EP0916022B1 - Coupe-circuit pour moteur a combustion interne - Google Patents

Coupe-circuit pour moteur a combustion interne Download PDF

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Publication number
EP0916022B1
EP0916022B1 EP97938863A EP97938863A EP0916022B1 EP 0916022 B1 EP0916022 B1 EP 0916022B1 EP 97938863 A EP97938863 A EP 97938863A EP 97938863 A EP97938863 A EP 97938863A EP 0916022 B1 EP0916022 B1 EP 0916022B1
Authority
EP
European Patent Office
Prior art keywords
valve body
fuel injection
injection system
engine
inlet port
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
EP97938863A
Other languages
German (de)
English (en)
Other versions
EP0916022A1 (fr
Inventor
Herbert Geier
Günter Kampichler
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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 Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP0916022A1 publication Critical patent/EP0916022A1/fr
Application granted granted Critical
Publication of EP0916022B1 publication Critical patent/EP0916022B1/fr
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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection system for an internal combustion engine, in which for engine shutdown an interruption in fuel supply is provided.
  • Engine shutdowns or engine emergency shutdowns are already from the prior art, e.g. for the Operating truck diesel engines, known.
  • Such Devices are primarily for auto-igniting Internal combustion engines necessary to the engine shutdown or the engine in emergency situations turn off mechanically or automatically.
  • the engine is switched off by self-igniting Internal combustion engines the fuel supply interrupted, as this effectively continues can be prevented.
  • the injection pump is set to zero delivery, or through so-called fuel shut-off valves.
  • These valves are in the supply line to the injection pump, if possible immediately in front, attached and interrupt the Fuel supply with the disadvantage that the remaining Fuel volume between injection pump and Valve must be consumed and therefore the engine one runs for a certain time or overclocked. This is therefore not suitable for an emergency stop.
  • JP 06336962 A An attempt to avoid these disadvantages is given in JP 06336962 A is undertaken. It becomes spherical Valve body described on a return cable are attached. In the event of a trigger, the Valve body due to the negative pressure in the valve seat be sucked into the suction hole. Another Attempt the above To avoid disadvantages is in the DE 3122250 A1 undertaken. In it becomes an electric actuated, guided in a bore valve to Interruption of fuel supply proposed.
  • GB 996032 A also describes Emergency shutdown valve for an injection pump, the is operated electromagnetically. With this valve the fuel supply is rigid only valve tappet with little play between Fuel pump and distributor interrupted.
  • US-A-4497298 describes a pump control valve which prevents "valve pounding" should be that a damping material over a certain length of the valve stem is used.
  • the object of the present invention is now a simple and inexpensive engine shutdown or to provide a quick emergency stop, the also insensitive to assembly tolerances is.
  • the fuel injection system has a pump element with suction hole, whereby for interruption the fuel supply, the suction hole on the pump element is lockable and for closing the a self-centering suction hole forming a valve seat Valve body is provided, the Valve body attached to a flexible tappet is.
  • the self-centering valve body guaranteed in a surprisingly simple way that the suction hole is always securely sealed regardless of the exact location caused by the Screw-in position of the fuel injection pump in the Housing is defined and thus certain assembly tolerances subject to.
  • the present invention further provides that the self-centering valve body is conical or has a hemispherical sealing surface.
  • valve body fits in advantageously the conical or hemispherical trained valve seat of the suction hole.
  • the flexible Plunger is designed as a spring plunger.
  • the plunger can either be made of spring steel or a flexible plastic material or any other suitable elastic material.
  • the valve body itself can then e.g. over a shaft be connected to the plunger.
  • valve body is spring loaded.
  • an embodiment according to the invention provides before that the engine shutdown can be operated manually is.
  • the valve body can, for example, have a Bowden cable are brought into the closed position.
  • the Engine shutdown can be controlled automatically.
  • the shutdown takes place automatically when faults occur, e.g. to low oil pressure, excessive cylinder head temperature, Overspeed, etc.
  • the shutdown in generally take place via a regulation in which a Signaling device indicates the fault and the emergency shutdown activated.
