EP0355666B1 - Dispositif d'injection à correction du couple moteur pour moteurs à combustion interne - Google Patents

Dispositif d'injection à correction du couple moteur pour moteurs à combustion interne Download PDF

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Publication number
EP0355666B1
EP0355666B1 EP89115040A EP89115040A EP0355666B1 EP 0355666 B1 EP0355666 B1 EP 0355666B1 EP 89115040 A EP89115040 A EP 89115040A EP 89115040 A EP89115040 A EP 89115040A EP 0355666 B1 EP0355666 B1 EP 0355666B1
Authority
EP
European Patent Office
Prior art keywords
adjustment
injection device
screw
adjustment screw
torque control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89115040A
Other languages
German (de)
English (en)
Other versions
EP0355666A2 (fr
EP0355666A3 (en
Inventor
Werner Lemme
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0355666A2 publication Critical patent/EP0355666A2/fr
Publication of EP0355666A3 publication Critical patent/EP0355666A3/de
Application granted granted Critical
Publication of EP0355666B1 publication Critical patent/EP0355666B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • 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
    • 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
    • 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
    • F02D1/04—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 mechanical means dependent on engine speed, e.g. using centrifugal governors
    • F02D1/045—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 mechanical means dependent on engine speed, e.g. using centrifugal governors characterised by arrangement of springs or weights

