EP0150138A2 - Sicherheitsvorrichtung für Gleichdruckeinspritzventil einer Brennkraftmaschine - Google Patents

Sicherheitsvorrichtung für Gleichdruckeinspritzventil einer Brennkraftmaschine Download PDF

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Publication number
EP0150138A2
EP0150138A2 EP85400023A EP85400023A EP0150138A2 EP 0150138 A2 EP0150138 A2 EP 0150138A2 EP 85400023 A EP85400023 A EP 85400023A EP 85400023 A EP85400023 A EP 85400023A EP 0150138 A2 EP0150138 A2 EP 0150138A2
Authority
EP
European Patent Office
Prior art keywords
piston
ball
safety device
injected
injection
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Withdrawn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
EP85400023A
Other languages
English (en)
French (fr)
Other versions
EP0150138A3 (de
Inventor
Jean-Pierre Jourde
Marc Miettaux
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.)
Renault SA
Original Assignee
Renault SA
Regie Nationale des Usines Renault
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 Renault SA, Regie Nationale des Usines Renault filed Critical Renault SA
Publication of EP0150138A2 publication Critical patent/EP0150138A2/de
Publication of EP0150138A3 publication Critical patent/EP0150138A3/de
Withdrawn legal-status Critical Current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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/0215—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by draining or closing fuel conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7869—Biased open

Definitions

  • the invention relates to safety devices carried by the injection valves of internal combustion engines.
  • the injection principle known as "Pressure-Time” is known, characterized by the use of injection valves, supplied under a normally constant pressure, delivering an amount of fuel in proportion to their opening time.
  • Injection valves of this kind have the disadvantage that in the event of needle seizure, rupture of the injector nozzle or failure of the control system, it is no longer possible to regulate the quantity of fuel injected, the engine can then suffer major damage.
  • a known device of this type is described in patent FR 1 555 369. It consists of an apparatus placed in the inlet pipe of the injection valve and / or in the exhaust pipe of the / or control which are electromagnetically actuated, which closes one or other of the lines described above, this in case of exceeding the maximum admissible quantity of fuel injected.
  • This equipment mainly consists of a piston moving in a bore.
  • This piston is held on one side by a spring, a pipe comprising a restriction is formed parallel to the bore of the piston, this pipe opens into the bore on the spring side.
  • the side of the piston opposite the spring is connected to the fuel inlet and to the other end of the pipe designated above; the face of the piston, spring side, is in communication with the injection valve.
  • the injection valve When the injection occurs, the pressure drops on the face of the piston causing the latter to move by compressing the spring, at the end of injection the piston is brought back by the spring.
  • the piston performs a movement such that it closes the pipe described above, thus interrupting the flow.
  • the restriction provided in the pipeline is provided so that the piston can be returned to its original position under the action of the spring between two successive injections, even at the highest speed of the engine.
  • the invention aims to limit injection when the quantity of fuel injected exceeds a maximum admissible value but also when the engine speed exceeds a given level.
  • this safety device closes the main supply line for the electromagnetically controlled injection valve, permanently and permanently in the event of the maximum admissible quantity of fuel being exceeded. injected or exceeding the order frequency for a given injected quantity, less than the maximum admissible quantity.
  • this safety device comprises a ball, a piston provided with a calibrated orifice arranged in series with the main pipe, a guide sleeve for this piston and a return spring for this piston, these constituent elements being assembled so as to allow on the one hand, this piston to travel during each injection, a path varying according to the quantity delivered and to return to the rest position between two successive injections by the action of this spring , and secondly, this ball to close the single section of passage of this sleeve as soon as the stroke of the piston reaches a preset value corresponding to a maximum admissible quantity injected.
  • the safety device for a constant pressure injection valve of an internal combustion engine shown in FIG. 1, comprises a ball 2 of diameter D resting on a hollow piston 4 quid by a sleeve 6 and recalled by an inner spring 8.
  • This piston has a calibrated orifice with nozzle 10 of diameter d which connects the inlet 12 of the main pipe 14 supplying a non-electromagnetic control valve shown, at exit 16 of the safety device.
  • the sleeve 6 is made of a metal that is relatively softer than the material of the ball 2 and the diameter D ′ for guiding the piston or internal diameter of the sleeve is slightly less than that D of the ball.
  • the center of the ball 2 is separated from the edge 18 of the sleeve 6 by a maximum distance X + E ( ⁇ > 0), X representing the maximum displacement of this ball until contact with the sleeve 6.
  • the piston is arranged above the ball itself raised by the return spring.
  • FIG. 3 Another constructive arrangement illustrated in FIG. 3 can be adopted by leaving a clearance between the ball and the bore 20 in which it moves, such that the passage section thus defined is identical to that of the nozzle 10 represented in FIGS. 1 and 2.
  • Figure 4 shows the movement of the ball 2 bearing on the piston 4, as a function of time. This movement and the injection rate shown in FIG. 5 are synchronized for a duration of time Ti.
  • the return time of the ball under the effect of the return spring corresponds to Tr.
  • the sum Ti + Tr is provided at a value slightly less than an injection period.
  • the value X represents the maximum stroke of the ball, provided to allow the maximum amount of fuel to be injected, which causes the locking of the safety device.
  • Figures 6, 7 and 8 illustrate a case of exceeding the maximum amount injected resulting in safety.
  • the second pulse of the control signal shown in Figure 6 for an electromagnetic valve is too long; the injection time Ti then reaches a fixed value Tm causing a maximum displacement X of the ball, which causes the safety device (cf. FIGS. 7 and 8).
  • Figures 9, 10 and 11 illustrate a case of exceeding the engine speed resulting in safety.
  • Figure 9 shows the periodic control signal of an electromagnetic valve.
  • Figure 10 shows the quantity injected as a function of time.
  • the period Pc of the control signal is less than the sum (Ti + Tr) representing the period specific to the safety device.
  • the displacement of the ball increases by the value x.
  • the device goes into safety (Xi represents the initial displacement of the ball and n the number of abnormal injections).
  • FIG. 12 shows the overall operation of the safety device with the point Qi indicating the maximum quantity that can be injected, the point Ni indicating the start of the regression of the maximum flow rate as a function of the speed, the point Nm indicating the maximum speed that can theoretically be obtained with a very small amount injected.
  • the engine operating limits must be limited to this trapezoid, for example the OQMN rectangle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP19850400023 1984-01-23 1985-01-08 Sicherheitsvorrichtung für Gleichdruckeinspritzventil einer Brennkraftmaschine Withdrawn EP0150138A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8400973 1984-01-23
FR8400973A FR2558533B1 (fr) 1984-01-23 1984-01-23 Dispositif de securite pour soupape d'injection de moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0150138A2 true EP0150138A2 (de) 1985-07-31
EP0150138A3 EP0150138A3 (de) 1985-09-11