  • the suction hole by electrical actuation of the valve body, e.g. B. powerless, lockable.
  • Figure 1 shows an "engine quick stop” or engine shutdown device 1, which is operated electrically.
  • 1 is the fuel injection pump 2 with the suction bore designed as a valve seat 3 shown leading to the fuel supply channel 4 is screwed open into the housing 5.
  • the fuel supply channel 4 is the plunger 6, at its front end, the valve body 7 located.
  • the electric engine shutdown device 1 is flanged to the housing 5 via screws 8.
  • the seal 9 prevents that fuel from the fuel supply channel 4th exit.
  • the compression spring 25 slides over the core 11 when the power is switched off, the plunger 6 in the direction of Suction hole 3. Furthermore, the fuel return channel 12 recognizable.
  • the engine shutdown device 13 mechanically operated.
  • the one with the injection pump 2 connected components and the Suction hole 3 and the valve body 7 correspond to the Components already described in Fig. 1, so that on these parts are not described again shall be.
  • the engine shutdown device 13 has the valve body 7, which with the flexible plunger 6th is connected and guided by the guide body 14 is, the sealing ring 15 and the pressure plate 16, the is connected to the housing 5 by screws 17, on. Furthermore, is connected to the plunger 6 Pressure pin 18, which is provided with a casing 19 is shown, which with a compression spring 26 in Standby position is held.
  • valve body 7 By pressing the push pin 18 elastic plunger 6 with the valve body 7 in Moved towards the suction hole 3, the Spring pressure of the spring 26 must be overcome. By Installation tolerances and due to settings the center line of the plunger 6 does not pass through the center the bore 3. Due to its hemispherical design the valve body 7 automatically centers itself in the conical valve seat of the suction hole 3 The valve body 7 first touches an edge of the Valve seat of the suction hole 3. Through the conical Shape of the valve seat and a corresponding Low-friction surface quality can also be avoided Material with low-friction surface properties manufactured valve body 7 slide into the valve seat. The plunger 6 deforms elastically.
  • Fig. 3 shows a detailed representation of the elastic Tappet 6, which is helical and the valve body 7 at one end thereof is connected via a shaft 20. Furthermore 3 shows the pump neck 21 with the suction bore 3, which has a conical valve seat 22. Moreover is a leak hole 23 on the suction hole 3 opposite pump neck side recognizable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Installation d'injection de carburant pour un moteur à combustion interne dans lequel il est prévu, pour couper le moteur, une interruption de l'alimentation en carburant, l'installation d'injection de carburant comprenant un élément de pompe avec un orifice d'aspiration (3), l'orifice d'aspiration (3) dans l'élément de pompe pouvant être obturé pour interrompre l'alimentation en carburant et un obturateur (7) auto-centrant étant prévu pour obturer le trou d'aspiration (3) qui forme un siège de soupape, caractérisée en ce que l'obturateur (7) est monté sur un poussoir (6) flexible, élastique, afin de permettre un auto-centrage même en cas de décalage résultant du montage entre l'axe du poussoir (6) et le centre de l'orifice d'aspiration (3).
  2. Installation d'injection de carburant selon la revendication 1, caractérisée en ce que l'obturateur (7) auto-centrant présente une surface d'étanchéité conique ou hémisphérique.
  3. Installation d'injection de carburant selon la revendication 1, caractérisée en ce que le poussoir (6) flexible est conformé en poussoir à ressort.
  4. Installation d'injection de carburant selon la revendication 1, caractérisée en ce que l'obturateur (7) est sollicité par un ressort.
  5. Installation d'injection de carburant selon la revendication 1, caractérisée en ce que l'orifice d'aspiration (3) peut être obturé par actionnement mécanique de l'obturateur (7).
  6. Installation d'injection de carburant selon la revendication 1, caractérisée en ce que la coupure du moteur peut être déclenchée de manière automatique.
  7. Installation d'injection de carburant selon la revendication 1, caractérisée en ce que l'orifice d'aspiration (3) peut être obturé par actionnement électrique de l'obturateur (7).
EP97938863A 1996-08-05 1997-08-01 Coupe-circuit pour moteur a combustion interne Expired - Lifetime EP0916022B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19631655A DE19631655C2 (de) 1996-08-05 1996-08-05 Motorabschaltung für eine Brennkraftmaschine
DE19631655 1996-08-05
PCT/EP1997/004208 WO1998005862A1 (fr) 1996-08-05 1997-08-01 Coupe-circuit pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0916022A1 EP0916022A1 (fr) 1999-05-19
EP0916022B1 true EP0916022B1 (fr) 2001-12-19

