EP0027792B1 - Injection pump for internal-combustion engines with fuel injection, particularly for diesel engines - Google Patents

Injection pump for internal-combustion engines with fuel injection, particularly for diesel engines Download PDF

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Publication number
EP0027792B1
EP0027792B1 EP80890121A EP80890121A EP0027792B1 EP 0027792 B1 EP0027792 B1 EP 0027792B1 EP 80890121 A EP80890121 A EP 80890121A EP 80890121 A EP80890121 A EP 80890121A EP 0027792 B1 EP0027792 B1 EP 0027792B1
Authority
EP
European Patent Office
Prior art keywords
piston
pump
injection
control rod
injection pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80890121A
Other languages
German (de)
French (fr)
Other versions
EP0027792A1 (en
Inventor
Anton Dipl.-Ing. Dr. Pischinger
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.)
Voestalpine Metal Forming GmbH
Original Assignee
Friedmann and Maier AG
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 Friedmann and Maier AG filed Critical Friedmann and Maier AG
Publication of EP0027792A1 publication Critical patent/EP0027792A1/en
Application granted granted Critical
Publication of EP0027792B1 publication Critical patent/EP0027792B1/en
Expired 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F02M59/28—Mechanisms therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an injection pump for injection internal combustion engines, in particular diesel engines, of the type in which the injection pump and injection nozzle are combined to form a structural unit, each of which is associated with a motor cylinder, the pump piston of which is rotatable by a drive element for the purpose of changing the injection quantity, and counter to the effect the drive member is loaded by a return spring acting on the pump piston via a spring plate, the regulating member being formed by a crank rigidly connected to the piston or made in one piece therewith with a crank pin which is parallel to the piston axis and which is located at the drive end of the piston between the drive member and spring plate is arranged, wherein the control rod engages the crank pin.
  • control rod In a known injection pump of this type, the control rod is arranged inside the pump housing.
  • the installation of such a control rod brings with it considerable difficulties, in particular if several such units, each associated with a motor cylinder and formed by the injection pump and injection nozzle, are provided in a series engine. Adjustment of the regulation also appears difficult.
  • Arrangements are also known in which the control rod is arranged outside of the structural units formed by the injection pump and injection nozzle, the pump pistons of these structural units being rotated via a regulating sleeve which is acted upon by a short control rod which is led out of the pump housing and lies with the outside Control rod is coupled.
  • the object of the invention is now to simplify and to precisely regulate the delivery rate control in such structural units formed by the injection pump and injection nozzle.
  • the invention essentially consists in the fact that the crank pin protrudes from the front end of the housing of the injection pump in the area of the drive end of the pump piston and on a control rod which is arranged outside the unit formed by the injection pump and injection nozzle and which has an adjusting device in the area of the crank pin. attacks.
  • crank pin of the regulating member protrudes from the housing in the area of the drive end of the pump piston and that the outside control rod acts directly on this crank pin means that now only the play between the crank pin and control rod has to be taken into account and the overall play in the transmission of motion becomes thereby from the control rod to the injection pump piston reduced to a minimum.
  • the design is significantly simplified. Since the crank pin protrudes from the upper end of the injection pump housing, the control rod can be arranged in an easily accessible area. The control rod can be easily installed. The control rod has claws which are clamped to the control rod and act directly on the crank pin. The clamping device for these claws is also easily accessible and the various pump elements can therefore be set in a simple manner. The overall result is simple adjustment of the pump elements and great precision of the control.
  • the drawing shows an axial section through the housing of the injection pump.
  • 1 is the housing of the injection pump
  • 2 is the injection nozzle part
  • 3 is the pump piston sleeve
  • 4 is the pump piston
  • 5 is the return spring of the pump piston, which is supported against the upper spring plate 6 connected to the pump piston.
  • 7 is a plunger acting on the pump piston 4 with the interposition of a pressure piece 8.
  • a regulating member 10 is rigidly connected to the drive end 9 of the pump piston 4 and this regulating member 10 simultaneously forms the support for the spring plate 6.
  • the regulating member 10 is thus arranged between the upper spring plate 6 and the drive member of the pump piston 4 formed by the plunger 7.
  • the regulating member 10 is designed as a crank 11, which protrudes from the upper end of the housing 1 and on which a claw 12 engages, which is clamped on the regulating rod 13 by means of a screw 14. This arrangement is made possible in that the regulating member 10, 11 is arranged above the upper spring plate 6.

