EP0328892B1 - Dispositif de réglage pour des pompes d'injection des moteurs diesels à correction du débit de combustible injecté en fonction de la pression de suralimentation - Google Patents

Dispositif de réglage pour des pompes d'injection des moteurs diesels à correction du débit de combustible injecté en fonction de la pression de suralimentation Download PDF

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Publication number
EP0328892B1
EP0328892B1 EP89100840A EP89100840A EP0328892B1 EP 0328892 B1 EP0328892 B1 EP 0328892B1 EP 89100840 A EP89100840 A EP 89100840A EP 89100840 A EP89100840 A EP 89100840A EP 0328892 B1 EP0328892 B1 EP 0328892B1
Authority
EP
European Patent Office
Prior art keywords
regulator
control device
regulator according
diaphragm
eccentric
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
EP89100840A
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German (de)
English (en)
Other versions
EP0328892A1 (fr
Inventor
Ernst-Siegfried Hartmann
Werner Lemme
Heinz-Wolfgang Fuchs
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
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Publication of EP0328892A1 publication Critical patent/EP0328892A1/fr
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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
    • 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
    • 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
    • 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 a control device for injection pumps of diesel internal combustion engines, which adjusts the injection quantity as a function of boost pressure, according to the preamble of claim 1.
  • the injection pump is matched to a delivery rate that is adapted to the increased air mass in the medium and high speed range.
  • these engines especially when used as vehicle engines, also run off in the low speed range, where the air filling is low depending on the condition of a naturally aspirated engine. In this naturally aspirated operating state, the amount of fuel has to be adjusted less in order to achieve complete and smoke-free combustion in the range mentioned.
  • a boost pressure-dependent control device fulfills this task by reducing the fuel quantity for the low speed range.
  • Such a control device is known from JP-A-59 120 774.
  • the full load stop of the control rod is adjusted depending on the boost pressure of the engine and an electromagnet.
  • the adjustment forces act on an adjustment rod, the adjustment movement of which is transmitted to a stop lever.
  • the stop lever is designed as an angle lever, one leg of which serves as a full-load stop for the control rod.
  • This arrangement is relatively simple and easy to maintain.
  • these advantages are paid for by the fact that there is a fixed association between the movement of the adjustment rod and the stop lever, which eliminates the possibility of influencing the adjustment characteristic of the full-load stop as a function of the boost pressure and thus of enabling a flexible adaptation of the loader and injection pump characteristics.
  • DE-A-32 46 869 also describes a control device in which the full-load stop of the control rod is adjusted as a function of the boost pressure.
  • adjustment springs are provided, which bring about an elastic coupling of the adjustment membrane to the full-load stop.
  • the course of the full load curve of the engine can be influenced at least partially as a function of the boost pressure.
  • the arrangement is complex and expensive and tends to inaccurate controls due to the many sliding elements.
  • the invention is based on the problem of equipping the injection system in a supercharged diesel engine with an adaptable control device which is accommodated in a simple and maintenance-friendly manner.
  • the control device is arranged so that this part is assembled together with the electromagnet necessary for the starting process in one unit, so that this device can also be retrofitted without great effort.
  • the structural unit is advantageously placed on the crankcase side to which the injection pump is also attached, so that the control device can act directly on the delivery quantity adjustment element of the injection pump via a compact transmission linkage system.
  • the control device is advantageously housed together with the electromagnet required for starting the machine so that the electromagnet also acts on the same rod system of the control device. The electromagnet is switched so that this during of the starting process overrides the control device and adjusts the injection pump to the desired additional injection start quantity.
  • An intermediate piece is installed in the transmission linkage system, which enables a non-linearity of the transmission ratio of the membrane movement on the control rod path. This enables adaptation to the smoke curves permitted by the engine under all operating conditions.
  • the intermediate piece is provided with a plurality of bores which are suitable for receiving a pin and, depending on where the pin is inserted, the transmission ratio on the delivery quantity adjusting element can be changed.
  • the intermediate piece can also be easily replaced, since it is only fastened by a pin in the housing of the control device and can be replaced at any time with a few simple steps.
  • the spring force counteracting the boost pressure on the diaphragm side is set to the point of use via an adjusting member, from which the adjusting eccentric acts.
  • the adjustment eccentric acts via a groove in the adjusting member, so that a forced adjustment can be achieved in both directions upwards and downwards.
  • the bias of the spring can be adjusted via an eccentric, which consists of a screw that is screwed into the housing and is also equipped with an eccentric pin attached to the other end, which engages in the groove of the guide bush that carries the spring.
  • an eccentric which consists of a screw that is screwed into the housing and is also equipped with an eccentric pin attached to the other end, which engages in the groove of the guide bush that carries the spring.
