EP0219635A1 - Handbetätigbare Pumpe für Förderpumpen von Kraftstoff-Einspritzanlagen für Brennkraftmaschinen - Google Patents

Handbetätigbare Pumpe für Förderpumpen von Kraftstoff-Einspritzanlagen für Brennkraftmaschinen Download PDF

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Publication number
EP0219635A1
EP0219635A1 EP86111244A EP86111244A EP0219635A1 EP 0219635 A1 EP0219635 A1 EP 0219635A1 EP 86111244 A EP86111244 A EP 86111244A EP 86111244 A EP86111244 A EP 86111244A EP 0219635 A1 EP0219635 A1 EP 0219635A1
Authority
EP
European Patent Office
Prior art keywords
piston
pump
cylinder
pump according
actuating element
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
EP86111244A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0219635B1 (de
Inventor
Leonhard Eberl
Karl Mielich
Miklos Dipl.-Ing. Mozes
Walter Schmid
Klaus Stieninger
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 EP0219635A1 publication Critical patent/EP0219635A1/de
Application granted granted Critical
Publication of EP0219635B1 publication Critical patent/EP0219635B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14—Pumps characterised by muscle-power operation
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/16—Feeding by means of driven pumps characterised by provision of personally-, e.g. manually-, operated pumps

Definitions

  • the invention relates to a hand-operated pump for feed pumps of fuel injection systems for internal combustion engines according to the preamble of claim 1.
  • Such manually operated pumps are used to fill the system during commissioning or for refilling and venting after an intervention, such as when changing a filter insert or a filter box .
  • the piston When the pump is at rest, the piston must therefore be locked in the cylinder so that pressure surges (pressure peaks) of the feed pump do not damage or even destroy the piston or the seals, so that the pump would no longer be functional.
  • Such a pump is known from US Pat. No. 3,803,968, in which the locking takes place by means of a bayonet lock of the actuating element with the cylinder. Furthermore, a type of pump is known, the pistons of which have a threaded pin and the cylinders of which have a corresponding internal thread. The screw is locked by screwing the threaded pin into the internal thread.
  • the problem set out in the aforementioned prior art is solved with technically simple means and achieved that after the pump has been actuated, the piston does not have to be locked or similarly fixed to the cylinder.
  • the static sealing in the end position of the piston achieves on the one hand the smallest possible dead space and on the other hand prevents pressure peaks on the dynamic piston seal. Because the pump only requires pressure actuation, it can still be operated even in hard-to-reach places.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures.
  • the single figure shows a hand-operated hand pump for feed pumps of fuel injection systems for internal combustion engines in axial section and natural size.
  • a hand-operated hand pump for feed pumps of fuel injection systems for internal combustion engines has a cylinder 10 with a front end part designed as a screw connection 11 and a piston 12 with an end pin 14 on which a double lip seal 13 cooperating with the cylinder 10 is blown open.
  • the screw connection 11 has a bore 15 which widens to a conical valve seat 16 which merges into a second bore 17 with a pressed-in support sleeve 18.
  • a valve ball 19, as a shut-off part of a shut-off element, is pressed against the valve seat 16 by a valve spring 20, which rests on the support sleeve 18, and the valve seat 16 and the valve ball 19 form the shut-off element in the form of a ball valve 16/19.
  • the cylinder 10 is sealed and fastened to the screw-on connector 11 by means of an O-ring 21 or by a plurality of caulking points 22 distributed around the circumference Feed pump 26 leading channel is screwed.
  • the piston 12 has an axial bore 28 and has a hollow cylindrical piston rod 27 on the end face, the cavity 29 of which forms an annular inner shoulder 30 with the bore 28.
