EP3631189A1 - High-pressure fuel pump and fuel filter device - Google Patents
High-pressure fuel pump and fuel filter deviceInfo
- Publication number
- EP3631189A1 EP3631189A1 EP18719108.5A EP18719108A EP3631189A1 EP 3631189 A1 EP3631189 A1 EP 3631189A1 EP 18719108 A EP18719108 A EP 18719108A EP 3631189 A1 EP3631189 A1 EP 3631189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- filter
- longitudinal direction
- seen
- 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 73
- 230000007704 transition Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005086 pumping Methods 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
- F02M59/44—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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/34—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements by the filter structure, e.g. honeycomb, mesh or fibrous
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/44—Filters structurally associated with pumps
-
- 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
- F02M2200/27—Fuel-injection apparatus with filters
Definitions
- DE 10 2014 225 319 A1 describes a high-pressure fuel pump with a housing, an inlet, a delivery section, and an outlet.
- the high-pressure fuel pump is designed as a piston pump, according to the delivery section comprises a pump piston.
- a fuel filter device is not explicitly mentioned in DE 10 2014 225 319 A1, such is usually present to be present in the fuel
- the filter device is designed in the manner of a cylindrical pot, wherein the filter section is flowed through from the outside to the inside and the fuel through the annular base portion of the
- a fuel high pressure pump according to the invention comprises
- the fuel filter device has an annular base portion and a total of at least approximately cylindrical filter portion extending therefrom.
- Filter section in turn has a plurality of web portions which extend in the longitudinal direction from the base portion. In each case between two adjacent web sections a screen section is arranged.
- Fuel filter device further includes a cap-like end portion arranged remotely from the base portion in the longitudinal direction.
- Base portion adjacent first edge portion of the screen section and / or adjacent to the end portion of the second edge portion of the screen section / is seen from a lying in the plane of a lateral surface of the cylindrical filter section center of the screen portion from this concave towards this center.
- the first high-pressure fuel pump according to the invention has an increased service life and reliability compared to the prior art, as well as improved pump performance over the service life. This is achieved by the web portions are made reinforced in the axial edge regions of the screen sections by being made wider in the circumferential direction. This is in turn caused by the fact that the first axial edge region or the second axial edge region of a sieve section is concavely curved as seen from the center of the sieve section. Overall, in this way in the plan view rounded edge areas of
- the concave curvature which is meant here, is not that already existing in the circumferential direction extending curvature about a longitudinal axis of the fuel filter device. Rather, the concave curvature meant here is quasi in the plane of a cylindrical jacket surface of the fuel filter device and runs, as it were, in the axial direction.
- the first fuel high-pressure pump according to the invention and the
- Corresponding fuel filter devices are based on the recognition that there is the danger of a flow through the fuel filter device from outside to inside, as it is present in numerous high-pressure fuel pumps, in that a wire section, which is actually curved outwards as viewed from a longitudinal axis of the fuel filter device, folds inwards. This applies in particular if dirt particles have accumulated on the sieve section. This also leads to a considerable
- the first and / or the second edge region are elliptical or parabolic or circularly curved.
- An elliptical or parabolic curvature has the advantage that in this way the broadening of the web sections in the immediate vicinity of the base section and / or the end section is particularly large. If an ellipse is used as the base geometry, it can be generated from a conical or cylindrical section.
- the length of the curved first edge region, which is thus adjacent to the base portion is greater than the length of the curved second edge region, that is to the
- End portion is adjacent. This is based on the consideration that when the corresponding screen section works due to the flow from outside to inside, that area of the screen section, which then has the smallest distance to the longitudinal axis of the fuel filter device and thus throttles the strongest, not in the Center is located between the base portion and the end portion, but is shifted towards the end portion, that is closer to the end portion than the base portion.
- That area of the screen section which then has the smallest distance to the longitudinal axis of the fuel filter device and thus throttles the strongest, not in the Center is located between the base portion and the end portion, but is shifted towards the end portion, that is closer to the end portion than the base portion.
- a lateral transition region between a web section and the end section and / or the base section, seen from the outside is concave.
- the fuel filter device increases. This is possible in particular because of the concave curvature of the first and second edge regions provided according to the invention.
- the second fuel high pressure pump according to the invention is initially basically identical in construction as the first mentioned above
- the strainer section of the fuel filter device in the normal state is not curved radially outwards, but is generally flat overall, so that the filter section has an overall polygonal cross-section.
- Such a sieve section can, in principle, even at the highest pressure load
- FIG. 1 shows a first longitudinal section through a high-pressure fuel pump according to the invention
- Figure 3 is a perspective view of a first embodiment of a
- Figure 4 is a section through an end portion of the fuel filter device of Figure 3.