  • This practical and easy to accommodate version is suitable for relatively small changes in the spring preload, it must be noted that the eccentric pin always engages in the groove to move the guide bushing up or down. If relatively large adjustments of the spring preload are to be expected in both directions, then the screw is advantageously to be replaced by a cylindrical part which can be rotated as desired and can be locked in its end position with an externally attached clamping piece.
  • Figure 1 is a sketchy representation of an injection pump system with a governor and a Charge-pressure-dependent control device, which is accommodated in a housing together with the starting electromagnet, the two parts acting together on a linkage.
  • the combination of both parts is arranged on the engine crankcase so that it engages with the linkage system in the engine's control rod, which actuates the injection pump.
  • the injection quantity is adjusted according to the existing boost pressure at the different engine speeds.
  • the electromagnet is switched so that it overrides the boost pressure device during the starting process.
  • FIG. 2 shows an exemplary embodiment of the control device which enables the injection quantity to be controlled as a function of the boost pressure of the internal combustion engine.
  • the starting electromagnet 21 is shown on the right in the picture and, with its part protruding into the housing of the control device, acts on the angle lever 14 and actuates the control rod of the injection pump during the starting phase of the engine, as will be shown later.
  • a membrane 4 between two diaphragm plates 3 and 5, which is acted upon by the charge pressure of the diesel engine via a charge air line connection and lies tightly against the lower part of the room.
  • a piston 7 is attached, which moves up and down in a guide bush 6 and presses on an intermediate piece 8.
  • a compression spring 30 is located between the membrane and the guide bush brought, the bias is adjustable from the outside.
  • the intermediate piece 8 is pivotally mounted in the housing 1 on a pivot pin 11 and has a plurality of openings, in which a pin 10 can be listed which bears against the end part of the angle lever 14 under the pressure of the piston 7.
  • the stop part of the angle lever is tensioned against a spring 16.
  • Figure 3 shows a section A-A through Figure 2, wherein the eccentric adjusting device of the spring preload is shown.
  • a cylindrical part 28 is inserted with a seal 29 into the housing, where an eccentric pin 32 is attached at its end, which engages in a groove provided in the guide bush 6 and moves the guide bush axially upwards or downwards when the part 28 rotates.
  • the preload of the compression spring 30 can be changed by the movement and thus the start of action of the charger air pressure on the membrane 4 can also be changed.
  • FIG 4 the view of the engaging lever parts is shown, the end part of the angle lever 14 being designed in the form of a fork, so that the intermediate piece 8 can be accommodated in between and with the guided pin 10 on the fork parts under the action of the piston 7 presses.
  • the intermediate piece 8 is pivotally mounted in the housing 1 by a pin 11 and can be replaced in a few simple steps.
  • the intermediate piece 8 is provided with a plurality of bores for receiving the pin 10. This allows you to change the gear ratio change the charge air pressure on the diaphragm, and thus achieve better control or movement on the control rod of the injection pump according to the engine application.
  • the tab 18 is shown with a screw 17 screwed thereon, which holds the adjusting eccentric part after setting the desired bias of the spring 30 in its end position so that the eccentric part does not move back under the action of the compression spring.
  • the screw 17 can be loosened and the eccentric part rotated through the slot 18 'shown and then held in position in its end position with the clamping tab and with the screw tightened on it.
  • FIG. 6 shows the shaft 13, which is firmly connected to the angle lever 14 (FIG. 2) and transmits the angular movement of the angle lever to a pin 15.
  • the pin engages in the control rod 22 of the injection pump in a groove 9, so that the movement of the angle lever is transmitted to the pin 15, which in turn moves the control rod.
  • FIG. 7 shows a non-linear course of the control movement of the device according to the invention between a minimum and a maximum boost pressure.
  • the course of the corresponding smoke limit of the engine can be adjusted.
  • the position of the starting point at P 1min can be varied by changing the preload of the spring 30 be, whereby the responsiveness of the membrane to the effective boost pressure can be adjusted.
  • the position of the full-load stop of the angle lever 14 is determined by the position of the piston 7, which presses on the intermediate piece 8 and transmits the pressure force through the pin 10 to the angle lever and brings it into a specific full-load stop position.
  • the electromagnet comes into effect and overrides the effect of the control device.
  • the shaft 13 is moved by the angle lever 14 so far that the control rod of the injection pump is brought into a position where the maximum delivery rate for the start is set.
  • the membrane 4 moves downward against the force of the pressure adjusting spring 30 and pushes the piston 7 axially downward.
  • the piston presses on the intermediate piece 8, which swings about its axis and rotates the angle lever by means of the pin 10 attached therein.
  • the shaft 13 also rotates to the same extent and transmits the movement to the pin 15 attached to the end of the shaft 13 (FIG. 6).
  • the pin 15 engages directly in a groove 9 in the control rod of the injection pump, whereby the amount of fuel can be controlled depending on the charge air pressure of the engine. With the non-linear curve, the injection quantity at the smoke limit can be adjusted economically in the respective operating state.
  • the start of the movement phase of the pin 15 can be adjusted as desired by changing the bias of the spring 30.

