EP3861207A1 - High-pressure fuel pump comprising a connection piece - Google Patents
High-pressure fuel pump comprising a connection pieceInfo
- Publication number
- EP3861207A1 EP3861207A1 EP19769434.2A EP19769434A EP3861207A1 EP 3861207 A1 EP3861207 A1 EP 3861207A1 EP 19769434 A EP19769434 A EP 19769434A EP 3861207 A1 EP3861207 A1 EP 3861207A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel pump
- pressure fuel
- wall
- pressure
- connection
- 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- Withdrawn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
- F02M59/48—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
- 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
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0017—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
-
- 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
- F02M55/004—Joints; Sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/088—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
Definitions
- the invention relates to a high-pressure fuel pump according to the preamble of claim 1.
- Fuel systems for internal combustion engines are known from the market, in which fuel is conveyed from a fuel tank by means of a prefeed pump and a mechanically driven fuel high pressure pump under high pressure into a high pressure accumulator (“rail”) located in a high pressure area.
- a high pressure accumulator located in a high pressure area.
- a high-pressure fuel pump is usually arranged in a piston chamber, in which the fuel is compressed to the high pressure by a piston.
- the piston chamber is fluidly connected to a low pressure area. This fluidic connection usually includes one at the
- High-pressure fuel pump provided connection piece on the one
- Connection section of a low pressure line is arranged.
- a fuel high-pressure pump with a tubular connecting piece for connection to a connecting section of a fuel line is therefore initially proposed.
- an outer wall of the connecting piece has at least one recess directed radially inward, in which a securing means protruding radially outward for the connecting section of the fuel line is arranged.
- the means of security is therefore the
- Connection section of the fuel line can be arranged.
- the depression can in particular be designed like a groove.
- connection piece with an outer wall having a recess is comparatively inexpensive. Furthermore, a connection piece produced in this way is particularly durable. The risk of undesired premature component failure is reduced in particular by the fact that there is no or almost no component weakening of the component
- connection piece is available in the area of the recess. Nevertheless, the connection section can be securely attached to the connection piece. This is due to the fact that the securing means is arranged in the depression. At this
- Securing means can in turn be attached to the connection section.
- the depression is designed to run all the way around in a circumferential direction. It is particularly simple to produce a depression formed in this way, for example by a forming process, in particular a deep-drawing process. Furthermore, a securing means can be arranged comparatively simply on a circumferentially provided depression.
- the securing means comprises one
- the locking ring can be particularly easily attached in the recess.
- the securing ring can in particular not be completely closed, so that it can be expanded somewhat, for example by means of pliers, in order to then position the securing ring in the recess in a form-fitting manner.
- the circlip can in particular be designed as a circular ring section and thus be rectangular in cross section.
- the depression can in particular be complementary to the retaining ring, so that the retaining ring can be stored in the depression without play.
- the locking ring is a snap ring.
- the snap ring can be made in particular of spring steel.
- the snap ring has, in particular, ends which are not in alignment with one another in the non-arranged state, so that after the arrangement in the depression, the snap ring is braced axially in the depression and is thus secured against loss.
- the securing means is designed to arrange a connection section designed as a quick connector connection. Consequently, the connection section can in particular have a snap lock in order to hold the connection section on the securing means.
- the depression is provided in the middle area, preferably in the middle, of the outer wall.
- connection section designed as a quick connector connection, designed according to the SAE J2044 standard, can be arranged on the connection piece.
- the depression adjoins a cylindrical section of the outer wall of the connecting piece, preferably is arranged between two cylindrical sections of the outer wall of the connecting piece and adjoins the latter.
- the outer wall can in particular be formed in one piece. Furthermore, this can in particular have a constant wall thickness. So is
- the inner diameter of the outer wall in the region of the depression is smaller than the inner diameter of the outer wall in the region of the adjacent cylindrical sections.
- the outer wall of the connecting piece comprises at least one section which is produced by a shaping process, in particular a deep-drawing process.
- the entire outer wall of the connecting piece is produced by a forming process, in particular a deep-drawing process. Manufacturing by means of a deep-drawing process is comparatively inexpensive.
- the connecting piece can be produced in particular with a comparatively low degree of deformation. This is due to the fact that the formation of a recess in the deep-drawing process only requires a comparatively low degree of deformation, so that a high strength can be continuously provided in the outer wall. The fact that in particular at no point a high
- the fuel high-pressure pump can in particular have a piston chamber, the piston chamber being connectable to a low-pressure region or a high-pressure region of a fuel system of an internal combustion engine via the connection piece and the connection section arranged thereon. Consequently, in particular a low pressure line or a high pressure line can
- the connecting piece is arranged on a pump housing, in particular soldered or welded to the pump housing.
