EP3054150A1 - Soupape de decharge pour pompe a haute pression et pompe haute pression - Google Patents

Soupape de decharge pour pompe a haute pression et pompe haute pression Download PDF

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Publication number
EP3054150A1
EP3054150A1 EP15200800.9A EP15200800A EP3054150A1 EP 3054150 A1 EP3054150 A1 EP 3054150A1 EP 15200800 A EP15200800 A EP 15200800A EP 3054150 A1 EP3054150 A1 EP 3054150A1
Authority
EP
European Patent Office
Prior art keywords
housing
valve
overflow valve
valve body
inlet opening
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
Application number
EP15200800.9A
Other languages
German (de)
English (en)
Other versions
EP3054150B1 (fr
Inventor
Marina Palumbo
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 EP3054150A1 publication Critical patent/EP3054150A1/fr
Application granted granted Critical
Publication of EP3054150B1 publication Critical patent/EP3054150B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • 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
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"

Definitions

  • the invention relates to an overflow valve for a high pressure pump in a fuel injection system of an internal combustion engine with the features of the preamble of claim 1. Furthermore, the invention relates to a high pressure pump with such a spill valve.
  • An overflow valve for a high-pressure pump in a fuel injection system is usually used to limit the pressure and / or to reduce pressure pulsations in the region of the inlet of the high-pressure pump.
  • the arrangement must therefore be made in such a way that the overflow valve is acted on the input side of the inlet pressure.
  • a connection On the output side, a connection must be provided to dissipate the amount of tax deducted.
  • an overflow valve for a fuel pump which comprises a housing and a valve body screwed into the housing.
  • the overflow valve can be inserted into a pump housing of a fuel pump.
  • the housing can also be formed by the pump housing of the fuel pump.
  • the arrangement of the overflow valve takes place in such a way that a supply bore of the housing is in communication with an inlet nozzle of the pump.
  • the spill valve is connected to a channel in the housing, which opens into a return pipe of the pump.
  • connection for overflow valves are known from the prior art.
  • a T-shaped adapter piece which is preferably used in a feed line and has a branch from the feed line, the input-side connection of an overflow valve can be realized.
  • the present invention seeks to provide an overflow valve for a high pressure pump in a fuel injection system of an internal combustion engine, which simplifies the required connection to an inlet and / or a return of a high-pressure pump. Furthermore, the spill valve should be simple and inexpensive to produce.
  • the overflow valve proposed for a high-pressure pump in a fuel injection system of an internal combustion engine comprises a housing and a valve body accommodated at least partially in the housing, the valve body having a central bore in which a valve piston is axially connected to connect an inlet opening formed in the housing to an outlet opening formed in the valve body slidably guided.
  • the valve piston is acted upon in the direction of the inlet opening by the spring force of a valve spring.
  • the inlet opening and the outlet opening are each formed on the front side in the housing or in the valve body. Accordingly, the overflow valve is not only flowed in axially, but the amount of removal that is to be discharged is also discharged in the axial direction via the end outlet opening in the valve body.
  • the inlet port and / or the outlet port is coaxially disposed with respect to a longitudinal axis of the central bore.
  • the production of the overflow valve is further simplified.
  • the flow through the overflow valve is optimized.
  • the flow channel is limited in the direction of the inlet opening by a control edge, which lies in the region of the guidance of the valve piston. Only when the valve piston passes over the control edge, a connection of the inlet opening is made with the outlet opening. On the position of the control edge can therefore be adjusted when the spill valve opens. The movement of the valve piston before the actual opening serves to damp pressure pulsations.
  • a plurality of axially extending flow channels are provided for connecting the inlet opening with the outlet opening, which are arranged at the same angular distance from each other.
  • the valve piston is thus flowed around evenly when the overflow valve opens.
  • the valve body has a hollow-cylindrical projection for forming an outlet channel, which connects the outlet opening with the central bore.
  • the overflow valve can be easily connected to a return line via the hollow cylindrical projection, so that the connection to the return is further simplified.
  • the hollow cylindrical projection may have an external thread, at least one circumferential bead and / or a groove for non-positive and / or positive connection with a return line. As a result, the seat of the return line is improved on the hollow cylindrical approach.
