EP0143296B1 - Druckventil für Kraftstoffeinspritzpumpen - Google Patents

Druckventil für Kraftstoffeinspritzpumpen Download PDF

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Publication number
EP0143296B1
EP0143296B1 EP19840112337 EP84112337A EP0143296B1 EP 0143296 B1 EP0143296 B1 EP 0143296B1 EP 19840112337 EP19840112337 EP 19840112337 EP 84112337 A EP84112337 A EP 84112337A EP 0143296 B1 EP0143296 B1 EP 0143296B1
Authority
EP
European Patent Office
Prior art keywords
valve
plug
closing member
delivery
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.)
Expired
Application number
EP19840112337
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0143296A2 (de
EP0143296A3 (en
Inventor
Erich Dischinger
Martin Sinz
Horst Dipl.-Ing. Toberer (Fh)
Karl Zibold
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 EP0143296A2 publication Critical patent/EP0143296A2/de
Publication of EP0143296A3 publication Critical patent/EP0143296A3/de
Application granted granted Critical
Publication of EP0143296B1 publication Critical patent/EP0143296B1/de
Expired legal-status Critical Current

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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
    • 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

Definitions

  • the invention is based on a pressure valve according to the preamble of the main claim.
  • a pressure valve which has a valve closing member, on which a cap is placed on the side of the compression spring, within which the closing member of the check valve and its return spring are located.
  • This attached cap engages around a pin-shaped part of the valve closing member and has a snap connection with it.
  • the attached cap which, like the valve closing element of the check valve, is acted upon by the pressures of the reflected pressure waves, allows fuel to pass through at its connection to the valve closing element, provided that this connection is not completely tight.
  • the known pressure valve also has the disadvantage that the desired stand pressure of the check valve has to be set with the aid of washers which have to be inserted between the return spring and the support. This also requires an expensive assembly and adjustment effort.
  • a pressure valve of the generic type is known from GB-A-566957.
  • this pressure valve an internal thread is provided in the enlarged diameter part of the cylindrical longitudinal bore in the pressure valve closing member, into which the plug is screwed.
  • this has a collar with which it comes to rest against the outlet-side end face of the pressure valve closing member when screwing in.
  • This configuration has the disadvantage that, because of the collar and the larger wall thickness of the valve closing member that is necessary because of the thread, the valve closing member has a relatively large mass in the region of the longitudinal channel, which influences a rapid reaction when the pressure changes. Furthermore, this configuration represents a relatively high outlay for the manufacture and assembly of the pressure valve closing member.
  • a plug of this type must be secured in the screw-in position so that the pretension of the return spring of the check valve does not change during operation of the pressure valve and thus also the one to be set exactly Opening pressure that determines the holding pressure in the pressure output between the injection valve and pressure valve.
  • Known means for securing are to glue the plug to the pressure valve closing member via its threads, to weld it or to connect it by clamping or bracing.
  • the collar provided in the prior art lends itself to such bracing. This also represents a considerable effort when installing the pressure valve, in particular because the pretension of the return spring of the pressure valve must be set exactly.
  • the pressure valve according to the invention with the characterizing features of the main claim has the advantage that the valve closing member of the pressure valve has a very simple structure, that there is no need for a complicatedly shaped cap or a thread overlapping the valve closing member for the introduction of a stopper serving as an abutment for the return spring of the check valve and that above all the stand pressure of the check valve is continuously adjustable and precisely adjustable. This results in significantly lower manufacturing costs with a safe function of the check valve, low mass of the valve closing member and the most precise setting option.
  • the figure shows a longitudinal section through a pressure valve 1, which is screwed into the housing 2 of a fuel injection pump, not shown, and sits in a delivery line 4 between the pump work chamber, not shown, of the fuel injection pump and an injection valve 3 of the internal combustion engine to be supplied, not shown.
