EP0073968A1 - Pompe d'injection de carburant - Google Patents

Pompe d'injection de carburant Download PDF

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Publication number
EP0073968A1
EP0073968A1 EP82107463A EP82107463A EP0073968A1 EP 0073968 A1 EP0073968 A1 EP 0073968A1 EP 82107463 A EP82107463 A EP 82107463A EP 82107463 A EP82107463 A EP 82107463A EP 0073968 A1 EP0073968 A1 EP 0073968A1
Authority
EP
European Patent Office
Prior art keywords
pump according
plunger
groove
pump
ring
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
EP82107463A
Other languages
German (de)
English (en)
Other versions
EP0073968B1 (fr
Inventor
Gérard Duplat
Jean Leblanc
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 EP0073968A1 publication Critical patent/EP0073968A1/fr
Application granted granted Critical
Publication of EP0073968B1 publication Critical patent/EP0073968B1/fr
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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
    • F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
    • F02M41/063—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating the distributor and rotary valve controlling fuel passages to pumping elements being combined
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
    • F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
    • F02M41/063—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating the distributor and rotary valve controlling fuel passages to pumping elements being combined
    • F02M41/066—Arrangements for adjusting the rotary valve-distributor

Definitions

  • the invention relates to a fuel injection pump according to the preamble of claim 1.
  • a fuel injection pump is known from DE-AS 23 22 858, in which the parts causing the stroke, such as pistons, rollers, tappets and springs, are arranged individually in the bushing are. This individual arrangement is problematic because it reduces the stability of the pump and requires a repair because of the large number of individual parts.
  • the invention is based on the idea that the plunger moves on all sides and this accommodates the other parts in the manner of a cage.
  • the rigidity of the hollow cylinder i.e. the wall of the plunger is raised and that, in particular, the assembly consisting of piston, spring and plunger does not fall apart during assembly and disassembly.
  • FIG. 1 shows a diagonal section through a fuel injection pump according to section II in Figure 2;
  • Figure 2 shows an axial section in the delivery area of the pump according to section II-II in Figure 1;
  • 3 shows a diagonal section in the area of the baffle ring according to section III-III in FIG. 2;
  • FIG. 4 a section of a second variant of the impact ring;
  • FIG. 5 the plunger in a spatial representation with an elongated hole.
  • a fuel injection pump of FIGS. 1 and 2 is designed as a radial piston pump with a bushing 11 fastened in the pump housing 10, in which a slide 12 driven by a shaft, not shown, is rotatably and axially displaceably mounted.
  • a cam ring 13 has a plurality of inwardly directed cams 14 and is also driven by the shaft via a flange 15.
  • Four plungers 9 are also guided in bores 17 of the bushing 11 and have a blank cylinder 20 and a base 18 with a groove 19.
  • a roller 21 is rotatably mounted, the cross section of the groove 19 being a circular surface section with the same radius as that of the roller 21 and the depth of the groove 19 being greater than the radius of the circular surface section.
  • Each of the four plungers 9 leads in a bore 17 and is arranged coaxially with a piston 16.
  • a coil spring 22 is supported on the one hand on the bushing 11 and on the other hand on a spring plate 23 which is blown into the piston 16.
  • the piston 16 is pressed against the inside of the tappet 9, so that the roller 21 always bears against the raceway 24 of the cam ring 13.
  • a locking ring 25 made of sheet metal and produced by punching is attached to a hub 26 by means of a snap ring 27 and has a plurality of fingers 28 which are axially directed with respect to the slide 12.
  • a slot 29 is arranged parallel to the stroke direction, and in the end face of the bush 11 a total of four openings 30 are arranged such that one opening 30 corresponds to one slot 29, so that a finger 28 of the Circlip 25 engages through slot 30 in slot 29.
  • a plurality of metering bores 31 are arranged radially in the bushing 11, and a supply groove j3 in the slide 12 connects a metering bore 31 with the displacement 32 of each bore 8.
  • a distributor groove 33 'in the slide 12 connects the displacement 32 with a branch channel 38, the connection with injection nozzles, not shown.
  • FIG. 3 shows the impact ring 36 which is inserted into the annular groove 35 of the bushing 11 and which consists of two identical halves 37. Each half has an inwardly facing hook 39 and an outwardly facing hook 40, both of which can be locked together.
  • the impact ring 46 shown only in sections in FIG. 4 consists of two halves 47 and 48.
  • the two hooks 50 of one half 47 are directed radially outwards, and the two hooks 49 of the other half 48 are directed diagonally inwards, so that both halves are also lockable and form the baffle ring 46.
  • the plunger 89 in FIG. 5 has the bottom 78 with the groove 19 and the hollow cylindrical wall 80.
  • Two elongated holes 79 are formed in this at two diametrical locations, the longitudinal extent of each elongated hole 79 being arranged in the stroke direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP82107463A 1981-09-04 1982-08-17 Pompe d'injection de carburant Expired EP0073968B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3135045 1981-09-04
DE3135045 1981-09-04
DE3146625 1981-11-25
DE19813146625 DE3146625A1 (de) 1981-09-04 1981-11-25 Kraftstoff-einspritzpumpe

