EP0392187B1 - Dispositif de contrôle pour arrêter un moteur à combustion interne diesel - Google Patents

Dispositif de contrôle pour arrêter un moteur à combustion interne diesel Download PDF

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Publication number
EP0392187B1
EP0392187B1 EP90104259A EP90104259A EP0392187B1 EP 0392187 B1 EP0392187 B1 EP 0392187B1 EP 90104259 A EP90104259 A EP 90104259A EP 90104259 A EP90104259 A EP 90104259A EP 0392187 B1 EP0392187 B1 EP 0392187B1
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EP
European Patent Office
Prior art keywords
valve
suction
control device
feed pump
pressure
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
EP90104259A
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German (de)
English (en)
Other versions
EP0392187A1 (fr
Inventor
Heinz Dipl.-Ing. Kuschmierz
Reinhard Dipl.-Ing. Fenchel
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0392187A1 publication Critical patent/EP0392187A1/fr
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Publication of EP0392187B1 publication Critical patent/EP0392187B1/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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

Definitions

  • the invention relates to a control device for stopping a diesel internal combustion engine according to the generic preamble of the main claim.
  • Such a control device is already known from DE-OS 30 14 712, in which the delivery pump can be reversed by means of a reversing valve for stopping the internal combustion engine and the suction chamber of the fuel injection pump is connected to the suction side of the delivery pump and the pressure side of the delivery pump to the tank.
  • This device is intended to generate a vacuum in the suction space, supplemented by two vacuum-tight check valves, one in the inlet and one in the return of the fuel injection pump. So much fuel is withdrawn from the suction space of the fuel injection pump that the fuel injection pump can no longer deliver fuel and the diesel engine stops.
  • the reversing valve is a separate component which is separate from the feed pump and to which four lines are assigned at its connections.
  • These many hose connections can be the starting point of malfunctions of the Be an internal combustion engine, especially if one takes into account the vibration stress of a diesel unit and the associated load on the line connection points.
  • control device designed with the characterizing features of the main claim, has the advantage over the prior art that the previous management effort of the control device can be eliminated.
  • the arrangement and design of the control device according to the invention as a unit integrated into the feed pump improves the functional and operational safety of the injection system for the internal combustion engine with a reduced maintenance effort derived therefrom, on the other hand there are structural advantages due to the simplified design of the control device and a reduced space requirement and economic advantages due to the reduced material and assembly costs.
  • FIG. 1 The first exemplary embodiment of the control device is shown in FIG. 1 in a normal operating position and in FIG. 2 in a stop position, while in FIG. 3 the second exemplary embodiment of the control device is again shown in the normal operating position.
  • the first exemplary embodiment shown schematically in FIG. 1, shows a feed pump 10, which is inserted into the fuel circuit of a fuel injection pump 9 for operating an internal combustion engine and is known per se and which, in normal use, is mounted on the injection pump in the engagement area of a cam 11.
  • the feed pump 10, which works on the displacement principle, is encompassed by a pump housing 12 and the force is introduced into the feed pump 10 by means of the stroke of the cam 11 via a piston rod 14 onto a feed piston 16 which can be displaced in the direction of an arrow 18.
  • the delivery piston 16 During its inward stroke, in the direction of arrow 18, the delivery piston 16 is displaced counter to the restoring force of a prestressed working spring 20, the delivery piston 16 moving fuel into a working space 22 when the delivery pump 10 is ready for operation.
  • the working space 22 is delimited by one end face of the delivery piston 16, a suction valve 25 which, in the closed state, blocks the working space 22 from a suction line 26 connected to the tank 27 and by a pressure valve 28 and accommodates a stationary bearing block 24 .
  • the other end of the delivery piston 16 closes a displacement chamber 30 in the pump housing 12, which opens into a pressure line 32, which in turn is connected to a suction chamber 33 of the fuel injection pump 9.
  • the suction valve 25 forms a switching element 34 in a rigid coupling by means of a coupling member 60 with the pressure valve 28.
  • the suction valve 25 has a first valve seat support 35 which forms an interior 36 in which a valve closing member 38 is arranged with a base body 40 designed as a plate
  • the base body 40 carries closing surfaces 42, 44 formed on both sides as ring seat surfaces, a front closing surface 42 facing the suction line 26 and a rear closing surface 44 facing the working space 22. Both closing surfaces 42, 44 are opposite corresponding valve seats 43, 45 on the first valve seat carrier 35, and a front valve seat 43 and a rear valve seat 45.
