EP0475955A1 - Fuel injection pump for internal combustion engines. - Google Patents

Fuel injection pump for internal combustion engines.

Info

Publication number
EP0475955A1
EP0475955A1 EP90906864A EP90906864A EP0475955A1 EP 0475955 A1 EP0475955 A1 EP 0475955A1 EP 90906864 A EP90906864 A EP 90906864A EP 90906864 A EP90906864 A EP 90906864A EP 0475955 A1 EP0475955 A1 EP 0475955A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection pump
working element
stop lever
atmospheric pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90906864A
Other languages
German (de)
French (fr)
Other versions
EP0475955B1 (en
Inventor
Karl Konrath
Claus Koester
Wolf-Ruediger Walk
Karl-Friedrich Ruesseler
Helmut Tschoeke
Mohammad-Ali Khosrawi
Alfons Schoetz
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0475955A1 publication Critical patent/EP0475955A1/en
Application granted granted Critical
Publication of EP0475955B1 publication Critical patent/EP0475955B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/06—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid
    • F02D1/065—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid of intake of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance

Definitions

  • the invention relates to a fuel injection pump for internal combustion engines according to the preamble of claim 1.
  • DE-OS 34 30 141 known.
  • This fuel injection pump has a stop lever which is adjustable as a function of the atmospheric pressure by means of an air pressure control element via a transmission device, on which a control lever of the fuel injection pump serving as a fuel quantity adjustment element comes into contact at full load.
  • the air pressure actuator consists of two diaphragm boxes connected in series, which change their length depending on the atmospheric pressure. This change in length is transmitted to the stop lever via the transmission device, which has two disks that can be coupled to one another.
  • a locking mechanism is assigned to the transmission device, which locks it against the force of the stop lever. The entire arrangement with the air pressure actuator and the transmission device and the locking mechanism thus consists of many individual parts and is complex to manufacture and assemble. Advantages of the invention
  • the fuel injection pump according to the invention with the characterizing features of claim 1 has the advantage that the stop lever can be adjusted as a function of atmospheric pressure with simple means.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a fuel injection pump as a longitudinal section.
  • a fuel injection pump of the distributor type has a pump piston 12 which operates in a cylinder bore 11 of a housing 10 and which, via a drive shaft 34, sets both a reciprocating and a rotating movement of a cam drive consisting of a roller ring 13 and a front cam disk 14 becomes.
  • a pump working space 15 formed by the pump piston 12 in the cylinder bore 11 is filled during the suction stroke of the pump piston 12 via a suction bore 16 and control grooves 17 in the pump piston 12 and during the pressure stroke of the pump piston 12 with a closed suction bore 16 via a longitudinal bore 18 and a distributor groove 19 connected to it.
  • the delivery end is reached when a transverse bore 23 of the pump piston 12 connected to the longitudinal bore 18 is opened by an axially displaceable control slide 24 and the pump work space is relieved to an interior 25.
  • the fuel supplied to the pump working chamber 15 via the suction bore 16 is taken from the interior 25 of the injection pump, which serves as the suction chamber, and into which the fuel which is controlled by the control slide 24 from the transverse bore 23 can flow back.
  • the interior 25 is supplied with fuel from a reservoir by a feed pump, not shown.
  • a fuel quantity adjustment device has a centrifugal weight speed controller 32, which is set in a rotational movement by the drive shaft 34 in a manner not shown in more detail and which actuates the control slide 24 via a control sleeve 35 and a control lever 36.
  • a control spring 39 also acts on the control lever 36 and is articulated on a speed adjustment lever 40 connected to the accelerator pedal.
  • the control lever 36 can be referred to as a fuel quantity adjusting element.
  • the axial position of the control slide 24 set by the control lever 36 determines the end of delivery and thus the injection quantity of the fuel injection pump. In the illustrated full load position of the regulator lever 36, this rests against a stop lever 41.
  • the stop lever 41 is designed with two arms and is rotatably mounted on a bolt 43.
  • An adjusting device has a working element 44 inserted into a sleeve 45 screwed into the housing 10, designed as an expansion element, which rests with one side of a collar 46 in the sleeve 45 and from which a pin 42 to the stop lever 41 through the sleeve 45 into the Interior 25 protrudes.
  • the Working element 44 is pressed towards the stop lever 41 by a spring 47, which is supported on a cover part 48 inserted into the sleeve 45 and which engages on the other side of the collar 46 on the working element 44.
  • the sleeve 45 and the cover part 48 are each fixed to the housing 10 and the sleeve 45 by means of a lock nut.
  • the position of the working element 44 can be adjusted by the sleeve 45.
  • the working element 44 is switched into an electrical circuit 52, which is closed or opened by a switching element 53 acted upon by the atmospheric pressure as a function of the atmospheric pressure.
  • the switching element 53 is designed as a height switch with a membrane socket 54, which closes a contact in the switching element 53 when expanded. If the atmospheric pressure at which the vehicle internal combustion engine supplied with the fuel injection pump is operated or otherwise changes falls below a value determined by the design of the diaphragm box 54, the diaphragm box 54 closes the circuit 52 and the working element 44 is heated. With increasing temperature, the working element 44 expands and, via its pin 42, rotates the stop lever 41 in the direction of decreasing fuel injection quantity.
  • the circuit 52 can also be designed, for example, as a pneumatic or hydraulic circuit.
  • Switching element 53 can also open or open a valve that is switched into circuit 52. close, whereby a working element 44 designed as a piston is adjusted depending on the pressure prevailing in the circuit 52.
  • an actuating magnet can be used as the working element, which is electrically controlled via the circuit.