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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)
  • Details Of Reciprocating Pumps (AREA)

Description

Die Erfindung bezieht sich auf eine Einspritzpumpe für Einspritzbrennkraftmaschinen, insbesondere Dieselmotoren, von derjenigen Bauart, bei welcher Einspritzpumpe und Einspritzdüse zu einer jeweils einem Motorzylinder zugeordneten Baueinheit zusammengefasst sind, deren zwecks Veränderung der Einspritzmenge über ein Regulierglied drehbarer Pumpenkolben durch ein Antriebsglied angetrieben und entgegen der Wirkung des Antriebsgliedes durch eine über einen Federteller auf den Pumpenkolben wirkende Rückholfeder belastet ist, wobei das Regulierglied von einer mit dem Kolben starr verbundenen oder mit diesem in einem Stück gefertigten Kurbel mit parallel zur Kolbenachse stehendem Kurbelzapfen gebildet ist, welche am antriebsseitigen Ende des Kolbens zwischen Antriebsglied und Federteller angeordnet ist, wobei die Regelstange am Kurbelzapfen angreift. Bei einer bekannten Einspritzpumpe dieser Art ist die Regelstange innerhalb des Pumpengehäuses angeordnet. Die Montage einer solchen Regelstange bringt beträchtliche Schwierigkeiten mit sich, insbesondere wenn bei einem Reihenmotor mehrere solche jeweils einem Motorzylinder zugeordnete, von Einspritzpumpe und Einspritzdüse gebildete Baueinheiten vorgesehen sind. Auch eine Einstellung der Regelung erscheint schwierig. Es sind auch Anordnungen bekannt, bei welchen die Regelstange ausserhalb der von Einspritzpumpe und Einspritzdüse gebildeten Baueinheiten angeordnet ist, wobei die Pumpenkolben dieser Baueinheiten über eine Regulierhülse verdreht werden, an welcher eine kurze Regelstange angreift, die aus dem Pumpengehäuse herausgeführt ist und mit der aussen liegenden Regelstange gekuppelt ist. Bei solchen Anordnungen muss eine verhältnismässig komplizierte Bauart der Einspritzpumpe in Kauf genommen werden, da eine Regulierhülse und eine kurze in die Einspritzpumpe integrierte Regelstange vorgesehen sein muss. Die aussen liegende Regelstange greift bei diesen Ausbildungen an der kurzen in die Einspritzpumpe integrierten Regelstange an. Diese kurze Regelstange greift wieder an der Regulierhülse an und die Regulierhülse greift wieder an einem Querhaupt des Pumpenkolbens an, über welches der Pumpenkolben verdreht wird. Es sind somit drei Angriffsstellen vorhanden und an jeder dieser Angriffsstellen besteht ein Spiel. Wenn auch diese Spiele äusserst gering sind, so müssen sie doch addiert werden und in der Gesamtheit ergibt dies eine Verringerung der Präzision der Regelung.The invention relates to an injection pump for injection internal combustion engines, in particular diesel engines, of the type in which the injection pump and injection nozzle are combined to form a structural unit, each of which is associated with a motor cylinder, the pump piston of which is rotatable by a drive element for the purpose of changing the injection quantity, and counter to the effect the drive member is loaded by a return spring acting on the pump piston via a spring plate, the regulating member being formed by a crank rigidly connected to the piston or made in one piece therewith with a crank pin which is parallel to the piston axis and which is located at the drive end of the piston between the drive member and spring plate is arranged, wherein the control rod engages the crank pin. In a known injection pump of this type, the control rod is arranged inside the pump housing. The installation of such a control rod brings with it considerable difficulties, in particular if several such units, each associated with a motor cylinder and formed by the injection pump and injection nozzle, are provided in a series engine. Adjustment of the regulation also appears difficult. Arrangements are also known in which the control rod is arranged outside of the structural units formed by the injection pump and injection nozzle, the pump pistons of these structural units being rotated via a regulating sleeve which is acted upon by a short control rod which is led out of the pump housing and lies with the outside Control rod is coupled. In such arrangements, a relatively complicated design of the injection pump has to be accepted, since a regulating sleeve and a short control rod integrated in the injection pump must be provided. With these designs, the control rod on the outside engages the short control rod integrated in the injection pump. This short control rod engages the regulating sleeve again and the regulating sleeve engages again on a crosshead of the pump piston, via which the pump piston is rotated. There are therefore three attack points and there is a game at each of these attack points. Even if these games are extremely small, they still have to be added and overall this results in a reduction in the precision of the regulation.