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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)

Claims (7)

1. Dispositif de réglage pour des pompes d'injection de moteurs diesel, dispositif qui adapte, en fonction de la pression de suralimentation, le débit d'injection, avec une membrane (4) qui, par un de ses côtés, se trouve sous la pression de l'air de suralimentation, tandis que sur son autre côté, elle se trouve sous l'action d'un ressort de pression (30) susceptible d'être réglé par l'intermédiaire d'une douille de guidage (6), et qui influence, par l'intermédiaire d'un système de tringlerie, l'organe de réglage du débit refoulé par la pompe d'injection, dispositif de réglage caractérisé en ce que le moteur à combustion interne est équipé d'un électro-aimant de démarrage (21), le dispositif de réglage constituant, conjointement avec cet électro-aimant, une unité constitutive, qui est montée directement sur le carter de vilebrequin du moteur à combustion interne, tandis que le dispositif de réglage et l'électro-aimant agissent en commun par l'intermédiaire de ce même système de tringlerie, sur l'organe de réglage du débit refoulé par la pompe d'injection, le système de tringlerie comportant une pièce intermédiaire (8) qui transmet le déplacement de la membrane, selon un chemin incurvé, à l'organe de réglage du débit refoulé par la pompe d'injection, cependant que cette pièce intermédiaire (8) est montée en étant solidaire du boîtier à l'intérieur du dispositif de réglage, et comporte un certain nombre de perçages destinés à recevoir une broche (10), cette broche (10) transmettant le déplacement de la membrane à l'organe de réglage du débit de refoulement.
2. Dispositif de réglage selon la revendication 1, caractérisé en ce que l'électroaimant (21) surcommande le dispositif de réglage pendant le processus de démarrage.
3. Dispositif de réglage selon la revendication ou la revendication 2, caractérisé en ce que la pièce intermédiaire (8) est interchangeable.
4. Dispositif de réglage selon une des précédentes revendications, caractérisé en ce que la précontrainte du ressort de pression (30) est susceptible d'être réglée par l'intermédiaire d'une pièce d'excentrique (28) réglage de l'extérieur, comportant une broche excentrée rapportée à son extrémité.
5. Dispositif de réglage selon la revendication 4, caractérisé en ce que la broche excentrée de la pièce d'excentrique (28) déplace en direction axiale la douille de guidage (6) par l'intermédiaire d'une gorge à la périphérie de celle-ci.
6. Dispositif de réglage selon la revendication 4, caractérisé en ce que la pièce d'excentrique est constituée par une vis qui est vissée dans le boîtier.
7. Dispositif de réglage selon la revendication 4, caractérisé en ce que la pièce d'excentrique est constituée par une pièce cylindrique qui est introduite latéralement dans le boîtier avec un joint d'étanchéité (29) et qui est serrée de l'extérieur par un blocage en rotation.
EP89100840A 1988-02-18 1989-01-19 Dispositif de réglage pour des pompes d'injection des moteurs diesels à correction du débit de combustible injecté en fonction de la pression de suralimentation Expired - Lifetime EP0328892B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3804958 1988-02-18
DE3804958A DE3804958A1 (de) 1988-02-18 1988-02-18 Regeleinrichtung fuer einspritzpumpen von diesel-brennkraftmaschinen, welche die einspritzmenge ladedruckabhaengig anpasst

