[go: up one dir, main page]

EP0069912A1 - Dispositif d'alimentation de combustible pour moteurs à conbustion interne - Google Patents

Dispositif d'alimentation de combustible pour moteurs à conbustion interne Download PDF

Info

Publication number
EP0069912A1
EP0069912A1 EP82105740A EP82105740A EP0069912A1 EP 0069912 A1 EP0069912 A1 EP 0069912A1 EP 82105740 A EP82105740 A EP 82105740A EP 82105740 A EP82105740 A EP 82105740A EP 0069912 A1 EP0069912 A1 EP 0069912A1
Authority
EP
European Patent Office
Prior art keywords
fuel
pump
pressure
supply device
exhaust gas
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
EP82105740A
Other languages
German (de)
English (en)
Other versions
EP0069912B1 (fr
Inventor
Max Dr. Dr.-Ing. Straubel
Gerhard Dipl.-Ing. Stumpp
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 EP0069912A1 publication Critical patent/EP0069912A1/fr
Application granted granted Critical
Publication of EP0069912B1 publication Critical patent/EP0069912B1/fr
Expired legal-status Critical Current

Links

Images

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means

Definitions

  • the invention relates to a fuel supply device for internal combustion engines according to the preamble of the main claim.
  • fuel injection pumps it is known to cool the distributor pump and thus the fuel it delivers and which is supplied to the injection valves. This is particularly important if the fuel injection quantity is to be regulated by volumetric metering and a maximum output is to be obtained without exceeding the limits of the maximum permissible pollutant content in the exhaust gas.
  • a heating heat exchanger can also be considered, temperature sensors being provided which are used to cool the distributor injection pump Supply cooling used fuel via associated fuel lines.
  • Solcne fuel supply systems additionally work with a mostly mechanically controlled exhaust gas recirculation system, whereby a so-called exhaust gas test range is defined with reference to the engine speed, within which the exhaust gas recirculation, often controlled in terms of its extent, is effective, while at very high engine speeds that lie outside the test range Switching off the exhaust gas recirculation is desired.
  • This is often brought about by a suitable control of the exhaust gas recirculation based on the fuel quantity delivered by the fuel injection pump.
  • the arrangement of a cooler with the associated lines for the distributor pump is cumbersome and structurally as well as costly.
  • the fuel supply device with the characterizing features of the main claim has the advantage that the fuel temperature can be regulated to a substantially constant value in a particularly simple manner, the arrangement of a cooler with the associated lines can be saved. This results in an effective cooling of the pump, in particular in the critical area, that is to say at high speed, the overflow quantity being returned directly to the fuel reservoir.
  • the fuel injection pump is therefore always ventilated cleanly when predetermined operating ranges occur.
  • the ventilation line can also be fed directly back into the tank in push mode above the lower idling speed;
  • solenoid valves can be controlled by means of special pressure switches with an electrical output variable, whereby corresponding positions of the arbitrarily actuated accelerator pedal as well as operating states of the starter and an optionally provided thermal switch can be included at the start and in the cold running phase.
  • FIG. 1 shows a first exemplary embodiment of an operating state-dependent venting of a fuel injection pump with FIG. 1a, which shows the dependency 2 shows a second exemplary embodiment of the venting of a fuel injection pump in a schematic illustration with two different venting positions
  • FIG. 3 shows a variant of the illustration in FIG. 2 with pressure switches controlled by the pump interior with electrical output variables.
  • the fuel injection pump is designated by 1; it is supplied with fuel to supply an internal combustion engine (not shown) via a filter 2 and a fuel feed pump 3, which can also be a pre-feed pump or, if appropriate, can be completely omitted if a fuel feed pump itself is integrated in the fuel injection pump.
  • the fuel injection pump can be a known series injection pump, the fuel to be delivered to the internal combustion engine being removed in a known manner from the suction space of the injection pump during the suction stroke of the injection pump pistons. The amount of fuel that is not required during the injection stroke of the pump pistons, for example in the partial load range, is fed back into the suction space, the fuel in the suction space also being heated thereby in particular.
  • a fuel quantity meter 4 which is part of the mixture regulator, is usually connected between the filter 2 and the pump inlet; however, there is no need to go into this further will.
  • the mixture controller determines the mixture composition from the fuel delivered or supplied by the fuel injection pump 1 and can open a throttle valve in the intake pipe depending on the amount of fuel and, if necessary, at the same time also close the inlet opening of an exhaust gas recirculation line into the intake pipe.