- FIG 5 shows a section through a second embodiment of a fuel filter device.
- a high-pressure fuel pump carries in Figures 1 and 2 in total the reference numeral 10. It comprises a pump housing 12, which in the
- an inlet 14 is formed by an inlet connection 16, which is welded to the pump housing 12. From the inlet 14 extends in the pump housing 12, a first fluid channel section 18 in the radial direction inwards. It goes over into a second fluid channel section 20, which extends in the axial direction in the pump housing 12 up to a pressure damper device 22.
- This is a diaphragm damper, which will not be further described here.
- the pressure damper device 22 is accommodated in a damper chamber 24 which is formed between an upper end face 26 of the pump housing 12 and a housing cover 28 which is welded onto the pump housing 12.
- the fluid channel section 20 opens into the damper chamber 24.
- a third fluid channel section 30 extends from the upper end side 26, that is to say away from the damper space 24, up to one
- Inlet valve 32 which is designed as a quantity control valve. This means that the inlet valve 32 can be forcibly held in an open position in a manner not described here in detail.
- Inlet valve 32 formed as a check valve, which opens to a delivery chamber 34 through.
- the delivery chamber 34 is essentially limited by a wall of a blind bore extending axially in the pump housing 12 (without reference numeral) and a pump piston 36.
- the pump piston 36 is guided movably in a sliding sleeve (without reference numeral) in the sliding seat and in the axial direction.
- the delivery chamber 34 and the pump piston 36 together form a delivery section 38.
- a fourth fluid channel section 40 which via a designed as a check valve outlet valve 42 to a fourth fluid channel section 40, which via a designed as a check valve outlet valve 42 to a fourth fluid channel section 40, which via a designed as a check valve outlet valve 42 to a fourth fluid channel section 40, which via a designed as a check valve outlet valve 42 to a fourth fluid channel section 40, which via a designed as a check valve outlet valve 42 to a fourth fluid channel section 40, which via a designed as a check valve outlet valve 42 to a
- Outlet 44 leads, which forms an outlet 46.
- the outlet port 44 is welded to the side wall of the pump housing 12.
- a between the exhaust valve 42 and the outlet port 44 located space (without reference numeral) is connected via a pressure relief valve 48 to the delivery chamber 34.
- the high-pressure fuel pump 10 is part of a fuel system, not shown, of an internal combustion engine.
- fuel is delivered at a relatively low pressure by a prefeed pump.
- fuel is conveyed under relatively high pressure to a fuel rail, to which injectors are connected, which inject the fuel into combustion chambers of the internal combustion engine.
- the fuel passes through the inlet 14 first to the pressure damper device 22 and from there via the inlet valve 32 to the delivery chamber 34, where it is compressed to a high pressure and discharged via the outlet 46.
- Fluid channel section 18 and in the second fluid channel section 20 is indicated in Figure 1 by an arrow 49.
- a fuel filter device 50 is arranged in the first fluid channel section 18.
- This is a total pot-shaped and comprises an annular base portion 52 which is made in this case made of brass and which is held via a press fit in the first fluid channel section 18, that is pressed into the first fluid channel section 18.
- annular base portion 52 extends in the axial direction of the
- the filter section 54 is in the present case made of PPS plastic. It comprises a total of three web sections 56, which protrude in the axial direction of the base section 52 from the base section 52. Between two adjacent web portions 56 there is a respective sieve section 58, which is formed by a sieve-like filter medium. The lower protruding ends of the web sections 56 in FIG. 1 are connected to one another by an annular and upwardly closed cap-like end section 60, which is also made of PPS plastic. The end portion 60 is thus from
- Base portion 52 disposed away. In a not shown
- the filter device 50 could also be made entirely of plastic.
- the filter section 54 viewed from the base section 52, extends approximately counter to the flow direction (arrow 49) of the fuel. This means that the fuel from radially outside to radially inwardly passes through the screen sections 58 and then flows axially upward through the base section 52 of the fuel filter device 50.
- the fuel filter device 50 in a first embodiment will be explained in more detail with reference to FIGS. 3 and 4.
- the base portion 52 has a larger outer diameter than the filter portion 54.
- the visible in Figure 3 screen portion 58 has two parallel to the longitudinal axis 62 extending, seen in the circumferential direction of the filter portion 54 by a A first axial edge region 66 of the screen section 58 is adjacent to the base section 52, a second axial edge section 68 of FIG
- Sieve section 58 is adjacent to the end section 60.