Landscapes

  • 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)
  • Fuel-Injection Apparatus (AREA)

Abstract

Une pompe d'injection de carburant pour moteurs à combustion interne comprend un levier de réglage (36) qui sert à ajuster la quantité de carburant. En cas de pleine charge, le levier bute sur un bras d'un levier de butée (41) rotatif à deux bras. L'autre bras du levier de butée (41) s'appuie sur un élément de travail (44) électriquement chauffable dont la longueur se modifie en fonction de la température. L'élément de travail (44) est connecté à un circuit électrique (52) qui se ferme au moyen d'un interrupteur (53) actionné par la pression atmosphérique lorsque la pression atmosphérique tombe au-dessous d'une valeur déterminée. L'ajustement du levier de butée (41) obtenu au moyen de l'élément de travail est limité à une valeur prédéterminée par une contre-butée (49).A fuel injection pump for internal combustion engines includes an adjusting lever (36) which is used to adjust the amount of fuel. When fully loaded, the lever abuts on one arm of a two-arm rotary stop lever (41). The other arm of the stop lever (41) rests on an electrically heatable working element (44) the length of which changes as a function of temperature. The working element (44) is connected to an electrical circuit (52) which closes by means of a switch (53) actuated by atmospheric pressure when the atmospheric pressure falls below a determined value. The adjustment of the stop lever (41) obtained by means of the working element is limited to a predetermined value by a counter stop (49).