  • the pressure valve has a connecting piece 5 which is screwed into a threaded bore 7 of the housing 2.
  • the connecting piece has an axial cylindrical recess 8 which is open towards the screw-in side and essentially has the shape of a blind hole. Coaxial to the cylindrical recess 8 there is a connection bore 6, which opens into a connection nipple 11 of the connecting piece and connects the recess 8 to the delivery line 4.
  • a tubular valve body 9 is inserted into the axial recess 8, which has a collar 10 at its pump-side end, by means of which it is held on a shoulder 12 of the threaded bore 7 by the pump-side end face 13 of the connecting piece.
  • the delivery line 4 leads from the pump-side end of the threaded bore 7 to the pump work space.
  • the tubular valve body has a valve seat 14, on which a conical sealing surface 15 of a valve closing member 16 of the pressure valve is used for contact ge comes.
  • the valve closing member has, in a known manner, wing-shaped guide surfaces 17 which are guided in the inner bore 19 of the valve body 9 and between which fuel can pass to the valve seat.
  • a pressure spring 20 engages on a shoulder 22 of the valve closing member projecting into the part of the recess 8 on the connection bore side, which is supported on the other hand via a spring plate 21 on the end of the recess 8 on the connection bore side.
  • the valve closing member 16 also has a longitudinal channel 23, which is connected on the pump side via a transverse bore 24 to the inner bore 19 and, on the other hand, opens into a cylindrical longitudinal bore 26 of larger diameter, which is located in the region of a guide pin 28 which is connected to the shoulder 22 extends into the axial recess 8 and also serves to guide the compression spring 20.
  • the longitudinal bore 26 is closed by a stopper 29 which is pressed in there.
  • the stopper has a passage opening 30 which widens towards the inside of the longitudinal bore 26 to form a valve seat 31, which serves for the abutment of a spherical closing element 32 of a check valve 33.
  • the closing member 32 is mounted in a spring plate 34, between which and the end of the longitudinal bore 26 a return spring 35 is clamped.
  • valve closing member 16 is opened under the pressure of the fuel supplied via the delivery line 4.
  • the valve closing member returns to its valve seat 14.
  • the injection valve closes at the end of the delivery line.
  • pressure waves run back and forth in the enclosed volume between the pressure valve and the injection valve, which are able to open the injection valve again briefly at a later point in time.
  • the pressure level in the delivery line can also be reduced after the valve closing member has been closed, to a stand pressure which is determined by the pretension of the return spring of the check valve.
  • the standing pressure of the check valve can now be set extremely precisely by pressing the plug 29 in more or less far. There is no need to insert washers in increments between the return spring and its support on the valve closing element and after this process measure the opening pressure again until the desired value is reached. Due to the design described, any connection from the pressure side in the delivery pressure line 4 to the pump-side delivery line 4 is interrupted after the check valve is closed. The longitudinal channel 23 is lightly closed to the axial cylindrical recess.
  • the pressure valve described can be produced in a very simple manner with only little additional effort compared to a pressure valve without a check valve.
  • FIG. 2 shows a second exemplary embodiment of the pressure valve with respect to its essential parts which differ from FIG. 1.
  • the plug 29 ′ has an annular groove 37 on its cylindrical outer surface.
  • This annular groove makes it possible, in the case of a thin design of the wall of the guide pin 28, to determine the insertion depth of the plug 29 'in the region of the longitudinal bore after the adjustment has taken place, so that the plug is held not only by frictional engagement but also by positive engagement.
  • the deformation can be done with a rolling or flanging tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19840112337 1983-11-17 1984-10-13 Druckventil für Kraftstoffeinspritzpumpen Expired EP0143296B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3341576 1983-11-17
DE3341576 1983-11-17
DE3422017 1984-06-14
DE19843422017 DE3422017A1 (de) 1983-11-17 1984-06-14 Druckventil fuer kraftstoffeinspritzpumpen

Publications (3)

Publication Number Publication Date
EP0143296A2 EP0143296A2 (de) 1985-06-05
EP0143296A3 EP0143296A3 (en) 1985-07-03
EP0143296B1 true EP0143296B1 (de) 1988-01-27

Family

ID=25815692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840112337 Expired EP0143296B1 (de) 1983-11-17 1984-10-13 Druckventil für Kraftstoffeinspritzpumpen