  • the outlet channel has a reduced inner diameter relative to the central bore, so that a shoulder is formed within the central bore for supporting the valve spring.
  • the housing has a hollow-cylindrical projection for forming an inlet channel which connects the inlet opening with the central bore.
  • the hollow-cylindrical projection forming the inlet channel and thus the inlet opening can be connected in a simple manner with a T-shaped adapter piece, so that the connection to the inlet is simplified by this measure.
  • the housing may have an inlet channel designed as a bore, which opens into a feed channel formed in the housing.
  • This design of the housing makes a T-shaped adapter unnecessary, so that the construction of the spill valve is further simplified.
  • the inlet channel extends transversely to the inlet channel, so that a T-shaped adapter piece is modeled by the housing.
  • the inlet channel formed in the housing is formed at least at one end by a side of the housing arranged nozzle.
  • the stub facilitates the connection to a supply line, so that ideally both ends of the inlet channel are formed nozzle-shaped.
  • the housing and the valve body are non-positively and / or positively connected.
  • the valve body is held captive in the housing.
  • a certain seal is achieved.
  • the non-positive and / or positive connection is realized by a plug-in, screw and / or press connection.
  • At least one sealing ring is disposed between the valve body and the housing.
  • the overflow valve according to the invention can be an independent component, which is used in the region of the inlet of a high-pressure pump in a supply line.
  • the overflow valve according to the invention can also be an integral part of a high-pressure pump.
  • Fig. 1 illustrated overflow valve comprises a valve body 2 with a central bore 3, in which a valve piston 6 is guided along a longitudinal axis 8 of the central bore 3 slidably.
  • a valve piston 6 In the region of the guide flow channels 9 are formed, which are each bounded by a control edge 11.
  • the valve body 2 a total of three flow channels 9, which are each formed as longitudinal grooves and arranged at the same angular distance from each other.
  • a valve spring 7 is accommodated, which is supported on the one hand on the valve piston 6 and on the other hand on a shoulder 14 of the valve body 2.
  • the valve body 2 is screwed into a housing 1.
  • a sealing ring 21 is inserted between the valve body 2 and the housing 1.
  • the housing 1 has a hollow cylindrical projection 15, which forms an inlet channel 16 with an inlet opening 4.
  • the hollow cylindrical projection 15 can be connected to a T-shaped adapter piece 22, which serves to connect a supply line (not shown). Accordingly, the pressure prevailing in the supply line is also present at the end face of the valve piston 6 facing the inlet channel 16. If this exceeds a predetermined limit value, the valve piston 6 is displaced counter to the spring force of the valve spring 7 in the direction of the shoulder 14. As the control edges 11 pass over, the valve piston 6 releases the flow channels 9, so that a connection of the inlet opening 4 with an outlet opening 5 defines the end of an outlet channel 13 which is formed by a hollow cylindrical projection 12 of the valve body 2.
  • the inlet channel 16 with the inlet opening 4 and the outlet channel 13 with the outlet opening 5 are each arranged coaxially to the longitudinal axis 8. In the open position of the overflow valve, this therefore flows through axially.
  • the axially extending exhaust passage 13 replaces radially extending Abêtbohrungen, which are usually formed in the valve body 2 for discharging the Ab tenumenge. This eliminates the need to form an annular channel between the valve body 2 and the housing 1, via which the Abschmenge collected can be fed to a return port.
  • the hollow-cylindrical projection 12 forming the outlet channel 13 facilitates the connection of a return line (not shown), since it forms a type of connection piece.
  • Fig. 3 is a modification of the embodiment of the Fig. 1 shown, which differs in that in the central bore 3, a sleeve 10 is inserted.
  • the sleeve 10 serves to guide the valve piston 6. Accordingly, the flow channels 9 are formed in the sleeve 10 (see Fig. 4 ).
  • a further preferred embodiment of the invention shows the Fig. 5 ,
  • the housing 1 instead of a hollow-cylindrical projection 15, the housing 1 has a bore for forming an inlet channel 17.
  • the inlet channel 17 opens into an inlet channel 18 which extends transversely to the inlet channel 17.
  • the inlet channel 18 is formed by nozzles 19, 20, which are attached laterally to the housing 1.
  • the T-shaped adapter piece 22 is therefore unnecessary. Incidentally, this corresponds to the Fig. 5 illustrated overflow valve the Fig. 1 ,
  • the Fig. 6 shows a modification of the embodiment of the Fig. 5 in which again a sleeve 10 is used. Otherwise, the overflow valve corresponds to the Fig. 6 the the Fig. 5 ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
EP15200800.9A 2015-02-05 2015-12-17 Soupape de decharge pour pompe a haute pression et pompe haute pression Active EP3054150B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015202022.3A DE102015202022A1 (de) 2015-02-05 2015-02-05 Überströmventil für eine Hochdruckpumpe sowie Hochdruckpumpe