Description

Kraftstoffeinspritzpumpe für Brennkraftmaschinen Fuel injection pump for internal combustion engines
Stand der Technik State of the art
Die Erfindung geht aus von einer Kraftstoffeinspritzpumpe für Brennkraftmaschinen nach der Gattung des Anspruchs 1. The invention relates to a fuel injection pump for internal combustion engines according to the preamble of claim 1.
Eine solche Kraftstoffeinspritzpumpe ist bereits durch die Such a fuel injection pump is already through
DE-OS 34 30 141 bekannt. Diese Kraftstoffeinspritzpumpe weist einen in Abhängigkeit vom Atmosphärendruck durch ein Luftdruckstellglied über eine Ubertragungseinrichtung verstellbaren Anschlaghebel auf, an dem ein als Kraftstoffmengenverstellglied dienender Reglerhebel der Kraftstoffeinspritzpumpe bei Vollast zur Anlage kommt. Das Luftdruckstellglied besteht dabei aus zwei hintereinander geschalteten Membrandosen, die in Abhängigkeit vom Atmosphärendruck ihre Länge ändern. Diese Längenänderung wird über die Ubertragungseinrichtung, die zwei schleppbar miteinander gekoppelte Scheiben aufweist, auf den Anschlaghebel übertragen. Der Übertragungseinrichtung ist ein Gesperre zugeordnet, das diese entgegen der Krafteinwirkung des Anschlaghebels verriegelt. Die gesamte Anordnung mit dem Luftdruckstellglied und der Ubertragungseinrichtung sowie dem Gesperre besteht somit aus vielen Einzelteilen und ist aufwendig zu fertigen und zu montieren. Vorteile der Erfindung DE-OS 34 30 141 known. This fuel injection pump has a stop lever which is adjustable as a function of the atmospheric pressure by means of an air pressure control element via a transmission device, on which a control lever of the fuel injection pump serving as a fuel quantity adjustment element comes into contact at full load. The air pressure actuator consists of two diaphragm boxes connected in series, which change their length depending on the atmospheric pressure. This change in length is transmitted to the stop lever via the transmission device, which has two disks that can be coupled to one another. A locking mechanism is assigned to the transmission device, which locks it against the force of the stop lever. The entire arrangement with the air pressure actuator and the transmission device and the locking mechanism thus consists of many individual parts and is complex to manufacture and assemble. Advantages of the invention
Die erfinάungsgemäße Kraftstoffeinspritzpumpe mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, daß mit einfachen Mitteln der Anschlaghebel in Abhängigkeit vom Atmosphärendruck verstellbar ist. The fuel injection pump according to the invention with the characterizing features of claim 1 has the advantage that the stop lever can be adjusted as a function of atmospheric pressure with simple means.
In den ünteransprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der Kraftstoffeinspritzpumpe gekennzeichnet. Durch die Weiterbildung nach Anspruch 4 ist die Verstellung des Anschlaghebels auf einen vorgegebenen Wert begrenzt. Durch die im Anspruch 6 gekennzeichnete Abstützung des Arbeitselements kann dieses, wenn der Anschlaghebel am Gegenanschlag anliegt, sich zur Feder hin ausdehnen. Advantageous refinements and developments of the fuel injection pump are characterized in the subordinate claims. Through the development according to claim 4, the adjustment of the stop lever is limited to a predetermined value. Due to the support of the working element characterized in claim 6, when the stop lever rests against the counter stop, it can expand towards the spring.
Zeichnung drawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die Figur zeigt eine Kraftstoffeinspritzpumpe als Längsschnitt. An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The figure shows a fuel injection pump as a longitudinal section.
Beschreibung des Ausführungsbeispiels Description of the embodiment
Eine Kraftstoffeinspritzpumpe der Verteilerbauart weist einen in einer Zylinderbohrung 11 eines Gehäuses 10 arbeitenden Pumpenkolben 12 auf, der über eine Antriebswelle 34 von einem aus einem Rollenring 13 und einer Stirnnockenscheibe 14 bestehenden Nockentrieb sowohl in eine hin- und Vergehende als auch gleichzeitig in eine rotierende Bewegung versetfzt wird. Ein vom Pumpenkolben 12 in der Zylinderbohrung 11 gebildeter Pumpenarbeitsraum 15 wird beim Saughub des Pumpenkolbens 12 über eine Saugbohrung 16 und Steuernuten 17 im Pumpenkolben 12 gefüllt und beim Druckhub des Pumpenkolbens 12 bei abgeschlossener Saugbohrung 16 über eine Längsbohrung 18 und eine mit dieser verbundene Verteilernut 19, über ein Druckventil 