Publications (2)

Publication Number Publication Date
EP0328892A1 EP0328892A1 (fr) 1989-08-23
EP0328892B1 true EP0328892B1 (fr) 1991-05-08

Family

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Application Number Title Priority Date Filing Date
EP89100840A Expired - Lifetime EP0328892B1 (fr) 1988-02-18 1989-01-19 Dispositif de réglage pour des pompes d'injection des moteurs diesels à correction du débit de combustible injecté en fonction de la pression de suralimentation

Country Status (3)

Country Link
US (1) US4969436A (fr)
EP (1) EP0328892B1 (fr)
DE (2) DE3804958A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920553A1 (de) * 1989-06-23 1991-01-03 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer aufgeladene brennkraftmaschinen
DE3931603A1 (de) * 1989-09-22 1991-04-04 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE4321342A1 (de) * 1993-06-26 1995-01-05 Kloeckner Humboldt Deutz Ag Brennkraftmaschine mit einer Regeleinrichtung
DE4432635A1 (de) * 1994-09-14 1996-03-21 Bosch Gmbh Robert Brennstoffeinspritzvorrichtung für eine Zweitakt-Brennkraftmaschine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640259A (en) * 1948-10-29 1953-06-02 Anthony P Miller Electric shaver
US2767700A (en) * 1955-04-26 1956-10-23 Caterpillar Tractor Co Fuel control for supercharged engines
US3187734A (en) * 1961-09-22 1965-06-08 Thompson Ramo Wooldridge Inc Fuel injection system for engines
GB1239527A (fr) * 1968-07-30 1971-07-14
US3572304A (en) * 1968-09-27 1971-03-23 Bendix Corp Fuel injection pump
GB1328805A (en) * 1970-01-06 1973-09-05 Lucas Industries Ltd Fuel control apparatus for an engine fuel injection system
GB1371762A (en) * 1971-03-02 1974-10-23 Lucas Industries Ltd Control apparatus for an internal combustion engine fuel injection system
AT336345B (de) * 1975-01-02 1977-04-25 Friedmann & Maier Ag Regeleinrichtung fur einspritzpumpen
DE2837964A1 (de) * 1978-08-31 1980-03-20 Bosch Gmbh Robert Pneumatisches membranstellglied einer kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen
JPS57200621A (en) * 1981-06-05 1982-12-08 Diesel Kiki Co Ltd Fuel injection amount regulating device in fuel injection pump
AT385562B (de) * 1982-01-08 1988-04-25 Friedmann & Maier Ag Regler fuer die foerdermengenverstellung von einspritzpumpen einer einspritzbrennkraftmaschine
IT1157075B (it) * 1982-11-11 1987-02-11 Fiat Auto Spa Sistema di alimentazione per motori a ciclo diesel sovralimentati
JPS59120774A (ja) * 1982-12-27 1984-07-12 Hino Motors Ltd 燃料の供給制御装置
DE3416691A1 (de) * 1983-05-20 1984-11-22 Steyr-Daimler-Puch Ag, Wien Vorrichtung zur regelung der kraftstoff-einspritzmenge oder des einspritzbeginns bei dieselmotoren
US4640247A (en) * 1985-02-04 1987-02-03 Caterpillar Inc. Air-fuel ratio control system having a fluid-powered broken-link mechanism

Also Published As

Publication number Publication date
DE3804958A1 (de) 1989-08-31
EP0328892A1 (fr) 1989-08-23
US4969436A (en) 1990-11-13
DE58900103D1 (de) 1991-06-13

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