EP0364459B1 - Innentank-kraftstoffpumpenaggregat - Google Patents

Innentank-kraftstoffpumpenaggregat Download PDF

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Publication number
EP0364459B1
EP0364459B1 EP88903765A EP88903765A EP0364459B1 EP 0364459 B1 EP0364459 B1 EP 0364459B1 EP 88903765 A EP88903765 A EP 88903765A EP 88903765 A EP88903765 A EP 88903765A EP 0364459 B1 EP0364459 B1 EP 0364459B1
Authority
EP
European Patent Office
Prior art keywords
base plate
edge
unit housing
fuel pump
pump unit
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
EP88903765A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0364459A1 (de
Inventor
Rainer Jörg WEBER
Johann Atteni
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP0364459A1 publication Critical patent/EP0364459A1/de
Application granted granted Critical
Publication of EP0364459B1 publication Critical patent/EP0364459B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units

Definitions

  • the invention relates to an inner tank fuel pump unit with a vertically arranged, cylindrical unit housing, which has an open lower end, into which a base plate is inserted, which contains a suction channel, which extends from the outer surface of the base plate and in a suction opening in the inner surface the bottom plate opens.
  • gas bubbles form under the pump on the outer surface of the base plate, particularly when the fuel is heated to a great extent, which can disrupt the conveying operation or bring it to a complete standstill.
  • the reason for the formation of such gas bubbles is, inter alia, that in the known pumps due to the formation and arrangement of the base plate in the fuel on its way along the base plate to the intake duct and to the intake opening, local areas occur with different pressures, which Favor formation of gas bubbles.
  • a fuel pump is known in which a strainer is arranged in front of the base plate, which has a convex shape, for example. This is to prevent a gas bubble cushion from forming on the outer surface of the sieve, which impairs the conveyance, since it is to be expected that the gas bubbles which form will rise due to their lower specific weight along the outer surface of the sieve to the edge of the sieve and then along the The outer surface of the pump can continue to flow upwards.
  • a screen tends to favor the formation of gas bubbles due to its flow resistance.
  • the same disadvantages also occur in the version according to FR-A-980 744, in which a suction basket with slits and a rounded peripheral edge is provided in front of the base plate.
  • the base plate has a flat central area containing the suction opening, to which an obliquely extending edge area connects, so that even if the suction basket is omitted, the gas bubbles which necessarily form at higher temperatures and collect on the underside of the base plate do not escape to the outside wander, but are entrained by the drawn fuel and get into the central intake opening.
  • the invention has for its object to provide an internal tank fuel pump unit of the generic type, in which the tendency to form gas bubbles is reduced and the entry of gas bubbles in the intake duct is largely avoided.
  • the edge surrounding the intake duct is preferably greatly rounded in order to largely avoid a pressure jump when flowing around this edge.
  • the inner tank fuel pump unit shown in FIG. 1 has a vertical, cylindrical unit housing 1, in which a unit 2 consisting of a fuel pump and an electric motor driving it is arranged.
  • the unit housing has an open lower end 3, into which a base plate 4 is inserted, from the outer surface 5 of which a suction channel 6 extends, which opens into a suction opening 7 on the inside 8 of the base plate 4.
  • the outer surface 5 of the base plate 4 is convex and smooth and is flush with the edge 9 of the unit housing 1.
  • the intake duct 6 is kidney-shaped and narrows in a funnel shape to the likewise kidney-shaped intake opening 7.
  • the edge 10 surrounding the intake duct 6 is, as can be seen from FIG. 1, very rounded.
  • the fuel tank should be able to be emptied as far as possible.
  • the prerequisite for this is that the suction opening or the mouth of the suction channel 6 is as close as possible to the bottom 11 of the fuel tank, shown in broken lines.
  • the radially outer wall 12 of the intake duct 6 forms a smaller angle with the longitudinal central axis 13 of the unit housing 1 than the radially inner wall 14.
  • an insert part 15 is placed on the conventional base plate 4a, which has a jagged outer surface, which is set back in relation to the edge 9 of the unit housing 1, which has a convex, smooth, corresponding to the base plate 4 in FIG. 1 Has outer surface 16, which in this case overlaps the edge 9 of the unit housing 1.
  • the insert part 15 contains a suction channel 18 which is aligned with the suction opening 17 in the base plate 4a and widens outwardly in the shape of a funnel, which in turn is designed in the manner described in connection with FIG. 1.
  • Adhesive is attached to the base plate 4a, existing pump units can be converted.
  • the base plate 4 or the insert 15 can be made of plastic or metal, preferably aluminum.
  • the base plate 4 of FIG. 1 can also be designed such that it overlaps the edge 9 of the unit housing like the insert part 15 of FIG. 3.
  • the insert part 15 of FIG. 3 can be designed such that its outer surface 16 is flush with the edge 9 of the unit housing 1.
  • the pump unit according to the invention is preferably used in connection with a so-called swirl pot which is surrounded by a sieve which keeps contaminants away from the pump. This eliminates the need to provide a screen directly in front of the suction opening or the suction channel of the pump, which contributes to the formation of gas bubbles due to the pressure drop it generates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP88903765A 1987-05-12 1988-05-05 Innentank-kraftstoffpumpenaggregat Expired - Lifetime EP0364459B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8706776U 1987-05-12
DE8706776U DE8706776U1 (de) 1987-05-12 1987-05-12 Innentank-Kraftstoffpumpenaggregat