21 und eine Druckleitung 22 zu einer nicht dargestellten Einspritzdüse an einem Zylinder der mit der Kraftstoffeinspritzpumpe betriebenen Brennkraftmaschine gefördert. Das Förderende wird erreicht, wenn eine mit der Längsbohrung 18 verbundene Querbohrung 23 des Pumpenkolbens 12 von einem axial verschiebbaren Regelschieber 24 aufgesteuert und der Pumpenarbeitsraum zu einem Innenraum 25 entlastet wird. Der über die Saugbohrung 16 dem Pumpenarbeitsraum 15 zugeführte Kraftstoff wird dem als Saugraum dienenden Innenraum 25 der Einspritzpumpe entnommen, in den auch der vom Regelschieber 24 aus der Querbohrung 23 abgesteuerte Kraftstoff zurückfließen kann. Dem Innenraum 25 wird von einer nicht dargestellten Förderpumpe Kraftstoff aus einem Vorratsbehälter zugeführt. A fuel injection pump of the distributor type has a pump piston 12 which operates in a cylinder bore 11 of a housing 10 and which, via a drive shaft 34, sets both a reciprocating and a rotating movement of a cam drive consisting of a roller ring 13 and a front cam disk 14 becomes. A pump working space 15 formed by the pump piston 12 in the cylinder bore 11 is filled during the suction stroke of the pump piston 12 via a suction bore 16 and control grooves 17 in the pump piston 12 and during the pressure stroke of the pump piston 12 with a closed suction bore 16 via a longitudinal bore 18 and a distributor groove 19 connected to it. via a pressure valve 21 and a Pressure line 22 is conveyed to an injection nozzle (not shown) on a cylinder of the internal combustion engine operated with the fuel injection pump. The delivery end is reached when a transverse bore 23 of the pump piston 12 connected to the longitudinal bore 18 is opened by an axially displaceable control slide 24 and the pump work space is relieved to an interior 25. The fuel supplied to the pump working chamber 15 via the suction bore 16 is taken from the interior 25 of the injection pump, which serves as the suction chamber, and into which the fuel which is controlled by the control slide 24 from the transverse bore 23 can flow back. The interior 25 is supplied with fuel from a reservoir by a feed pump, not shown.
Eine Kraftstoffmengenverstelleinrichtung weist einen Fliehgewicht- Drehzahlregler 32 auf, der in nicht näher dargestellter Weise von der Antriebswelle 34 in eine Drehbewegung versetzt wird und der über eine Reglermuffe 35 und einen Reglerhebel 36 den Regelschieber 24 betätigt. Auf den Reglerhebel 36 wirkt ferner eine Regelfeder 39, die an einem mit dem Gaspedal verbundenen Drehzahlverstellhebel 40 angelenkt ist. In dieser Funktion kann der Reglerhebel 36 als Kraftstoffmengenverstellglied bezeichnet werden. Die vom Reglerhebel 36 eingestellte axiale Lage des Regelschiebers 24 bestimmt das Förderende und damit die Einspritzmenge der Kraftstoffeinspritzpumpe. In der dargestellten Vollaststellung des Reglerhebels 36 liegt dieser an einem Anschlaghebel 41 an. A fuel quantity adjustment device has a centrifugal weight speed controller 32, which is set in a rotational movement by the drive shaft 34 in a manner not shown in more detail and which actuates the control slide 24 via a control sleeve 35 and a control lever 36. A control spring 39 also acts on the control lever 36 and is articulated on a speed adjustment lever 40 connected to the accelerator pedal. In this function, the control lever 36 can be referred to as a fuel quantity adjusting element. The axial position of the control slide 24 set by the control lever 36 determines the end of delivery and thus the injection quantity of the fuel injection pump. In the illustrated full load position of the regulator lever 36, this rests against a stop lever 41.
Der Anschlaghebel 41 ist zweiarmig ausgebildet und auf einem Bolzen 43 drehbar gelagert. Eine VerStelleinrichtung weist ein in eine in das Gehäuse 10 eingeschraubte Hülse 45 eingesetztes, als Dehnstoffgeber ausgeführtes Arbeitselement 44 auf, das mit einer Seite eines Bundes 46 in der Hülse 45 anliegt und von dem ein Stift 42 zum Anschlaghebel 41 hin durch die Hülse 45 in den Innenraum 25 ragt. Das Arbeitselement 44 wird durch eine Feder 47, die sich an einem in die Hülse 45 eingesetzten Deckelteil 48 abstützt und die auf der anderen Seite des Bundes 46 am Arbeitselement 44 angreift, zum Anschlaghebel 41 hin gedrückt. Die Hülse 45 sowie das Deckelteil 48 sind mittels je einer Kontermutter am Gehäuse 10 bzw. der Hülse 45 festgelegt. Durch die Hülse 45 ist eine Einstellung der Position des Arbeitselements 44 möglich. Auf der dem Stift 42 gegenüberliegenden Seite des Anschlaghebels 41 ist in das Gehäuse 10 eine als