Country Status (3)

Country Link
EP (1) EP0143296B1 (enrdf_load_stackoverflow)
JP (1) JPS60119366A (enrdf_load_stackoverflow)
DE (2) DE3422017A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807572A1 (de) * 1987-03-27 1988-10-13 Diesel Kiki Co Gleichdruckventilaufbau fuer ein treibstoffauslassventil bei einer treibstoffeinspritzpumpe
DE4126879C2 (de) * 1991-08-14 2001-02-22 Bosch Gmbh Robert Gleichdruckentlastungsventil für Kraftstoffeinspritzanlagen

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62243965A (ja) * 1986-04-12 1987-10-24 Diesel Kiki Co Ltd 等圧弁
JPH059499Y2 (enrdf_load_stackoverflow) * 1988-01-18 1993-03-09
DE3904518A1 (de) * 1989-02-15 1990-08-23 Bosch Gmbh Robert Gleichdruckentlastungsventil fuer kraftstoffeinspritzanlagen
JP2841510B2 (ja) * 1989-08-02 1998-12-24 株式会社デンソー 燃料噴射ポンプ
JP2636483B2 (ja) * 1990-09-12 1997-07-30 株式会社デンソー 燃料噴射ポンプ用吐出弁
DE4037465A1 (de) * 1990-10-31 1992-05-07 Daimler Benz Ag Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
JPH0693886A (ja) * 1992-07-31 1994-04-05 Nippondenso Co Ltd 燃料噴射ポンプ用遠心力ガバナ
DE102005053862A1 (de) 2005-11-04 2007-05-10 Pharmasol Gmbh Verfahren und Vorrichtung zur Herstellung hochfeiner Partikel sowie zur Beschichtung solcher Partikel
JP4998837B2 (ja) 2009-12-10 2012-08-15 株式会社デンソー 高圧ポンプ
US9181944B2 (en) 2011-03-31 2015-11-10 Denso Corporation High pressure pump having unitary discharge and relief valve
JP5553176B2 (ja) * 2011-08-31 2014-07-16 株式会社デンソー 高圧ポンプ
CN103437930B (zh) * 2013-08-13 2018-05-29 南京威孚金宁有限公司 等压阀性能的控制方法
JP5920636B2 (ja) * 2013-09-13 2016-05-18 株式会社デンソー 高圧ポンプ
JP5644926B2 (ja) * 2013-10-11 2014-12-24 株式会社デンソー 高圧ポンプ
DE102014208891B3 (de) 2014-05-12 2015-09-24 Continental Automotive Gmbh Druckbegrenzungsventil und Bauteil für ein Kraftstoffeinspritzsystem sowie Verfahren zur Herstellung eines Druckbegrenzungsventils
CN108317031B (zh) * 2018-02-09 2020-07-17 中国第一汽车股份有限公司 燃料供给保持阀
GB2620930B (en) * 2022-07-25 2024-12-25 Phinia Delphi Luxembourg Sarl Pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB399858A (en) * 1932-04-12 1933-10-12 Bryce Ltd Improvements in and relating to delivery valves of reciprocating pumps
GB566957A (en) * 1942-04-01 1945-01-22 Bendix Aviat Corp Improvement in fuel injection apparatus
JPS56115849A (en) * 1980-02-15 1981-09-11 Nippon Denso Co Ltd Fuel injection pump for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807572A1 (de) * 1987-03-27 1988-10-13 Diesel Kiki Co Gleichdruckventilaufbau fuer ein treibstoffauslassventil bei einer treibstoffeinspritzpumpe
DE4126879C2 (de) * 1991-08-14 2001-02-22 Bosch Gmbh Robert Gleichdruckentlastungsventil für Kraftstoffeinspritzanlagen

Also Published As

Publication number Publication date
DE3422017A1 (de) 1985-05-30
EP0143296A2 (de) 1985-06-05
DE3469052D1 (en) 1988-03-03
JPH0552429B2 (enrdf_load_stackoverflow) 1993-08-05
EP0143296A3 (en) 1985-07-03
JPS60119366A (ja) 1985-06-26

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