EP4182553A1 - Hochdruck-kraftstoffpumpe für ein kraftstoff-einspritzsystem einer brennkraftmaschine - Google Patents
Hochdruck-kraftstoffpumpe für ein kraftstoff-einspritzsystem einer brennkraftmaschineInfo
- Publication number
- EP4182553A1 EP4182553A1 EP21739378.4A EP21739378A EP4182553A1 EP 4182553 A1 EP4182553 A1 EP 4182553A1 EP 21739378 A EP21739378 A EP 21739378A EP 4182553 A1 EP4182553 A1 EP 4182553A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- connecting piece
- outlet
- pump housing
- valve
- 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.)
- Withdrawn
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
- F02M59/44—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
- F02M59/46—Valves
-
- 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
- F02M59/46—Valves
- F02M59/462—Delivery valves
-
- 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
- F02M59/48—Assembling; Disassembling; Replacing
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/005—Pressure relief valves
Definitions
- the invention relates to a high-pressure fuel pump for a fuel injection system of an internal combustion engine according to the preamble of claim 1.
- Such a high-pressure fuel pump is known, for example, from DE 102018211 237 A1.
- This high-pressure fuel pump has a pump housing in which a pumping chamber is formed, in which a pump piston is arranged.
- connection piece is attached to the pump housing at an outlet.
- the connecting piece is flow-connected to the conveying chamber by means of two separate channel sections in the pump housing, a pressure-limiting valve being arranged in one channel section and an outlet valve being arranged in the other channel section.
- a high-pressure fuel pump for a fuel injection system of an internal combustion engine having a pump housing, an outlet (provided on the pump housing) (high-pressure outlet), and a connecting piece attached to the outlet, with (at the outlet) an outlet valve and one Pressure relief valve are provided.
- the outlet valve and/or the pressure relief valve are arranged in the connection piece.
- the connecting piece thus serves as a receptacle for the outlet valve and/or the pressure-limiting valve.
- connection piece at the outlet can be welded to the pump housing or the connection piece can have an external thread, by means of which the connection piece at the outlet can be screwed or screwed into the pump housing.
- a structurally simple and at the same time stable attachment of the connecting piece to the pump housing can hereby be achieved.
- the arrangement of the outlet valve and/or pressure-limiting valve in the connection piece favors the design of a screw connection between the pump housing and connection piece, since space is created for the threads (internal thread on the outlet of the pump housing and external thread on the connection piece). In addition, any strength problems at the weld seam between the nozzle and the housing can be avoided with the screw connection.
- connection piece (arranged at the outlet) can have an external thread at the end that is screwed into the pump housing (screw-in end).
- the pump housing can have a recess with an internal thread that corresponds to the external thread of the connecting piece.
- An external thread can also be formed on the free end of the connecting piece (facing away from the screw-in end) (customer interface).
- the connecting piece can have a biting edge on the end facing the pump housing (in the installed or screwed-in state) (on the free end of the thread). This promotes sealing of the connecting piece relative to the pump housing.
- the biting edge seals by digging in and deforming the housing material.
- the biting edge can be designed to protrude axially on the front side and interact with the front end of the recess provided on the outlet.
- the connecting piece can have one or two channels in an (axial) section facing the pump housing, in which the external thread may be located, with the outlet valve being arranged or arranged in a first channel and/or the pressure-limiting valve being arranged or connected in the second channel. is used.
- This allows the valves to be accommodated in the connection piece in a structurally simple and stable manner.
- the valves can thus be arranged directly in the connection piece.
- the channels can be designed, for example, as bores with contours to accommodate the valves.
- the connecting piece can have a central channel in its interior which is flow-connected to the outlet valve and the pressure-limiting valve or to the channels or channel sections in which the outlet valve and the pressure-limiting valve are arranged.
- the central channel can, for example, be designed as a central bore which, starting from the free end (facing away from the screw-in end), extends axially in sections through the connecting piece. Flow through the connecting piece can thus be achieved.
- the one or two channels can be open towards the end of the connecting piece facing the pump housing (in the installed state), so that the outlet valve and/or the pressure-limiting valve can flow into one of the channels, starting from the end of the connecting piece facing the pump housing can be used.
- the valves can be installed in the connection piece and, if necessary, adjusted starting from the housing side. This contributes to easy assembly.
