EP0499789A1 - Control device for stopping an internal combustion engine - Google Patents

Control device for stopping an internal combustion engine Download PDF

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Publication number
EP0499789A1
EP0499789A1 EP19920100630 EP92100630A EP0499789A1 EP 0499789 A1 EP0499789 A1 EP 0499789A1 EP 19920100630 EP19920100630 EP 19920100630 EP 92100630 A EP92100630 A EP 92100630A EP 0499789 A1 EP0499789 A1 EP 0499789A1
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EP
European Patent Office
Prior art keywords
valve
line
seat
fuel
suction
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Withdrawn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
EP19920100630
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German (de)
French (fr)
Inventor
Karl Rapp
Hansjoerg Dipl.-Ing. Frey (Fh)
Karsten Dipl.-Ing. Hummel
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
Priority claimed from DE19914104807 external-priority patent/DE4104807A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0499789A1 publication Critical patent/EP0499789A1/en
Withdrawn legal-status Critical Current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
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86839—Four port reversing valves

Definitions

  • the invention relates to a control device for stopping an internal combustion engine according to the preamble of claim 1.
  • the main application P 39 34 389 proposes a control device for stopping an internal combustion engine, with a reversing valve used in fuel lines between a feed pump and a fuel injection pump, by means of which the direction of action of the feed pump can be reversed by changing the line connections made in the reversing valve to stop the internal combustion engine.
  • the suction chamber of the fuel injection pump is connected to the suction side of the feed pump and the pressure side of the feed pump is connected to the fuel reservoir.
  • the reversing valve has a valve member with a double-seat valve closing body, which is partially elastomer-coated.
  • the valve member is expensive to manufacture because of the elastomer coating.
  • the control device according to the invention for stopping an internal combustion engine with the characterizing features of claim 1 has the advantage that the valve member is easy to manufacture, since the sealing element can be retrofitted as a separate part thereon.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the figures show a control device with a reversing valve in longitudinal section, the reversing valve being shown in FIG. 1 in the conveying position and in FIG. 2 in the shut-off position.
  • a control device 14 has a reversing valve 12 inserted into the fuel circuit of a fuel injection pump 11 and a feed pump 13.
  • the reversing valve 12 is designed as a solenoid valve with a valve member 16 which can be displaced by the force of a return spring 17 into a conveying position for operating an internal combustion engine and against spring force into a switch-off position for stopping the internal combustion engine.
  • the reversing valve 12 is designed as a 4/2-way valve and has a three-part housing 22, with a central housing part 23 and two lateral housing parts 24 and 25.
  • the housing parts 23, 24, 25 are distributed over several screws 26 on the circumference of the housing connected to one another, a sealing ring 27 being clamped in each case between two housing parts.
  • the valve member 16 of the reversing valve is designed as a slide with a blind bore 28 open to the return spring 17, from which a transverse bore 29, 30 extends in each of the two end regions of the slide.
  • the slide 16 has on its outer surface two radially projecting annular projections 31, 32, over each of which a sealing element 33, 34 is slipped, which serves as a double-seat valve closing body.
  • the sealing elements 33, 34 are elastically deformable in such a way that they can be buttoned over the projections 31, 32 and cannot be released from the projections by axial forces occurring during the operation of the reversing valve.
  • the sealing elements 33, 34 can for example consist of rubber or a rubber-like material.
  • Two valve spaces 35, 36 are formed in the valve housing 22, each of which forms two valve seats 39 and 40 or 41 and 42.
  • the sealing elements 33, 34 are provided with elastically deformable sealing lips 37 facing the valve seats 39, 40 and 41, 42, respectively.
  • the slider 16 can also have a plurality of axially offset radial projections in the region of each sealing element, so that the sealing elements can also withstand higher axial loads.
  • the slide is guided at its two ends in bores 44 in the lateral valve housing parts 24, 25.
  • the lateral valve housing parts 24, 25 and the central valve housing part 23 also have larger bores 46 in diameter, through which the slide 16 passes with great radial play.
  • an electromagnet 48 is inserted, which acts on the end face of the slide 16 via a pin 49.
  • the blind bore 28 is connected via a bore 51 in the end face of the slide to the space 52 delimited by the slide on the one hand and the electromagnet on the other.
  • the return spring 17 which holds the slide in contact with the pin 49, engages on the slide 16 via a plate 54.
  • the return spring 17 is supported on a closure part 55 inserted into the lateral valve housing part 25, the return spring 17 being arranged in a space 56 which is connected by a bore 57 in the plate 54 to the blind bore 28 in the slide 16.
  • the return spring 17 can also act directly, that is, without a spring plate on the slide 16.
  • a valve chamber 58 formed in the region of the transverse bore 29 in the end region of the slide in the lateral valve housing part 25 facing the return spring 17 is connected to a transverse bore 59 which is connected via a connecting line 60 to the suction chamber 61 of the fuel injection pump 11.
  • a fuel temperature sensor can be inserted into the transverse bore 59.
  • a suction line 62 leads from the lateral valve housing part 24 to the feed pump 13, from which a pressure line 63 continues, in which a filter 64 is arranged.
  • the pressure line 63 opens into the other side valve housing part 25.
  • a tank line 66 leads from the central valve housing part 23 to a fuel reservoir 67.
  • valve seat 41 In the delivery position of the slide, as shown in FIG. 1, the valve seat 41 is open and the second sealing element 34 is in contact with the valve seat 42, so that the feed pump 13 passes fuel via the tank line 66 through the bore 46 surrounding the slide and the opened valve seat 41 can suck from the fuel tank 67.
  • the first sealing element 33 closes the valve seat 40 in the conveyed position of the slide 16, so that the other valve seat 39 is open. Fuel from the feed pump 13 can thus pass through the opened valve seat 39 and the one surrounding the slide 16 Bore 46 in the lateral valve housing part 25 into the transverse bore 59 and from there via the connecting line 60 into the suction chamber 61 of the fuel injection pump 11.
  • An overflow line 68 leads from the suction chamber 61, in which an overflow valve 69 is arranged and which opens into the fuel reservoir 67. In the conveying position, the slide 16 is held by the force of the return spring 17 in contact with the pin 49 of the electromagnet 48 not energized.
  • the pressure line 63 of the feed pump 13 is connected to the tank line 66 through the valve seat 39 held open by the first sealing element 33 and the bore 46 surrounding the slide 16 in the central valve housing part 23. In the switch-off position, the feed pump 13 thus sucks the suction chamber 61 of the fuel injection pump empty and conveys the fuel from the suction chamber into the fuel reservoir 67.
  • the sealing lips 37 When the slide 16 is adjusted between the conveying position and the switch-off position, the sealing lips 37 first come into contact with the respective valve seat and yield elastically and thus reliably seal the valve seats. Due to the elastic deformation of the sealing lips 37, manufacturing inaccuracies can be compensated for, for example, deviations in the spacing of the valve seats, so that both valve seats required for the respective position are nevertheless sealed.

