WO2015022094A1 - Pompe haute pression - Google Patents

Pompe haute pression Download PDF

Info

Publication number
WO2015022094A1
WO2015022094A1 PCT/EP2014/060352 EP2014060352W WO2015022094A1 WO 2015022094 A1 WO2015022094 A1 WO 2015022094A1 EP 2014060352 W EP2014060352 W EP 2014060352W WO 2015022094 A1 WO2015022094 A1 WO 2015022094A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
pressure pump
return
fluid
pump
Prior art date
Application number
PCT/EP2014/060352
Other languages
German (de)
English (en)
Inventor
Thomas Schmidbauer
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2015022094A1 publication Critical patent/WO2015022094A1/fr

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
    • F02M59/02—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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M59/442—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 means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M63/0054—Check valves

Definitions

  • the invention relates to a high-pressure pump for conveying a fluid with a return channel.
  • the object underlying the invention is to provide a reliable high-pressure pump at high pump pressures.
  • the invention is characterized by a high-pressure pump for conveying a fluid.
  • the high-pressure pump has a housing part with a housing recess. In the housing recess, a pump unit with a high pressure piston is partially arranged ⁇ .
  • the high-pressure pump has a seal which is arranged radially outside the high-pressure piston such that it seals a first region of the housing recess in a fluid-tight manner from a second region of the housing recess.
  • the first region of the housing recess comprises a high-pressure chamber and a return chamber adjoining the seal.
  • the high pressure pump has a return channel, which connects the return chamber with an inlet of the high pressure pump.
  • the return channel has a check valve which is designed to To prevent backflow of the fluid from the inlet of the high-pressure pump via the return channel to the return chamber.
  • High-pressure pumps are designed for very high pressures, for example high-pressure pumps for pumping fuel in the vehicle are designed to produce gasoline pressures of up to 200 bar and diesel pressures of up to 2500 bar.
  • leakage of the fluid from the high pressure chamber to the return chamber may occur.
  • the return chamber is connected to the inlet via the return channel.
  • pressure fluctuations on the side of the inlet can occur, for example, when a supply valve closes. These pressure fluctuations can act on a high-pressure pump without check valve via the return passage directly on the seal.
  • By attaching the check valve in the return channel these pressure fluctuations can be easily damped, so that such pressure fluctuations can not or only partially affect the seal of the high-pressure piston. This can contribute to preventing the fluid from passing from the first region through such a pressure fluctuation past the seal in the second region.
  • the second region for example, there is another fluid, such as an oil for lubrication, which must not be mixed with the fluid from the first region.
  • another fluid such as an oil for lubrication
  • the check valve has a non-return valve.
  • a non-return valve By a non-return valve, a check valve with a very high dynamics can be generated.
  • the check valve on a leaf valve is a leaf valve.
  • the check valve on an elastic material.
  • Such elastic materials are, for example, materials which have a rubber content. Especially by elastic materials high dynamics can be achieved in the check valve.
  • the high-pressure pump is a high-pressure fuel pump.
  • Figure 1 is a high-pressure pump
  • FIG. 1 shows a high-pressure pump 1 with a housing part 10.
  • the high-pressure pump 1 is, for example, a high-pressure pump 1 for conveying fuel in the vehicle. For example, it is designed to produce gasoline pressures up to 200 bar and / or diesel pressures up to 2500 bar.
  • a housing recess 13 In the housing part 10 is a housing recess 13. In the housing recess 13, a pump unit with a high-pressure piston 15 is arranged.
  • the pump unit is, for example, connected to a drive shaft, not shown, such as a camshaft, or in operative connection with the drive shaft.
  • a drive shaft not shown, such as a camshaft, or in operative connection with the drive shaft.
  • the high-pressure piston 15 can be moved in a longitudinal direction.
  • a seal 17 is arranged, which seals a first region 19 of the housing recess 13 from a second region 21 of the housing recess 13 in a fluid-tight manner.
  • the seal 17 is for example a rod ⁇ seal.
  • the first region 19 of the housing recess 13 comprises a high-pressure chamber 23.
  • the high-pressure chamber 23 extends from an axial end of the high-pressure piston 15 to an end of the housing recess 13 opposite the axial end of the high-pressure piston 15.
  • the high pressure piston 15 is linearly movable between a lower and a top dead center. As a result, the size of the high-pressure chamber 23 changes accordingly, so that a pressure can be built up in it.
  • the first region 19 of the housing recess 13 additionally comprises a return chamber 25 adjoining the seal 17.
  • the high-pressure pump 1 has an inlet valve 35 to the high-pressure chamber 23.
  • the inlet valve 35 is, for example, a digital inlet valve. By means of the inlet valve 35, a fluid flow from an inlet 33 into the high-pressure chamber 23 can be controlled.
  • the high-pressure pump 1 also has an outlet valve 39, such as a spring-loaded check valve, by means of which the fluid can pass from the high-pressure chamber 23 to an outlet 37.
  • the high-pressure pump 1 has a return channel 30 which connects the return chamber 25 with the inlet 33 of the high-pressure pump 1. During a compression stroke of the high pressure piston 15, fluid at the high pressure piston 15 can pass from the high pressure chamber 23 into the return chamber 25.
  • This leakage can pass through the return channel 30 back to the inlet 33, for example by suction.
  • the return passage 30 has a check valve 31, which is designed to prevent a backflow of the fluid from the inlet 33 of the high-pressure pump 1 via the return passage 30 to the return chamber 25.
  • the check valve 31 has, for example, a non-return valve. Alternatively or additionally, the check valve 31 on a leaf valve.
  • the check valve 31 includes, for example, an elastic material.
  • the function of the high-pressure pump 1 is to be represented by means of the pressure profile shown in FIG. 2 on the side of the inlet 33 during a pumping operation:
  • the high-pressure piston 15 is moved from a top dead center TP1 to a bottom dead center TP2.
  • the high-pressure chamber 23 is filled with fluid at an open inlet valve 35 from the inlet 33, which is connected for example to a tank, whereby the fluid pressure at the inlet 33 decreases.
  • the high-pressure pump 1 is, for example, a high-pressure fuel pump of an injection insert of an internal combustion engine, the fluid subjected to the high pressure can reach a high-pressure fuel reservoir, the so-called common rail.
  • the inlet valve 35 in the closing point SP Prior to closing the inlet valve 35 in the closing point SP may optionally fluid back into the inlet 33 pass whereby the fluid pressure increases on the inlet side. After closing the inlet valve 35 in the closing point SP, a pressure fluctuation as shown in FIG. 2 can arise on the side of the inlet 33.
  • the check valve 31 located in the return channel 30 these pressure fluctuations can be damped so that they can not act or only partially on the seal 17 of the high-pressure piston 15.
  • a return channel without check valve 31 can be due to these pressure fluctuations fluid from the first area 19 past the seal 17 into the second region 21.
  • the second region 21 in which, for example, the drive shaft is often lubricated with an oil. If fuel now flows from the first region 19 into the second region 21, then optionally one can

