIG. 3 is connected to a low-pressure pump 18 designed as a gear pump, the fuel discharge 15 opening from the pump interior 2 into the suction line 23 to the low-pressure pump 18.
- the total amount of fuel supplied to the high-pressure fuel pump is determined by the
- Fuel supply of the metering unit is constructed.
- FIG 4 shows a plan view of the unpopulated pump housing 1 of the high-pressure fuel pump.
- the pump housing 1 has two recesses 26a, 26b into which the pump elements 8 are inserted. Furthermore, in the pump housing 1, the fuel supply 14 and the fuel discharge 15 are incorporated in the form of adjacent holes. Finally, a receptacle 27 for the metering unit is embedded in the pump housing 1. The together with the recesses 26 a, 26 b when installed
- the connecting channel 12 connected to each other.
- the connecting channel 12 is divided into two mutually angled sub-channels.
- One of these sub-channels has an extension, which represents the Kraftstoffabloomtechnisch 24, and which opens into the fuel discharge 15.
- the fuel component 24 is formed over a partial length with a smaller diameter, this partial length forming the throttle point.
- This throttle point with a diameter of preferably greater than 0.5 mm and less than 1, 5 mm determines the in the
Landscapes
- 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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110007352 DE102011007352A1 (de) | 2011-04-14 | 2011-04-14 | Kraftstoffhochdruckpumpe für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine |
PCT/EP2012/053005 WO2012139799A1 (de) | 2011-04-14 | 2012-02-22 | Kraftstoffhochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2697501A1 true EP2697501A1 (de) | 2014-02-19 |
EP2697501B1 EP2697501B1 (de) | 2019-05-01 |
Family
ID=45771804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12706236.2A Active EP2697501B1 (de) | 2011-04-14 | 2012-02-22 | Kraftstoffhochdruckpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2697501B1 (de) |
CN (1) | CN103459822B (de) |
DE (1) | DE102011007352A1 (de) |
WO (1) | WO2012139799A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013212145A1 (de) * | 2013-06-25 | 2015-01-08 | Robert Bosch Gmbh | Pumpe |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10260775A1 (de) * | 2002-12-23 | 2004-07-01 | Daimlerchrysler Ag | Kraftstoffversorgungssystem für Verbrennungsmotoren mit Direkteinspritzung |
DE10335603A1 (de) * | 2003-08-04 | 2005-03-03 | Robert Bosch Gmbh | Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
DE10356262A1 (de) * | 2003-12-03 | 2005-06-30 | Robert Bosch Gmbh | Radialkolbenpumpe, insbesondere für Kraftstoffeinspritzsysteme |
DE102007038530A1 (de) | 2007-08-16 | 2009-02-19 | Robert Bosch Gmbh | Kraftstoffhochdruckpumpe |
DE102009003094A1 (de) * | 2009-05-14 | 2010-11-18 | Robert Bosch Gmbh | Kraftstoff-Hochdruckpumpe |
-
2011
- 2011-04-14 DE DE201110007352 patent/DE102011007352A1/de not_active Withdrawn
-
2012
- 2012-02-22 CN CN201280017762.1A patent/CN103459822B/zh active Active
- 2012-02-22 EP EP12706236.2A patent/EP2697501B1/de active Active
- 2012-02-22 WO PCT/EP2012/053005 patent/WO2012139799A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN103459822A (zh) | 2013-12-18 |
DE102011007352A1 (de) | 2012-10-18 |
CN103459822B (zh) | 2016-11-09 |
WO2012139799A1 (de) | 2012-10-18 |
EP2697501B1 (de) | 2019-05-01 |
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