  • a hollow cylindrical valve tappet 31 has at one end an outer collar 32 abutting the inner shoulder 30 and at the other end a plurality of radial slots 34 and a central pin 33 interacts in a descriptive manner.
  • the working space of the hand pump is formed by the cavity 29 of the piston rod 27, a cavity 35 of the valve plunger 31 and a cavity 36 which the cylinder 10, the screw connector 11 and the piston 12 limit.
  • An actuating element 37 made of plastic has a plate 40, on the outer edge of which a sleeve 41 with an end-side inner groove 42 continues, into which a bead 43 of a stop ring 44 engages; this is attached to the sleeve 41 by ultrasonic welding.
  • An outer ring 45 projects from the jacket of the cylinder 10, on one shoulder of which the stop ring 44 is supported and on the opposite shoulder 46 a return spring designed as a helical compression spring 47 for the piston 12 is supported; on the other hand, the helical compression spring 47 presses against an annular shoulder 48 of the actuating element 37.
  • the stop ring 44 and at least the piston rod 27 are made of fuel-resistant plastic.
  • a prestressed retaining spring 50 is designed as a helical compression spring, which is supported on a second annular shoulder 51 of the actuating element 37 and holds the outer collar 32 of the valve tappet 31 pressed against the inner shoulder 30 of the piston 12.
  • the hand pump works as follows:
  • the ball valve (16/19) is closed and the working space of the pump formed by the cavities 29 and 35 and 36 is filled with air or medium, ie fuel or a mixture of fuel with air.
  • a pressure according to arrow 52 on the actuating element 37 counteracts the force of the return spring 47 and causes the piston 12 to move inwards, whereby the pin 33 pushes open the ball valve 16/19 and thereby medium from the working space 29/35/36 is pressed into the pressure system 53 of the feed pump 26.
  • the further inward stroke brings about the stop of the valve tappet 31 by the interaction of the stop 38 with the end face 39, so that afterwards the pressure force 52 - in addition to the force of the return spring 47 - counteracts the force of the retaining spring 50.
  • air or medium, ie fuel or fuel-air mixture is pressed from the working space 29/35/36 into the pressure system 53 of the feed pump 26.
  • the return stroke of the piston 12 takes place automatically in the reverse order until the shown rest position of the pump with closed ball valve 16/19 is reached; air or medium, i. H. Fuel or fuel-air mixture drawn from the suction system 55 of the feed pump 26 into the working space 29/35/36.
  • the injection system is filled and vented at the same time by alternately sucking medium from the suction system and pressing it into the pressure system.
  • the hand pump can also be used for the same purpose in pipelines and the like, the hand pump then being attached to a separate housing which contains a suction valve and a pressure valve which are necessary for the function.
  • suction and pressure valves of the feed pump are also used by the hand pump in a manner known per se.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP86111244A 1985-09-27 1986-08-14 Handbetätigbare Pumpe für Förderpumpen von Kraftstoff-Einspritzanlagen für Brennkraftmaschinen Expired - Lifetime EP0219635B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853534485 DE3534485A1 (de) 1985-09-27 1985-09-27 Handbetaetigbare pumpe fuer foerderpumpen von kraftstoff-einspritzanlagen fuer brennkraftmaschinen
DE3534485 1985-09-27

Publications (2)

Publication Number Publication Date
EP0219635A1 true EP0219635A1 (de) 1987-04-29
EP0219635B1 EP0219635B1 (de) 1990-04-11

Family

ID=6282115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111244A Expired - Lifetime EP0219635B1 (de) 1985-09-27 1986-08-14 Handbetätigbare Pumpe für Förderpumpen von Kraftstoff-Einspritzanlagen für Brennkraftmaschinen

Country Status (4)

Country Link
US (1) US4747760A (es)
EP (1) EP0219635B1 (es)
JP (1) JPH0792027B2 (es)
DE (2) DE3534485A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231097A (en) * 1989-01-13 1990-11-07 Bosch Gmbh Robert Hand-operated pump for a feed pump of a fuel injection system for an internal combustion engine