Definitions

  • the invention relates to an injection device for internal combustion engines according to the preamble of patent claim 1.
  • An injection device for internal combustion engines in which an adjustment of the control rod in the sense of an increase in the amount of fuel delivered per pump stroke is effected when the engine speed decreases, is known from DE-AS 20 35 946.
  • the adjustment device described in the aforementioned prior publication is of complex construction overall and, in addition to a plurality of linkages with pivot and pivot points, has a plurality of control springs. It is particularly disadvantageous that an adjustment characteristic set by the interaction of linkage, articulation points and spring stiffness of the springs cannot be changed.
  • GB-A-2,141,808 describes an injection device for internal combustion engines, with at least one controller which has an adjustment of the injection quantity over the speed of the internal combustion engine, the full load amount, the start of adjustment and the adjustment amount being adjustable. This setting must be made at various points and also at least partially on a movable and encapsulated component.
  • the invention has for its object to provide an injection device for internal combustion engines, which can be used for different applications of internal combustion engines with associated different demands on the injection device and which is easy to adjust.
  • a first adjustment screw for the full load quantity, a second adjustment screw for the start of adjustment and a third adjustment screw for the adjustment amount are provided, which are arranged coaxially to one another, the first adjustment screw being designed as a hollow screw which engages around the second adjustment screw ,
  • the second adjusting screw is also designed as a hollow screw which surrounds the third adjusting screw, and that the adjusting screws are arranged penetrating the housing and are accessible on the outside thereof.
  • the injection device according to the invention for internal combustion engines of different series and to adjust the injection device according to the respective requirements of a series.
  • the start of the adjustment can be changed by the invention while the internal combustion engine is running and the adjustment amount can also be set while the internal combustion engine is running.
  • This is particularly advantageous in particular for large-scale production of an internal combustion engine, since the correspondingly produced internal combustion engines can all be manufactured and adjusted in the same way and only have to be adjusted to a specific adjustment characteristic when the attachment, for example, becomes known.
  • This also results in the possibility of being able to easily adjust the control characteristics of an internal combustion engine in the event of different requirements without the internal combustion engine having to be stopped or new parts even having to be used.
  • the controller has an adjustable full-load stop.
  • the adjustable full-load stop can be a useful addition to the adjustment quantity and the start of adjustment other important parameters of the injector can be influenced.
  • full load stop, start of adjustment and amount of adjustment can be influenced independently of each other using adjusting screws.
  • the individual parameters can thus be varied independently of one another.
  • Both the start of adjustment and the amount of adjustment can be set using a single service point.
  • all adjusting screws can be secured against unintentional turning. On the one hand, this is done so that the control characteristic of the injection device does not change unintentionally during operation of the internal combustion engine, on the other hand, unintended manipulation of the injection device can be prevented by unauthorized service personnel on the injection device if the adjusting screws are at least partially secured, for example, with a Kind of sealing wax is done.
  • the matching device 1 Only the part of the matching device 1 according to the invention is of the injection device of an internal combustion engine shown. An opening is machined into the housing 2 of the injection device or another part of the internal combustion engine in the case of individual injection devices and a central control rod 6, which has a cylindrical section 3 and then a threaded section 4 with a smaller diameter. In the interior of the injection device or the internal combustion engine, the control rod 6 or a transmission element connected to the control rod 6 is arranged in extension to the central axis 5 of the adjustment device 1.
  • the alignment device 1 essentially consists of three adjusting screws 7, 8 and 9 arranged coaxially to one another and a matching spring 10.
  • the external adjusting screw 7 for adjusting the full load stop is designed as a hollow screw and screwed into the threaded section 4 of the opening.
  • the adjusting screw 7 for the full-load stop has, in cooperation with the cylindrical section 3, an annular groove 11 into which a round cord ring 12 is inserted, which seals the adjusting screw 7 for the full-load stop against the housing 2.
  • the adjusting screw 7 has a slot 13 on the end face of the annular groove 11 (see also FIG. 2), into which a screwdriver provided with a correspondingly wide blade can be used to turn the adjusting screw 7.
  • the inner circumference of the adjusting screw 7 is in the region of the outer region interacting with the threaded section 4 with a cylindrical inner surface 16 provided, while the inner portion of the adjusting screw 7 lying axially parallel to the cylindrical portion 3 is provided with an internal thread 17.
  • a short hollow screw is screwed into the internal thread 17 and represents the adjusting screw 8 for changing the beginning of the adjustment.
  • the adjusting screw 8 for the start of the adjustment also has an outer slot 18 (FIG. 2) at its end facing the outside of the adjustment device 1, by means of which it can be turned. Inside, the adjusting screw 8 is in turn provided with a thread, into which the adjusting screw 9 is screwed for adjusting the adjustment amount.
  • the adjustment spring 10 is supported on the end face 19 of the adjusting screw 8 facing the control rod 6, which in turn is supported with its opposite end on a sliding piece 20.
  • the sliding piece 20 is axially displaceable on the cylindrical inner surface 16, the maximum displacement being determined by the snap ring 15 and the start of the internal thread 17, which forms a shoulder to the cylindrical inner surface 16.
  • the sliding piece 20 has an extension 21 which extends axially in the direction of the control rod 6.
  • the aforementioned maximum displacement path of the sliding piece 20 is - as previously mentioned - only formed by the internal thread 17 if the adjusting screw 9 for the adjustment amount is unscrewed accordingly far. Otherwise, the part of the extension 21 facing the adjusting screw 9 is supported on the adjusting screw 9 after the sliding piece 20 has been correspondingly displaced.
  • the adjusting screw 9 also has a slot 22 (see also FIG. 2).
  • the outer adjusting screw 7 for the full load stop is by means of a clamping claw 23, which does not have a closer screw connection 24 shown is connected to the housing 2, secured against unintentional rotation.
  • a cap 25 is inserted in front of the outer slot 18 and the slot 22 into the adjusting screw 7 which is designed as a hollow screw. This cap is secured against unauthorized removal by appropriate devices (sealing wax).
  • FIG. 3 shows a diagram in which the injection quantity is plotted against the speed of the internal combustion engine.
  • the controller characteristic is defined by the corner points A, B, C, D, E and F.
  • the range of the controller characteristic from C to D can essentially be influenced by the adjustment device 1 according to the invention.
  • the slope of section C-D (marked I) represents the adjustment amount, while the start of adjustment can be changed by moving point D in accordance with III.
  • the full load stop is adjusted by moving the corner points D and E according to II.
  • the forces acting on the control rod 6 are from a centrifugal force regulator, not shown, which acts on the control rod 6 in a suitable form in the same direction as the adjusting device 1, with a regulator spring which acts on the control rod on its opposite side, not shown , in balance.
  • a centrifugal force regulator which acts on the control rod 6 in a suitable form in the same direction as the adjusting device 1, with a regulator spring which acts on the control rod on its opposite side, not shown , in balance.
  • the force exerted by the governor on the control rod 6 becomes smaller, so that the adjustment spring 10 is compressed by the control spring, not shown, via the control rod 6 and the sliding piece 20, whereby the delivery rate is increased.
  • the pretension of the adjustment spring 10 is changed, whereby the balance of forces of the springs acting on the control rod 6 (centrifugal governor, control spring and adjustment spring) is changed, whereby point D is shifted according to III on the speed axis.
  • the adjusting spring 10 is compressed as the speed decreases further by the correspondingly smaller force exerted by the centrifugal force regulator on the control rod 6 until the sliding piece 20 abuts the adjusting screw 9. Point C is thus reached with the corresponding increase in the injection quantity corresponding to I.
  • the adjustment of the injection quantity can be adjusted by turning the adjusting screw 9.
  • the point of use of the adjustment device 1 is adjusted overall, so that the device only begins to function with correspondingly larger or smaller injection quantities corresponding to the control rod position 6.