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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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The control device (14) has a reversing valve (12) which is arranged in fuel lines, into which a feed pump (13) is fitted, between a fuel tank (67) and the suction space (61) of a fuel injection pump (11) and by means of which, to stop an internal combustion engine operated by means of the fuel injection pump, the interconnections between the lines can be altered in such a way that the suction space (61) is connected to the suction side of the feed pump (13) and the delivery side of the feed pump is connected to the fuel tank (67). The valve member of the reversing valve (12) is a slide (16) which carries two double seat valve closing bodies (33, 34) which interact with corresponding valve seats (39, 40; 41, 42). The double seat valve closing bodies (33, 34) form sealing elements which are attached releasably to the slide (16) and are composed of an elastically deformable material. The sealing elements (33, 34) are provided with sealing lips (37) which point towards the valve seats and are elastically deformable, with the result that, even in the case of dimensional deviations due to manufacturing tolerances, both valve seats (39, 41 and 40, 42 respectively) are in each case reliably sealed off. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Steuereinrichtung zum Stillsetzen einer Brennkraftmaschine nach der Gattung des Anspruchs 1.The invention relates to a control device for stopping an internal combustion engine according to the preamble of claim 1.

In der Hauptanmeldung P 39 34 389 wird eine Steuereinrichtung zum Stillsetzen einer Brennkraftmaschine vorgeschlagen, mit einem in Kraftstoffleitungen zwischen einer Förderpumpe und einer Kraftstoffeinspritzpumpe eingesetzten Umsteuerventil, durch das zum Stillsetzen der Brennkraftmaschine die Wirkungsrichtung der Förderpumpe durch Änderung der im Umsteuerventil erfolgenden Leitungsverbindungen umkehrbar ist. Dabei wird zum Stillsetzen der Brennkraftmaschine der Saugraum der Kraftstoffeinspritzpumpe mit der Saugseite der Förderpumpe und die Druckseite der Förderpumpe mit dem Kraftstoffvorratsbehälter verbunden. Das Umsteuerventil weist dabei ein Ventilglied mit einem Doppelsitzventilschließkörper auf, der partiell elastomerbeschichtet ist. Das Ventilglied ist jedoch wegen der Elastomerbeschichtung aufwendig herzustellen.The main application P 39 34 389 proposes a control device for stopping an internal combustion engine, with a reversing valve used in fuel lines between a feed pump and a fuel injection pump, by means of which the direction of action of the feed pump can be reversed by changing the line connections made in the reversing valve to stop the internal combustion engine. To stop the internal combustion engine, the suction chamber of the fuel injection pump is connected to the suction side of the feed pump and the pressure side of the feed pump is connected to the fuel reservoir. The reversing valve has a valve member with a double-seat valve closing body, which is partially elastomer-coated. However, the valve member is expensive to manufacture because of the elastomer coating.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Steuereinrichtung zum Stillsetzen einer Brennkraftmaschine mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß das Ventilglied einfach herstellbar ist, da das Dichtelement als getrenntes Teil auf diesem nachträglich montierbar ist.The control device according to the invention for stopping an internal combustion engine with the characterizing features of claim 1 has the advantage that the valve member is easy to manufacture, since the sealing element can be retrofitted as a separate part thereon.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung gekennzeichnet. Durch die Weiterbildung nach Anspruch 2 ist das Umsteuerventil wenig toleranzempfindlich, das heißt, daß eine sichere Abdichtung der Ventilsitze auch bei fertigungsbedingten Maßabweichungen sichergestellt ist.Advantageous refinements and developments of the invention are characterized in the subclaims. Due to the development according to claim 2, the reversing valve is not very sensitive to tolerances, which means that a secure sealing of the valve seats is ensured even in the case of manufacturing-related dimensional deviations.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die Figuren zeigen eine Steuereinrichtung mit einem Umsteuerventil im Längsschnitt, wobei das Umsteuerventil in Figur 1 in der Förderstellung und in Figur 2 in der Abschaltstellung dargestellt ist.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The figures show a control device with a reversing valve in longitudinal section, the reversing valve being shown in FIG. 1 in the conveying position and in FIG. 2 in the shut-off position.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Eine Steuereinrichtung 14 weist ein in den Kraftstoffkreislauf einer Kraftstoffeinspritzpumpe 11 eingefügtes Umsteuerventil 12 und eine Förderpumpe 13 auf. Das Umsteuerventil 12 ist als Magnetventil ausgebildet mit einem Ventilglied 16, das durch die Kraft einer Rückstellfeder 17 in eine Förderstellung zum Betrieb einer Brennkraftmaschine und entgegen Federkraft in eine Abschaltstellung zum Stillsetzen der Brennkraftmaschine verschiebbar ist.A control device 14 has a reversing valve 12 inserted into the fuel circuit of a fuel injection pump 11 and a feed pump 13. The reversing valve 12 is designed as a solenoid valve with a valve member 16 which can be displaced by the force of a return spring 17 into a conveying position for operating an internal combustion engine and against spring force into a switch-off position for stopping the internal combustion engine.

Das Umsteuerventil 12 ist als ein 4/2-Wegeventil ausgeführt und weist ein dreiteiliges Gehäuse 22 auf, mit einem mittleren Gehäuseteil 23 und zwei seitlichen Gehäuseteilen 24 und 25. Die Gehäuseteile 23, 24, 25 sind über mehrere am Umfang des Gehäuses verteilte Schrauben 26 miteinander verbunden, wobei jeweils zwischen zwei Gehäuseteilen ein Dichtring 27 eingespannt ist.The reversing valve 12 is designed as a 4/2-way valve and has a three-part housing 22, with a central housing part 23 and two lateral housing parts 24 and 25. The housing parts 23, 24, 25 are distributed over several screws 26 on the circumference of the housing connected to one another, a sealing ring 27 being clamped in each case between two housing parts.