- the first edge region 66 is seen from a centered on an imaginary cylindrical lateral surface of the filter portion 54 center 70 of the screen portion 58 from this concave toward concave, namely elliptically curved. In an embodiment not shown, the first edge region could also be curved in a parabolic or circular manner. Also, the second edge region 68 is seen from the center 70 of the wire section 58 to this center 70th concave, namely in turn elliptically curved. Again, in an embodiment not shown, the second edge region could also be parabolic or circularly curved. An extension of the first edge region 66 in the axial direction, that is to say in the direction of the longitudinal axis 62, is designated in FIG.
- an extension of the second edge region 68 in the axial direction, that is also in the direction of the longitudinal axis 62, is denoted by ⁇ . It can be seen from FIG. 3 that the length ke of the curved first edge region 66 is greater than the length of the curved second edge region 68.
- the curved edge regions 66 and 68 have them
- Edge regions 66 and 68 adjacent web portions 56 each have a widened region, which is shown in Figure 3 by way of example for the there visible lower web portions 56 hatched and there carries the reference numeral 72. As can be seen from FIG. 3, but in particular from FIG. 4, lateral transition regions 74 are also provided between the web sections 56 and
- Base portion 52 seen from radially outside, executed concave rounded.
- lateral transition regions 76 with which the web portions 56 run into a conical transition region 78, which is present between the filter section 54 and the base section 52, run concavely rounded from the radial outside.
- Web portions 56 denotes. With b is a width of a web portion 56 in the circumferential direction (in an embodiment in which a
- Web portion has a different width than another web portion, b denotes the width of the circumferentially thinnest web portion).
- b denotes the width of the circumferentially thinnest web portion.
- the course of the first edge region 66 may follow an ellipse whose extent in the longitudinal direction 62 of the fuel filter device 50 is between 0.1 and 1 times I, and whose extent in the circumferential direction is between 0.1 and 0.5 times a. Furthermore, the course of the first Edge region 66 follow a radius with a radius dimension in the range of 0.1 -0.5 times a. A rounding of the first edge region 66 to the
- Web sections 56 and towards the base section 52 can be made either by a radius in the range of 0.1-0.5 times a or by an ellipse whose major or minor peak is smaller than a.
- the dimensioning rules mentioned above for the first edge region 66 can likewise be applied to the second edge region 68.
- Parting peak none than 0.5 times a. Further fillets of edges of web portions 56 may be performed in the same manner.
- the screen sections 58 are not curved outwards in the normal position (shown by dashed lines in FIG. 5), but are designed as straight, flat and flat screen sections 58.
- a filter section 54 is formed, which has an overall polygonal, in the embodiment of Figure 5 triangular cross-section.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017209293.9A DE102017209293A1 (en) | 2017-06-01 | 2017-06-01 | High-pressure fuel pump, as well as fuel filter device |
PCT/EP2018/059738 WO2018219548A1 (en) | 2017-06-01 | 2018-04-17 | High-pressure fuel pump and fuel filter device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3631189A1 true EP3631189A1 (en) | 2020-04-08 |
EP3631189B1 EP3631189B1 (en) | 2022-08-10 |
Family
ID=62027978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18719108.5A Active EP3631189B1 (en) | 2017-06-01 | 2018-04-17 | High-pressure fuel pump and fuel filter device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3631189B1 (en) |
DE (1) | DE102017209293A1 (en) |
ES (1) | ES2929775T3 (en) |
WO (1) | WO2018219548A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4131535A1 (en) * | 1991-09-21 | 1993-03-25 | Bosch Gmbh Robert | ELECTROMAGNETICALLY OPERATED INJECTION VALVE |
IT1319838B1 (en) * | 2000-02-15 | 2003-11-03 | Elasis Sistema Ricerca Fiat | IMPROVEMENT OF A SOLENOID VALVE FOR THE ADJUSTMENT OF THE PRESSURE OF FUEL SUPPLY TO A COMBUSTION ENGINE |
DE102013201897A1 (en) * | 2013-02-06 | 2014-08-07 | Robert Bosch Gmbh | Valve for metering fluid |
DE102014225319A1 (en) | 2014-12-09 | 2016-06-09 | Robert Bosch Gmbh | High-pressure fuel pump with a piston |
DE102015221308A1 (en) * | 2015-10-30 | 2017-05-04 | Robert Bosch Gmbh | High pressure pump for a fuel injection system |
-
2017
- 2017-06-01 DE DE102017209293.9A patent/DE102017209293A1/en active Pending
-
2018
- 2018-04-17 WO PCT/EP2018/059738 patent/WO2018219548A1/en active Application Filing
- 2018-04-17 ES ES18719108T patent/ES2929775T3/en active Active
- 2018-04-17 EP EP18719108.5A patent/EP3631189B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
ES2929775T3 (en) | 2022-12-01 |
DE102017209293A1 (en) | 2018-12-06 |
EP3631189B1 (en) | 2022-08-10 |
WO2018219548A1 (en) | 2018-12-06 |
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