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313853C2 (de) * 1993-04-28 1997-08-07 Bosch Gmbh Robert Handbetätigbare Pumpe für Förderpumpen von Kraftstoffeinspritzanlagen für Brennkraftmaschinen
US5984425A (en) * 1998-01-22 1999-11-16 Wacker Corporation Spring applied/hydraulically released braking system employing self-resetting override valve
DE10041486A1 (de) * 2000-08-24 2002-03-21 Portex Handelsgmbh Handbetätigte Pumpe
US20030137104A1 (en) * 2002-01-22 2003-07-24 Gaylor Edward Appleton Hardway
US6863266B2 (en) 2003-03-13 2005-03-08 Tecumseh Products Company Push button air primer for carburetor
US6840508B2 (en) * 2003-03-13 2005-01-11 Tecumseh Products Company Push button air primer for carburetor
US6848680B2 (en) * 2003-03-27 2005-02-01 Tecumseh Products Company Push button air primer for carburetor
EP2273123B9 (de) 2009-07-08 2018-03-21 Pierburg Pump Technology GmbH Sicherung eines Pumpenlaufrades
DE102010016480A1 (de) * 2010-04-16 2011-10-20 Hengst Gmbh & Co. Kg Handpumpe eines Kraftstoffsystems
DE102011083787A1 (de) * 2011-09-29 2013-04-04 Hengst Gmbh & Co. Kg Kraftstoffpumpanordnung
CN108979921A (zh) * 2018-06-25 2018-12-11 潍柴动力股份有限公司 用于燃油滤清器的手压泵和排气方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290829A (en) * 1939-09-29 1942-07-21 Timken Roller Bearing Co Fuel pump
US3468257A (en) * 1966-04-02 1969-09-23 Eberspaecher J Liquid pump valve actuating arrangement
US3803988A (en) * 1973-04-30 1974-04-16 Ovico Diesel fuel primer pump
US4147476A (en) * 1974-03-28 1979-04-03 Bespak Industries Limited Pump assembly for an atomizing piston pump
GB2114237A (en) * 1982-01-23 1983-08-17 Lucas Ind Plc Fuel treatment device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966861A (en) * 1956-10-08 1961-01-03 Drackett Co Measuring pump
US3288072A (en) * 1965-01-13 1966-11-29 Walker Mfg Co Pump
US3500759A (en) * 1968-06-13 1970-03-17 Caterpillar Tractor Co Fuel priming pump
US3669576A (en) * 1970-06-15 1972-06-13 Caterpillar Tractor Co Fuel priming pump
US3803968A (en) * 1972-08-29 1974-04-16 C Black Laminate cutter
US4012174A (en) * 1975-10-20 1977-03-15 Caterpillar Tractor Co. Fuel priming pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290829A (en) * 1939-09-29 1942-07-21 Timken Roller Bearing Co Fuel pump
US3468257A (en) * 1966-04-02 1969-09-23 Eberspaecher J Liquid pump valve actuating arrangement
US3803988A (en) * 1973-04-30 1974-04-16 Ovico Diesel fuel primer pump
US4147476A (en) * 1974-03-28 1979-04-03 Bespak Industries Limited Pump assembly for an atomizing piston pump
GB2114237A (en) * 1982-01-23 1983-08-17 Lucas Ind Plc Fuel treatment device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231097A (en) * 1989-01-13 1990-11-07 Bosch Gmbh Robert Hand-operated pump for a feed pump of a fuel injection system for an internal combustion engine
GB2231097B (en) * 1989-01-13 1992-12-02 Bosch Gmbh Robert Hand-operated pump for a feed pump of a fuel injection system for an internal combustion engine

Also Published As

Publication number Publication date
JPS6282267A (ja) 1987-04-15
DE3670345D1 (de) 1990-05-17
DE3534485A1 (de) 1987-04-02
US4747760A (en) 1988-05-31
EP0219635B1 (de) 1990-04-11
JPH0792027B2 (ja) 1995-10-09

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