Das Ventilglied 16 des Umsteuerventils ist als ein Schieber ausgebildet mit einer zur Rückstellfeder 17 offenen Sackbohrung 28, von der in den beiden Endbereichen des Schiebers jeweils eine Querbohrung 29, 30 ausgeht. Der Schieber 16 weist an seiner Außenfläche zwei radial vorstehende ringartig umlaufende Vorsprünge 31, 32 auf, über die jeweils ein Dichtelement 33, 34 gestülpt ist, das als Doppelsitzventilschließkörper dient. Die Dichtelemente 33, 34 sind elastisch so verformbar, daß sie über die Vorsprünge 31, 32 geknöpft werden können und durch im Betrieb des Umsteuerventils auftretende axiale Kräfte nicht von den Vorsprüngen gelöst werden können. Die Dichtelemente 33, 34 können beispielsweise aus Gummi oder einem gummiähnlichen Material bestehen. Im Ventilgehäuse 22 sind zwei Ventilräume 35, 36 ausgeformt, die jeweils zwei Ventilsitze 39 und 40 bzw. 41 und 42 bilden. Die Dichtelemente 33, 34 sind mit zu den Ventilsitzen 39, 40 bzw. 41, 42 weisenden, elastisch verformbaren Dichtlippen 37 versehen. Der Schieber 16 kann auch im Bereich jedes Dichtelements mehrere axial versetzte radiale Vorsprünge aufweisen, damit die Dichtelemente auch höheren axialen Belastungen Stand halten können.The valve member 16 of the reversing valve is designed as a slide with a blind bore 28 open to the return spring 17, from which a transverse bore 29, 30 extends in each of the two end regions of the slide. The slide 16 has on its outer surface two radially projecting annular projections 31, 32, over each of which a sealing element 33, 34 is slipped, which serves as a double-seat valve closing body. The sealing elements 33, 34 are elastically deformable in such a way that they can be buttoned over the projections 31, 32 and cannot be released from the projections by axial forces occurring during the operation of the reversing valve. The sealing elements 33, 34 can for example consist of rubber or a rubber-like material. Two valve spaces 35, 36 are formed in the valve housing 22, each of which forms two valve seats 39 and 40 or 41 and 42. The sealing elements 33, 34 are provided with elastically deformable sealing lips 37 facing the valve seats 39, 40 and 41, 42, respectively. The slider 16 can also have a plurality of axially offset radial projections in the region of each sealing element, so that the sealing elements can also withstand higher axial loads.

Der Schieber ist an seinen beiden Enden in Bohrungen 44 in den seitlichen Ventilgehäuseteilen 24, 25 geführt. Die seitlichen Ventilgehäuseteile 24, 25 sowie das mittlere Ventilgehäuseteil 23 weisen außerdem im Durchmesser größere Bohrungen 46 auf, durch die der Schieber 16 mit großem radialem Spiel hindurchtritt. In das seitliche Ventilgehäuseteil 24 ist ein Elektromagnet 48 eingesetzt, der über einen Stift 49 auf die Stirnseite des Schiebers 16 wirkt.The slide is guided at its two ends in bores 44 in the lateral valve housing parts 24, 25. The lateral valve housing parts 24, 25 and the central valve housing part 23 also have larger bores 46 in diameter, through which the slide 16 passes with great radial play. In the lateral valve housing part 24, an electromagnet 48 is inserted, which acts on the end face of the slide 16 via a pin 49.

