EP0883748A1 - Strömungspumpe - Google Patents

Strömungspumpe

Info

Publication number
EP0883748A1
EP0883748A1 EP97912050A EP97912050A EP0883748A1 EP 0883748 A1 EP0883748 A1 EP 0883748A1 EP 97912050 A EP97912050 A EP 97912050A EP 97912050 A EP97912050 A EP 97912050A EP 0883748 A1 EP0883748 A1 EP 0883748A1
Authority
EP
European Patent Office
Prior art keywords
pump
fuel
channel
return line
inlet
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Withdrawn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
EP97912050A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dietmar Schmieder
Willi Strohl
Jochen Rose
Erich Eiler
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 EP0883748A1 publication Critical patent/EP0883748A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00Pumps with circumferential or transverse flow
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus 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
    • F02M37/04Feeding by means of driven pumps
    • F02M37/048Arrangements for driving regenerative pumps, i.e. side-channel pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00Pumps with circumferential or transverse flow
    • F04D5/002Regenerative pumps

Definitions

  • the invention relates to a flow pump for conveying fluid from a reservoir to a fluid consumer, in particular for conveying fuel from a
  • a flow pump of this type is, for example, from the
  • DE 40 50 521 AI is known and is used in internal combustion engines with fuel injection systems to supply the fuel injection system with fuel from the fuel tank.
  • a fuel injection system with a fuel delivery pump integrated in the fuel tank is known, for example, from US Pat. No. 4,649,884.
  • the electrically driven flow pump always delivers so much fuel from the fuel tank, regardless of the actual fuel consumption of the internal combustion engine, that the maximum
  • the excess amount of fuel is released in a pressure regulator and returned to the fuel tank via a return line.
  • the pressure regulator thus represents a regulated throttle cross section, at which the hydraulic energy carried by the pressurized fuel is converted into flow turbulence, heat and sometimes also into heat of vaporization. On average, around 90% of the hydraulic power generated by the flow pump is destroyed again.
  • the flow pump according to the invention with the characterizing features of claim 1 has the advantage that by introducing the returning excess flow into the side channel of the flow pump, the return flow in the pressure regulator is relaxed only to a pressure that is built up by the flow pump at the mouth of the return line , and is fed back into the flow pump with this residual pressure. This means that a large part of the hydraulic energy generated by the flow pump during delivery is fed back into the flow pump, so that the efficiency of the flow pump is considerably improved.
  • the degree of efficiency improvement depends on the return flow and thus on the actual fluid consumption. With internal combustion engines, the improvement in efficiency is maximum when idling, and minimal under full load. In all cases, however, there is a consumption-dependent reduced power consumption of the flow pump.
  • the efficiency improvement achieved also depends on the point in the side channel where the return flow is fed back in. According to a preferred embodiment of the invention, a location of the Side channel proven, in which approx. 60 - 70% of the final pressure of the flow pump is built up.
  • FIG. 1 shows a side view of a flow pump, partly in section, in a fuel delivery circuit with a fuel delivery line, fuel injection system and fuel return line of an internal combustion engine
  • Fig. 2 is a plan view of a housing cover
  • the flow pump shown in side view and partially in section in FIG. 1, also called a side channel pump, is used to deliver fuel from a fuel tank (not shown) to a fuel injection system 10, an internal combustion engine (not shown) of a motor vehicle, the flow pump being usually arranged in the fuel tank.
  • the fuel delivered by the flow pump into a delivery line 14 first passes through a fuel filter 11 and is then distributed in a fuel distributor to the individual fuel injection nozzles assigned to the combustion cylinders of the internal combustion engine. Not for Excess fuel that is injected is fed via a pressure regulator 12 into a fuel return line 13, which is led back to the flow pump.
  • the flow pump has a pump chamber 16 formed in a pump housing 15, which is delimited by two axially spaced side walls 17, 18 extending transversely to the pump axis and a peripheral wall 19 connecting the side walls along their periphery.
  • the side wall 17 and the peripheral wall 19 are formed on a pump housing 15 fixed in the pump housing 15, while the side wall 18 is formed on a suction or housing cover 21 which is firmly connected to the intermediate housing 20.
  • the pump housing 15 accommodating an electric motor 22 and a pump outlet valve 23 engages over the intermediate housing 20 and is flanged on the housing cover 21.
  • In the intermediate housing 20 there is also an output channel penetrating the side wall 17, which creates a connection between the pump chamber 16 and the interior of the pump housing 15, from which the fuel delivered reaches the delivery line 14 via the pump outlet valve 23.
  • a pump or impeller 24 is arranged coaxially to the pump axis, which is non-rotatably seated on an output shaft 25 of the electric motor 22, which in turn is mounted in the intermediate housing 20.
  • the impeller 24 has a plurality of impeller blades spaced apart from one another in the circumferential direction and not shown in detail here, which are connected to one another at their end remote from the pump axis by a circular outer ring 241.
  • the side channel 26 extends from a channel start 261 to a channel end 262, a web remaining between the channel start 261 and the channel end 262 (cf. FIG. 2).
  • a side channel 27 of the same type is introduced into the side wall 17 formed by the intermediate housing 20, the channel end of which lies at the opening of the connecting channel (not shown here) to the inside of the pump housing 15.
  • a pump inlet 28 opens, which is enclosed by an intake port 29 and via which the flow pump sucks fuel from the fuel tank.
  • a further pump inlet 30 which is enclosed by a connector 31.
  • Intake 29 and connecting piece 31 are integrally formed with the housing cover 21.
  • the mouth of the further pump inlet 30 (FIG. 2) in the side channel 26 is preferably at such a point on the side channel ⁇ 26, at which approximately 50-80%, in particular approximately 60-70%, of the final pump pressure is built up while the flow pump is running.
  • the return line 13 is connected to the connecting piece 31, so that the fuel returned by the injection system via the pressure regulator 12 is fed back into the flow pump. Since the feed point for the fuel in the flow pump has a pressure which is approximately 60-70% of the pump end pressure, the fuel in the pressure regulator 12 can also be expanded to this pressure level only, so that a part of the fuel from the flow pump is conveyed hydraulic energy is fed back into the flow pump, which improves its efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP97912050A 1996-12-12 1997-10-15 Strömungspumpe Withdrawn EP0883748A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19651650A DE19651650A1 (de) 1996-12-12 1996-12-12 Strömungspumpe
DE19651650 1996-12-12
PCT/DE1997/002355 WO1998026184A1 (de) 1996-12-12 1997-10-15 Strömungspumpe

