EP1001157A2 - Pompe à carburant avec réservoir auxiliaire disposé dans le réservoir principal - Google Patents

Pompe à carburant avec réservoir auxiliaire disposé dans le réservoir principal Download PDF

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Publication number
EP1001157A2
EP1001157A2 EP99120039A EP99120039A EP1001157A2 EP 1001157 A2 EP1001157 A2 EP 1001157A2 EP 99120039 A EP99120039 A EP 99120039A EP 99120039 A EP99120039 A EP 99120039A EP 1001157 A2 EP1001157 A2 EP 1001157A2
Authority
EP
European Patent Office
Prior art keywords
fuel
pump
storage container
delivery unit
unit according
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Withdrawn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
EP99120039A
Other languages
German (de)
English (en)
Other versions
EP1001157A3 (fr
Inventor
Andreas Dipl.-Ing. Kahlert
Jörg Dipl.-Ing. Schmidtchen
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1001157A2 publication Critical patent/EP1001157A2/fr
Publication of EP1001157A3 publication Critical patent/EP1001157A3/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Withdrawn legal-status Critical Current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
    • 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
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • 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
    • F02M37/20—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 characterised by means for preventing vapour lock

Definitions

  • the invention relates to a fuel delivery unit according to the preamble of Claim 1.
  • a fuel delivery pump which is arranged in a storage container.
  • the pump storage container unit is designed for use in a fuel tank, with the storage container serving as a reservoir in order to ensure fuel delivery or the suction of gas through the fuel if the fuel is shifted out of the suction area of the fuel delivery unit - for example when cornering Prevent fuel delivery pump.
  • a fuel delivery unit of this type is known, for example, from Mannesmann / VDO Conveyor unit HPI 5.4 "sold commercially.
  • Fuel delivery units of this type have various disadvantages, which are unfavorable Conditions cause a reat amount of fuel from the tank to stop can be promoted because the fuel pump delivers gas or the remaining amount of fuel can't suck. This is the case, for example, when the fuel level in the Tank below a fuel pump degassing hole or below one Overflow outlet of the stowage container is located and the stowage container thereby partially is emptied. Especially when other circumstances, such as a There is a gas bubble in the area of the intake, especially in a preliminary stage (so-called exchange effect), the fuel delivery can be blocked.
  • the object of the present invention is to provide a fuel delivery unit with a storage container train that sucking in a residual amount of fuel in the fuel tank too is possible under unfavorable conditions.
  • the essential features of the fuel delivery unit according to the invention include a Storage container or pump pot that serves to store liquid fuel and which has a fuel intake opening in its lower area, through which fuel from is sucked into a fuel pump and conveyed to a pump outlet.
  • the Pump outlet is usually a connection piece for a fuel line.
  • the suction opening for the fuel pump to the tank be switchable so that the fuel pump essentially only from the Storage container sucks in when there is no fuel intake from the tank can. This ensures that the storage container is always filled as a reserve Available.
  • a two-way degassing valve is provided on the fuel pump, that allows the pump to degas in the first direction and in the other direction closes gastight.
  • the degassing valve in at a gas pressure allows the gases to escape from the pump against excess liquid pressure in the pump however closes. This ensures that there may be gases in the pump are not pumped into the fuel line, but into the tank interior escape.
  • the degassing valve closes so that the Liquid pressure is not like the gases in the tank interior, but as Fuel delivery discharges into the fuel line.
  • the fuel pump stops the pump pressure decreases to normal values, so that the degassing valve itself has no function.
  • valve on the storage container provided that at a low fuel level the stowage container at least seals against the ingress of a larger amount of gas.
  • this Design excess fuel to flow out of the storage container on the other hand, however, the valve prevents at a fuel level in the fuel tank an emptying of the storage container below the fill level of the storage container. This happens advantageous in that the valve only then the storage container against ingress of Gases closes when the fuel level in the storage container reaches a certain level has sunk. This height is chosen so that it is sufficient for starting Promotion of the fuel pump and at the same time a further emptying of the Storage container is prevented in that the liquid level below a Overflow opening has fallen. This will make an existing one Suction emptying system interrupted, so that further emptying is prevented.
  • both valves can be used simultaneously.
  • the fuel pump is preferably provided with a preliminary stage and a main stage, the preliminary stage conveying into the storage container. With a higher delivery rate the preliminary stage compared to the main stage can be ensured that the main stage can always suck from the storage container without emptying it.
  • the above Switching described is not necessary here.
  • the main stage is advantageous dimensioned so that it generates a vacuum that is sufficient to To suck off gas bubbles in the suction area, in particular a preliminary stage, so that a independent starting of the pump is guaranteed in every operating situation, in Connection with at least one of the above Valves.