Die Sackbohrung 28 ist über eine Bohrung 51 in der Stirnseite des Schiebers mit dem durch den Schieber einerseits und den Elektromagneten andererseits begrenzten Raum 52 verbunden. Am anderen Ende greift am Schieber 16 über einen Teller 54 die Rückstellfeder 17 an, die den Schieber in der Anlage am Stift 49 hält. Die Rückstellfeder 17 stützt sich an einem in das seitliche Ventilgehäuseteil 25 eingesetzten Verschlußteil 55 ab, wobei die Rückstellfeder 17 in einem Raum 56 angeordnet ist, der durch eine Bohrung 57 im Teller 54 mit der Sackbohrung 28 im Schieber 16 verbunden ist. Die Rückstellfeder 17 kann auch direkt, das heißt, ohne Federteller am Schieber 16 angreifen. Ein im Bereich der Querbohrung 29 im der Rückstellfeder 17 zugewandten Endbereich des Schiebers im seitlichen Ventilgehäuseteil 25 gebildeter Ventilraum 58 ist mit einer Querbohrung 59 verbunden, die über eine Verbindungsleitung 60 mit dem Saugraum 61 der Kraftstoffeinspritzpumpe 11 verbunden ist. In die Querbohrung 59 kann ein Kraftstofftemperaturfühler eingesetzt sein. Vom seitlichen Ventilgehäuseteil 24 führt eine Saugleitung 62 zur Förderpumpe 13 ab, von der eine Druckleitung 63 weiterführt, in der ein Filter 64 angeordnet ist. Die Druckleitung 63 mündet in das andere seitliche Ventilgehäuseteil 25. Vom mittleren Ventilgehäuseteil 23 führt eine Tankleitung 66 zu einem Kraftstoffvorratsbehälter 67 ab.The blind bore 28 is connected via a bore 51 in the end face of the slide to the space 52 delimited by the slide on the one hand and the electromagnet on the other. At the other end, the return spring 17, which holds the slide in contact with the pin 49, engages on the slide 16 via a plate 54. The return spring 17 is supported on a closure part 55 inserted into the lateral valve housing part 25, the return spring 17 being arranged in a space 56 which is connected by a bore 57 in the plate 54 to the blind bore 28 in the slide 16. The return spring 17 can also act directly, that is, without a spring plate on the slide 16. A valve chamber 58 formed in the region of the transverse bore 29 in the end region of the slide in the lateral valve housing part 25 facing the return spring 17 is connected to a transverse bore 59 which is connected via a connecting line 60 to the suction chamber 61 of the fuel injection pump 11. A fuel temperature sensor can be inserted into the transverse bore 59. A suction line 62 leads from the lateral valve housing part 24 to the feed pump 13, from which a pressure line 63 continues, in which a filter 64 is arranged. The pressure line 63 opens into the other side valve housing part 25. A tank line 66 leads from the central valve housing part 23 to a fuel reservoir 67.

In der Förderstellung des Schiebers, wie in Figur 1 dargestellt, ist der Ventilsitz 41 geöffnet und das zweite Dichtelement 34 liegt am Ventilsitz 42 an, so daß die Förderpumpe 13 über die Tankleitung 66 durch die den Schieber umgebende Bohrung 46 sowie den geöffneten Ventilsitz 41 Kraftstoff aus dem Kraftstoffvorratsbehälter 67 ansaugen kann. Das erste Dichelement 33 verschließt in der Förderstellung des Schiebers 16 den Ventilsitz 40, so daß der andere Ventilsitz 39 geöffnet ist. So kann Kraftstoff von der Förderpumpe 13 durch den geöffneten Ventilsitz 39 und die den Schieber 16 umgebende Bohrung 46 im seitlichen Ventilgehäuseteil 25 in die Querbohrung 59 und von dieser über die Verbindungsleitung 60 in den Saugraum 61 der Kraftstoffeinspritzpumpe 11 gefördert werden. Vom Saugraum 61 führt eine Überströmleitung 68 ab, in der ein Überströmventil 69 angeordnet ist und die in den Kraftstoffvorratsbehälter 67 mündet. In der Förderstellung wird der Schieber 16 durch die Kraft der Rückstellfeder 17 in der Anlage am Stift 49 des nicht bestromten Elektromagneten 48 gehalten.In the delivery position of the slide, as shown in FIG. 1, the valve seat 41 is open and the second sealing element 34 is in contact with the valve seat 42, so that the feed pump 13 passes fuel via the tank line 66 through the bore 46 surrounding the slide and the opened valve seat 41 can suck from the fuel tank 67. The first sealing element 33 closes the valve seat 40 in the conveyed position of the slide 16, so that the other valve seat 39 is open. Fuel from the feed pump 13 can thus pass through the opened valve seat 39 and the one surrounding the slide 16 Bore 46 in the lateral valve housing part 25 into the transverse bore 59 and from there via the connecting line 60 into the suction chamber 61 of the fuel injection pump 11. An overflow line 68 leads from the suction chamber 61, in which an overflow valve 69 is arranged and which opens into the fuel reservoir 67. In the conveying position, the slide 16 is held by the force of the return spring 17 in contact with the pin 49 of the electromagnet 48 not energized.