  • FIG. 1a shows qualitatively the dependence of the pressure p pi in the pump interior over the engine speed n, the area shaded up to the speed n 1 below the curve course I representing the exhaust gas test area or CVS test area.
  • the venting switch 5 is preferably designed as a simple check valve and then comprises as the valve member a ball 5a which is pressed onto a seat by a spring 5b with a predetermined pressure, an overflow throttle 8 being able to be arranged in the inlet to the ball pressure valve.
  • the opening pressure p ö of the vent valve thus formed - this can also be a pressure regulator of any design - is in any case set so that it is above the pump pressure p pi developed at the highest speed n 1 in the exhaust gas test. Therefore, the internal combustion engine supplied with fuel by the fuel injection pump 1 is operated at a speed, for example in the full-load range, at which the venting valve opening pressure pö is equal to or less than the internal pressure of the pump then prevailing at this speed, then the venting valve opens and there is effective cooling of the pump in the critical area, since this is now additionally supplied with cool fuel from the fuel reservoir 7 used as a heat exchanger, namely in the amount as it comes back to the fuel storage tank 7 via the vent valve.
  • the fuel quantity meter 4 in the pump inlet now measures even a larger quantity of fuel than is actually consumed by the internal combustion engine, so that a larger proportion of fresh air is set by the mixture controller, while reducing or blocking the exhaust gas recirculation quantity.
  • the vent valve 5 must be designed so that it is essentially tight in the exhaust gas test area, that is, below the speed n 1 of FIG. 1a, in order to avoid that an incorrect air-fuel ratio may be set.
  • the vent valve 5 ' is also from the inside of the injection pump Pressure pp i controlled valve, but with two outputs 9a, 9b, the pressure control being carried out in two stages.
  • the vent valve 5 'of Figure 2 has a valve member in the form of a spring-loaded piston 10; the bias spring is designed as a compression spring and designated 11.
  • the bias spring is designed as a compression spring and designated 11.
  • Check valves 16 can be arranged in both outlet lines of the vent valve 5 '.
  • the vent valve 5 ' is also designed and set in the embodiment of FIG.
  • the exhaust gas recirculation system can be controlled in the same way via the fuel quantity meter as already explained with reference to FIG. 1; measures here too the fuel quantity meter always shows the total quantity of fuel supplied to the pump inlet, which also corresponds to the quantity supplied to the injection valves within the exhaust gas test range, while the overflow quantity (return quantity) is added outside the test range.
  • the mechanical vent valve is replaced by a solenoid valve 17, as a result of which peripheral peripheral conditions can still be detected.
  • the solenoid valve can only be designed as a switching solenoid valve and then works like the vent valve 5 of FIG. 1, the solenoid valve 17 being actuated via a pressure switch 18, which in turn is actuated by the internal pressure in the pump chamber. Above a predetermined pump interior pressure, i.e. Above, for example, the speed limit that results from the exhaust gas test area, the solenoid valve 17 then switches the venting circuit directly into the fuel reservoir 7 with the return of the overflow quantity.
  • the solenoid valve is designed as a switching solenoid valve, so that below the speed threshold the overflow quantity downstream of the fuel quantity meter 4 is fed back to the pump inlet via the connecting line 18, until then above the speed threshold and with the activation of effective cooling, the circuit via the fuel reservoir 7 when the pressure switch 18 responds.
  • two pressure switches actuated by the pump interior pressure can also be provided, the second pressure switch being designated by 20.
  • This can respond at a significantly lower speed threshold and open the overflow line to the fuel tank 7; In this case, however, it is connected in series with a switch 21 actuated by the accelerator pedal and is then used to additionally vent the fuel tank 7 above the idle speed in push mode.
  • the solenoid valve 17 can be switched on electrically, it can also be switched on, for example, when the starter is actuated, possibly also by a thermal switch (not shown) at the start and in the cold running phase of the internal combustion engine, so that, even in these operating states, the fuel tank 7 is switched to ventilation can be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP82105740A 1981-07-11 1982-06-29 Dispositif d'alimentation de combustible pour moteurs à conbustion interne Expired EP0069912B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813127543 DE3127543A1 (de) 1981-07-11 1981-07-11 "kraftstoffversorgungseinrichtung fuer brennkraftmaschinen"
DE3127543 1981-07-11

Publications (2)

Publication Number Publication Date
EP0069912A1 true EP0069912A1 (fr) 1983-01-19
EP0069912B1 EP0069912B1 (fr) 1985-01-09