Publications (2)

Publication Number Publication Date
EP3054150A1 true EP3054150A1 (fr) 2016-08-10
EP3054150B1 EP3054150B1 (fr) 2019-02-27

Family

ID=54936847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15200800.9A Active EP3054150B1 (fr) 2015-02-05 2015-12-17 Soupape de decharge pour pompe a haute pression et pompe haute pression

Country Status (2)

Country Link
EP (1) EP3054150B1 (fr)
DE (1) DE102015202022A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016218407A1 (de) 2016-09-26 2018-03-29 Schaeffler Technologies AG & Co. KG Hydraulisches Schaltelement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR797444A (fr) * 1934-12-05 1936-04-27 Belfrost Diesels Ltd Perfectionnements apportés aux systèmes d'injection de combustible
US2234932A (en) * 1937-11-20 1941-03-11 Timken Roller Bearing Co Fuel injection delivery valve
US2352322A (en) * 1942-01-02 1944-06-27 Ex Cell O Corp Pressure reduction check valve
DE2651586B1 (de) * 1976-11-12 1978-04-27 Maschf Augsburg Nuernberg Ag Befestigung eines ringfoermigen Widerlagers fuer die Schliessfeder eines Ventils einer Kraftstoffeinspritzpumpe fuer Brennkraftmaschinen
DE102012221543A1 (de) * 2012-11-26 2014-05-28 Robert Bosch Gmbh Ventileinrichtung
DE102013200050A1 (de) 2013-01-03 2014-07-03 Robert Bosch Gmbh Überströmventil für eine Kraftstoffpumpe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19535368C2 (de) * 1995-09-25 1998-04-30 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR797444A (fr) * 1934-12-05 1936-04-27 Belfrost Diesels Ltd Perfectionnements apportés aux systèmes d'injection de combustible
US2234932A (en) * 1937-11-20 1941-03-11 Timken Roller Bearing Co Fuel injection delivery valve
US2352322A (en) * 1942-01-02 1944-06-27 Ex Cell O Corp Pressure reduction check valve
DE2651586B1 (de) * 1976-11-12 1978-04-27 Maschf Augsburg Nuernberg Ag Befestigung eines ringfoermigen Widerlagers fuer die Schliessfeder eines Ventils einer Kraftstoffeinspritzpumpe fuer Brennkraftmaschinen
DE102012221543A1 (de) * 2012-11-26 2014-05-28 Robert Bosch Gmbh Ventileinrichtung
DE102013200050A1 (de) 2013-01-03 2014-07-03 Robert Bosch Gmbh Überströmventil für eine Kraftstoffpumpe

Also Published As

Publication number Publication date
DE102015202022A1 (de) 2016-08-11
EP3054150B1 (fr) 2019-02-27

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