In die Abschaltstellung, in Figur 2 dargestellt, wird der Schieber 16 durch den bei bestromtem Elektromagneten 48 zur Rückstellfeder 17 hin bewegten Stift 49 unter Komprimierung der Rückstellfeder 17 geschoben. In der Abschaltstellung verschließt das erste Dichtelement 33 den Ventilsitz 39 und das zweite Dichtelement 34 den Ventilsitz 41. Die Saugleitung 62 zur Förderpumpe 13 ist in dieser Stellung durch den vom zweiten Dichtelement 34 offengehaltenen Ventilsitz 42, die Querbohrung 30 und Sackbohrung 28 im Schieber 16 mit der Querbohrung 59 im seitlichen Ventilgehäuseteil 25 und somit mit dem Saugraum 61 der Kraftstoffeinspritzpumpe 11 verbunden. Die Druckleitung 63 der Förderpumpe 13 ist dabei durch den vom ersten Dichtelement 33 offengehaltenen Ventilsitz 39 und die den Schieber 16 umgebende Bohrung 46 im mittleren Ventilgehäuseteil 23 mit der Tankleitung 66 verbunden. Somit saugt die Förderpumpe 13 in der Abschaltstellung den Saugraum 61 der Kraftstoffeinspritzpumpe leer und fördert den Kraftstoff aus dem Saugraum in den Kraftstoffvorratsbehälter 67.In the switch-off position, shown in Figure 2, the slide 16 is pushed by the pin 49 moved toward the return spring 17 when the electromagnet 48 is energized, with compression of the return spring 17. In the switch-off position, the first sealing element 33 closes the valve seat 39 and the second sealing element 34 closes the valve seat 41. The suction line 62 to the feed pump 13 is in this position by the valve seat 42 held open by the second sealing element 34, the transverse bore 30 and blind bore 28 in the slide 16 the transverse bore 59 in the lateral valve housing part 25 and thus connected to the suction chamber 61 of the fuel injection pump 11. The pressure line 63 of the feed pump 13 is connected to the tank line 66 through the valve seat 39 held open by the first sealing element 33 and the bore 46 surrounding the slide 16 in the central valve housing part 23. In the switch-off position, the feed pump 13 thus sucks the suction chamber 61 of the fuel injection pump empty and conveys the fuel from the suction chamber into the fuel reservoir 67.

Bei der Verstellung des Schiebers 16 zwischen der Förderstellung und der Abschaltstellung kommen zunächst die Dichlippen 37 an dem jeweiligen Ventilsitz zur Anlage und geben elastisch nach und dichten somit die Ventilsitze zuverlässig ab. Durch die elastische Verformung der Dichtlippen 37 können Fertigungsungenauigkeiten ausgeglichen werden, beispielsweise Abweichungen im Abstand der Ventilsitze, so daß dennoch beide für die jeweilige Stellung erforderlichen Ventilsitze abgedichtet sind.When the slide 16 is adjusted between the conveying position and the switch-off position, the sealing lips 37 first come into contact with the respective valve seat and yield elastically and thus reliably seal the valve seats. Due to the elastic deformation of the sealing lips 37, manufacturing inaccuracies can be compensated for, for example, deviations in the spacing of the valve seats, so that both valve seats required for the respective position are nevertheless sealed.

Claims (3)