GegenanschlagThe stop lever 41 is designed with two arms and is rotatably mounted on a bolt 43. An adjusting device has a working element 44 inserted into a sleeve 45 screwed into the housing 10, designed as an expansion element, which rests with one side of a collar 46 in the sleeve 45 and from which a pin 42 to the stop lever 41 through the sleeve 45 into the Interior 25 protrudes. The Working element 44 is pressed towards the stop lever 41 by a spring 47, which is supported on a cover part 48 inserted into the sleeve 45 and which engages on the other side of the collar 46 on the working element 44. The sleeve 45 and the cover part 48 are each fixed to the housing 10 and the sleeve 45 by means of a lock nut. The position of the working element 44 can be adjusted by the sleeve 45. On the side of the stop lever 41 opposite the pin 42 there is a counter stop in the housing 10
49 dienende Schraube eingeschraubt, die mittels einer Kontermutter49 serving screw screwed in, using a lock nut
50 am Gehäuse 10 festgelegt ist. Das Arbeitselement 44 ist in einen elektrischen Schaltkreis 52 eingeschaltet, der durch ein vom Atmosphärendruck beaufschlagtes Schaltglied 53 in Abhängigkeit vom Atmosphärendruck geschlossen bzw. geöffnet wird. Das Schaltglied 53 ist als ein Höhenschalter mit einer Membrandose 54 ausgeführt, die bei Ausdehnung einen Kontakt im Schaltglied 53 schließt. Wenn der sich mit der Höhe, in der die mit der Kraftstoffeinspritzpumpe versorgte Fahrzeugbrennkraftmaschine betrieben wird, oder sich anderweitig ändernde Atmosphärendruck einen durch die Auslegung der Membrandose 54 bestimmten Wert unterschreitet, so schließt die Membrandose 54 den Schaltkreis 52 und das Arbeitselement 44 wird beheizt. Mit zunehmender Temperatur dehnt sich das Arbeitselement 44 aus und verdreht über seinen Stift 42 den Anschlaghebel 41 in Richtung abnehmender Kraftstoffeinspritzmenge. Um die Verdrehung des Anschlaghebels 41 zu begrenzen, kommt dieser nach einer bestimmten Verdrehung am Gegenanschlag 49 zur Anlage. Eine dann noch stattfindende weitere Ausdehnung des Arbeitselements 44 ist gegen die Feder 47 zum Deckelteil 48 hin möglich. Wenn das Schaltglied 53 infolge eines gestiegenen Atmosphärendrucks den Schaltkreis 52 wieder öffnet, so nimmt die Länge des Arbeitselements 44 infolge Abkühlung ab und der Anschlaghebel 41 wird in Richtung zunehmender Kraftstoffeinspritzmenge verstellt. 50 is fixed to the housing 10. The working element 44 is switched into an electrical circuit 52, which is closed or opened by a switching element 53 acted upon by the atmospheric pressure as a function of the atmospheric pressure. The switching element 53 is designed as a height switch with a membrane socket 54, which closes a contact in the switching element 53 when expanded. If the atmospheric pressure at which the vehicle internal combustion engine supplied with the fuel injection pump is operated or otherwise changes falls below a value determined by the design of the diaphragm box 54, the diaphragm box 54 closes the circuit 52 and the working element 44 is heated. With increasing temperature, the working element 44 expands and, via its pin 42, rotates the stop lever 41 in the direction of decreasing fuel injection quantity. In order to limit the rotation of the stop lever 41, it comes into contact with the counter stop 49 after a certain rotation. A further expansion of the working element 44 that is still taking place is possible against the spring 47 toward the cover part 48. When the switching element 53 opens the circuit 52 again due to an increased atmospheric pressure, the length of the working element 44 decreases as a result of cooling and the stop lever 41 is adjusted in the direction of increasing fuel injection quantity.
Der Schaltkreis 52 kann auch beispielsweise als ein pneumatischer oder hydraulischer Kreis ausgeführt sein. Es kann auch das Schaltglied 53 ein in den Kreis 52 eingeschaltetes Ventil öffnen bzw. schließen, wodurch ein als Kolben ausgeführtes Arbeitselement 44 in Abhängigkeit vom im Kreis 52 herrschenden Druck verstellt wird. Als Arbeitselement kann schließlich auch ein Stellmagnet verwendet werden, der über den Schaltkreis elektrisch angesteuert wird. The circuit 52 can also be designed, for example, as a pneumatic or hydraulic circuit. Switching element 53 can also open or open a valve that is switched into circuit 52. close, whereby a working element 44 designed as a piston is adjusted depending on the pressure prevailing in the circuit 52. Finally, an actuating magnet can be used as the working element, which is electrically controlled via the circuit.