- a retaining element in particular a retaining ring, can be inserted into the second channel to hold a spring of the pressure-limiting valve. The spring of the pressure relief valve can thus be secured in a simple manner.
- the opening pressure can be adjusted via the position of the retaining ring, in particular before the connection piece is screwed into the pump housing.
- the outlet valve and the pressure-limiting valve can be flow-connected to a pumping chamber in which a piston (pump piston of the high-pressure fuel pump) is arranged or runs by means of a common outlet connection channel (e.g. outlet connection hole).
- a piston pump piston of the high-pressure fuel pump
- a common outlet connection channel e.g. outlet connection hole
- the connecting piece can have a cavity in an (axial) section facing the pump housing, in which the external thread may be located, which is open (axially) towards the pump housing and (radially) outwards (through a wall of the Connecting piece) is limited, wherein in the cavity an insert part (valve battery) is arranged or pressed, in which two channels are formed, wherein the outlet valve is arranged or used in a first channel and the pressure-limiting valve is arranged or used in a second channel.
- the production of the connecting piece and also the insert part can be simplified. In this way, the outlet valve and the pressure-limiting valve can be pressed into the insert part and adjusted in a similar way to a conventional high-pressure fuel pump (virtually from the outside).
- the insert can then be pressed with the two valves (from the housing side) into the cavity of the connection piece.
- An external thread (thread of the customer interface) can be provided on the end (customer side) of the connecting piece facing away from the pump housing (when assembled).
- the connecting piece can be inserted on the housing side Have an external thread for screwing the connecting piece into the pump housing.
- the connecting piece can be designed as a (pure) turned part. This contributes to a comparatively simple and inexpensive manufacture.
- the inner contour of the cavity of the connecting piece can be turned hollow. This measure also favors the production of the connecting piece.
- the insert part can have an essentially cylindrical shape in which the channels (bore contours) for the outlet valve and/or the connecting piece are formed.
- the insert part, the outlet valve and/or the connecting piece represent a preassembled assembly, so that a higher degree of preassembly can be achieved.
- this assembly can be subjected to a separate quality control.
- FIG. 1 shows a schematic representation of a fuel system for an internal combustion engine
- FIG. 3 shows a possible embodiment of the outlet-side connecting piece of the high-pressure fuel pump from FIG.
- FIG. 1 shows a fuel system 10 for an internal combustion engine in a schematic representation.
- Fuel is fed from a fuel tank 12 via a suction line 14 by means of a pre-supply pump 16 into a low-pressure line 18 and from there to a low-pressure connection 20 (inlet 20) of a high-pressure fuel pump 22.
- a fuel for example gasoline, is compressed to a high pressure in the high-pressure fuel pump 22 and fed through a high-pressure connection 24 (outlet 24) via a high-pressure rail 25 and a high-pressure injector 26 to a combustion chamber 28 of the internal combustion engine.
- the fuel can be mixed with air supplied via an intake manifold 30 and ignited, for example by a spark generated by a spark plug.
- part of the fuel supplied to the high-pressure fuel pump 22 via the low-pressure connection 20 can, after flowing through the high-pressure fuel pump 22 without compression, be guided out of the high-pressure fuel pump 22 again through a further low-pressure connection 32 and via a low-pressure injector 34 into the intake manifold 30 will. There, this part of the fuel can mix with the supplied air before the mixture reaches the combustion chamber 28 .
- the high-pressure fuel pump 22 is designed as a piston pump, with a piston 36 being able to be driven, for example, by means of a cam disk 38 (direction of movement oriented vertically in the drawing).
- the high-pressure fuel pump 22 is explained in more detail below with reference to FIGS.
- the high-pressure fuel pump 22 has a pump housing 40 on or in which the components of the high-pressure fuel pump 22 are arranged (cf. FIG. 2).
- a pump cover 42 is non-detachably mounted on the pump housing 40, which houses a low-pressure chamber 44 and can be connected, for example welded, to the pump housing 40.
- connection piece 46 (inlet connection piece 46) is mounted on the side of the pump housing 40 at the inlet 20 .
- the connecting piece 46 is flow-connected to the low-pressure chamber 44 via a connecting channel 48 .
- An external thread 49 can be provided on the connecting piece 46 .
- the low-pressure chamber 44 is flow-connected to the conveying chamber 50 in which the piston 36 is arranged via a further connecting channel (not shown). is. As a result, fuel can be guided from the low-pressure chamber 44 into the pumping chamber 50 .