Steuereinrichtung zum Stillsetzen einer Brennkraftmaschine, insbesondere einer Dieselbrennkraftmaschine, mit einer Kraftstoff über eine Tankleitung (66) und eine Saugleitung (62) aus einem Kraftstoffvorratsbehälter (67) ansaugenden und über eine Druckleitung (63) und eine Verbindungsleitung (60) zum Eingang eines Saugraums (61) einer Kraftstoffeinspritzpumpe (11) fördernden Förderpumpe (13), mit einem in seiner Förderstellung die Tankleitung (66) mit der Saugleitung (62) sowie die Druckleitung (63) mit der Verbindungsleitung (60) verbindenden, als ein Zweistellungs-Mehrwegeventil ausgebildeten Umsteuerventil (12), das ein in einem Ventilgehäuse (22) axial beweglich geführtes Ventilglied (16) aufweist und von der Förderstellung zum Betrieb der Brennkraftmaschine in eine Abschaltstellung zum Stillsetzen der Brennkraftmaschine umschaltbar ist, in der der Saugraum (61) der Kraftstoffeinspritzpumpe (11) mit der Saugleitung (62) der Förderpumpe (13) und deren Druckleitung (63) mit der Tankleitung (66) verbunden ist und mit einem, den Druck im Saugraum (61) begrenzenden, in eine den Kraftstoff vom Saugraum (61) zum Kraftstoffvorratsbehälter (67) rückführende Überströmleitung (68) eingesetzten Überströmventil (69), wobei das Ventilglied (16) des Umsteuerventils (12) zumindest zur Steuerung der Verbindung von der Tankleitung (66) zur Saugleitung (62) der Förderpumpe (13) mit einem Doppelsitzventilschließkörper (34) versehen ist und mit zwei einander gegenüberliegenden, im Ventilgehäuse (22) befindlichen Ventilsitzen (41, 42) zusammenarbeitet, von denen der erste Ventilsitz (41) in der Förderstellung des Umsteuerventils durch den Doppelsitzventilschließkörper (33) offengehalten wird und der zweite Ventilsitz (42) verschlossen wird und von denen der erste Ventilsitz (41) in der Abschaltstellung verschlossen wird und der zweite Ventilsitz (42) offengehalten wird, nach Patentanmeldung P 39 34 38, dadurch gekennzeichnet, daß der Doppelsitzventilschließkörper durch ein auf das Ventilglied (16) lösbar aufgeknöpftes Dichtelement (34) aus einem elastischen Werkstoff gebildet ist, das zu den Ventilsitzen (41, 42) weisende federnd nachgiebige Dichtlippen (37) aufweist.Control device for stopping an internal combustion engine, in particular a diesel internal combustion engine, with a fuel that sucks fuel from a fuel tank (67) via a tank line (66) and a suction line (62) and via a pressure line (63) and a connecting line (60) to the entrance of a suction chamber ( 61) a fuel injection pump (11) conveying feed pump (13), with a in its delivery position connecting the tank line (66) with the suction line (62) and the pressure line (63) with the connecting line (60), designed as a two-position multi-way valve, designed as a reversing valve (12), which has a valve member (16) axially movably guided in a valve housing (22) and can be switched from the delivery position for operating the internal combustion engine into a switch-off position for stopping the internal combustion engine, in which the suction chamber (61) of the fuel injection pump (11) with the suction line (62) of the feed pump (13) and its pressure line (63) is connected to the tank line (66) and to an overflow valve (69), which limits the pressure in the suction chamber (61) and is inserted into an overflow valve (68) returning the fuel from the suction chamber (61) to the fuel reservoir (67), the valve member (16 ) of the reversing valve (12) at least for controlling the connection of the tank line (66) to the suction line (62) of the feed pump (13) is provided with a double seat valve closing body (34) and cooperates with two opposite valve seats (41, 42) located in the valve