Die Erfindung stellt sich nun zur Aufgabe, die Fördermengenregelung bei solchen von Einspritzpumpe und Einspritzdüse gebildeten Baueinheiten zu vereinfachen und präzise zu gestalten. Die Erfindung besteht hiebei im wesentlichen darin, dass der Kurbelzapfen im Bereich des Antriebsendes des Pumpenkolbens aus dem Stirnende des Gehäuses der Einspritzpumpe aus diesem herausragt und an einer ausserhalb der von Einspritzpumpe und Einspritzdüse gebildeten Baueinheit angeordneten Regelstange, die im Bereich des Kurbelzapfens eine Einstelleinrichtung aufweist, angreift. Dadurch, dass der Kurbelzapfen des Reguliergliedes im Bereich des Antriebsendes des Pumpenkolbens aus dem Gehäuse herausragt und dass die aussen liegende Regelstange unmittelbar an diesem Kurbelzapfen angreift, ist nun nur mehr das Spiel zwischen Kurbelzapfen und Regelstange zu berücksichtigen und es wird dadurch das Gesamtspiel in der Bewegungsübertragung von der Regelstange auf den Einspritzpumpenkolben auf ein Minimum reduziert. Darüber hinaus ergibt sich eine wesentliche Vereinfachung der Konstruktion. Da der Kurbelzapfen am oberen Ende des Gehäuses der Einspritzpumpe aus diesem herausragt, kann die Regelstange in einem leicht zugänglichen Bereich angeordnet werden. Die Montage der Regelstange ist leicht durchführbar. Die Regelstange weist Pratzen auf, welche an der Regelstange festgeklemmt sind und unmittelbar an dem Kurbelzapfen angreifen. Auch die Klemmvorrichtung für diese Pratzen ist leicht zugänglich und es können daher in einfacher Weise die verschiedenen Pumpenelemente eingestellt werden. In der Gesamtheit ergibt sich somit eine einfache Einstellung der Pumpenelemente und eine grosse Präzision der Regelung.The object of the invention is now to simplify and to precisely regulate the delivery rate control in such structural units formed by the injection pump and injection nozzle. The invention essentially consists in the fact that the crank pin protrudes from the front end of the housing of the injection pump in the area of the drive end of the pump piston and on a control rod which is arranged outside the unit formed by the injection pump and injection nozzle and which has an adjusting device in the area of the crank pin. attacks. The fact that the crank pin of the regulating member protrudes from the housing in the area of the drive end of the pump piston and that the outside control rod acts directly on this crank pin means that now only the play between the crank pin and control rod has to be taken into account and the overall play in the transmission of motion becomes thereby from the control rod to the injection pump piston reduced to a minimum. In addition, the design is significantly simplified. Since the crank pin protrudes from the upper end of the injection pump housing, the control rod can be arranged in an easily accessible area. The control rod can be easily installed. The control rod has claws which are clamped to the control rod and act directly on the crank pin. The clamping device for these claws is also easily accessible and the various pump elements can therefore be set in a simple manner. The overall result is simple adjustment of the pump elements and great precision of the control.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispieles schematisch erläutert.In the drawing, the invention is explained schematically using an exemplary embodiment.