- connection piece 52 (outlet connection piece 52) is fastened to the side of the pump housing 40 at the outlet 24.
- An outlet valve 54 and a pressure relief valve 56 are also provided at the outlet 24 .
- the outlet valve 54 and the pressure-limiting valve 56 are arranged within the connecting piece 52 .
- the connecting piece 52 has an external thread 58, by means of which the connecting piece 52 at the outlet 24 can be screwed or screwed into the pump housing 40 (recess 59).
- the pump housing 40 has an internal thread 60 that corresponds to the external thread 58 of the connecting piece 52 .
- An external thread 61 can likewise be formed at the free end of the connecting piece 52 (facing away from the pump housing 40 or from the screw-in end).
- the connecting piece 52 can be welded to the pump housing (40) at the outlet (24) within the scope of an embodiment that is not shown.
- the connecting piece 52 has a biting edge 62 on the end facing the pump housing 40 .
- the biting edge 62 is designed to protrude axially on the front side and interacts with the front end of the recess 59 provided on the outlet 24 .
- the connecting piece 52 has two channels 64, 66 in the (axial) section in which the external thread 58 is located, with the outlet valve 54 being arranged or inserted in a first channel 64 and the pressure-limiting valve 56 being arranged or inserted in the second channel 66.
- the channels 64, 66 can, for example, be designed as bores with contours for receiving the valves 54, 56.
- the connecting piece 52 has a central channel or passage 68 in its interior, which is flow-connected to the outlet valve 54 and the pressure-limiting valve 56 or to the channels or channel sections 64, 66 in which the outlet valve 54 and the pressure-limiting valve 56 are arranged . Flow can thus flow through the connecting piece 52 .
- the two channels 64, 66 are open towards the end of the connecting piece 52 facing the pump housing 40, so that the outlet valve 54 and the pressure-limiting valve 56 can each be inserted into one of the channels 64, 66, starting from the end of the connecting piece 52 facing the pump housing 40 .
- a retaining element 72 for example a retaining ring 72 , is inserted into the second channel 66 to hold a spring 70 of the pressure-limiting valve 56 .
- the holding element 72 secures the spring 70.
- the position of the holding element 72 can be used to adjust the opening pressure.
- the outlet valve 54 and the pressure-limiting valve 56 are flow-connected to the pumping chamber 50 by means of a common outlet connection channel 74 , for example an outlet connection bore 74 .
- the flow connection between the valves 54, 56 and the pumping chamber 50 is thus via only one channel.
- the medium (fuel) in the delivery chamber 50 is displaced by an upward movement of the piston 36 and conveyed via the outlet valve 54, which opens away from the delivery chamber 50, and the outlet 24 or the connecting piece 52, for example to a high-pressure rail 25.
- the pressure-limiting valve 56 is connected antiparallel to the outlet valve 54 (opposite opening direction) in order to prevent impermissibly high pressures in the high-pressure area of the fuel system 10 .
- Figure 3 shows a possible embodiment of the outlet 24 or the connecting piece 52.
- the connecting piece 52 can have a cavity 76 in the section in which the external thread 58 is located, which is open axially towards the pump housing 40 and radially outward through a wall of the connecting piece 52 is limited.
- An insert part 78 (valve battery 78) is arranged or pressed into cavity 76, in which two channels 64, 66 are formed, outlet valve 54 being arranged or inserted into a first channel 64 and pressure-limiting valve 56 being arranged or inserted into a second channel 66 (see Fig.3).
- the Insert part 78 can then be pressed with both valves 54, 56 into cavity 76 of connecting piece 52.
- An external thread 61 can be provided on the end of the connecting piece 52 which faces away from the pump housing 40 (in the assembled state).
- the connecting piece 52 has the external thread 58 for screwing the connecting piece 52 into the pump housing 40 .
- the connecting piece 52 is designed as a (pure) turned part.
- Inner contour 80 of cavity 76 of connecting piece 52 is turned hollow.