Publications (1)

Publication Number Publication Date
EP0883748A1 true EP0883748A1 (de) 1998-12-16

Family

ID=7814452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97912050A Withdrawn EP0883748A1 (de) 1996-12-12 1997-10-15 Strömungspumpe

Country Status (8)

Country Link
US (1) US6113362A (ko)
EP (1) EP0883748A1 (ko)
JP (1) JP2000505857A (ko)
KR (1) KR19990082290A (ko)
CN (1) CN1096572C (ko)
BR (1) BR9707633A (ko)
DE (1) DE19651650A1 (ko)
WO (1) WO1998026184A1 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6231318B1 (en) * 1999-03-29 2001-05-15 Walbro Corporation In-take fuel pump reservoir
GB0125572D0 (en) * 2001-10-24 2001-12-19 Lucas Industries Ltd Fuel system
JP4952180B2 (ja) * 2006-10-04 2012-06-13 株式会社デンソー 燃料ポンプ
US10036401B2 (en) 2015-04-17 2018-07-31 Caterpillar Inc. Recirculating pump inlet
FR3064996B1 (fr) * 2017-04-11 2020-10-09 Tokheim Uk Ltd Pompe a engrenage pour distributeur de carburant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453774B2 (de) * 1964-02-12 1971-02-18 Hitachi Ltd , Tokio Einrichtung zur verminderung der kaviation bei seiten kanalpumpen
US3259072A (en) * 1964-10-26 1966-07-05 Gen Motors Corp Rotary fuel pump
DE2741535A1 (de) * 1977-09-15 1979-03-29 Bosch Gmbh Robert Fluessigkeitspumpe, insbesondere kraftstoff-foerderpumpe
US4649884A (en) 1986-03-05 1987-03-17 Walbro Corporation Fuel rail for internal combustion engines
US4804313A (en) * 1987-03-24 1989-02-14 Colt Industries Inc Side channel self priming fuel pump having reservoir
DE3925396A1 (de) * 1989-08-01 1991-02-07 Swf Auto Electric Gmbh Kraftstoffoerderpumpe
DE4020521A1 (de) 1990-06-28 1992-01-02 Bosch Gmbh Robert Peripheralpumpe, insbesondere zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeuges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9826184A1 *

Also Published As

Publication number Publication date
KR19990082290A (ko) 1999-11-25
WO1998026184A1 (de) 1998-06-18
JP2000505857A (ja) 2000-05-16
US6113362A (en) 2000-09-05
CN1209863A (zh) 1999-03-03
BR9707633A (pt) 1999-07-27
DE19651650A1 (de) 1998-06-18
CN1096572C (zh) 2002-12-18

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