Family

ID=6136747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105740A Expired EP0069912B1 (fr) 1981-07-11 1982-06-29 Dispositif d'alimentation de combustible pour moteurs à conbustion interne

Country Status (4)

Country Link
US (1) US4459964A (fr)
EP (1) EP0069912B1 (fr)
JP (1) JPS5818549A (fr)
DE (2) DE3127543A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1650412A3 (fr) * 2004-08-04 2009-07-01 hofer powertrain GmbH Réservoir d'huile avec dispositif de ventilation

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719831A1 (de) * 1987-06-13 1988-12-22 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
JPH0374569A (ja) * 1989-08-15 1991-03-29 Fuji Heavy Ind Ltd ガソリンエンジンの燃料噴射制御装置
US5269276A (en) * 1992-09-28 1993-12-14 Ford Motor Company Internal combustion engine fuel supply system
US5339787A (en) * 1993-02-26 1994-08-23 Westinghouse Electric Corporation Method and apparatus for distributing fuel in a diesel engine
JPH0749066A (ja) * 1993-08-05 1995-02-21 Nippondenso Co Ltd 内燃機関の燃料蒸気蒸散防止装置
JP3412347B2 (ja) * 1995-05-22 2003-06-03 三菱電機株式会社 排気ガス再循環制御弁
FR2774132B1 (fr) * 1998-01-27 2000-04-07 Semt Pielstick Dispositif pour eviter la cavitation dans les pompes a injection
DE10239777A1 (de) * 2002-08-29 2004-03-18 Robert Bosch Gmbh Einrichtung zur Entlüftung eines Förderaggregates
JP2007285235A (ja) * 2006-04-18 2007-11-01 Honda Motor Co Ltd ディーゼルエンジンの燃料供給装置
DE102006037174A1 (de) * 2006-08-09 2008-02-14 Robert Bosch Gmbh Vorrichtung und Verfahren zur Regelung eines Kraftstoffvolumenstroms in einem Niederdruckkreislaufsystem für eine Verbrennungskraftmaschine
JP5778475B2 (ja) * 2011-05-13 2015-09-16 アズビル株式会社 室圧制御システム

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE673809C (de) * 1936-06-16 1939-07-14 Bosch Gmbh Robert Brennstoff-Foerderanlage fuer Einspritzbrennkraftmaschinen
US3817273A (en) * 1970-05-22 1974-06-18 C Erwin Fuel system for diesel engines
DE2441570A1 (de) * 1974-08-30 1976-03-18 Kraft Georgsdorf Vorrichtung zum entlueften von einspritzpumpen
DE2658052A1 (de) * 1976-12-22 1978-07-06 Bosch Gmbh Robert Einrichtung zur lastabhaengigen betaetigung eines stellorgans
US4231342A (en) * 1979-01-29 1980-11-04 General Motors Corporation Diesel fuel heat recovery system and control valve therefor
FR2456223A1 (fr) * 1979-05-08 1980-12-05 Elf France Dispositif ameliorant le fonctionnement des moteurs diesel a basse temperature
DE2944165A1 (de) * 1979-11-02 1981-05-14 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum steuern der zusammensetzung des betriebsgemisches bei brennkraftmaschinen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1010189B (it) * 1973-05-02 1977-01-10 Bosch Gmbh Robert Impianto di iniezione del carbu rante per motori endotermici ad autoaccensione
US4286507A (en) * 1978-09-22 1981-09-01 Graaff Kommanditgesellschaft Shipping container construction
JPS5546010A (en) * 1978-09-26 1980-03-31 Diesel Kiki Co Ltd Temperature controller for fuel of pump in fuel injection apparatus
DE2841807A1 (de) * 1978-09-26 1980-04-03 Bosch Gmbh Robert Einrichtung zum regeln des mengenverhaeltnisses luft/kraftstoff bei brennkraftmaschinen
SU787711A1 (ru) * 1979-01-29 1980-12-15 Дизельный завод "Двигатель революции" Система прогрева топлива
DE2927110A1 (de) * 1979-07-05 1981-01-08 Audi Nsu Auto Union Ag Kraftstoff-einspritzanlage
JPS5647617A (en) * 1979-09-27 1981-04-30 Nissan Motor Co Ltd Exhaust cleaner
JPS57137644A (en) * 1981-02-19 1982-08-25 Mazda Motor Corp Exhaust gas recirculation device for diesel engine
US4373496A (en) * 1981-04-01 1983-02-15 Robert Bosch Gmbh Apparatus for controlling an exhaust recirculation device in internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE673809C (de) * 1936-06-16 1939-07-14 Bosch Gmbh Robert Brennstoff-Foerderanlage fuer Einspritzbrennkraftmaschinen
US3817273A (en) * 1970-05-22 1974-06-18 C Erwin Fuel system for diesel engines
DE2441570A1 (de) * 1974-08-30 1976-03-18 Kraft Georgsdorf Vorrichtung zum entlueften von einspritzpumpen
DE2658052A1 (de) * 1976-12-22 1978-07-06 Bosch Gmbh Robert Einrichtung zur lastabhaengigen betaetigung eines stellorgans
US4231342A (en) * 1979-01-29 1980-11-04 General Motors Corporation Diesel fuel heat recovery system and control valve therefor
FR2456223A1 (fr) * 1979-05-08 1980-12-05 Elf France Dispositif ameliorant le fonctionnement des moteurs diesel a basse temperature
DE2944165A1 (de) * 1979-11-02 1981-05-14 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum steuern der zusammensetzung des betriebsgemisches bei brennkraftmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1650412A3 (fr) * 2004-08-04 2009-07-01 hofer powertrain GmbH Réservoir d'huile avec dispositif de ventilation

