EP1143138A1 - Pompe d'injection de carburant - Google Patents

Pompe d'injection de carburant Download PDF

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Publication number
EP1143138A1
EP1143138A1 EP00810285A EP00810285A EP1143138A1 EP 1143138 A1 EP1143138 A1 EP 1143138A1 EP 00810285 A EP00810285 A EP 00810285A EP 00810285 A EP00810285 A EP 00810285A EP 1143138 A1 EP1143138 A1 EP 1143138A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection pump
piston
cover
collecting device
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.)
Withdrawn
Application number
EP00810285A
Other languages
German (de)
English (en)
Inventor
Marcel Blasendorf
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.)
Wartsila NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz AG
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 Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to EP00810285A priority Critical patent/EP1143138A1/fr
Publication of EP1143138A1 publication Critical patent/EP1143138A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection pump according to the preamble of claim 1.
  • the object of the present invention is an economically more advantageous one Form fuel injection pump.
  • a fuel injection pump comprising a pump housing and one provided therein Pressure chamber for fuel, with a piston, the first end of which Pressure chamber is assigned, and the second end with a plunger is coupled, as well as with one between the pump housing and the Tappet acting spring, one of the piston and / or the tappet surrounding cover in the area of the second end of the piston is arranged, the cover one towards the plunger has widening external cross-section, the ram of one
  • the collecting device is surrounded, the collecting device has an outlet opening has, and the cover and the collecting device so mutual are adapted so that the leaking along the piston Fuel is passed through the cover into the catcher.
  • the fuel injection pump according to the invention is particularly suitable for a two-stroke diesel engine with a cylinder bore of preferably larger than 350 mm or for a four-stroke diesel engine with one Cylinder bore preferably greater than 150 mm.
  • Fig. 1 shows in a longitudinal section to illustrate the invention essential elements of the fuel injection pump 1.
  • the Fuel injection pump 1 includes other elements such as Seals which are known to a person skilled in the art and therefore not are shown.
  • a pump housing 2 comprising a lower one Part housing 2a and an upper part housing 2b is one in a sleeve 4th piston 3 mounted longitudinally displaceably.
  • a pressure chamber 5 is recessed for fuel, the piston 3 being a has first end 3a, which is assigned to the pressure chamber 5.
  • the first end 3a comprises an end face 3a with a Control edge.
  • the sleeve is surrounded by a storage chamber 12, in which Fuel is stored, and which via the supply lines 4a is fluidly connectable to the pressure chamber 5.
  • the representation of the piston 3 is selected such that the one shown on the left Partial piston shows the position of piston 3 at bottom dead center UTP, whereas the partial piston shown on the right, the position of the piston 3 in top dead center reflects OTP.
  • the piston 3 has a second one opposite the first end 3a End 3d on, which via a fastening section 3c to a plunger 7 is coupled.
  • the plunger 7 is longitudinally displaceable in the first partial housing 2a stored.
  • the piston 3 can be fixed to the plunger 7 or only be placed freely on this.
  • the plunger 7 is a Drive device 6 driven, thereby the piston 3 by one given stroke in the longitudinal direction, or upwards or vertically in one cycle to move back and forth.
  • the drive device does not include one shown, arranged below the fuel injection pump 1 Camshaft with cam, and one in a roller pin 6b and one Bearing 6c mounted roller 6a, which via the guide 6d with the plunger 7th connected is.
  • the cam acts on the roller 6a and thereby moves the Ram 7 alternately in a low-lying position 7b shown on the left and in a high position 7a shown on the right.
  • the piston 3 At the second end 3d of the piston 3 is a piston 3 surrounding bell-shaped cover 8 arranged, which one against the Plunger 7 has an outer cross section widening.
  • the cover 8 is preferably connected to the piston 3 in a fluid-tight manner.
  • the first partial housing 2a has a cover 8 that is configured accordingly Catch pan 2e.
  • At the bottom 2h of the sump 2e is one Part housing 2a penetrating outlet opening 2f arranged.
  • the piston 2 has a gap seal with grooves 3b, which the Seals pressure chamber 5 against below. Even so, a small portion is leaking Fuel along the piston 3 and sleeve 4 to the second end portion 3d of the piston 3. This portion of fuel flows along the surface of the Cover 8 and is thereby passed into the sump 2e. After that this portion of fuel is discharged via the outlet opening 2f and from the Fuel injection pump 1 removed. This ensures that the leaking fuel does not reach the drive device 6, causing a Contamination of what is also in the drive device 6 Lubricating oil is excluded.