  • the fuel delivery unit 1 shown in FIG. 1 contains a as essential features Storage container 5 in which a fuel feed pump 2 is inserted. Furthermore, the Fuel delivery unit 1 is provided with a fastening arm 15 which is designed for Support on an upper part of the tank (not shown). Even sits Fuel delivery unit 1 on a tank bottom 18 of a fuel tank is furthermore a level sensor 14 is attached to the fuel delivery unit 1.
  • the storage container 5 is essentially closed all the way up by one Cover 7, in which the fuel pump 2 is inserted. Furthermore sits in the lid 7 a return port 8, through the excess fuel in the Reservoir space 6 of the storage container 5 can flow back. Outward to The tank interior is open to the reservoir space 6 via the tubes 13, on the one hand form an overflow 12 and an outlet 21 of a pump precursor 4.
  • the Pump pre-stage 4 serves to advance fuel and draws fuel 20 from it Tank bottom 18 on. There is also a degassing channel 11 for the preliminary stage intended.
  • the fuel feed pump 2 is operated electrically via connections 19 and feeds into a flow 9, which can be connected to a fuel line.
  • the main stage 3 of the fuel feed pump 2 is drawn in via a suction-side inlet 10, which is arranged in the reservoir space 6.
  • the main level 3 of the Fuel feed pump 2 is closed by a pump cover 17 in which a Two-way valve 16 (ball valve) is arranged.
  • the two-way valve 16 serves as Degassing valve and is designed so that one is in the main stage 3 Gas quantity 22 when conveyed through the degassing valve 16 into the tank interior arrives, whereas the degassing valve 16 closes when the fuel 20 to Closing element 23 (ball) arrives. This is done, for example, by floating the ball 23 reached. As a result, the delivered fuel 20 then passes with his full pressure in the lead 9.
  • the fuel delivery pump 2 could at a One-way version of the degassing valve 16 gas from the tank interior via the Degassing valve 16 enter main stage 3 when the fuel level - like shown - in the tank below the degassing valve. Basically, this represents No problem for the first time since the fuel feed pump 2 is started up
  • the described degassing takes place immediately. If the tank is emptied further it can be critical, because then with a delayed starting of the engine somewhat delayed fuel delivery and it can also happen that at a fuel level below main stage 3 and a gas bubble before Pre-stage 4, the funding is completely absent, although there are still several liters of fuel in the Fuel tank.
  • the degassing valve 16 is as Two-way valve formed, the ball 23 due to gravity on a lower Seat is gas-tight. As a result, the penetration of tank gases the degassing valve 16 in the main stage 3 when the Fuel feed pump 2 prevented.
  • FIGS 2 and 3 show further measures to prevent the emptying of the Reservoir space 6 in the case of a low fuel level.
  • a cover 7 is provided Valve 116 used, which is essentially composed of a float 126, which is connected to a sealing cap 127.
  • the valve 116 sits in an opening 24 of the Cover 7 and is therefore very simple.
  • the valve 116 is held in position by a bracket 128 so that the valve 116, as shown in Figure 2a, at a Lowering of the fuel level in the reservoir space 6 closes the opening 24 securely.
  • valve 116 is the distance from sealing cap 127 to float 126 dimensioned that when tank gases penetrate through the opening 24 (at a Standstill of the fuel feed pump the fuel level can drop so far that the Tubes 13 lie with their openings above the fuel level. This will achieved that with a non-gastight degassing valve 16 no emptying of the Reservoirs can be done more, because a flow through the tubes 13 is interrupted. At It is the presence of a degassing valve 16 which is not gastight in the return flow direction required that the overflow 12 and the pump inlet 21 above the desired minimum fuel level in the reservoir 6, thus further emptying is prevented.
  • the overflow 12 can also be omitted, where appropriate for a noiseless flow out of the opening 24 transported fuel 20 is to be provided.
  • Valve 216 shown in Figure 3 is largely similar to valve 116, i.e. also here a float 226 is provided which is spaced apart from a sealing cap 227 is arranged.
  • the guide 228 of the valve is integrated in the cover 207, see above that an additional component is omitted.
  • the reservoir becomes floating open.
  • the present invention prevents in fuel delivery units such as those in fuel tanks used in particular by motor vehicles to deliver fuel, under unfavorable circumstances, dry running, although there are still several Liter fuel (20) are in the tank.
  • fuel delivery units such as those in fuel tanks used in particular by motor vehicles to deliver fuel, under unfavorable circumstances, dry running, although there are still several Liter fuel (20) are in the tank.
  • Two-way valve can be used in the cover (7) of the storage container (5), the if the pump (2) is at a standstill and the fuel level is lower, the fuel (20) in the reservoir space (6) of the storage container (5) can drop so far that the Fuel level in the reservoir space is below the inlet and outlet openings (13).
  • the invention finds application in fuel delivery units located in fuel tanks from Motor vehicles are set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP99120039A 1998-11-12 1999-10-18 Pompe à carburant avec réservoir auxiliaire disposé dans le réservoir principal Withdrawn EP1001157A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19852235 1998-11-12
DE1998152235 DE19852235A1 (de) 1998-11-12 1998-11-12 Kraftstoffförderpumpe mit Staubehälter