Family

ID=7801883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97938863A Expired - Lifetime EP0916022B1 (fr) 1996-08-05 1997-08-01 Coupe-circuit pour moteur a combustion interne

Country Status (5)

Country Link
US (1) US6101997A (fr)
EP (1) EP0916022B1 (fr)
JP (1) JP2000515602A (fr)
DE (2) DE19631655C2 (fr)
WO (1) WO1998005862A1 (fr)

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE295420C (fr) *
GB996032A (en) * 1962-10-08 1965-06-23 Cav Ltd Liquid fuel pumps for internal combustion engines
GB1109387A (en) * 1964-06-30 1968-04-10 Schwermaschb Karl Liebknecht Improvements in or relating to devices for cutting off the fuel supply in injection type internal combustion engines
US3472481A (en) * 1965-10-22 1969-10-14 Air Reduction Self-aligning valve closure
DE2503345C2 (de) * 1975-01-28 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe für Brennkraftmaschinen
US4196886A (en) * 1975-07-21 1980-04-08 Industrial Electronic Rubber Co. Fluid control valve
DE3014712A1 (de) * 1980-04-17 1981-10-22 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung zum stillsetzen einer dieselbrennkraftmaschine
DE3122250A1 (de) * 1981-06-04 1982-12-23 Robert Bosch Gmbh, 7000 Stuttgart Ueberdrehsicherung fuer kraftstoffeinspritzpumpen von brennkraftmaschinen
JPH0650090B2 (ja) * 1983-05-17 1994-06-29 日産自動車株式会社 分配型燃料噴射ポンプの燃料遮断弁
US4497298A (en) * 1984-03-08 1985-02-05 General Motors Corporation Diesel fuel injection pump with solenoid controlled low-bounce valve
DE3427730A1 (de) * 1984-07-27 1986-02-06 Motorenfabrik Hatz Gmbh & Co Kg, 8399 Ruhstorf Kraftstoff-einspritzsystem
DE3719831A1 (de) * 1987-06-13 1988-12-22 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
US4871989A (en) * 1988-04-15 1989-10-03 Synchro-Start Products, Inc. Solenoid with manual actuation mechanism
DE3843862A1 (de) * 1988-12-24 1990-06-28 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3844452A1 (de) * 1988-12-31 1990-07-05 Bosch Gmbh Robert Verteilerkraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3937709A1 (de) * 1989-11-13 1991-05-16 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
JP2861429B2 (ja) * 1991-02-27 1999-02-24 株式会社デンソー ディーゼル機関の蓄圧式燃料噴射装置
US5168957A (en) * 1991-06-17 1992-12-08 Ross Gilbert B Vehicle theft deterrent apparatus and method
JPH0560033A (ja) * 1991-08-30 1993-03-09 Yanmar Diesel Engine Co Ltd 内燃機関の燃料噴射装置
DE4129828C1 (fr) * 1991-09-07 1993-04-29 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
JPH06336962A (ja) * 1993-05-28 1994-12-06 Kubota Corp ディーゼルエンジンのエンジン停止装置
JP3575124B2 (ja) * 1995-08-09 2004-10-13 株式会社デンソー 内燃機関用燃料供給装置

Also Published As

Publication number Publication date
JP2000515602A (ja) 2000-11-21
DE59705902D1 (de) 2002-01-31
DE19631655A1 (de) 1998-02-12
US6101997A (en) 2000-08-15
EP0916022A1 (fr) 1999-05-19
DE19631655C2 (de) 2003-03-27
WO1998005862A1 (fr) 1998-02-12

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