Claims

Ansprüche Expectations
1. Kraftstoffeinspritzpumpe für Brennkraftmaschinen mit einem Kraftstoffmengenverstellglied (36) und einer diesem zugeordneten Verstelleinrichtung zur Veränderung des möglichen Weges des Kraftstoffmengenverstellglieds (36) in Abhängigkeit vom Atmosphärendruck, die einen drehbar gelagerten zweiarmigen Anschlaghebel (41) aufweist, an dem das Kraftstoffmengenverstellglied (36) zur Anlage bringbar ist, dadurch gekennzeichnet, daß die Versteileinrichtung ein vom Atmosphärendruck beaufschlagtes Schaltglied (53) aufweist, das in Abhängigkeit vom Atmosphärendruck einen Schaltkreis (52) schließt bzw. öffnet, in den ein auf den Anschlaghebel (41) wirkendes Arbeitselement (44) eingeschaltet ist, wobei das Arbeitselement nach Schließen bzw. Offnen des Schaltkreises (52) seine Lage oder seine Länge ändert. 1.Fuel injection pump for internal combustion engines with a fuel quantity adjustment element (36) and an adjustment device associated therewith for changing the possible path of the fuel quantity adjustment element (36) as a function of atmospheric pressure, which has a rotatably mounted two-armed stop lever (41) to which the fuel quantity adjustment element (36) System can be brought in, characterized in that the adjusting device has a switching element (53) acted upon by atmospheric pressure, which, depending on the atmospheric pressure, closes or opens a circuit (52) into which a working element (44) acting on the stop lever (41) is switched on is, the working element changes its position or its length after closing or opening the circuit (52).
2. Kraftstoffeinspritzpumpe nach Anspruch 1, dadurch gekennzeichnet, daß das Schaltglied (53) als ein elektrischer Schalter ausgebildet ist, daß der Schaltkreis (52) als ein elektrischer Schaltkreis ausgeführt ist und daß das Schaltglied (53) den Schaltkreis (52) bei Unterschreiten eines bestimmten Wertes des Atmosphärendrucks schließt. 2. Fuel injection pump according to claim 1, characterized in that the switching element (53) is designed as an electrical switch, that the circuit (52) is designed as an electrical circuit and that the switching element (53) falls below the circuit (52) certain value of atmospheric pressure.
3. Kraftstoffeinspritzpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Arbeitselement (44) elektrisch beheizbar ist und seine Länge temperaturabhängig ändert. 3. Fuel injection pump according to claim 1 or 2, characterized in that the working element (44) is electrically heated and its length changes depending on the temperature.
4. Kraftstoffeinspritzpumpe nach Anspruch 3, dadurch gekennzeichnet, daß das Arbeitselement (44) als ein Dehnstoffelement ausgebildet ist. 4. Fuel injection pump according to claim 3, characterized in that the working element (44) is designed as an expansion element.
5. Kraftstoffeinspritzpumpe nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß die durch das Arbeitselement (44) bewirkte Verstellung des Anschlaghebels (41) durch einen Gegenanschlag (49) begrenzt ist. 5. Fuel injection pump according to one of claims 1-4, characterized in that the adjustment of the stop lever (41) caused by the working element (44) is limited by a counter stop (49).
6. Kraftstoffeinspritzpumpe nach Anspruch 5, dadurch gekennzeichnet, daß der Gegenanschlag (49) verstellbar ist. 6. Fuel injection pump according to claim 5, characterized in that the counter-stop (49) is adjustable.
7. Kraftstoffeinspritzpumpe nach einem der Ansprüche 3 - 6, dadurch gekennzeichnet, daß sich das Arbeitselement (44) auf seiner dem Anschlaghebel (41) gegenüberliegenden Seite über eine Feder (47) abstützt. 7. Fuel injection pump according to one of claims 3-6, characterized in that the working element (44) is supported on its side opposite the stop lever (41) via a spring (47).
EP90906864A 1989-06-10 1990-05-15 Fuel injection pump for internal combustion engines Expired - Lifetime EP0475955B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3919064A DE3919064A1 (en) 1989-06-10 1989-06-10 FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE3919064 1989-06-10
PCT/DE1990/000353 WO1990015233A1 (en) 1989-06-10 1990-05-15 Fuel injection pump for internal combustion engines