  • a guide element 46 is attached to the base body 40 in the center thereof, perpendicular to the closing surfaces 42, 44, which is guided in a first bore 48 of the bearing block 24 and here for a valve spring 50 a first spring abutment 51 forms.
  • This valve spring 50 partially surrounds the guide element 46 and presses against the base body 40 on the side of the rear closing surface 44.
  • the base body 40 In extension to the valve spring 50, the base body 40 is opposed on the side of the front closing surface 42 by an additional valve spring 52 which is supported on a first auxiliary spring abutment 53 fixed to the housing and whose length dimension is not sufficient to engage the base body in the first exemplary embodiment shown in FIG 40 to come.
  • the first valve seat carrier 35 has a sealing displaceability within the working space 22 on its outer contour.
  • the first valve seat support 35 is rigidly coupled to a part of the pressure valve 28, a second valve seat support 65 via the coupling member 60, which can be displaced by a control element 62 connected to it within a bearing in the bearing block 24 in the direction of movement of the first guide element 46.
  • the pressure valve 28 is constructed in the same way as the suction valve 25 and thus has the same assignment and corresponding design: the second valve seat carrier 65, an interior 66, a valve closing member 68, a base body 70, an annular front closing surface 72, a front valve seat 73, an annular rear closing surface 74, a rear valve seat 75, a guide element 76 which is guided in a second bore 78, which runs in the pump housing 12, with a valve spring 80, a second spring abutment 81, an additional valve spring 82, which is on a second Additional spring abutment 83, which is formed on the valve body 24, supports and whose length dimension is not sufficient to come into engagement with the base body 70 in the first exemplary embodiment shown in FIG.
  • the volume flowing out of the working chamber 22 does not reach the pressure line 32, since it essentially compensates for the vacuum level left in the displacement chamber 30 by the delivery piston 16.
  • a delivery from the tank 27 via the feed pump 10 to the fuel injection pump 9 is thus shown.
  • the described delivery direction of the feed pump 10 is reversible by moving the actuator 62 in the direction of arrow 90 and the switching element 34 rigidly coupled to it from a normal operating position as shown in FIG. 1 to a stop position as shown in FIG. 2.
  • the two valve seat supports 35, 65 in the illustration according to FIG. 2 come into a position in which the pressure valve 28 takes over the function of a suction valve and the suction valve 25 takes over the function of a pressure valve.
  • the displacement of the two valve seat supports 35, 65 also changes the position of the two valve closing members 38, 68, both base bodies 40, 70 detaching from the front valve seats 43, 73 with their front closing surfaces 42, 72 and with their rear closing surfaces 44, 74 come into contact with the rear valve seats 45, 74, lose the frictional connection with the valve springs 50, 80 and come into engagement with the additional valve springs 52, 82.
  • the pressure valve 28 which works as a suction valve, opens and the fuel ejected can flow into the working space 22, where it largely compensates for the negative pressure created by the volume expansion of the working space 22.
  • FIG. 3 In a constructive modification of the first exemplary embodiment according to FIGS. 1 and 2, a functionally equivalent solution is disclosed in FIG. 3 on the basis of a second exemplary embodiment.
  • FIG. 3 corresponding to FIG. 1, the normal operating position of the coupling member 160 is shown; However, its stop position is no longer shown, since the associated action sequences in the feed pump 110 run in the same sense as shown in FIG. 2 in the first exemplary embodiment.
  • the suction valve is 125 and that Modified pressure valve 128 so that the two valve seat supports 135, 165 are fixed to the housing and the switching function is performed by the movable spring abutments 151, 181 or additional spring abutments 153, 183, which can also be arranged offset by 90 °.
  • the spring abutments 151, 181 and additional abutments 153, 183 are connected to the coupling member 160, which can be moved by the actuator 62 from the normal operating position shown in the stop position.
  • valve springs 150, 180 load the base body 140, 170, so that the suction valve 125 and the pressure valve 128 are initially closed.
  • the spring abutments 151, 181 or additional spring abutments 153, 183 are displaced such that the base bodies 140, 170 lose the frictional connection to the valve springs 150, 180 and under the action of force the additional valve springs 152, 182 come, whereby the function reversal is achieved in the suction valve 125 and in the pressure valve 128 and thus also in the feed pump 110.
  • control device as a structural unit integrated in the feed pump 10, 110 improves the functional and operational safety of the injection system for the internal combustion engine and achieves economic advantages through reduced material and assembly costs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (5)