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Pompe haute pression (1) destinée au refoulement d'un fluide, qui comporte une partie carter (10) pourvue d'un évidement (13), ainsi qu'une unité pompe située partiellement dans l'évidement (13) du carter et pourvue d'un piston haute pression (15). Ladite pompe haute pression (1) comporte un joint d'étanchéité (17) situé radialement à l'extérieur du piston haute pression (15) de manière telle qu'il sépare de manière étanche une première zone (19) de l'évidement (13) d'une seconde zone (21) de l'évidement (13). La première zone (19) de l'évidement (13) comporte une chambre haute pression (23) et une chambre de retour (25) adjacente au joint d'étanchéité (17). Ladite pompe haute pression (1) comporte un conduit de retour (30) qui relie la chambre de retour (25) à un conduit d'amenée (33) de la pompe haute pression (1), ledit conduit de retour (30) comportant une soupape de non-retour (31) conçue pour empêcher un retour du fluide du conduit d'amenée (33) de la pompe haute pression (1) vers la chambre de retour (25) via le canal de retour (30).
PCT/EP2014/060352 2013-08-13 2014-05-20 Pompe haute pression WO2015022094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013215956.0A DE102013215956A1 (de) 2013-08-13 2013-08-13 Hochdruckpumpe
DE102013215956.0 2013-08-13

Publications (1)

Publication Number Publication Date
WO2015022094A1 true WO2015022094A1 (fr) 2015-02-19

Family

ID=50771275

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/060352 WO2015022094A1 (fr) 2013-08-13 2014-05-20 Pompe haute pression

Country Status (2)

Country Link
DE (1) DE102013215956A1 (fr)
WO (1) WO2015022094A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3306071A1 (fr) * 2016-10-10 2018-04-11 Robert Bosch GmbH Pompe haute pression de type plongeur piston et ensemble à haute pression et son manchon de plongeur
GB2568542A (en) * 2017-11-21 2019-05-22 Delphi Tech Ip Ltd High pressure pump with plunger seal protection
WO2020114711A1 (fr) * 2018-12-04 2020-06-11 Robert Bosch Gmbh Pompe, en particulier pompe à carburant à haute pression pour dispositif d'injection de carburant d'un moteur à combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021004283A1 (de) 2021-08-21 2023-02-23 Kastriot Merlaku Hochdruckpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322603A1 (de) * 2003-05-20 2004-12-09 Robert Bosch Gmbh Kolbenpumpe, insbesondere Hochdruck-Kolbenpumpe für Brennkraftmaschinen mit Direkteinspritzung
DE102008059117A1 (de) * 2008-11-26 2010-06-02 Continental Automotive Gmbh Hochdruckpumpenanordnung
DE102011007781A1 (de) * 2011-04-20 2012-10-25 Continental Automotive Gmbh Steckpumpe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010039211A1 (de) * 2010-08-11 2012-02-16 Robert Bosch Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322603A1 (de) * 2003-05-20 2004-12-09 Robert Bosch Gmbh Kolbenpumpe, insbesondere Hochdruck-Kolbenpumpe für Brennkraftmaschinen mit Direkteinspritzung
DE102008059117A1 (de) * 2008-11-26 2010-06-02 Continental Automotive Gmbh Hochdruckpumpenanordnung
DE102011007781A1 (de) * 2011-04-20 2012-10-25 Continental Automotive Gmbh Steckpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3306071A1 (fr) * 2016-10-10 2018-04-11 Robert Bosch GmbH Pompe haute pression de type plongeur piston et ensemble à haute pression et son manchon de plongeur
GB2568542A (en) * 2017-11-21 2019-05-22 Delphi Tech Ip Ltd High pressure pump with plunger seal protection
WO2020114711A1 (fr) * 2018-12-04 2020-06-11 Robert Bosch Gmbh Pompe, en particulier pompe à carburant à haute pression pour dispositif d'injection de carburant d'un moteur à combustion interne

Also Published As

Publication number Publication date
DE102013215956A1 (de) 2015-02-19

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