Die Zeichnung zeigt einen Axialschnitt durch das Gehäuse der Einspritzpumpe.The drawing shows an axial section through the housing of the injection pump.

1 ist das Gehäuse der Einspritzpumpe, 2 ist der Einspritzdüsenteil, 3 ist die Pumpenkolbenbüchse, 4 ist der Pumpenkolben und 5 ist die Rückholfeder des Pumpenkolbens, welche gegen den mit dem Pumpenkolben verbundenen oberen Federteller 6 abgestützt ist. 7 ist ein auf den Pumpenkolben 4 unter Zwischenschaltung eines Druckstückes 8 wirkender Stössel.1 is the housing of the injection pump, 2 is the injection nozzle part, 3 is the pump piston sleeve, 4 is the pump piston and 5 is the return spring of the pump piston, which is supported against the upper spring plate 6 connected to the pump piston. 7 is a plunger acting on the pump piston 4 with the interposition of a pressure piece 8.

Mit dem antriebsseitigen Ende 9 des Pumpenkolbens 4 ist ein Regulierglied 10 starr verbunden und dieses Regulierglied 10 bildet gleichzeitig die Abstützung des Federtellers 6.A regulating member 10 is rigidly connected to the drive end 9 of the pump piston 4 and this regulating member 10 simultaneously forms the support for the spring plate 6.

Das Regulierglied 10 ist somit zwischen dem oberen Federteller 6 und dem von dem Stössel 7 gebildeten Antriebsglied des Pumpenkolbens 4 angeordnet. Das Regulierglied 10 ist als Kurbel 11 ausgebildet, welche aus dem oberen Ende des Gehäuses 1 herausragt und an welchem eine Pratze 12 angreift, welche auf der Regelstange 13 mittels einer Schraube 14 festgeklemmt ist. Diese Anordnung ist dadurch ermöglicht, dass das Regulierglied 10, 11 oberhalb des oberen Federtellers 6 angeordnet ist.The regulating member 10 is thus arranged between the upper spring plate 6 and the drive member of the pump piston 4 formed by the plunger 7. The regulating member 10 is designed as a crank 11, which protrudes from the upper end of the housing 1 and on which a claw 12 engages, which is clamped on the regulating rod 13 by means of a screw 14. This arrangement is made possible in that the regulating member 10, 11 is arranged above the upper spring plate 6.

Claims (1)

  1. Injection pump for internal-combustion engines with fuel injection, particularly for Diesel engines, of the type in which injection pump and injection nozzle are integrated to a constructional unit associated to one engine cylinder, having a pump piston (4) rotatable via a regulating member for adjusting the amount of fuel to be injected, driven by a piston drive member and biased against the action of said piston drive member by a return spring (5) acting on the pump piston (4) via a spring washer (6), the regulating member being formed of a crank having a crank pin (11) extending in parallel to the piston axis and being rigidly connected to the piston or manufactured for forming with the piston one single piece, said crank being arranged at the driven end of the piston between drive member and spring washer (6), the control rod (13) acting on the crank pin (11), characterized in that the crank pin (11) protrudes through the front end of the housing (1) of the injection pump at the area of the driven end of the pump piston (4) and engages the control rod (13) arranged outside of the constructional unit formed of injection pump and injection nozzle (2), said control rod (13) having adjusting means (14) at the area of the crank pin (11).
EP80890121A 1979-10-15 1980-10-14 Injection pump for internal-combustion engines with fuel injection, particularly for diesel engines Expired EP0027792B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0671679A AT364578B (en) 1979-10-15 1979-10-15 INJECTION PUMP FOR INJECTION COMBUSTION ENGINES, IN PARTICULAR DIESEL ENGINES
AT6716/79 1979-10-15