  • the Catch pan 2e against the plunger 7 towards a cylindrical side wall 2g the length of which is preferably approximately the length of the maximum Strokes of the plunger 7 corresponds.
  • Coil spring 9 lies at one end on a holding means 10 of the second Part housing 2b, and with the other end on an annular Contact surface 8a of the cover 8. This in the direction of the lower Dead center UTP force acting on the cover 8 on the second Transfer end 3e of piston 3 and plunger 7.
  • FIG. 2 shows the plunger 7 with cover 8 in the Position of the bottom dead center.
  • Fig. 3 shows the ram with cover 8 in the position of top dead center.
  • the cover 8 has its means 8b forming drops at the lower end, also as a drip screen 8b designated so that the flowing along the surface of the cover 8 Liquid on the drip screen 8b with the formation of drops in the Collecting pan 2e falls.
  • the hollow cylindrical side wall 2g is so wide pulled up that the upper end of the side wall 2g is higher than that Drainer 8b to thereby avoid that the liquid in the gap 13 formed between the side wall 2g and the plunger 7 reached.
  • the cover 8 also has in the area of the drip screen 8b a hollow cylindrical boundary 8c, which additionally a Prevents the liquid from entering the gap 13.
  • Fig. 2 it can be seen that the interior of the cover 8 widens in the direction of travel of the plunger 7 so that the hollow cylindrical side wall 2g between the Cover 8 and the plunger 7 place.
  • Fig. 4 shows the cover 8 in detail, with the upper part as a section is shown, and the lower part shows the drainer 8b, which one A plurality of protruding edges 8d arranged distributed in the circumferential direction has, which serve to form drops.
  • the hollow cylindrical boundary 8c and the annular bearing surface 8a evident.
  • the cover 8 can serve a liquid from the purpose To guide piston 3 to the sump 2e, in a variety of Embodiments can be designed, in particular with different designed courses of the outer surface.
  • the cover 8 can Longitudinal section, for example bell-shaped, umbrella-shaped, U- or V-shaped be designed.
  • the cover 8 is in the region of the second end 2d Piston 3 preferably fixed to the piston 3 or the plunger 7 connected.
  • the fuel injection pump 1 shown in Figure 1 allows in itself the fuel injection quantity in a known manner by means of a bevel edge pump to regulate.
  • the piston 3 has a Outer periphery of the piston 3 extending and opposite its axis inclined control edge 3a or inclined groove 3a.
  • the timespan the opposite of the oblique groove 3a and the feed line 4a of the sleeve 4 during the stroke of the piston 3 can by one of the sleeve 11th caused rotary movement of the piston 3, what the Fuel injection quantity is regulated at one stroke of the piston 3.
  • the rotary movement of the sleeve 11 is carried out by a Rack 11b shifted in the vertical direction to the viewing plane is, the rack 11 b in a surrounding the sleeve 11 Ring gear 11a engages.
  • the sleeve 11 is in through a guide pin 11c vertical direction.
  • the fuel injection pump 1 is lubricated oil through the supply port 2c supplied, the lubricating oil over between the first housing part 2a and the tappet 7 formed gap 7c enters the feed line 2d, is conveyed upwards, and by a in the sleeve 4th recessed, U-shaped feed channel 2d in the between the sleeve 4 and the sleeve 11 formed gap 4c passes to each other lubricate sliding parts. Part of the lubricating oil flows between the sleeve 4 and the sleeve 11 or on the outer surface of the sleeve 4th down, and thereby also reaches the cover 8, so that Lubricating oil also passed into the sump 2e, and over the Exit opening 2f is derived. Is in the sump 2e thus usually both fuel and lubricating oil.
  • Fig. 5 shows a longitudinal section of a further embodiment of a Fuel injection pump 1 which, in contrast to that in FIG. 1 Embodiment shown a housing 2 formed in one piece having.
  • the collecting device 2e is designed as a separate part and held by the housing 2 in the position shown.
  • parts such as the spring plate 8 or the compression spring 9 in the Interior of the housing 2 introduced, and then the Collection device 2e inserted and fixed or detachable with the housing 2nd connected.
  • the collecting device 2e has a cross slope at the bottom 2h so that the fluid that accumulates on the bottom 2h to the left Outlet opening 2f is passed.
  • the one in FIG shown collecting device 2e a transversely inclined floor 2h exhibit.
  • the figures 1 and 5 are identical Reference number numbers are used for identical parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP00810285A 2000-04-03 2000-04-03 Pompe d'injection de carburant Withdrawn EP1143138A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00810285A EP1143138A1 (fr) 2000-04-03 2000-04-03 Pompe d'injection de carburant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00810285A EP1143138A1 (fr) 2000-04-03 2000-04-03 Pompe d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1143138A1 true EP1143138A1 (fr) 2001-10-10