Publications (2)

Publication Number Publication Date
EP0364459A1 EP0364459A1 (de) 1990-04-25
EP0364459B1 true EP0364459B1 (de) 1991-02-20

Family

ID=6807924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88903765A Expired - Lifetime EP0364459B1 (de) 1987-05-12 1988-05-05 Innentank-kraftstoffpumpenaggregat

Country Status (5)

Country Link
US (1) US5022830A (enrdf_load_stackoverflow)
EP (1) EP0364459B1 (enrdf_load_stackoverflow)
JP (1) JPH0346217Y2 (enrdf_load_stackoverflow)
DE (3) DE8706776U1 (enrdf_load_stackoverflow)
WO (1) WO1988008929A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941483A1 (de) * 1989-12-15 1991-06-20 Audi Ag Innentank-kraftstoffpumpe
US5273394A (en) * 1992-09-24 1993-12-28 General Motors Corporation Turbine pump
DE9215639U1 (de) * 1992-11-12 1994-03-17 Zimmer, Johannes, Klagenfurt Einrichtung zur Zuführung fließfähiger Substanzen an eine substanzverbrauchende Maschine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR980744A (fr) * 1943-02-18 1951-05-17 Tecalemit Pompe électrique à combustible liquide
GB574140A (en) * 1943-10-26 1945-12-21 Pulsometer Eng Co Improvements in or relating to pumping systems
US2485980A (en) * 1946-09-03 1949-10-25 George W Wright Rotary pump
US2474009A (en) * 1948-06-02 1949-06-21 Filtors Inc Oil filter and pump combination
US2780999A (en) * 1951-12-12 1957-02-12 Borg Warner Fuel booster pump
FR1173045A (fr) * 1957-03-18 1959-02-18 Dispositif de réglage du débit des pompes à hélice et centrifuges
US3014623A (en) * 1958-01-29 1961-12-26 Borg Warner Motor and pump mounting means
US3292733A (en) * 1964-07-08 1966-12-20 Everett Fluid silencing improvements for pumps
NO276573L (enrdf_load_stackoverflow) * 1973-07-05 1975-02-03 Thune Eureka As
JPS5488415U (enrdf_load_stackoverflow) * 1977-12-05 1979-06-22
DE3223515A1 (de) * 1982-06-24 1983-12-29 Robert Bosch Gmbh, 7000 Stuttgart Aggregat zum foerdern von kraftstoff, insbesondere aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeugs
US4619588A (en) * 1984-04-25 1986-10-28 Facet Enterprises, Incorporated Wet motor gerotor fuel pump with vapor vent valve and improved flow through the armature
DE3437021A1 (de) * 1984-10-09 1986-04-10 Robert Bosch Gmbh, 7000 Stuttgart Aggregat zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeuges
US4784587A (en) * 1985-06-06 1988-11-15 Nippondenso Co., Ltd. Pump apparatus
DE8603736U1 (de) * 1986-02-13 1986-05-07 Audi AG, 8070 Ingolstadt Innentank-Kraftstoffpumpenaggregat

Also Published As

Publication number Publication date
DE8706776U1 (de) 1987-07-30
DE3861794D1 (de) 1991-03-28
JPH0346217Y2 (enrdf_load_stackoverflow) 1991-09-30
US5022830A (en) 1991-06-11
EP0364459A1 (de) 1990-04-25
WO1988008929A1 (fr) 1988-11-17
DE8805993U1 (de) 1988-06-30
JPH03500001U (enrdf_load_stackoverflow) 1991-03-28

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