- the low-pressure region can be fluidly connected to the piston chamber, so that fuel to be delivered can reach the piston chamber from the low-pressure region via the connecting piece.
- the high-pressure fuel pump is a
- Compression damper device with a cover element comprises.
- the connecting piece can be arranged on the cover element, in particular soldered or welded to the cover element.
- the low-pressure region can be fluidly connected to the piston chamber, so that too Conveying fuel from the low pressure area can get into the pressure damper device via the connecting piece and from there into the piston chamber.
- Figure 1 is a simplified schematic representation of a
- Figure 2 is a perspective view of a portion of a
- Fuel high pressure pump comprising a connecting piece with securing means arranged thereon;
- Figure 3 is a sectional view of a portion of the
- Figure 4 is a sectional view as in Figure 3 without securing means.
- Figure 5 is a schematic plan view of the securing means according to
- FIG. 1 shows a fuel system 10 for a not shown
- a fuel tank 12 becomes fuel via a suction line 14, by means of a prefeed pump 16 and a
- Low-pressure line 18 comprising a connection section 20 as
- Piston pump executed high-pressure fuel pump 22 supplied.
- An inlet valve 24 is arranged in the fuel high pressure pump 22. Via the connection section 20 and the inlet valve 24 there is a piston chamber 26 with a low-pressure region 28, which the prefeed pump 16, the suction line 14, and the Includes fuel tank 12, fluidly connectable.
- the inlet valve 24 can be forcibly opened via an actuating device 30.
- Actuator 30 and thus the inlet valve 24 are via a
- Control unit 32 can be controlled. By opening and closing the
- a piston 34 of the high-pressure fuel pump 22 can be moved up and down along a longitudinal piston axis 38 by means of a drive 36 designed here as a cam disk, which is shown schematically by an arrow with the reference symbol 40.
- An outlet valve 44 is arranged hydraulically between the piston chamber 26 and an outlet 42 of the high-pressure fuel pump 22, which outlet valve can open to a high-pressure region 45, which comprises a high-pressure accumulator 46 (“rail”).
- the high-pressure accumulator 46 and the piston chamber 26 can be fluidly connected via a pressure-limiting valve 48, which opens when a limit pressure in the high-pressure accumulator 46 is exceeded.
- the high-pressure fuel pump 22 initially includes a
- a connecting piece 56 is fastened in a recess 54 in the pump housing 52 (cf. FIG. 3).
- the piston chamber 26 is fluidly connected to the low-pressure region 28 via the connecting piece 56. Fuel to be delivered thus reaches the piston chamber 26 from the low-pressure region 28 via the connecting piece 56.
- a pumping area 52 is provided with a connection area 58.
- a pressure damper device, not shown, which comprises a pot-like cover element, can be fastened to the connecting region 58.
- the connecting piece 56 has a longitudinal axis 62. Furthermore, the connecting piece 56 comprises a tubular outer wall 60 that runs rotationally symmetrically about the longitudinal axis 62.
- Connection piece 56 is produced by a deep-drawing process.
- the entire outer wall 60 thus forms a section 64 which is produced in a deep-drawing process.
- the connecting piece 56 is the section 64 which is in one
- Thermoforming process is formed, forms.
- the outer wall 60 of the connecting piece 56 has a first
- first circular cylindrical section 66 and the second circular cylindrical section 68 are of the same or substantially the same length.
- a groove-like and radially inward depression 70 which is completely circumferential and which is adjacent to the two circular cylindrical sections 66 and 68.
- the depression 70 is arranged in the central region of the connecting piece 56. The recess 70 is during the manufacturing process of the
- the outer wall 60 is consequently formed in one piece. Furthermore, this has a constant wall thickness d (see FIG. 4). Thus, the inner diameter D2 of the outer wall 60 in the region of the depression 70 is smaller than that
- the depression 70 is consequently introduced into the connecting piece 56 solely by a corresponding deformation during the deep-drawing process, the degree of deformation required to form the depression 70 being comparatively low.
- a securing means designed as a snap ring 78 is arranged in the recess 70 and projects radially outward.
- the snap ring 78 can be designed in a known manner and thus, in particular, not in a completely circumferential manner, but rather, as shown strictly schematically in FIG.
- the snap ring 78 has in particular ends 77, 79, which are not aligned with one another in the non-arranged state, so that after the arrangement in the recess 70, the snap ring 78 is arranged axially braced in the recess 70 and is thus secured against loss.
- the snap ring 78 can be arranged in the recess 70 by means of snap ring pliers, not shown.
- the snap ring 78 In the radial direction, that is to say perpendicular to the longitudinal axis 62, the snap ring 78 is in the state arranged on the recess 70 over the outside 61 of FIG Outer wall 60 over (see FIGS. 2 and 3).
- the connecting section 20, not shown in detail, of the low-pressure line 18 can be fastened to the snap ring 78.
- the connection section 20 can in particular be designed as a quick connector connection with a snap closure, so that the connection section 20 can be locked and detachably arranged on the snap ring 78.
- connection section 20 designed according to the SAE J2044 standard can be arranged thereon.
- the outer wall 60 of the connecting piece 56 Adjacent to the first circular cylindrical section 66, the outer wall 60 of the connecting piece 56 has a transition area 72 (cf. FIGS. 3 &
- the transition region 72 Seen in the direction of the longitudinal axis 62 of the connecting piece 56, the transition region 72 is followed by a fastening section 74
- the connecting piece 56 is fastened to the pump housing 52, in the present case the connecting piece 56 being welded to the pump housing 52.
- the connecting piece 56 has an inlet opening 76, which at the end of the
- Connection piece 56 is arranged.
- the entire one-piece outer wall 60 of the connecting piece 56 is produced in a deep-drawing process. Consequently, the entire one-piece outer wall 60 of the connecting piece 56 is produced in a deep-drawing process. Consequently, the entire one-piece outer wall 60 of the connecting piece 56 is produced in a deep-drawing process. Consequently, the entire one-piece outer wall 60 of the connecting piece 56 is produced in a deep-drawing process. Consequently, the entire one-piece outer wall 60 of the connecting piece 56 is produced in a deep-drawing process. Consequently, the
- Connection piece 56 can be realized inexpensively. Furthermore, the connecting piece 56 only has locations with a comparatively small number
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (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 |
---|---|---|---|
DE102018216850.4A DE102018216850A1 (en) | 2018-10-01 | 2018-10-01 | High pressure fuel pump with a connector |
PCT/EP2019/074334 WO2020069833A1 (en) | 2018-10-01 | 2019-09-12 | High-pressure fuel pump comprising a connection piece |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3861207A1 true EP3861207A1 (en) | 2021-08-11 |
Family
ID=67982051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19769434.2A Withdrawn EP3861207A1 (en) | 2018-10-01 | 2019-09-12 | High-pressure fuel pump comprising a connection piece |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3861207A1 (en) |
CN (1) | CN112771268A (en) |
DE (1) | DE102018216850A1 (en) |
WO (1) | WO2020069833A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4750765A (en) * | 1987-07-27 | 1988-06-14 | Stratoflex, Inc. | Quick-connect coupling |
US6206432B1 (en) * | 1998-01-26 | 2001-03-27 | Nok Corporation | Ball-lock-type quick-acting connector |
US7547048B2 (en) * | 2005-12-09 | 2009-06-16 | Itt Manufacturing Enterprises, Inc. | Fluid quick connector with integral pivotal retainer |
JP2008057451A (en) * | 2006-08-31 | 2008-03-13 | Hitachi Ltd | High-pressure fuel supply pump |
DE102007019332A1 (en) * | 2007-04-24 | 2008-10-30 | Continental Automotive Gmbh | Connection element for fluid lines and pressure fluid leading component |
DE102009028795A1 (en) * | 2009-08-21 | 2011-02-24 | Robert Bosch Gmbh | High-pressure fuel pump |
DE102014213729A1 (en) * | 2014-07-15 | 2016-01-21 | Robert Bosch Gmbh | Connecting piece and high pressure pump with connection piece |
DE102015216150A1 (en) * | 2015-08-25 | 2017-03-02 | Volkswagen Aktiengesellschaft | Sealing arrangement for a fuel supply line |
DE102016212456A1 (en) * | 2016-07-08 | 2018-01-11 | Robert Bosch Gmbh | High-pressure fuel pump |
DE102016219112A1 (en) * | 2016-09-30 | 2018-04-05 | Robert Bosch Gmbh | High-pressure fuel pump |
-
2018
- 2018-10-01 DE DE102018216850.4A patent/DE102018216850A1/en not_active Withdrawn
-
2019
- 2019-09-12 EP EP19769434.2A patent/EP3861207A1/en not_active Withdrawn
- 2019-09-12 WO PCT/EP2019/074334 patent/WO2020069833A1/en unknown
- 2019-09-12 CN CN201980064975.1A patent/CN112771268A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102018216850A1 (en) | 2020-04-02 |
WO2020069833A1 (en) | 2020-04-09 |
CN112771268A (en) | 2021-05-07 |
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Legal Events
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