Publications (2)

Publication Number Publication Date
EP1001157A2 true EP1001157A2 (fr) 2000-05-17
EP1001157A3 EP1001157A3 (fr) 2000-08-16

Family

ID=7887594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120039A Withdrawn EP1001157A3 (fr) 1998-11-12 1999-10-18 Pompe à carburant avec réservoir auxiliaire disposé dans le réservoir principal

Country Status (2)

Country Link
EP (1) EP1001157A3 (fr)
DE (1) DE19852235A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120343B1 (fr) 1983-03-29 1988-04-27 Audi Ag Réservoir pour liquides, notamment réservoir à carburant liquide de véhicules automobiles

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53109021A (en) * 1977-03-07 1978-09-22 Nippon Denso Co Ltd Fuel injection device for internal combustion engine
SE425230B (sv) * 1979-02-19 1982-09-13 Saab Scania Ab Arrangemang vid infestning av tankarmatur i en brensletank
DE2936318B2 (de) * 1979-08-09 1981-07-16 Volkswagenwerk Ag, 3180 Wolfsburg Behälter, insbesondere Kraftstoffbehälter für Kraftfahrzeuge
DE3540260C2 (de) * 1985-11-13 1995-01-05 Bosch Gmbh Robert Aggregat zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine
DE4133288C2 (de) * 1991-10-08 1999-07-22 Ohra Regalanlagen Gmbh Kragarmregal
US5146901A (en) * 1992-02-03 1992-09-15 General Motors Corporation Vapor suppressing fuel handling system
US5727529A (en) * 1994-01-14 1998-03-17 Walbro Corporation Pressure control valve for a fuel system
US5427074A (en) * 1994-05-17 1995-06-27 Walbro Corporation Vented fuel module reservoir
US5456235A (en) * 1994-12-06 1995-10-10 Carter Automotive Company, Inc. Fuel system
DE19618452B4 (de) * 1996-05-08 2005-05-12 Robert Bosch Gmbh Aggregat zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine
US5718208A (en) * 1996-09-16 1998-02-17 Ford Motor Company Fuel vapor management system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120343B1 (fr) 1983-03-29 1988-04-27 Audi Ag Réservoir pour liquides, notamment réservoir à carburant liquide de véhicules automobiles

Also Published As

Publication number Publication date
DE19852235A1 (de) 2000-05-18
EP1001157A3 (fr) 2000-08-16

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