Publications (2)

Publication Number Publication Date
EP0027792A1 EP0027792A1 (en) 1981-04-29
EP0027792B1 true EP0027792B1 (en) 1983-04-06

Family

ID=3589071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80890121A Expired EP0027792B1 (en) 1979-10-15 1980-10-14 Injection pump for internal-combustion engines with fuel injection, particularly for diesel engines

Country Status (8)

Country Link
US (1) US4380222A (en)
EP (1) EP0027792B1 (en)
JP (1) JPS5696151A (en)
AT (1) AT364578B (en)
DE (1) DE3062640D1 (en)
ES (1) ES8202619A1 (en)
PL (1) PL124696B1 (en)
YU (1) YU263580A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5851056U (en) * 1981-10-03 1983-04-06 株式会社ボッシュオートモーティブ　システム unit injector
DE3539963A1 (en) * 1984-11-27 1986-06-05 Steyr-Daimler-Puch Ag, Wien DEVICE FOR COUPLING A SLIDING ACTUATOR ROD WITH A CONTROL UNIT, IN PARTICULAR WITH THE CONTROL ROD OF AN INJECTION UNIT OF AN INTERNAL COMBUSTION ENGINE
AT390125B (en) * 1984-11-27 1990-03-26 Steyr Daimler Puch Ag DEVICE FOR COUPLING A SLIDING ACTUATOR ROD WITH A CONTROL UNIT, IN PARTICULAR A CONTROL ROD OF AN INJECTION UNIT OF AN INTERNAL COMBUSTION ENGINE
DE3813320A1 (en) * 1988-04-08 1989-10-19 Voest Alpine Automotive PUMP NOZZLE FOR DIESEL ENGINES
CN113250878B (en) * 2021-06-18 2022-08-16 中国北方发动机研究所(天津) Control plunger part of common rail fuel injector

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967101A (en) * 1928-08-31 1934-07-17 Bosch Robert Fuel feed mechanism
US1746579A (en) * 1928-11-22 1930-02-11 George Mills Blackstone Injector-pump mechanism
DE587825C (en) * 1930-11-22 1933-11-10 Robert Bosch Akt Ges Rotary piston control for fuel injection pumps
DE697091C (en) * 1933-05-05 1940-10-05 Gen Motors Corp Fuel injection pump
US2053682A (en) * 1934-02-10 1936-09-08 Sulzer Ag Governing apparatus for internal combustion engines
GB548457A (en) * 1941-04-08 1942-10-12 George Lynex Stanley Improvements in or relating to fuel injection pumps
GB549210A (en) * 1941-05-07 1942-11-11 Cav Ltd Improvements relating to liquid-fuel injection pumps for internal combustion engines
DE761799C (en) * 1942-02-19 1954-03-01 Sulzer Ag Fuel injection pump for internal combustion engines
US3190561A (en) * 1962-06-28 1965-06-22 Bendix Corp Fuel injector
US3401569A (en) * 1966-03-21 1968-09-17 Eaton Yale & Towne Control linkage
US3566849A (en) * 1969-07-28 1971-03-02 Gen Motors Corp Fuel injector pump and limiting speed governor for internal combustion engine
US4036196A (en) * 1975-08-25 1977-07-19 Allis-Chalmers Corporation Spring loaded lever to operate control rack of fuel injector

Also Published As

Publication number Publication date
PL124696B1 (en) 1983-02-28
ATA671679A (en) 1981-03-15
US4380222A (en) 1983-04-19
EP0027792A1 (en) 1981-04-29
AT364578B (en) 1981-10-27
ES495917A0 (en) 1982-02-01
YU263580A (en) 1983-01-21
PL227288A1 (en) 1981-06-19
ES8202619A1 (en) 1982-02-01
JPS5696151A (en) 1981-08-04
DE3062640D1 (en) 1983-05-11

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