EP0219635B1 - 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
EP0219635B1
EP0219635B1 EP86111244A EP86111244A EP0219635B1 EP 0219635 B1 EP0219635 B1 EP 0219635B1 EP 86111244 A EP86111244 A EP 86111244A EP 86111244 A EP86111244 A EP 86111244A EP 0219635 B1 EP0219635 B1 EP 0219635B1
Authority
EP
European Patent Office
Prior art keywords
valve
plunger
pump
hand
shut
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 - Lifetime
Application number
EP86111244A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0219635A1 (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 operable pumps are used to fill the system during commissioning or to refill and vent 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 and seal the working area in the cylinder so that pressure surges (pressure peaks) of the feed pump do not damage or even destroy the piston or the seals, which would render the pump inoperable.
  • a hand pump of the generic type is known from US Pat. No. 2,290,829, which is, however, firmly integrated into the housing of the feed pump of a fuel injection system.
  • the piston is locked here automatically without additional securing means by the return spring holding the piston in its rest position.
  • the working space has its largest volume and accordingly increases the dead volume of the openly connected working space of the feed pump, as a result of which the pressure surges of the feed pump can penetrate fully onto the seals of the piston of the hand pump and destroy them.
  • a manually operable 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 a thrust 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 valve 19A 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 valve 19A in the form of a ball valve.
  • 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 26 leading channel 25 is screwed.
  • the piston 12 has an axial bore 28 and has a hollow cylindrical piston rod 27, the cavity 29 of which forms an annular inner shoulder 30 with the bore 28.
  • a hollow cylindrical valve tappet 31 has an outer collar 32 abutting the inner shoulder 30 at one end and a plurality of radial slots 34 and a central pin 33 at the other end.
  • One end face of the valve plunger 31 forms a stop 38 which cooperates with an end face 39 of the screw connection 11 in a manner to be described.
  • the working space 36 of the hand pump is formed by a cavity which is delimited by the cylinder 10, screw-on connector 11 and piston 12, as well as the cavity 29 of the piston rod 27 and a cavity 35 of the valve tappet 31.
  • 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 shut-off valve 19A In the rest position shown, the shut-off valve 19A is closed and the working space 36 of the pump connected to the cavities 29 and 35 is filled with a medium, i.e. filled with air, fuel or a mixture of fuel and air.
  • a pressure according to arrow 52 on the actuating element 37 effects the inward stroke of the piston 12 against the force of the return spring 47, the pin 33 pushing the shut-off valve 19A and thereby pushing medium out of the working space 36 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 the pressure force (arrow 52) - in addition to the force of the return spring 47 - then counteracts the force of the retaining spring 50.
  • medium i.e. Air or fuel or fuel-air mixture is pressed from the working space 36 into the pressure system 53 of the feed pump 26.
  • the backward stroke (arrow 54) of the piston 12 takes place automatically in the reverse order until the illustrated rest position of the pump is reached with the shut-off valve 19A closed.
  • Air or medium i.e. Fuel or fuel-air mixture drawn from the suction system 55 of the feed pump 26 into the working space 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 26 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
DE3534485 1985-09-27
DE19853534485 DE3534485A1 (de) 1985-09-27 1985-09-27 Handbetaetigbare pumpe fuer foerderpumpen von kraftstoff-einspritzanlagen fuer brennkraftmaschinen

Publications (2)

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

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900875A1 (de) * 1989-01-13 1990-07-19 Bosch Gmbh Robert Handbetaetigbare pumpe fuer foerderpumpen von kraftstoff-einspritzanlagen fuer brennkraftmaschinen
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
US6840508B2 (en) * 2003-03-13 2005-01-11 Tecumseh Products Company Push button air primer for carburetor
US6863266B2 (en) 2003-03-13 2005-03-08 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

Family Cites Families (11)

* 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
US2966861A (en) * 1956-10-08 1961-01-03 Drackett Co Measuring pump
US3288072A (en) * 1965-01-13 1966-11-29 Walker Mfg Co Pump
US3468257A (en) * 1966-04-02 1969-09-23 Eberspaecher J Liquid pump valve actuating arrangement
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
US3803988A (en) * 1973-04-30 1974-04-16 Ovico Diesel fuel primer pump
CA1008825A (en) * 1974-03-28 1977-04-19 William E. Warren Pump assembly for an atomizing piston pump
US4012174A (en) * 1975-10-20 1977-03-15 Caterpillar Tractor Co. Fuel priming pump
GB2114237B (en) * 1982-01-23 1985-06-05 Lucas Ind Plc Fuel treatment device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Druckschrift der Robert Bosch GmbH, Stuttgart "Bosch Technische Unterrichtung-Diesel-Einspritzausrüstung (1)",VDT-UBP 001/15, S. 26, 2. Ausgabe, 30.04.73 *

Also Published As

Publication number Publication date
US4747760A (en) 1988-05-31
JPH0792027B2 (ja) 1995-10-09
DE3534485A1 (de) 1987-04-02
EP0219635A1 (de) 1987-04-29
DE3670345D1 (de) 1990-05-17
JPS6282267A (ja) 1987-04-15

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