Publications (2)

Publication Number Publication Date
EP0475955A1 true EP0475955A1 (en) 1992-03-25
EP0475955B1 EP0475955B1 (en) 1994-04-06

Family

ID=6382539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906864A Expired - Lifetime EP0475955B1 (en) 1989-06-10 1990-05-15 Fuel injection pump for internal combustion engines

Country Status (8)

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US (1) US5233957A (en)
EP (1) EP0475955B1 (en)
JP (1) JPH04505786A (en)
KR (1) KR0155562B1 (en)
BR (1) BR9007430A (en)
DE (2) DE3919064A1 (en)
ES (1) ES2052257T3 (en)
WO (1) WO1990015233A1 (en)

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FR1385894A (en) * 1964-03-06 1965-01-15 Maybach Motorenbau Gmbh Fuel flow limitation device for internal combustion engines
US3311102A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines
DE2731913A1 (en) * 1977-07-14 1979-02-01 Daimler Benz Ag IDLE ADJUSTMENT DEVICE FOR INJECTION PUMPS, IN PARTICULAR DIESEL INJECTION PUMPS
DE2854422A1 (en) * 1978-12-16 1980-07-03 Bosch Gmbh Robert FUEL INJECTION SYSTEM FOR DIESEL INTERNAL COMBUSTION ENGINES, ESPECIALLY FOR VEHICLE DIESEL ENGINES
JPS5773335U (en) * 1980-10-22 1982-05-06
JPS6128028Y2 (en) * 1981-05-14 1986-08-20
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JPS58133429A (en) * 1982-02-02 1983-08-09 Mazda Motor Corp Controller of fuel injection quantity in diesel engine
DE3243349A1 (en) * 1982-11-24 1984-05-24 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION PUMP
DE3322214A1 (en) * 1983-06-21 1985-01-10 Robert Bosch Gmbh, 7000 Stuttgart Injection pump for internal-combustion engines
DE3430141A1 (en) * 1984-08-16 1986-02-27 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION SYSTEM FOR DIESEL INTERNAL COMBUSTION ENGINES, ESPECIALLY FOR VEHICLE DIESEL ENGINES
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Title
See references of WO9015233A1 *

Also Published As

Publication number Publication date
EP0475955B1 (en) 1994-04-06
ES2052257T3 (en) 1994-07-01
DE3919064A1 (en) 1990-12-13
WO1990015233A1 (en) 1990-12-13
BR9007430A (en) 1992-06-16
JPH04505786A (en) 1992-10-08
DE59005284D1 (en) 1994-05-11
KR920701021A (en) 1992-08-10
US5233957A (en) 1993-08-10
KR0155562B1 (en) 1998-11-16

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