Publications (2)

Publication Number Publication Date
EP0073968A1 true EP0073968A1 (fr) 1983-03-16
EP0073968B1 EP0073968B1 (fr) 1985-06-05

Family

ID=25795782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107463A Expired EP0073968B1 (fr) 1981-09-04 1982-08-17 Pompe d'injection de carburant

Country Status (3)

Country Link
US (1) US4486154A (fr)
EP (1) EP0073968B1 (fr)
DE (2) DE3146625A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564341A (en) * 1983-05-04 1986-01-14 Nissan Motor Company, Limited Fuel injection pump for an internal combustion engine
EP0561505A1 (fr) * 1992-03-20 1993-09-22 Lucas Industries Public Limited Company Pompe à combustible

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8410280D0 (en) * 1984-04-19 1984-05-31 Lumber P M P Rotary distributor pump
DE3437973A1 (de) * 1984-10-17 1986-04-17 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3816508A1 (de) * 1988-05-14 1989-11-23 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschine
US5046931A (en) * 1990-07-09 1991-09-10 Allied-Signal Inc. Radial gear driven piston pump
DE10041318A1 (de) * 2000-08-23 2002-03-07 Mannesmann Rexroth Ag Hydraulische Radialkolbenmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267861A (en) * 1963-11-21 1966-08-23 Sigma Fuel injection pumps comprising a distributing valve for use with five cylinders intenal combustion engines
FR2184153A5 (fr) * 1972-05-08 1973-12-21 Sigma

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2243861A (en) * 1938-05-12 1941-06-03 Richard W Hautzenroeder Apparatus for supplying fuel to internal combustion engines
DE828325C (de) * 1950-03-04 1952-01-17 Fr Wilh Deckel Dipl Ing Einspritzpumpe fuer Brennkraftmaschinen
US3138103A (en) * 1961-12-26 1964-06-23 Allis Chalmers Mfg Co Fuel supplying mechanism
US4367714A (en) * 1981-01-19 1983-01-11 Ambac Industries Incorporated Fuel injection pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267861A (en) * 1963-11-21 1966-08-23 Sigma Fuel injection pumps comprising a distributing valve for use with five cylinders intenal combustion engines
FR2184153A5 (fr) * 1972-05-08 1973-12-21 Sigma

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564341A (en) * 1983-05-04 1986-01-14 Nissan Motor Company, Limited Fuel injection pump for an internal combustion engine
EP0561505A1 (fr) * 1992-03-20 1993-09-22 Lucas Industries Public Limited Company Pompe à combustible
US5340284A (en) * 1992-03-20 1994-08-23 Lucas Industries Public Limited Company Two stage fuel pump with pressure passage in the first stage rotor

Also Published As

Publication number Publication date
US4486154A (en) 1984-12-04
DE3264049D1 (en) 1985-07-11
DE3146625A1 (de) 1983-03-17
EP0073968B1 (fr) 1985-06-05

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