Family

ID=8174637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00810285A Withdrawn EP1143138A1 (fr) 2000-04-03 2000-04-03 Pompe d'injection de carburant

Country Status (1)

Country Link
EP (1) EP1143138A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312801A2 (fr) * 2001-11-16 2003-05-21 Robert Bosch Gmbh Etage de pompe refroidi avec le carburant pompé
WO2015120942A1 (fr) * 2014-02-17 2015-08-20 Robert Bosch Gmbh Pompe à essence à piston pour moteur à combustion interne

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339724A (en) * 1991-03-05 1994-08-23 Wartsila Diesel International Ltd. Oy Arrangement for the lubrication of the piston member of a fuel injection pump
DE3590194C2 (de) 1984-05-08 1996-03-28 Diesel Kiki Co Brennstoff-Einspritzpumpe
US5775203A (en) * 1997-01-28 1998-07-07 Cummins Engine Company, Inc. High pressure fuel pump assembly
WO1998054461A1 (fr) * 1997-05-28 1998-12-03 Man B & W Diesel A/S Procede de fonctionnement d'une pompe a carburant a actionnement hydraulique pour moteur a combustion interne, et pompe a carburant a actionnement hydraulique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3590194C2 (de) 1984-05-08 1996-03-28 Diesel Kiki Co Brennstoff-Einspritzpumpe
US5339724A (en) * 1991-03-05 1994-08-23 Wartsila Diesel International Ltd. Oy Arrangement for the lubrication of the piston member of a fuel injection pump
US5775203A (en) * 1997-01-28 1998-07-07 Cummins Engine Company, Inc. High pressure fuel pump assembly
WO1998054461A1 (fr) * 1997-05-28 1998-12-03 Man B & W Diesel A/S Procede de fonctionnement d'une pompe a carburant a actionnement hydraulique pour moteur a combustion interne, et pompe a carburant a actionnement hydraulique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"COMPACT AND MORE COMPETITIVE ENGINES FROM MAN B&W DIESEL", SCHIFF UND HAFEN,DE,SEEHAFEN-VERLAG ERIK BLUMENFELD. HAMBURG, vol. 49, no. 2, 1 February 1997 (1997-02-01), pages 44 - 46, XP000679737, ISSN: 0938-1643 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312801A2 (fr) * 2001-11-16 2003-05-21 Robert Bosch Gmbh Etage de pompe refroidi avec le carburant pompé
EP1312801A3 (fr) * 2001-11-16 2004-05-12 Robert Bosch Gmbh Etage de pompe refroidi avec le carburant pompé
WO2015120942A1 (fr) * 2014-02-17 2015-08-20 Robert Bosch Gmbh Pompe à essence à piston pour moteur à combustion interne
US10316807B2 (en) 2014-02-17 2019-06-11 Robert Bosch Gmbh Piston fuel pump for an internal combustion engine

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