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)

Claims (2)

  1. Dispositif d'injection pour moteurs à combustion interne, qui comporte au moins un mécanisme régulateur, qui lors d'une diminution du nombre de tours du moteur crée une compensation de l'organe de réglage (6) dans le sens d'une augmentation du débit de carburant envoyé à chaque course de la pompe, ce qu'on appelle une compensation en plus, dispositif dans lequel la dose à pleine charge et la dose de compensation sont ajustables et le début de la compensation peut être modifié en fonction de la vitesse de rotation du moteur,
    caractérisé :
    - en ce qu'on a prévu une première vis de réglage (7) pour la dose à pleine charge, une deuxième vis de réglage (8) pour le début de la compensation et une troisième vis de réglage (9) pour la dose de la compensation, vis qui sont disposées coaxiales l'une par rapport à l'autre, la première vis de réglage (7) est une vis creuse qui entoure la deuxième vis de réglage (8), la deuxième vis de réglage (8) est également une vis creuse, qui entoure la troisième vis de réglage (9), et
    - en ce que les vis de réglage (7, 8, 9) traversent le boîtier (2) et sont accessibles sur le côté extérieur de celui-ci.
  2. Dispositif d'injection selon la revendication 1,
    caractérisé :
    - en ce que les vis de réglage (7, 8, 9) sont bloquées contre une rotation éventuelle.
EP89115040A 1988-08-16 1989-08-16 Dispositif d'injection à correction du couple moteur pour moteurs à combustion interne Expired - Lifetime EP0355666B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3827734 1988-08-16
DE3827734A DE3827734A1 (de) 1988-08-16 1988-08-16 Einspritzvorrichtung fuer brennkraftmaschinen mit angleichung der einspritzmenge

Publications (3)

Publication Number Publication Date
EP0355666A2 EP0355666A2 (fr) 1990-02-28
EP0355666A3 EP0355666A3 (en) 1990-09-05
EP0355666B1 true EP0355666B1 (fr) 1994-04-13

Family

ID=6360931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115040A Expired - Lifetime EP0355666B1 (fr) 1988-08-16 1989-08-16 Dispositif d'injection à correction du couple moteur pour moteurs à combustion interne

Country Status (2)

Country Link
EP (1) EP0355666B1 (fr)
DE (2) DE3827734A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005034113B4 (de) * 2005-07-21 2013-04-25 Deutz Ag Verfahren zur Angleichung eines Regelorgans für eine Einspritzvorrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011223B (de) * 1954-05-14 1957-06-27 Bosch Gmbh Robert Fliehkraftdrehzahlregler fuer Einspritzbrennkraftmaschinen
AT295240B (de) * 1969-07-23 1971-12-27 Friedmann & Maier Ag Fliehgewichtsregler
GB1445842A (en) * 1972-12-29 1976-08-11 Cav Ltd Governors for fuel pumps
DE2308260C2 (de) * 1973-02-20 1983-11-24 Robert Bosch Gmbh, 7000 Stuttgart Fliehkraftdrehzahlregler für Einspritzbrennkraftmaschinen
DE2311044A1 (de) * 1973-03-06 1974-09-12 Bosch Gmbh Robert Fliehkraftdrehzahlregler fuer einspritzbrennkraftmaschinen
US4067303A (en) * 1974-12-19 1978-01-10 Diesel Kiki Co., Ltd. Fuel injection pump governor
DE2900198A1 (de) * 1979-01-04 1980-07-17 Bosch Gmbh Robert Fliehkraftdrehzahlregler fuer einspritzbrennkraftmaschinen, insbesondere leerlauf-enddrehzahlregler fuer fahrzeug-dieselmotoren
GB2119962B (en) * 1982-05-01 1985-08-29 Lucas Ind Plc Governor mechanism for a fuel pumping apparatus
DE3321714A1 (de) * 1983-06-16 1984-12-20 Robert Bosch Gmbh, 7000 Stuttgart Korrekturfederkapsel fuer einspritzeinrichtungen von brennkraftmaschinen

Also Published As

Publication number Publication date
EP0355666A2 (fr) 1990-02-28
EP0355666A3 (en) 1990-09-05
DE58907442D1 (de) 1994-05-19
DE3827734A1 (de) 1990-02-22

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