1°) Installation de commande de l'arrêt d'un moteur Diesel comprenant une pompe d'alimentation (10) qui en fonctionnement nornal prend du carburant par une conduite d'aspiration (26) dans un réservoir (27) et lors de la course de refoulement, fournit ce carburant par une conduite de pression (32) à une chambre d'aspiration (33) d'une pompe d'injection (9), le corps (12) de la pompe ayant dans une chambre utile (22) au moins une soupape d'aspiration (25) et une soupape de pression (28) avec un élément de commutation (34) qui agit sur le sens de transfert efficace de la pompe d'alimentation (10), cet élément de commande pouvant être commuté d'une position de fonctionnement normal qui n'influence pas le transfert de carburant de la pompe d'alimentation (10), de la conduite d'aspiration (26) vers la conduite de pression (32) et qui peut être commuté dans une position d'arrêt pour laquelle il se produit une inversion de fonctionnement pour laquelle la pompe d'alimentation (10) aspire le carburant de la chambre d'aspiration (33) de la pompe d'injection (9) et le renvoie au réservoir (27), installation caractérisée en ce que l'élément de commutation (34) est intégré à la pompe d'alimentation (10) et est relié à au moins deux soupapes (25, 28) par un organe de couplage (60), en pouvant être coulissé par un organe de commande (62) dans la position d'arrêt dans laquelle les soupapes (25, 28) arrivent dans une position telle que les ressorts de soupape (50, 60) de la soupape d'aspiration (25) et de la soupape de pression (28) n'agissent pas et que chaque ressort complémentaire de soupape (52, 82) vienne en action, et l'effet de la force qu'ils exercent fait fonctionner la soupape d'aspiration (25) comme soupape de pression et la soupape de pression (28) comme soupape d'aspiration, pour que la pompe de transfert (10) aspire le carburant de la conduite de pression (32) et l'envoie à la conduite d'aspiration (26).
2°) Installation de commande selon la revendication 1, caractérisée en ce que chacune des deux soupapes (25, 26) possède un support de siège de soupape (35, 65) permettant au niveau de son contour extérieur, une possibilité de coulissement étanche dans le volume utile (22) de la pompe d'alimentation (10), le premier support de siège de soupape (35) délimitant la chambre utile (22) par rapport au réservoir (27) et le second support de siège de soupape (65) délimitant la chambre utile (22) par rapport à la chambre d'aspiration (33) de la pompe d'injection de carburant (9) et en ce que dans chacun des supports de siège de soupape (35, 65) il y a un volume intérieur (36, 66) avec deux sièges de soupape opposés (43 , 45 ; 73, 65) contre les surfaces d'étanchéité desquelles vient en appui, en alternance un organe de fermeture de soupape (38, 68) à double effet (figures 1,2).
3°) Installation de commande selon la revendication 1, caractérisée en ce que chacune des deux soupapes (125, 128) comporte deux paliers d'appui de ressort (151, 453 ; 181, 183) recevant chacun une extrémité des ressorts de soupape (150, 180) et des ressorts complémentaires de soupape (152, 182) ainsi qu'un support de siège de soupape fixe (135, 165) se trouvant entre les paliers d'appui de ressort (151, 153, 181, 183), les deux supports fixes comportant chacun dans une chambre intérieure (36, 66), deux sièges de soupape (43, 45 ; 73, 75) opposés l'un à l'autre, et contre les surfaces d'étanchéité desquelles viennent en alternance en appui les surfaces d'obturation (42, 44, 72, 74) de chaque organe d'obturation de soupape (138, 168) à savoir dans le cas d'un organe de couplage (160) en position normale de fonctionnement, sous l'action des ressorts de soupape (150, 180) ou après inversion de l'organe de couplage (160) par l'organe de commande dans sa position d'arrêt sous l'action des ressorts complémentaires de soupape (152, 182) (figure 3).
4°) Installation de commande selon la revendication 1 ou 2, caractérisée en ce que les organes d'obturation de soupape (38, 68) de la soupape d'aspiration (25) et de la soupape de pression (28) sont de même construction avec chaque fois un élément de guidage (46, 76) comportant chaque fois un organe de base (40, 70) avec deux surfaces d'obturation (42, 44 ; 72, 74) opposées, cet organe de guidage étant guidé suivant l'axe longitudinal de la soupape (25, 28), en traversant les ressorts de soupape (50, 80) ou les ressorts complémentaires de soupape (52, 82) avec du jeu, dans le corps de pompe (12).
5°) Installation de commande selon la revendication 4, caractérisée en ce que le corps de base (40, 70) de l'organe d'obturation de soupape (38, 68) présente de préférence deux surfaces d'obturation (42, 44 ; 72, 74) planes et associées à chacun des sièges de soupape (43, 45 ; 73, 75) avec une surface de siège annulaire symétrique par rapport à l'axe longitudinal, correspondant à la surface d'obturation correspondante (42, 44 ; 72, 74) et permettant une adaptation de forme.
EP90104259A 1989-04-13 1990-03-06 Dispositif de contrôle pour arrêter un moteur à combustion interne diesel Expired - Lifetime EP0392187B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3912145A DE3912145A1 (de) 1989-04-13 1989-04-13 Steuereinrichtung zum stillsetzen einer dieselbrennkraftmaschine
DE3912145 1989-04-13