housing (22), of which the first valve seat (41 ) is kept open in the conveyed position of the reversing valve by the double seat valve closing body (33) and the second valve seat (42) is closed and by which the first valve seat (41) is closed in the switch-off position and the second valve seat (42) is kept open, according to patent application P 39 34 38, characterized in that the double seat valve closing body is formed by a sealing element (34) detachably buttoned onto the valve member (16) from an elastic material which has resiliently flexible sealing lips (37) pointing towards the valve seats (41, 42). Steuereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Ventilglied (16) des Umsteuerventils (12) außer dem einen, der Saugleitung (62) zugeordneten Doppelsitzventilschließkörper (34) noch einen weiteren Doppelsitzventilschließkörper (33) aufweist, der ebenfalls mit zwei einander gegenüberliegenden, im Ventilgehäuse (22) befindlichen Ventilsitzen (39, 40) zusammenarbeitet, von denen der eine Ventilsitz (39) des weiteren Sitzventilschließkörpers (33) in der Förderstellung des Umsteuerventils (12) die Verbindung von der Druckleitung (63) zur Verbindungsleitung (60) offenhält und diese in der Abschaltestellung verschließt, und von denen der andere Ventilsitz (40) in der Abschaltstellung des Umsteuerventils (12) die Verbindung von der Druckleitung (63) zur Tankleitung (66) offenhält und diese in der Förderstellung verschließt, wobei der weitere Doppelsitzventilschließkörper ebenfalls durch ein auf das Ventilglied (16) lösbar aufgeknöpftes Dichtelement (33) aus einem elastischen Werkstoff gebildet ist, das zu den Ventilsitzen (39, 40) weisende federnd nachgiebige Dichtlippen (37) aufweist.Control device according to claim 1, characterized in that the valve member (16) of the reversing valve (12) has, in addition to the one double-seat valve closing body (34) assigned to the suction line (62), a further double-seat valve closing body (33), which also has two opposing, in Valve housing (22) located valve seats (39, 40) cooperates, of which one valve seat (39) of the further seat valve closing body (33) in the conveyed position of the reversing valve (12) keeps the connection from the pressure line (63) to the connecting line (60) open this closes in the switch-off position, and of which the other valve seat (40) in the switch-off position of the reversing valve (12) keeps the connection from the pressure line (63) to the tank line (66) open and closes it in the delivery position, the further double-seat valve closing body also being closed a sealing element (33), detachably buttoned onto the valve member (16) s an elastic material is formed which has resiliently flexible sealing lips (37) pointing towards the valve seats (39, 40). Steuereinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Ventilglied (16) einen Kanal (28) aufweist, durch den in der Abschaltstellung des Umsteuerventils (12) die Verbindungsleitung (60) mit der Saugleitung (62) verbindbar ist.Control device according to claim 1 or 2, characterized in that the valve member (16) has a channel (28) through which the connecting line (60) can be connected to the suction line (62) in the switch-off position of the reversing valve (12).
EP19920100630 1991-02-16 1992-01-16 Control device for stopping an internal combustion engine Withdrawn EP0499789A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914104807 DE4104807A1 (en) 1989-10-14 1991-02-16 Controller with changeover valve for IC engine deactivation - has valve seatings provided with deformable lips and sealed reliably with separable and elastically deformable elements NoAbstract
DE4104807 1991-02-16