Also Published As

Publication number Publication date
DE3261842D1 (en) 1985-02-21
US4459964A (en) 1984-07-17
EP0069912B1 (fr) 1985-01-09
JPS5818549A (ja) 1983-02-03
DE3127543A1 (de) 1983-01-20
JPH0435624B2 (fr) 1992-06-11

Similar Documents

Publication Publication Date Title
EP1180595B2 (fr) Système d'alimentation en carburant
DE69410457T2 (de) Kombiniertes diesel und natürliches gas kraftstoffkontrollsystem und anwendungs-verfahren
DE2262516C2 (de) Vorrichtung zur Verminderung der giftigen Bestandteile in Verbrennungsmotorabgasen
DE2462739C3 (de) Einrichtung zur dosierten Abgasrückführung bei einer Brennkraftmaschine
DE3020493A1 (de) Verfahren zum steuern des ansaugluftdurchsatzes bei einem brennkraftmotor
DE2617579A1 (de) Anlage zur abgasrueckfuehrung
EP0069912A1 (fr) Dispositif d'alimentation de combustible pour moteurs à conbustion interne
DE4025641C2 (de) System zur Steuerung der Kraftstoffeinspritzung für eine Brennkraftmaschine
DE4117675A1 (de) Ansaugluft-steuervorrichtung fuer eine brennkraftmaschine
DE3151970A1 (de) "einrichtung zum steuern des treibstoffstromes in einem verbrennungsmotor"
DE69820352T2 (de) System zur Steuerung der Leerlaufdrehzahl eines Verbrennungsmotors
DE3546310A1 (de) Startersystem fuer eine brennkraftmaschine
DE2621752B2 (de) Vergaser
DE3301319C2 (de) Drosselvorrichtung für die Ansaugluft bei einer Brennkraftmaschine mit Kraftstoffeinspritzung
DE3135108A1 (de) Vergaser fuer brennkraftmaschinen
DE3127419C2 (fr)
DE3435170C2 (de) Verfahren zur Steuerung eines Luft-Kraftstoff-Ansaugsystems mit veränderlichem Drall und mit einem geraden sowie schraubenförmigen Ansaugkanal für eine Brennkraftmaschine
DE4312331A1 (de) Kraftstoffeinspritzanlage für einen Verbrennungsmotor
DE69421974T2 (de) Gemischbildungsvorrichtung für gasbetriebene Brennkraftmaschinen
DE3036508A1 (de) Mehrzylindrige kolbenbrennkraftmaschine, insbesondere fremdgezuendete einspritzbrennkraftmaschine
DE3103119A1 (de) Brennkraftmaschine mit abgasrueckfuehrungssystem
EP0237754A1 (fr) Procédé de commande d'un dispositif d'injection de carburant et dispositif d'injection de carburant
DE3006258A1 (de) Kraftstoffeinspritzanlage
DE2936422C2 (fr)
DE3222439C2 (de) Einrichtung zur drehzahlabhängigen Schließbegrenzung einer Vergaser-Hauptdrossel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19820629

AK Designated contracting states

Designated state(s): DE FR GB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3261842

Country of ref document: DE

Date of ref document: 19850221

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

REG Reference to a national code

Ref country code: FR

Ref legal event code: DL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920505

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920629

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920825

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930629

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST