EP0098827B1 - Device to switch off an injection internal-combustion engine - Google Patents

Device to switch off an injection internal-combustion engine Download PDF

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Publication number
EP0098827B1
EP0098827B1 EP83890113A EP83890113A EP0098827B1 EP 0098827 B1 EP0098827 B1 EP 0098827B1 EP 83890113 A EP83890113 A EP 83890113A EP 83890113 A EP83890113 A EP 83890113A EP 0098827 B1 EP0098827 B1 EP 0098827B1
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EP
European Patent Office
Prior art keywords
stop
spring
boltable
control rod
counter
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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
Application number
EP83890113A
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German (de)
French (fr)
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EP0098827A1 (en
Inventor
Georg Brasseur
Heinz Rathmayr
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Friedmann and Maier AG
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Friedmann and Maier AG
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Publication of EP0098827A1 publication Critical patent/EP0098827A1/en
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Publication of EP0098827B1 publication Critical patent/EP0098827B1/en
Expired legal-status Critical Current

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    • 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
    • F02M59/447—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 means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of 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
    • F02M63/022—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 acting on fuel control mechanism

Definitions

  • the invention relates to a device for switching off an injection internal combustion engine, in which a delivery rate control rod of an injection pump interacts with an adjustable stop, which can be locked in the position in a position that releases the entire adjustment range of the delivery rate control rod, by a locking member, which in its locked position by means of a shutdown spring the movement of the delivery control rod is subjected to zero delivery, the locking member being releasable depending on an operating state.
  • an adjustable stop which can be locked in the position in a position that releases the entire adjustment range of the delivery rate control rod, by a locking member, which in its locked position by means of a shutdown spring the movement of the delivery control rod is subjected to zero delivery, the locking member being releasable depending on an operating state.
  • injection internal combustion engines must be guaranteed with certainty when the internal combustion engine assumes an excessively high speed.
  • the injection internal combustion engine must also be switched off automatically in the event of faults in the power supply which endanger the proper functioning of the control electronics.
  • Simple centrifugal switches are already known as shutdown devices at overspeed, which interrupt the power supply when they respond or close a circuit for the actuation of an electric valve. In the known cases, however, only the fuel supply was prevented in this way, which resulted in a certain delay, which can already lead to damage to the internal combustion engine.
  • the invention now aims to provide a simple and reliable device of the type mentioned at the outset, in which the spring force of the stop required for the shutdown can take place directly when the internal combustion engine is put into operation by pulling up the shut-off spring with the aid of a servomotor or a stepping motor, which is usually used for the adjustment of the flow control rod during operation.
  • a servomotor or a stepping motor which is usually used for the adjustment of the flow control rod during operation.
  • the invention essentially starts from the above-mentioned device in that the actuating element actuated by a servomotor, in particular a stepping motor, acts on the conveying quantity control rod with the interposition of a trailing spring, that the lockable stop is connected to a further stop, which cooperates with a counter-stop of the adjusting member when the adjusting member is moved in the direction of the maximum delivery rate of the delivery quantity control rod, the stop spring being tensioned until the locking member engages in the lockable stop, and that the further stop is in operation out of engagement with the counter-blow of the adjusting member.
  • a servomotor in particular a stepping motor
  • the actuator for the delivery rate adjustment which is actuated by an actuator, in particular a stepping motor, acts on the delivery rate control rod with the interposition of a trailing spring, ensures that the switch to the zero delivery position takes place regardless of the position of the adjustment member even when in the power transmission malfunctions have occurred from the actuator to the actuator. Furthermore, these measures bring the adjusting element into a position corresponding to the maximum delivery quantity of the delivery quantity control rod or slightly exceeding this position immediately before the starting process and takes the lockable stop against the force of the stop spring with this adjustment path.
  • the stop spring is tensioned until the locking member engages in the stop and remains tensioned even if the adjusting member is subsequently pulled back into the corresponding operating position by the servomotor in the direction of zero conveyance.
  • the lockable stop comes into a position in which the further stop can no longer collide with the counter-stop of the adjustment member, so that the lockable stop only comes into effect again when the locking member is released and the delivery rate control rod with the Force of the stop spring is moved towards zero conveyance.
  • the lockable stop can be locked in a simple manner by an armature of an electromagnet, which in the de-energized state releases the stop path of the stop.
  • Such an armature of an electromagnet can be locked in a recess of the lockable stop and, when the electromagnet is de-energized, by a return spring from the ver locking position can be pulled out.
  • the design can advantageously be made such that the locking member is formed by a displaceable pin which engages in an angled link guide of the stop.
  • the pin can be provided with a roller for further locking of the required triggering forces, which roller can be locked in part of the setting.
  • the displaceable pin engaging in the baffle can advantageously be displaced against the force of a return spring, in particular by a centrifugal force measuring mechanism, which not only takes into account faults in the power supply, but also the inadmissible occurrence of overspeed by switching off the internal combustion engine can be worn.
  • the design can be made so that the lockable stop and the further stop are arranged on a pivotably mounted lever on which a spring engages, and that the stop is arranged at a smaller distance from the pivot axis of the lever than the further stop.
  • the further stop can be brought out of engagement with the counter-stop of the adjusting member in a particularly simple manner after the opening of the stop spring, as is necessary for the trouble-free operation of the control device.
  • the design is such that the further stop is formed by a hook-shaped part of the lockable stop, which overlaps projections, in particular driver bolts, of the adjusting member in a first swivel position of the lockable stop and in a second swivel position, which corresponds to the operating position corresponds to, is out of engagement with the projections, wherein preferably the lockable stop is pressed resiliently into the pivot position corresponding to the operating position.
  • FIG. 1 shows a schematic illustration of the end of the control rod, the adjusting member, and the lockable stop when the internal combustion engine is switched off
  • FIG. 2 shows an analogous illustration of the lockable stop in the operating position
  • FIG. 3 shows a section through a controller for a fuel injection pump
  • 4 shows a section along line IV-IV of FIG. 3
  • FIG. 5 shows a section along line VV of FIG. 3
  • FIG. 6 shows a section along line VI-VI of FIG. 3
  • FIG. 7 shows a section Section along the line VII-VII of Fig. 4
  • Fig. 8 is a schematic representation analogous to the representation in Fig. 7 with an additional centrifugal force measuring device.
  • the flow control rod of the injection pump is designated 1.
  • a shift of the control rod 1 in the direction of the double arrow 2 upwards causes a reduction in the delivery rate and a shift in the direction of the double arrow 2 downwards increases the delivery rate of the injection pump.
  • a counterstrike formed by a plate 3 is rigidly connected to the control rod 1 and can be fixed in its chosen position by nuts 4.
  • the control rod 1 is adjusted by an adjusting element designed as a toothed rack 5, which meshes with the pinion of a stepping motor, not shown. Between the rack 5, which is hollow, and the control rod 1, a drag spring 6 is arranged, which saves the required adjustment stroke, which is specified by the stepper motor, whenever the adjustment of the control rod 1 is not possible.
  • a counter stop 7 is rigidly connected to the rack 5.
  • the two counter stops 3 and 7 now interact with the lockable stop 8, which is connected to a stop spring.
  • the direction of action of the stop spring is indicated by the arrow 9.
  • the lockable stop 8 is designed as a hook, the hook-shaped end part 10 of which engages over the counter stop 7 of the toothed rack when the internal combustion engine is switched off.
  • the stop 8 also overlaps with a projection 11 the counter-stop 3 of the flow control rod, so that the control rod 1 is pulled into the stop position when the lock is triggered.
  • the lockable stop 8 is pivotally articulated about a pivot axis 12.
  • the locking member is formed by the armature 13 of an electromagnet, which is locked behind a corresponding recess 14 of the stop 8 in operation.
  • the toothed rack 5 is moved downward by the stepping motor in the direction of the double arrow 2, the control rod 1 reaching the full load position plus a predetermined additional stroke.
  • the lockable stop 8 is pulled down against the direction of action 9 of the stop spring and the stop spring is thus preloaded.
  • a tension spring 15 pivots the stop 8 about its pivot axis 12 into the operating position shown in FIG. 2.
  • the armature 13 of the electromagnet is supported on the recess 14 of the lockable stop 8, the hook-shaped end part 10 being pivoted out of the movement path of the counter-stop 7.
  • the pivoting movement of the lockable stop 8 about the pivot axis 12 is limited by a stop roller 16.
  • the projection 11 of the injection pumps in operation and the counter stop 3 can be moved out of this full load position by the rack 5 with the interposition of the drag spring 6 into any suitable operating position.
  • the armature 13 of the lifting magnet is pulled back, the locking of the stop 8 is released and this stop 8 is moved in the direction by the force of the prestressed stop spring the arrow 9 withdrawn, the counter stop 3 and thus the control rod 1 being pulled into the stop position.
  • the stop spring is designated 17 and acts via a two-armed lever 18 on the counter stop 3 of the control rod. At the free end of this two-armed lever 18, the pivot axis 12 of the lockable stop 8 is arranged.
  • the spring 15 is preloaded in the direction of the arrow 19 and pivots the stop 8 after the stop has been locked into the position 8 ', the spring occupying the position 15'.
  • the drag spring is again designated 6.
  • the stepping motor is designated by 20 in FIG. 3 and a centrifugal force measuring mechanism is designated by 21.
  • the injection internal combustion engine is indicated at 22, the camshaft 23 of the injection internal combustion engine 22 driving the centrifugal force measuring device 21 and being supported in the engine 22 by bearings 24.
  • the pinion 25 of the stepping motor 20 meshes with the toothed rack 5, the displacement of the toothed rack 5 being transmitted to the control rod 1 with the trailing spring 6 interposed.
  • the position of the lockable stop 8 shown in FIG. 3 corresponds to the position which makes it possible to open the stop spring 17, the toothed rack 5 being moved to the right in the direction of the full load position of the control rod 1 by the stepping motor 20.
  • FIG. 4 the counter-stop 3 of the flow control rod 1 can be seen, which is engaged by driver pins 26.
  • These drive pins 26 form the pivot axis 12 of the lockable stop 8 and at the same time also form the articulation axis of the two-armed lever 18 which can be pivoted about a shaft 27 fixed to the housing and on which the stop spring 17 acts.
  • a backdrop 28 is rigidly connected to the lockable stop 8, which is clearly shown in FIGS. 7 and 8.
  • a pin pivotably mounted about an axis 29 fixed to the housing engages in this link 28, the pivoting taking place via an angle lever 30 and a lifting magnet 31.
  • Fig. 5 it can be seen that the counter-stop 7 of the rack 5 is formed by driver bolts 32 rigidly connected to the rack, which engage in the hook-shaped end part 10 of the lockable stop 8, as long as the lockable stop 8 has not yet been pivoted into its operating position.
  • the guide is designated, which is connected to the housing.
  • the pinion 25 of the stepping motor 20 is shown in engagement with the rack 5.
  • the lockable stop 8 bears the link 28 into which a pin 34 carried by the angle lever 30 engages.
  • the housing of the controller is designated 35 here.
  • the link 28 has an angled link guide 36, in which pins 34, which can be pivoted by the lifting magnet 31 via the angle lifter 30 about the pivot axis 29, engage.
  • the lockable stop 8 is brought into its end position and the stop spring 17 is fully wound up by means of the driving pins 32.
  • the lockable stop 8 is then pivoted upwards by means of the spring 15, the pin 34 reaching the catch 37 of the link guide 36.
  • the lockable stop 8 remains locked due to the position of its link 28, the holding force being absorbed by the angle lever 30 in its storage on the axis 29.
  • the shutdown force does not therefore have to be compensated for by the magnet.
  • the solenoid 31 is de-energized and the armature of the solenoid is displaced by the spring 38 in the direction of the arrow 39, as a result of which the pin 34 emerges from the catch 37.
  • the stop 8 is now moved to the left, the displacement path being limited by the length of the link guide 36. During this movement, the delivery rate control rod 1 is shifted in the direction of zero delivery.
  • an angle lever 41 which can be pivoted about a pivot axis 40 and which carries a roller 42 at its free end, engages in the link 28.
  • the roller 42 can be locked within the link guide 36 or releases the movement of the lockable stop 8 after pivoting the angle lever 41.
  • the articulation axis 40 is fixed to the housing.
  • a flyweight measuring unit is connected to the camshaft 23 of the internal combustion engine, the flyweights of which are designated by 43.
  • the flyweight measuring mechanism has a measuring mechanism sleeve 44, on which a roller 45 of the angle lever 41 is resiliently supported. The roller 45 is held by the force of the spring 46 on the sleeve 44.
  • the regulator sleeve 44 moves to the left in the direction of the arrow 47, as a result of which the angle lever 41 is pivoted and the rollers 43 are moved out of the locking position in the link guide 36. In this way, the shutdown of the internal combustion engine is triggered when the permissible speed is exceeded.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

For shutting down a fuel injection combustion there is provided a spring-loaded and lockable stop (8), the locking member (13) of which can be retracted in a controlled manner by an operation paramenter, e.g. the number of revolutions. In the released position, the stop (8) acts on the fuel amount control rod (1) and moves this rod into zero-delivery position. Adjustment of the fuel amount control-rod (1) is effected by means of a servomotor, noting that on starting the fuel injection combustion engine the stop (8) is drawn by this servomotor into a position in which the stop is maintained by the locking member (13) until retracting same. This locking position of the lockable stop (8) simultaneously represents a stop for the maximum amount of fuel supplied by the injection pump and the fuel amount control rod can, during operation, be adjusted to any desired and just required amount of fuel supplied. If there occurs an inadmissible operating condition, e.g. an overspeed, the lockable stop (8) is released and can, with the aid of the force of the pretensioned shutdown spring, retract the control rod (1) into zero-delivery position out of any position of the control rod.

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Abschaltung einer Einspritzbrennkraftmaschine, bei welcher eine Fördermengenregelstange einer Einspritzpumpe mit einem verstellbaren, im Bereich in einer den gesamten Verstellbereich der Fördermengenregelstange freigebenden Stellung von einem Verriegelungsglied verriegelbaren Anschlag zusammenwirkt, der in seiner verriegelten Stellung durch eine Abstellfeder im Sinne der Bewegung der Fördermengenregelstange auf Null-Förderung beaufschlagt ist, wobei das Verriegelungsglied in Abhängigkeitvon einem Betriebszustand lösbar ist. Bei Einspritzbrennkraftmaschinen ist es bereits bekannt, die Fördermengenregelstange im Betrieb in Abhängigkeit von der Drehzahl, dem Ladedruck, dem atmosphärischen Druck, der Temperatur oder anderen Grössen, zu verstellen, um eine vollständige, rauchfreie Verbrennung sicherzustellen. Es ist weiters bereits bekannt, die maximale Fördermenge durch einen gesonderten verstellbaren Anschlag zu begrenzen, welche in Abhängigkeit von Betriebsgrössen verstellt wird. Die Abschaltung von Einspritzbrennkraftmaschinen muss mit Sicherheit dann gewährleistet werden, wenn die Brennkraftmaschine eine zu hohe Drehzahl annimmt. Insbesondere bei elektronischen Regeleinrichtungen muss auch bei Störungen der Stromversorgung, welche eine einwandfreie Funktion der Regelelektronik gefährden, eine Abschaltung der Einspritzbrennkraftmaschine automatisch erfolgen. Als Abstelleinrichtungen bei Überdrehzahl sind bereits einfache Fliehkraftschalter bekannt geworden, welche bei ihrem Ansprechen die Stromversorgung unterbrechen oder aber einen Stromkreis für die Betätigung eines elektrischen Ventiles schliessen. In den bekannten Fällen wurde aber lediglich die Kraftstoffzufuhr auf diese Weise unterbunden, wodurch sich eine gewisse Verzögerung ergab, welche bereits zu Beschädigungen der Brennkraftmaschine führen kann.The invention relates to a device for switching off an injection internal combustion engine, in which a delivery rate control rod of an injection pump interacts with an adjustable stop, which can be locked in the position in a position that releases the entire adjustment range of the delivery rate control rod, by a locking member, which in its locked position by means of a shutdown spring the movement of the delivery control rod is subjected to zero delivery, the locking member being releasable depending on an operating state. With injection internal combustion engines, it is already known to adjust the delivery control rod during operation depending on the speed, the boost pressure, the atmospheric pressure, the temperature or other variables in order to ensure complete, smoke-free combustion. It is also already known to limit the maximum delivery rate by means of a separate adjustable stop, which is adjusted depending on the size of the company. The deactivation of injection internal combustion engines must be guaranteed with certainty when the internal combustion engine assumes an excessively high speed. In particular in the case of electronic control devices, the injection internal combustion engine must also be switched off automatically in the event of faults in the power supply which endanger the proper functioning of the control electronics. Simple centrifugal switches are already known as shutdown devices at overspeed, which interrupt the power supply when they respond or close a circuit for the actuation of an electric valve. In the known cases, however, only the fuel supply was prevented in this way, which resulted in a certain delay, which can already lead to damage to the internal combustion engine.

Aus der DE-OS Nr. 2533630 ist bereits eine Einrichtung bekanntgeworden, bei welcher ein federbelasteter schwenkbarer Anschlag unmittelbar mit einer Fördermengenregelstange zusammenwirkt. Dieser schwenkbare Anschlag muss zunächst in eine Lage gebracht werden, bei welcher die Feder vorgespannt wird und wird durch einen Verriegelungszapfen in dieser Lage so lange gehalten, als der Verriegelungszapfen nicht gelöst ist. Nach dem Lösen des Verriegelungszapfens verschwenkt dieser verschwenkbare Anschlag mit der Kraft der vorgespannten Feder und bewegt hiebei die Förderregelstange in die Nullstellung.From DE-OS No. 2533630 a device has already become known in which a spring-loaded pivotable stop interacts directly with a delivery control rod. This pivotable stop must first be brought into a position in which the spring is preloaded and is held in this position by a locking pin as long as the locking pin is not released. After loosening the locking pin, this pivotable stop pivots with the force of the preloaded spring and moves the conveyor control rod into the zero position.

Die Erfindung zielt nun darauf ab, eine einfache und betriebssichere Einrichtung der eingangs genannten Art zu schaffen, bei welcher die für die Abstellung erforderliche Federkraft des Anschlages unmittelbar bei in Betriebnahme der Brennkraftsmaschine durch Aufziehen der Abstellfeder unter Zuhilfenahme eines Stellmotors bzw. eines Schrittmotors erfolgen kann, welcher üblicherweise für die Verstellung der Fördermengenregelstange im Betrieb verwendet wird. Die Vorteile der bekannten Ausbildung, bei welcher die Verriegelung eines derartigen federbelasteten Anschlages lediglich einem Bruchteil der eigentlichen Abstellkräfte aufnehmen muss und daher auch mit verhältnismässig geringem Kraftaufwand gelöst werden kann, sollen bei dieser Ausbildung voll erhalten bleiben. Zur Lösung dieserAufgabe besteht die Erfindung ausgehend von der obengenannten Einrichtung im wesentlichen darin, dass das von einem Stellmotor, insbesondere Schrittmotor, betätigte Verstellglied für die Fördermengenverstellung unter Zwischenschaltung einer Schleppfeder an der Fördermengenregelstange angreift, dass der verriegel bare Anschlag mit einem weiteren Anschlag verbunden ist, welcher bei Verstellung des Verstellgliedes in Richtung maximale Fördermenge der Fördermengenregelstange mit einem Gegenanschlag des Verstellgliedes zusammenwirkt, wobei die Abstellfeder bis zum Eingriff des Verriegelungsgliedes in den verriegelbaren Anschlag gespannt wird, und dass der weitere Anschlag in Betrieb ausser Eingriff mit dem Gegenschlag des Verstellgliedes steht. Bei dieser Ausbildung ist es nunmehr lediglich erforderlich, in der Regelelektronik ein entsprechendes Startprogramm vorzusehen. Dadurch, dass das von einem Stellmotor, insbesondere Schrittmotor, betätigte Verstellglied für die Fördermengenverstellung unter Zwischenschaltung einer Schleppfeder an der Fördermengenregelstange angreift, wird sichergestellt, dass die Abstellung in die Null-Förderstellung unabhängig von der Stellung des Verstellgliedes auch dann erfolgt, wenn in der Kraftübertragung vom Stellmotor auf das Verstellglied Störungen aufgetreten sind. Es wird weiters durch diese Massnahmen unmittelbar vor dem Startvorgang das Verstellglied in eine, der maximalen Fördermenge der Fördermengenregelstange entsprechende bzw. diese geringfügig übersteigende Position gebracht und nimmt bei diesem Verstellweg den verriegelbaren Anschlag entgegen der Kraft der Abstellfeder mit. Die Abstellfeder wird hiebei bis zum Eingriff des Verriegelungsgliedes im Anschlag gespannt und bleibt auch dann gespannt, wenn das Verstellglied in der Folge vom Stellmotor in Richtung Null-Förderung in die entsprechende Betriebslage zurückgezogen wird. Der verriegelbare Anschlag gelangt nach dem Zurückbewegen des Verstellgliedes in eine Stellung, bei welcher der weitere Anschlag nicht mehr mit dem Gegenanschlag des Verstellgliedes kolidieren kann, so dass der verriegelbare Anschlag erst dann wiederum zur Wirkung kommt, wenn das Verriegelungsglied gelöst wird und die Fördermengenregelstange mit der Kraft der Abstellfeder in Richtung Null-Förderung bewegt wird.The invention now aims to provide a simple and reliable device of the type mentioned at the outset, in which the spring force of the stop required for the shutdown can take place directly when the internal combustion engine is put into operation by pulling up the shut-off spring with the aid of a servomotor or a stepping motor, which is usually used for the adjustment of the flow control rod during operation. The advantages of the known design, in which the locking of such a spring-loaded stop only has to absorb a fraction of the actual shutdown forces and can therefore also be released with relatively little effort, should be fully retained in this design. To solve this task, the invention essentially starts from the above-mentioned device in that the actuating element actuated by a servomotor, in particular a stepping motor, acts on the conveying quantity control rod with the interposition of a trailing spring, that the lockable stop is connected to a further stop, which cooperates with a counter-stop of the adjusting member when the adjusting member is moved in the direction of the maximum delivery rate of the delivery quantity control rod, the stop spring being tensioned until the locking member engages in the lockable stop, and that the further stop is in operation out of engagement with the counter-blow of the adjusting member. With this design, it is now only necessary to provide a corresponding start program in the control electronics. The fact that the actuator for the delivery rate adjustment, which is actuated by an actuator, in particular a stepping motor, acts on the delivery rate control rod with the interposition of a trailing spring, ensures that the switch to the zero delivery position takes place regardless of the position of the adjustment member even when in the power transmission malfunctions have occurred from the actuator to the actuator. Furthermore, these measures bring the adjusting element into a position corresponding to the maximum delivery quantity of the delivery quantity control rod or slightly exceeding this position immediately before the starting process and takes the lockable stop against the force of the stop spring with this adjustment path. The stop spring is tensioned until the locking member engages in the stop and remains tensioned even if the adjusting member is subsequently pulled back into the corresponding operating position by the servomotor in the direction of zero conveyance. After the adjustment member has been moved back, the lockable stop comes into a position in which the further stop can no longer collide with the counter-stop of the adjustment member, so that the lockable stop only comes into effect again when the locking member is released and the delivery rate control rod with the Force of the stop spring is moved towards zero conveyance.

Der verriegelbare Anschlag kann in einfacher Weise von einem Anker eines Elektromagneten verriegelt werden, welcher im stromlosen Zustand den Abstellweg des Anschlages freigibt. Ein derartiger Anker eines Elektromagneten kann hiebei in einer Ausnehmung des verriegelbaren Anschlages verrastet sein und bei Stromloswerden des Elektromagneten durch eine Rückholfeder aus der Verriegelungsstellung herausgezogen werden. Die Ausbildung kann aber in vorteilhafter Weise so getroffen werden, dass das Verriegelungsglied von einem in einer abgewinkelten Kulissenführung des Anschlages eingreifenden, verlagerbaren Zapfen gebildet ist. In diesem Fall kann zur weiteren Verriegelung der erforderlichen Auslösekräfte der Zapfen mit einer Rolle versehen sein, welche in einem Teil der Kulisse verrastbar ist. Bei Verwendung derartiger Kulissen kann in vorteilhafter Weise der in die Kulisse eingreifende, verlagerbare Zapfen entgegen der Kraft einer Rückstellfeder, insbesondere durch ein Fliehkraftmesswerk, verlagerbar sein, wodurch nicht nur Störungen in der Stromversorgung, sondern auch dem unzulässigen Auftreten von Überdrehzahlen durch Abschalten der Brennkraftmaschine Rechnung getragen werden kann.The lockable stop can be locked in a simple manner by an armature of an electromagnet, which in the de-energized state releases the stop path of the stop. Such an armature of an electromagnet can be locked in a recess of the lockable stop and, when the electromagnet is de-energized, by a return spring from the ver locking position can be pulled out. However, the design can advantageously be made such that the locking member is formed by a displaceable pin which engages in an angled link guide of the stop. In this case, the pin can be provided with a roller for further locking of the required triggering forces, which roller can be locked in part of the setting. When using such baffles, the displaceable pin engaging in the baffle can advantageously be displaced against the force of a return spring, in particular by a centrifugal force measuring mechanism, which not only takes into account faults in the power supply, but also the inadmissible occurrence of overspeed by switching off the internal combustion engine can be worn.

Die Ausbildung kann hiebei so getroffen sein, dass der verriegelbare Anschlag und der weitere Anschlag an einem schwenkbar gelagerten Hebel angeordnet sind, an welchem eine Feder angreift, und dass der Anschlag in geringerem Abstand von der Schwenkachse des Hebels angeordnet ist als der weitere Anschlag. Auf diese Weise lässt sich der weitere Anschlag nach dem Aufziehen der Abstellfeder besonders einfach ausser Eingriff mit dem Gegenanschlag des Verstellgliedes bringen, wie dies für den störungsfreien Betrieb der Regeleinrichtung erforderlich ist. In besonders einfacher Weise ist die Ausbildung hiebei so getroffen, dass der weitere Anschlag von einem hakenförmigen Teil des verriegelbaren Anschlages gebildet ist, welcher in einer ersten Schwenklage des verriegelbaren Anschlages Vorsprünge, insbesondere Mitnehmerbolzen, des Verstellgliedes übergreift und in einer zweiten Schwenklage, welche der Betriebsstellung entspricht, ausser Eingriff mit den Vorsprüngen steht, wobei vorzugsweise der verriegelbare Anschlag federnd in die der Betriebsstellung entsprechende Schwenklage gedrückt ist. Auf diese Weise wird eine konstruktiv besonders einfache Ausbildung geschaffen.The design can be made so that the lockable stop and the further stop are arranged on a pivotably mounted lever on which a spring engages, and that the stop is arranged at a smaller distance from the pivot axis of the lever than the further stop. In this way, the further stop can be brought out of engagement with the counter-stop of the adjusting member in a particularly simple manner after the opening of the stop spring, as is necessary for the trouble-free operation of the control device. In a particularly simple manner, the design is such that the further stop is formed by a hook-shaped part of the lockable stop, which overlaps projections, in particular driver bolts, of the adjusting member in a first swivel position of the lockable stop and in a second swivel position, which corresponds to the operating position corresponds to, is out of engagement with the projections, wherein preferably the lockable stop is pressed resiliently into the pivot position corresponding to the operating position. In this way, a structurally particularly simple training is created.

Die Erfindung wird nachfolgend an Hand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.

In dieser zeigen Fig. 1 eine schematische Darstellung des Endes der Regelstange, des Verstellgliedes, sowie des verriegelbaren Anschlages bei abgeschalteter Brennkraftmaschine, Fig. 2 eine analoge Darstellung des verriegelbaren Anschlages in der Betriebsstellung, Fig. 3 einen Schnitt durch einen Regler für eine Brennstoffeinspritzpumpe, Fig. 4 einen Schnitt nach der Linie IV-IV der Fig. 3, Fig. 5 einen Schnitt nach der Linie V-V der Fig. 3, Fig. 6 einen Schnitt nach der Linie VI-VI der Fig. 3, Fig. 7 einen Schnitt nach der Linie VII-VII der Fig. 4, und Fig. 8 eine schematische Darstellung analog der Darstellung in Fig. 7 mit zusätzlichem Fliehkraftmesswerk.1 shows a schematic illustration of the end of the control rod, the adjusting member, and the lockable stop when the internal combustion engine is switched off, FIG. 2 shows an analogous illustration of the lockable stop in the operating position, FIG. 3 shows a section through a controller for a fuel injection pump, 4 shows a section along line IV-IV of FIG. 3, FIG. 5 shows a section along line VV of FIG. 3, FIG. 6 shows a section along line VI-VI of FIG. 3, FIG. 7 shows a section Section along the line VII-VII of Fig. 4, and Fig. 8 is a schematic representation analogous to the representation in Fig. 7 with an additional centrifugal force measuring device.

In Fig. 1 ist die Fördermengenregelstange der Einspritzpumpe mit 1 bezeichnet. Eine Verschiebung der Regelstange 1 im Sinne des Doppelpfeiles 2 nach oben bewirkt eine Veringerung der Fördermenge und eine Verschiebung im Sinne des Doppelpfeiles 2 nach unten eine Erhöhung der Fördermenge der Einspritzpumpe. Mit der Regelstange 1 ist ein von einer Platte 3 gebildeter Gegenschlag starr verbunden, welcher durch Muttern 4 in seiner gewählten Lage festgelegt werden kann. Die Verstellung der Regelstange 1 erfolgt durch ein als Zahnstange 5 ausgebildetes Verstellglied, welche mit dem Ritzel eines nicht dargestellten Schrittmotors kämmt. Zwischen der Zahnstange 5, welche hohl ausgebildet ist, und der Regelstange 1 ist eine Schleppfeder 6 angeordnet, welche immer dann, wenn die Verstellung der Regel- .stange 1 gerade nicht möglich ist, den erforderlichen Verstellhub, welcher vom Schrittmotor vorgegeben wird, speichert. Mit der Zahnstange 5 ist ein Gegenanschlag 7 starr verbunden.In Fig. 1, the flow control rod of the injection pump is designated 1. A shift of the control rod 1 in the direction of the double arrow 2 upwards causes a reduction in the delivery rate and a shift in the direction of the double arrow 2 downwards increases the delivery rate of the injection pump. A counterstrike formed by a plate 3 is rigidly connected to the control rod 1 and can be fixed in its chosen position by nuts 4. The control rod 1 is adjusted by an adjusting element designed as a toothed rack 5, which meshes with the pinion of a stepping motor, not shown. Between the rack 5, which is hollow, and the control rod 1, a drag spring 6 is arranged, which saves the required adjustment stroke, which is specified by the stepper motor, whenever the adjustment of the control rod 1 is not possible. A counter stop 7 is rigidly connected to the rack 5.

Die beiden Gegenanschläge 3 und 7 wirken nun mit dem verriegelbaren Anschlag 8 zusammen, welcher mit einer Abstellfeder verbunden ist. Die Wirkrichtung der Abstellfeder ist durch den Pfeil 9 angedeutet. Der verriegelbare Anschlag 8 ist als Haken ausgebildet, dessen hakenförmiger Endteil 10 den Gegenanschlag 7 der Zahnstange bei abgestellter Brennkraftmaschine übergreift. Der Anschlag 8 übergreift weiters mit einem Vorsprung 11 den Gegenanschlag 3 der Fördermengenregelstange, so dass bei Auslösung der Verriegelung die Regelstange 1 in die Stoppstellung gezogen wird. Der verriegelbare Anschlag 8 ist hiebei um eine Schwenkachse 12 schwenkbar angelenkt. Das Verriegelungsglied wird von dem Anker 13 eines Elektromagneten gebildet, welcher hinter einer entsprechenden Ausnehmung 14 des Anschlages 8 im Betrieb verrastet wird.The two counter stops 3 and 7 now interact with the lockable stop 8, which is connected to a stop spring. The direction of action of the stop spring is indicated by the arrow 9. The lockable stop 8 is designed as a hook, the hook-shaped end part 10 of which engages over the counter stop 7 of the toothed rack when the internal combustion engine is switched off. The stop 8 also overlaps with a projection 11 the counter-stop 3 of the flow control rod, so that the control rod 1 is pulled into the stop position when the lock is triggered. The lockable stop 8 is pivotally articulated about a pivot axis 12. The locking member is formed by the armature 13 of an electromagnet, which is locked behind a corresponding recess 14 of the stop 8 in operation.

Vor dem Starten der Brennkraftmaschine wird die Zahnstange 5 durch den Schrittmotor in Richtung des Doppelpfeiles 2 nach unten verschoben, wobei die Regelstange 1 in die Vollaststellung zuzüglich eines vorbestimmten Mehrhubes gelangt. Bei dieser Bewegung der Zahnstange 5 sowie der Regelstange 1 wird der verriegelbare Anschlag 8 entgegen der Wirkrichtung 9 der Abstellfeder nach unten gezogen und es wird somit die Abstellfeder vorgespannt. Sobald der Anker 13 des Elektromagneten in die entsprechende Rast 14 eintreten kann, verschwenkt eine Zugfeder 15 den Anschlag 8 um seine Schwenkachse 12 in die in Fig. 2 dargestellte Betriebsstellung.Before the internal combustion engine is started, the toothed rack 5 is moved downward by the stepping motor in the direction of the double arrow 2, the control rod 1 reaching the full load position plus a predetermined additional stroke. During this movement of the rack 5 and the control rod 1, the lockable stop 8 is pulled down against the direction of action 9 of the stop spring and the stop spring is thus preloaded. As soon as the armature 13 of the electromagnet can enter the corresponding latch 14, a tension spring 15 pivots the stop 8 about its pivot axis 12 into the operating position shown in FIG. 2.

In Fig. 2 ist der Anker 13 des Elektromagneten an der Ausnehmung 14 des verriegelbaren Anschlages 8 abgestützt, wobei der hakenförmige Endteil 10 aus der Bewegungsbahn des Gegenanschlages 7 herausgeschwenkt ist. Die Schwenkbewegung des verriegelbaren Anschlages 8 um die Schwenkachse 12 wird durch eine Anschlagrolle 16 begrenzt. In der Stellung nach Fig. 2 bestimmt der Vorsprung 11 der Einspritzpumpen im Betrieb und der Gegenanschlag 3 kann aus dieser Vollaststellung heraus durch die Zahnstange 5 unter Zwischenschaltung der Schleppfeder 6 in jede geeignete Betriebsstellung verschoben werden. Bei einem Zurückziehen des Ankers 13 des Hubmagneten wird die Verriegelung des Anschlages 8 aufgehoben und dieser Anschlag 8 wird durch die Kraft der vorgespannten Abstellfeder in Richtung des Pfeiles 9 zurückgezogen, wobei der Gegenanschlag 3 und damit die Regelstange 1 in die Stoppstellung gezogen wird.2, the armature 13 of the electromagnet is supported on the recess 14 of the lockable stop 8, the hook-shaped end part 10 being pivoted out of the movement path of the counter-stop 7. The pivoting movement of the lockable stop 8 about the pivot axis 12 is limited by a stop roller 16. In the position according to FIG. 2, the projection 11 of the injection pumps in operation and the counter stop 3 can be moved out of this full load position by the rack 5 with the interposition of the drag spring 6 into any suitable operating position. When the armature 13 of the lifting magnet is pulled back, the locking of the stop 8 is released and this stop 8 is moved in the direction by the force of the prestressed stop spring the arrow 9 withdrawn, the counter stop 3 and thus the control rod 1 being pulled into the stop position.

In Fig. 3 ist eine konstruktive Ausgestaltung eines derartigen Reglers detailliert dargestellt. Die Abstellfeder ist mit 17 bezeichnet und wirkt über einen zweiarmigen Hebel 18 auf den Gegenanschlag 3 der Regelstange. Am freien Ende dieses zweiarmigen Hebels 18 ist die Schwenkachse 12 des verriegelbaren Anschlages 8 angeordnet. Die Feder 15 ist hiebei im Sinne des Pfeiles 19 vorgespannt und verschwenkt den Anschlag 8 nach Verriegelung des Anschlages in die Stellung 8', wobei die Feder die Stellung 15' einnimmt. Die Schleppfeder ist wiederum mit 6 bezeichnet. Zusätzlich zu den Bezugszeichen der Fig. 1 und 2 ist in Fig. 3 der Schrittmotor mit 20 und ein Fliehkraftmesswerk mit 21 bezeichnet. Die Einspritzbrennkraftmaschine ist mit 22 angedeutet, wobei die Nockenwelle 23 der Einspritzbrennkraftmachine 22 das Fliehkraftmesswerk 21 antreibt und durch Lager 24 im Motor 22 gelagert ist.3 shows a detailed design of such a controller. The stop spring is designated 17 and acts via a two-armed lever 18 on the counter stop 3 of the control rod. At the free end of this two-armed lever 18, the pivot axis 12 of the lockable stop 8 is arranged. The spring 15 is preloaded in the direction of the arrow 19 and pivots the stop 8 after the stop has been locked into the position 8 ', the spring occupying the position 15'. The drag spring is again designated 6. In addition to the reference numerals of FIGS. 1 and 2, the stepping motor is designated by 20 in FIG. 3 and a centrifugal force measuring mechanism is designated by 21. The injection internal combustion engine is indicated at 22, the camshaft 23 of the injection internal combustion engine 22 driving the centrifugal force measuring device 21 and being supported in the engine 22 by bearings 24.

Das Ritzel 25 des Schrittmotors 20 kämmt mit der Zahnstange 5, wobei die Verschiebung der Zahnstange 5 unter Zwischenschaltung der Schleppfeder 6 auf die Regelstange 1 übertragen wird.The pinion 25 of the stepping motor 20 meshes with the toothed rack 5, the displacement of the toothed rack 5 being transmitted to the control rod 1 with the trailing spring 6 interposed.

Die in Fig. 3 dargestellte Stellung des verriegelbaren Anschlages 8 entspricht derjenigen Stellung, welche es erlaubt, die Abstellfeder 17 aufzuziehen, wobei die Zahnstange 5 durch den Schrittmotor 20 nach rechts in Richtung Vollaststellung der Regelstange 1 bewegt wird.The position of the lockable stop 8 shown in FIG. 3 corresponds to the position which makes it possible to open the stop spring 17, the toothed rack 5 being moved to the right in the direction of the full load position of the control rod 1 by the stepping motor 20.

In Fig. 4 ist der Gegenanschlag 3 der Fördermengenregelstange 1 ersichtlich, welcher von Mitnehmerbolzen 26 hintergriffen wird. Diese Mitnehmerbolzen 26 bilden die Schwenkachse 12 des verriegelbaren Anschlages 8 und bilden gleichzeitig auch die Anlenkachse des um eine gehäusefeste Achse 27 schwenkbaren zweiarmigen Hebels 18, an welchem die Abstellfeder 17 angreift. Mit dem verriegelbaren Anschlag 8 ist eine Kulisse 28 starr verbunden, welche in den Fig. 7 und 8 deutlich dargestellt ist. In diese Kulisse 28 greift ein um eine gehäusefeste Achse 29 schwenkbar gelagerter Zapfen ein, wobei die Verschwenkung über einen Winkelhebel 30 und einen Hubmagneten 31 erfolgt.In Fig. 4, the counter-stop 3 of the flow control rod 1 can be seen, which is engaged by driver pins 26. These drive pins 26 form the pivot axis 12 of the lockable stop 8 and at the same time also form the articulation axis of the two-armed lever 18 which can be pivoted about a shaft 27 fixed to the housing and on which the stop spring 17 acts. A backdrop 28 is rigidly connected to the lockable stop 8, which is clearly shown in FIGS. 7 and 8. A pin pivotably mounted about an axis 29 fixed to the housing engages in this link 28, the pivoting taking place via an angle lever 30 and a lifting magnet 31.

In Fig. 5 ist ersichtlich, dass der Gegenanschlag 7 der Zahnstange 5 von starr mit der Zahnstange verbundenen Mitnehmerbolzen 32 gebildet ist, welche in den hakenförmigen Endteil 10 des verriegelbaren Anschlages 8 eingreifen, solange der verriegelbare Anschlag 8 noch nicht in seine Betriebsstellung verschwenkt ist. Mit 33 ist die Führung bezeichnet, welche mit dem Gehäuse verbunden ist.In Fig. 5 it can be seen that the counter-stop 7 of the rack 5 is formed by driver bolts 32 rigidly connected to the rack, which engage in the hook-shaped end part 10 of the lockable stop 8, as long as the lockable stop 8 has not yet been pivoted into its operating position. With 33 the guide is designated, which is connected to the housing.

In Fig. 6 ist das Ritzel 25 des Schrittmotors 20 im Eingriff mit der Zahnstange 5 dargestellt. Der verriegelbare Anschlag 8 trägt, wie in dieser Darstellung deutlich sichtbar ist, die Kulisse 28, in welche ein von dem Winkelhebel 30 getragener Zapfen 34 eingreift. Das Gehäuse des Reglers ist hier mit 35 bezeichnet.6, the pinion 25 of the stepping motor 20 is shown in engagement with the rack 5. As can be clearly seen in this illustration, the lockable stop 8 bears the link 28 into which a pin 34 carried by the angle lever 30 engages. The housing of the controller is designated 35 here.

Wie aus Fig. 7 hervorgeht, weist die Kulisse 28 eine abgewinkelte Kulissenführung 36 auf, in welchedervomHubmagneten31 über den Winkelhebei 30 um die Schwenkachse 29 verschwenkbare Zapfen 34 eingreift. In der Darstellung in Fig. 7 ist unter Vermittlung der Mitnehmerbolzen 32 der verriegelbare Anschlag 8 in seine Endstellung gebracht und die Abstellfeder 17 voll aufgezogen. Der verriegelbare Anschlag 8 wird unter Vermittlung der Feder 15 anschliessend nach oben verschwenkt, wobei der Zapfen 34 in die Rast 37 der Kulissenführung 36 gelangt. In dieser Stellung bleibt der verriegelbare Anschlag 8 auf Grund der Stellung seiner Kulisse 28 verriegelt, wobei die Haltekraft vom Winkelhebel 30 in der Lagerung desselben an der Achse 29 aufgenommen wird. Es muss somit die Abstellkraft nicht durch den Magneten kompensiert werden. Bei Ausfall der Stromversorgung wird der Hubmagnet 31 stromlos und der Anker desselben wird durch die Feder 38 in Richtung des Pfeiles 39 verschoben, wodurch der Zapfen 34 aus der Rast 37 austritt. Unter der Wirkung der Abstellfeder 17 wird nunmehr der Anschlag 8 nach links bewegt, wobei der Verschiebeweg durch die Länge der Kulissenführung 36 begrenzt ist. Bei dieser Bewegung wird die Fördermengenregelstange 1 in Richtung Null-förderung verschoben.As can be seen from FIG. 7, the link 28 has an angled link guide 36, in which pins 34, which can be pivoted by the lifting magnet 31 via the angle lifter 30 about the pivot axis 29, engage. In the illustration in FIG. 7, the lockable stop 8 is brought into its end position and the stop spring 17 is fully wound up by means of the driving pins 32. The lockable stop 8 is then pivoted upwards by means of the spring 15, the pin 34 reaching the catch 37 of the link guide 36. In this position, the lockable stop 8 remains locked due to the position of its link 28, the holding force being absorbed by the angle lever 30 in its storage on the axis 29. The shutdown force does not therefore have to be compensated for by the magnet. If the power supply fails, the solenoid 31 is de-energized and the armature of the solenoid is displaced by the spring 38 in the direction of the arrow 39, as a result of which the pin 34 emerges from the catch 37. Under the action of the stop spring 17, the stop 8 is now moved to the left, the displacement path being limited by the length of the link guide 36. During this movement, the delivery rate control rod 1 is shifted in the direction of zero delivery.