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EP0499789A1 true EP0499789A1 (en) 1992-08-26

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EP (1) EP0499789A1 (en)
JP (1) JPH0587007A (en)

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DE4129828C1 (en) * 1991-09-07 1993-04-29 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4133557C2 (en) * 1991-10-10 2000-06-29 Bosch Gmbh Robert Control device for stopping an internal combustion engine
DE4209782A1 (en) * 1992-03-26 1993-09-30 Bosch Gmbh Robert Control device for stopping an internal combustion engine
JP3133586B2 (en) * 1993-11-18 2001-02-13 富士重工業株式会社 Fuel pressure control system for high pressure fuel injection engine
DE69727225T2 (en) * 1996-06-24 2004-10-21 Breed Automotive Tech FUEL FLOW CONTROL UNIT
JP3774334B2 (en) * 1999-06-17 2006-05-10 株式会社テージーケー Four-way selector valve
KR101022925B1 (en) * 2005-03-28 2011-03-16 시그마-알드리치컴퍼니 Valve for withdrawal of a substance from a container
DE102021112551A1 (en) * 2021-05-14 2022-11-17 Stiebel Eltron Gmbh & Co. Kg 3/2-way valve, hydraulic assembly and associated heat pump
DE102022200494A1 (en) 2022-01-18 2023-07-20 Robert Bosch Gesellschaft mit beschränkter Haftung Valve device, in particular for controlling a gas flow, fuel cell arrangement and fuel cell-operated vehicle

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DE941236C (en) * 1952-07-11 1956-04-05 Paxman & Co Ltd Davey Safety device for shutting down injection internal combustion engines
GB819278A (en) * 1956-02-20 1959-09-02 Carrier Engineering Co Ltd Improvements in or relating to reversing valves for refrigeration systems
US3525364A (en) * 1968-09-04 1970-08-25 Mccord Corp Control valve assembly
FR2303217A1 (en) * 1975-03-06 1976-10-01 Festo Maschf Stoll G Compressed air valve mechanism - has double-sided U-section sealing ring on coupler link
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US5152265A (en) 1992-10-06
JPH0587007A (en) 1993-04-06

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