Publications (2)

Publication Number Publication Date
EP0392187A1 EP0392187A1 (fr) 1990-10-17
EP0392187B1 true EP0392187B1 (fr) 1992-10-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104259A Expired - Lifetime EP0392187B1 (fr) 1989-04-13 1990-03-06 Dispositif de contrôle pour arrêter un moteur à combustion interne diesel

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EP (1) EP0392187B1 (fr)
JP (1) JPH02298659A (fr)
DE (2) DE3912145A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136626C1 (fr) * 1991-11-07 1992-10-08 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
EP1094216A3 (fr) * 1999-10-21 2002-05-02 Miguel Roy Jimenez Dispositif pour diminuer la consommation en carburant des moteurs à combustion
DE102007052665A1 (de) 2007-11-05 2009-05-07 Robert Bosch Gmbh Kraftstoffüberströmventil für eine Kraftstoffeinspritzeinrichtung und Kraftstoffeinspritzeinrichtung mit Kraftstoffüberströmventil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5688954A (en) * 1979-12-21 1981-07-18 Nippon Denso Co Ltd Engine stopping apparatus
DE3014712A1 (de) * 1980-04-17 1981-10-22 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung zum stillsetzen einer dieselbrennkraftmaschine

Also Published As

Publication number Publication date
DE59000387D1 (de) 1992-12-03
DE3912145A1 (de) 1990-10-18
EP0392187A1 (fr) 1990-10-17
JPH02298659A (ja) 1990-12-11

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