In Fig. 8 greift in die Kulisse 28 ein um eine Schwenkachse 40 schwenkbarer Winkelhebel 41 ein, welcher an seinem freien Ende eine Rolle 42 trägt. Die Rolle 42 ist innerhalb der Kulissenführung 36 verrastbar bzw. gibt nach Verschwenken des Winkelhebels 41 die Bewegung des verriegelbaren Anschlages 8 frei. Die Anlenkachse 40 ist gehäusefest. An der Nockenwelle 23 der Brennkraftmaschine ist ein Fliehgewichtmesswerk angeschlossen, dessen Fliehgewichte mit 43 bezeichnet sind. Das Fliehgewichtmesswerk weist eine Messwerksmuffe 44 auf, an welcher eine Rolle 45 des Winkelhebels 41 federnd abgestützt ist. Die Rolle 45 wird hiebei durch die Kraft der Feder 46 an der Muffe 44 gehalten. Bei zunehmender Drehzahl bewegt sich die Reglermuffe 44 im Sinne des Pfeiles 47 nach links, wodurch der Winkelhebel 41 verschwenkt wird und die Rollen 43 aus der Raststellung in der Kulissenführung 36 herausbewegt werden. Auf diese Weise wird bei Überschreiten der zulässigen Drehzahl die Abstellung der Brennkraftmaschine ausgelöst.8, an angle lever 41, which can be pivoted about a pivot axis 40 and which carries a roller 42 at its free end, engages in the link 28. The roller 42 can be locked within the link guide 36 or releases the movement of the lockable stop 8 after pivoting the angle lever 41. The articulation axis 40 is fixed to the housing. A flyweight measuring unit is connected to the camshaft 23 of the internal combustion engine, the flyweights of which are designated by 43. The flyweight measuring mechanism has a measuring mechanism sleeve 44, on which a roller 45 of the angle lever 41 is resiliently supported. The roller 45 is held by the force of the spring 46 on the sleeve 44. With increasing speed, the regulator sleeve 44 moves to the left in the direction of the arrow 47, as a result of which the angle lever 41 is pivoted and the rollers 43 are moved out of the locking position in the link guide 36. In this way, the shutdown of the internal combustion engine is triggered when the permissible speed is exceeded.

Claims (7)

1. Device to switch off an injection internal combustion engine, wherein a capacity regulator rod (1) of an injection pump cooperates with an adjustable stop (8) which can be bolted in operation in a position clearing the whole adjusting range of the regulator rod (1) by a bolting device (13), which stop is subjected in its bolted position to the action of a stopping spring (17) to zero-delivery in the sense of motion of the regulator rod (1), the bolting device (13) being releasable in dependance on an operational state, characterized in that the adjusting device (5) regulating the delivering capacity and actuated by a servomotor, in particular by a stepping motor, acts upon the regulator rod (1) by transmission of a slip spring (6), that the boltable stop (8) is connected with a further stop (10), which cooperates with a counter-stop (7) of the adjusting device (5) when moving the adjusting device (5) in the sense of maximum delivery of the regulator rod (1), the switch-offspring (17) being stretched to the point of the bolting device (13) engaging the boltable stop (8), and that the further stop (10) disengages the counter-stop (7) of the adjusting device (5) in operation. 4
2. Device as claimed in Claim 1, characterized in that the bolting device (13) of the boltable stop (8) is formed by an armature of an electromagnet, which clears the stopping journey of the stop when there is no current.
3. Device as claimed in Claim 1 or 2, characterized in that the bolting device (13) is formed by a displaceable pin (34) engaging an angular crank guidance (36), the stop (8).
4. Device as claimed in one of the Claims 1,2 or 3, characterized in that the displaceable pin (34) engaging the crank (28) is displaceable against the force of a readjusting spring, in particular by a centrifugal force measuring device (21).
5. Device as claimed in one of the Claims 1 to 4, characterized in that the boltable stop (8) and the further stop (10) are arranged on a pivotally mounted lever, upon which a spring (15) is acting, and that the stop (11) is arranged at a lower distance from the pivoting axis (12) of the lever than the further stop (10).
6. Device as claimed in one of the Claims 1 to 5, characterized in that the further stop (10) is formed by a hooked portion of the boltable stop (8) which embraces counter-stops, in particular driving pins (32), of the adjusting device (5) in a first pivotal position of the boltable stop (8) and which disengages the counter-stops in a second pivotal position corresponding to the operational position.
7. Device as claimed in one of the Claims 1 to 6, characterized in that the boltable stop (8) is springily pressed into the pivotal position corresponding to the operational position.
EP83890113A 1982-07-09 1983-07-06 Device to switch off an injection internal-combustion engine Expired EP0098827B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2686/82 1982-07-09
AT0268682A AT387263B (en) 1982-07-09 1982-07-09 DEVICE FOR STOPPING AN INJECTION INTERNAL COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
EP0098827A1 EP0098827A1 (en) 1984-01-18
EP0098827B1 true EP0098827B1 (en) 1985-09-25

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EP83890113A Expired EP0098827B1 (en) 1982-07-09 1983-07-06 Device to switch off an injection internal-combustion engine

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US (1) US4512306A (en)
EP (1) EP0098827B1 (en)
AT (2) AT387263B (en)
DE (1) DE3360886D1 (en)

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Publication number Priority date Publication date Assignee Title
US4947814A (en) * 1989-02-14 1990-08-14 Cummins Engine Company, Inc. Retractable throttle stop

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB816449A (en) * 1957-02-25 1959-07-15 Cav Ltd Liquid fuel supply systems for internal combustion engines
US2708921A (en) * 1950-03-21 1955-05-24 Daimler Benz Ag Control device for combustion engines
DE1197275B (en) * 1961-11-20 1965-07-22 Linde Eismasch Ag Device for influencing a controllable injection pump on an internal combustion engine with a centrifugal governor
GB1239527A (en) * 1968-07-30 1971-07-14
DE2332010C2 (en) * 1973-06-23 1982-03-25 Daimler-Benz Ag, 7000 Stuttgart Fuel injection pump for an air-compressing injection internal combustion engine
DD116894A1 (en) * 1974-10-21 1975-12-12
DE2804038A1 (en) * 1978-01-31 1979-08-09 Bosch Gmbh Robert INJECTION PUMP WITH ELECTRONICALLY CONTROLLED FULL LOAD STOP
DE2848233A1 (en) * 1978-11-07 1980-05-08 Bosch Gmbh Robert Diesel engine control system - has spring loaded slide locking setting member into stopping position with solenoid off
US4372267A (en) * 1980-02-20 1983-02-08 Lucas Industries Limited Fuel pumping apparatus
DE3033971A1 (en) * 1980-09-10 1982-04-22 Klöckner-Humboldt-Deutz AG, 5000 Köln STOPPING DEVICE FOR A SELF-IGNITION COMBUSTION ENGINE
US4350127A (en) * 1981-03-25 1982-09-21 Caterpillar Tractor Co. Torque spring adjustment mechanism

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ATA268682A (en) 1988-05-15
AT387263B (en) 1988-12-27
US4512306A (en) 1985-04-23
ATE15829T1 (en) 1985-10-15
EP0098827A1 (en) 1984-01-18
DE3360886D1 (en) 1985-10-31

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