- the insert part 78 has an essentially cylindrical shape in which the channels 64, 66 for the outlet valve 54 and the pressure-limiting valve 56 are formed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020208847.0A DE102020208847A1 (de) | 2020-07-15 | 2020-07-15 | Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine |
| PCT/EP2021/068578 WO2022012997A1 (de) | 2020-07-15 | 2021-07-06 | Hochdruck-kraftstoffpumpe für ein kraftstoff-einspritzsystem einer brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4182553A1 true EP4182553A1 (de) | 2023-05-24 |
Family
ID=76829562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21739378.4A Withdrawn EP4182553A1 (de) | 2020-07-15 | 2021-07-06 | Hochdruck-kraftstoffpumpe für ein kraftstoff-einspritzsystem einer brennkraftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4182553A1 (de) |
| DE (1) | DE102020208847A1 (de) |
| WO (1) | WO2022012997A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017205949B3 (de) * | 2017-04-07 | 2018-09-27 | Continental Automotive Gmbh | Ventilanordnung für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine |
| DE102017211981B3 (de) * | 2017-07-13 | 2018-09-27 | Continental Automotive Gmbh | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
| DE102018211237A1 (de) | 2018-07-07 | 2020-01-09 | Robert Bosch Gmbh | Kraftstoffpumpe |
-
2020
- 2020-07-15 DE DE102020208847.0A patent/DE102020208847A1/de not_active Withdrawn
-
2021
- 2021-07-06 EP EP21739378.4A patent/EP4182553A1/de not_active Withdrawn
- 2021-07-06 WO PCT/EP2021/068578 patent/WO2022012997A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020208847A1 (de) | 2022-01-20 |
| WO2022012997A1 (de) | 2022-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2344749B1 (de) | Kraftstoff-hochdruckpumpe für eine brennkraftmaschine | |
| DE19535368C2 (de) | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen | |
| EP2108080B1 (de) | Injektor zum einspritzen von kraftstoff in brennräume von brennkraftmaschinen | |
| DE8308036U1 (de) | Haltevorrichtung fuer das kraftstoffeinspritzventil eines dieselmotors | |
| EP1073840A1 (de) | Zuschaltventil in einem kraftstoffeinspritzsystem für brennkraftmaschinen | |
| EP1141539B1 (de) | Kolbenpumpe zur kraftstoffhochdruckerzeugung | |
| WO2020108995A1 (de) | Einspritzventil für ein wassereinspritzsystem eines verbrennungsmotors sowie wassereinspritzsystem mit einem solchen einspritzventil | |
| EP2339164A1 (de) | Druckausgeglichener Kraftstoffinjektor mit Bypass und minimiertem Ventilraumvolumen | |
| DE10117600C1 (de) | Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer direkteinspritzenden Brennkraftmaschine, Kraftstoffsystem sowie Brennkraftmaschine | |
| DE102008041594A1 (de) | Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine | |
| EP2981702B1 (de) | Kraftstoff-kolbensteckpumpe mit einem gehäuse, mindestens einem in dem gehäuse angeordneten axial bewegbaren kolben, und einem koppelabschnitt | |
| EP2807365A1 (de) | Kraftstoffhochdruckpumpe eines einspritzsystems | |
| DE4409133A1 (de) | Druckregelventil | |
| DE102013211147B4 (de) | Niederdruckkreis einer Kraftstofffördereinrichtung eines Kraftstoffeinspritzsystems | |
| DE102009027273A1 (de) | Hochdruckpumpe | |
| EP4217601A1 (de) | Hochdruck-kraftstoffpumpe für ein kraftstoff-einspritzsystem einer brennkraftmaschine | |
| DE10146743A1 (de) | Einspritzventil für eine Brennkraftmaschine | |
| EP4182553A1 (de) | Hochdruck-kraftstoffpumpe für ein kraftstoff-einspritzsystem einer brennkraftmaschine | |
| EP2855918A1 (de) | Vorrichtung zum zumessen von kraftstoff | |
| WO2020011429A1 (de) | Kraftstoffpumpe | |
| EP1537334B1 (de) | Pumpe, insbesondere für eine kraftstoffeinspritzeinrichtung für eine brennkraftmaschine | |
| WO2024115000A1 (de) | Absperrventileinrichtung für ein brennstoffversorgungssystem zur versorgung einer brennkraftmaschine mit insbesondere gasförmigem brennstoff, brennstoffverteileinrichtung für ein solches brennstoffversorgungssystem, und brennstoffversorgungssystem | |
| WO2014206843A1 (de) | Hochdruckpumpe | |
| EP1574701A1 (de) | Common-Rail Injektor | |
| EP1751423B1 (de) | Kraftstoffeinspritzsystem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 17P | Request for examination filed |
Effective date: 20230215 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| 18W | Application withdrawn |
Effective date: 20230510 |