Family

ID=9300373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850400023 Withdrawn EP0150138A3 (de) 1984-01-23 1985-01-08 Sicherheitsvorrichtung für Gleichdruckeinspritzventil einer Brennkraftmaschine

Country Status (5)

Country Link
US (1) US4589393A (de)
EP (1) EP0150138A3 (de)
JP (1) JPH0637865B2 (de)
ES (1) ES8606578A1 (de)
FR (1) FR2558533B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551403A (en) * 1994-08-04 1996-09-03 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Fuel supply quantity limiting arrangement
DE19747092A1 (de) * 1997-10-24 1999-04-29 Siemens Ag Durchflußbegrenzungsvorrichtung für Brennkraftmaschinen

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69218326T2 (de) * 1991-01-14 1997-08-28 Denso Corp Druckakkumulier-kraftstoffeinspritzvorrichtung
DE4211651B4 (de) * 1992-04-07 2004-11-18 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung, insbesondere Pumpedüse für Brennkraftmaschinen
US5412948A (en) * 1992-10-23 1995-05-09 Honda Giken Kogyo Kabushiki Kaisha Hydrostatic continuously variable transmission
DE4414242A1 (de) * 1994-04-23 1995-10-26 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE29502829U1 (de) * 1995-02-21 1996-06-20 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
JP3521811B2 (ja) 1999-08-05 2004-04-26 株式会社デンソー 内燃機関の安全装置
FI114501B (fi) * 2001-06-27 2004-10-29 Waertsilae Finland Oy Polttoainejärjestelmän virtausrajoitinventtiili
WO2005008059A1 (de) * 2003-07-17 2005-01-27 Ganser-Hydromag Ag Brennstoffeinspritzventil für brennkraftmaschinen
WO2008012082A2 (de) * 2006-07-25 2008-01-31 Aros Hydraulik Gmbh Steuerungssystem für ein hydraulisches element
US7658179B2 (en) * 2008-05-28 2010-02-09 Caterpillar Inc. Fluid leak limiter
US7661410B1 (en) * 2008-08-18 2010-02-16 Caterpillar Inc. Fluid leak limiter
US11346313B2 (en) * 2020-09-03 2022-05-31 Caterpillar Inc. Fuel flow limiter assembly having integral fuel filter and fuel system using same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225175A (en) * 1939-05-01 1940-12-17 Charles A Koerner Motor shutoff
US3583384A (en) * 1969-07-01 1971-06-08 Alden B Ranisate Stove attachment
DE2103948A1 (de) * 1971-01-28 1972-09-14 Kupex Ag Automatisches Ventil
ES177456Y (es) * 1971-02-19 1973-03-01 C. A. V. Limited Disposicion de inyeccion de combustible.
US3845785A (en) * 1971-04-26 1974-11-05 Dover Corp Spring biased safety valve
US3977430A (en) * 1974-08-22 1976-08-31 Bushee Joseph J Ball check valve construction with pressure-responsive reset means
US4010770A (en) * 1976-03-01 1977-03-08 W-K-M Wellhead Systems, Inc. Velocity flow control valve for fluid line
DE2754615A1 (de) * 1977-12-08 1979-06-13 Bosch Gmbh Robert Absperrvorrichtung fuer mindestens ein einspritzventil fuer verbrennungsmotoren
JPS56173737U (de) * 1980-05-26 1981-12-22
JPS57105550A (en) * 1980-12-19 1982-07-01 Nissan Motor Co Ltd Fuel injection pump for diesel engine
FR2502701A1 (fr) * 1981-03-26 1982-10-01 Renault Vehicules Ind Systeme d'injection a pilotage de l'injecteur, pour un moteur a combustion interne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551403A (en) * 1994-08-04 1996-09-03 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Fuel supply quantity limiting arrangement
DE19747092A1 (de) * 1997-10-24 1999-04-29 Siemens Ag Durchflußbegrenzungsvorrichtung für Brennkraftmaschinen
DE19747092B4 (de) * 1997-10-24 2005-01-13 Siemens Ag Durchflußbegrenzungsvorrichtung für Brennkraftmaschinen

Also Published As

Publication number Publication date
JPH0637865B2 (ja) 1994-05-18
JPS60159366A (ja) 1985-08-20
ES539735A0 (es) 1986-04-01
FR2558533A1 (fr) 1985-07-26
ES8606578A1 (es) 1986-04-01
FR2558533B1 (fr) 1986-06-13
US4589393A (en) 1986-05-20
EP0150138A3 (de) 1985-09-11

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Inventor name: MIETTAUX, MARC

Inventor name: JOURDE, JEAN-PIERRE