EP3818261A1 - Pompe à carburant - Google Patents

Pompe à carburant

Info

Publication number
EP3818261A1
EP3818261A1 EP19725151.5A EP19725151A EP3818261A1 EP 3818261 A1 EP3818261 A1 EP 3818261A1 EP 19725151 A EP19725151 A EP 19725151A EP 3818261 A1 EP3818261 A1 EP 3818261A1
Authority
EP
European Patent Office
Prior art keywords
pump
fuel
low
connection
pressure
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Withdrawn
Application number
EP19725151.5A
Other languages
German (de)
English (en)
Inventor
Stefan Kolb
Florian Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3818261A1 publication Critical patent/EP3818261A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M59/025—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 a single 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
    • 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
    • F02M59/48—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus

Definitions

  • the invention relates to a fuel pump according to the preamble of claim 1.
  • Fuel pumps are also known, for example, from EP 2 541 039 A1. Disclosure of the invention
  • the invention is based on the knowledge of the inventors that, in pumps with at least two low-pressure connections to these low-pressure connections, different functional requirements have to be made, for example, different depending on the application
  • first connection piece and the second connection piece are provided as parts which are identical to one another and which are fastened to the pump housing, and that in the second
  • the second low-pressure connection can be adapted to the specific application with little effort thanks to its modular structure.
  • the outlet is designed as a third connecting piece, which is identical to the first connecting piece and the second connecting piece.
  • the throttle part can for example be designed as a sleeve and
  • At least halve the flow cross-section of the second low-pressure connection ie reduce it to a value that is less than half the initial value.
  • the pump housing can consist of a pump body and a pump cover mounted on the pump body.
  • the first connection piece and the second connection piece can be fastened radially to the pump body.
  • Connecting piece is attached to the pump cover; or that the second
  • Connector is attached radially to the pump body and the first
  • Connection piece is attached to the pump cover.
  • Figure 1 is a schematic representation of a fuel system for a
  • Figure 2 shows a fuel pump according to the invention in an overall view
  • Figure 3 shows the pump of Figure 2 in a longitudinal section
  • Figure 4 shows the pump of Figure 2 in a longitudinal section perpendicular to Figure 3;
  • Figure 5 shows the second low pressure connection of the pump of Figure 2 in detail.
  • FIG. 1 shows a fuel system 10 for an internal combustion engine in a simplified schematic representation. From a fuel tank 12, fuel is supplied via a suction line 14, by means of a prefeed pump 16 Low-pressure line 18, via a first low-pressure connection 20 to a high-pressure fuel pump 28.
  • a fuel for example gasoline, is compressed to a high pressure in the high-pressure fuel pump 28 and fed via a high-pressure rail 32 and a high-pressure injector 34 to a combustion chamber 36 of the internal combustion engine, where it mixes with air supplied via an intake manifold 38 and subsequently, for example by means of a spark generated with a spark plug is ignited.
  • Low-pressure injector 37 into the above-mentioned intake manifold 38, where it already mixes with the supplied air before it reaches the combustion chamber 36 of the internal combustion engine.
  • Low-pressure connection 21 comes out of the high-pressure fuel pump 28, a flow of fuel through the high-pressure fuel pump 28 is ensured even if no compressed fuel is discharged via the outlet 90 of the high-pressure fuel pump.
  • the second low-pressure connection 21 can therefore also be referred to as the flushing connection of the high-pressure fuel pump 28.
  • the high-pressure fuel pump 28 is designed as a piston pump, wherein a piston 30 can be moved vertically in the drawing by means of a cam disk 31.
  • a first connection piece 80 which forms the first low-pressure connection 20, is fastened to the high-pressure fuel pump 28.
  • the fuel high-pressure pump 28 shown only schematically in FIG. 1 is shown in detail in different views in FIGS. 2 to 4.
  • the high-pressure fuel pump 28 shown as an example has one
  • Pump housing 40 which consists of a pump body 41 and a pump cover 42, for example, non-detachably mounted thereon.
  • the pump body 41 and the pump cover 42 can be connected to one another, for example, by means of a weld seam.
  • a first connection piece 80, a second connection piece 81, an outlet 90 in the form of a third connection piece 82 and a quantity control valve 46 are, for example, permanently attached to the side of the pump body 41.
  • the quantity control valve 46 has the function of a controllable inlet valve of the high-pressure fuel pump 28.
  • a fluidic connection between the low-pressure space 43 arranged below the pump cover 42 and the connecting piece 80 is established by a first connecting bore 51 running in the axial direction in the pump body 41.
  • a second connecting bore which also runs in the axial direction in the pump body 41, connects the low-pressure chamber 43 to the inlet side of the quantity control valve 46.
  • the quantity control valve 46 opens to the delivery space 44 or closes in the opposite direction.
  • the piston 30 is compressed by an upward movement of the medium and is conveyed via the outlet valve 48 opening away from the delivery chamber 44 and the outlet 90, for example, to a high-pressure rail 32.
  • a pressure relief valve 49 is connected antiparallel to the outlet valve 48 in order to prevent impermissibly high pressures in the high pressure region of the
  • a stepped space bore 53 connects the low-pressure space 43 to a compensation space 57 arranged below the pump body 41, which is delimited on its underside by a seal carrier 25 fastened to the pump body 41.
  • Connection piece 81 and the third connection piece 82 are identical parts, that is to say are produced in the same way.
  • a sleeve-shaped throttle part 75 is pressed into the second connecting piece 81, i.e. a throttle part 75 designed as a sleeve, the outer diameter 75A of which has an oversize in comparison to the inner diameter 811 of the second connecting piece 81, is introduced into the second connecting piece 81 and is at least frictionally fixed there.
  • the inner diameter 751 of the throttle part 75 can for example be half as large as an inner diameter of the second connecting piece 811 or even smaller.

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

L'invention concerne une pompe à carburant (28) destinée au système de carburant (10) d'un moteur à combustion interne, la pompe à carburant (28) présentant une chambre d'alimentation (44) agencée dans un carter (40) de pompe et délimitée par un piston (30) de pompe déplaçable en direction axiale, la pompe à carburant (28) présentant une soupape d'entrée (46) qui s'ouvre à partir d'une chambre basse pression (43) vers la chambre d'alimentation (44), et la pompe à carburant (28) présentant une soupape de sortie (48) qui s'ouvre à partir de la chambre d'alimentation (44) en direction d'une sortie (90). Sur le carter (40) de pompe est situé un premier raccordement basse pression (20) qui permet au carburant de parvenir dans la chambre basse pression (43) et/ou de sortir de la chambre basse pression (43), sur le carter (40) de pompe est par ailleurs situé un second raccordement basse pression (21) qui permet au carburant de parvenir dans la chambre basse pression (43) et/ou de sortir de la chambre basse pression (43), le premier raccordement basse pression (20) étant réalisé sous la forme d'une première tubulure de raccordement (80) située sur le carter (40) de pompe, et le second raccordement basse pression (21) étant formé par une seconde tubulure de raccordement (81) située sur le carter (40) de pompe. L'invention est caractérisée en ce que la première tubulure de raccordement (80) et la seconde tubulure de raccordement (81) sont réalisées sous la forme de pièces de conception identique qui sont fixées au carter (40) de pompe, et en ce qu'un élément d'étranglement (75) est enfoncé dans la seconde tubulure de raccordement (81).
EP19725151.5A 2018-07-07 2019-05-17 Pompe à carburant Withdrawn EP3818261A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018211237.1A DE102018211237A1 (de) 2018-07-07 2018-07-07 Kraftstoffpumpe
PCT/EP2019/062819 WO2020011429A1 (fr) 2018-07-07 2019-05-17 Pompe à carburant

Publications (1)

Publication Number Publication Date
EP3818261A1 true EP3818261A1 (fr) 2021-05-12

Family

ID=66597614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19725151.5A Withdrawn EP3818261A1 (fr) 2018-07-07 2019-05-17 Pompe à carburant

Country Status (5)

Country Link
EP (1) EP3818261A1 (fr)
KR (1) KR20210028642A (fr)
CN (1) CN112368474A (fr)
DE (1) DE102018211237A1 (fr)
WO (1) WO2020011429A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020208847A1 (de) 2020-07-15 2022-01-20 Robert Bosch Gesellschaft mit beschränkter Haftung Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine
DE102020211798A1 (de) 2020-09-22 2022-03-24 Robert Bosch Gesellschaft mit beschränkter Haftung Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035221A (en) * 1989-01-11 1991-07-30 Martin Tiby M High pressure electronic common-rail fuel injection system for diesel engines
JP3813370B2 (ja) * 1999-01-13 2006-08-23 トヨタ自動車株式会社 流体ポンプ
DE102009000857A1 (de) * 2009-02-13 2010-08-19 Robert Bosch Gmbh Pumpenanordnung
DE102009003054A1 (de) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Hochdruckpumpe
JP5401360B2 (ja) 2010-02-26 2014-01-29 日立オートモティブシステムズ株式会社 高圧燃料供給ポンプ
DE102013204327A1 (de) * 2013-03-13 2014-09-18 Robert Bosch Gmbh Zylinderkopfrohteil, Zylinderkopf und Hochdruckpumpe für Brennstoffeinspritzanlagen
DE102015219415B4 (de) * 2015-10-07 2020-07-09 Vitesco Technologies GmbH Kraftstoffhochdruckpumpe sowie Kraftstoffversorgungseinrichtung für eine Verbrennungskraftmaschine, insbesondere eines Kraftwagens
JP6569480B2 (ja) * 2015-11-05 2019-09-04 株式会社デンソー 高圧ポンプ

Also Published As

Publication number Publication date
WO2020011429A1 (fr) 2020-01-16
DE102018211237A1 (de) 2020-01-09
KR20210028642A (ko) 2021-03-12
CN112368474A (zh) 2021-02-12

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