EP0069111B1 - Dispositif de réglage pour commander l'instant d'injection et/ou le débit d'une pompe d'injection de combustible pour moteurs à combustion interne - Google Patents

Dispositif de réglage pour commander l'instant d'injection et/ou le débit d'une pompe d'injection de combustible pour moteurs à combustion interne Download PDF

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Publication number
EP0069111B1
EP0069111B1 EP82890086A EP82890086A EP0069111B1 EP 0069111 B1 EP0069111 B1 EP 0069111B1 EP 82890086 A EP82890086 A EP 82890086A EP 82890086 A EP82890086 A EP 82890086A EP 0069111 B1 EP0069111 B1 EP 0069111B1
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EP
European Patent Office
Prior art keywords
spring
control system
shut
collars
fuel
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
EP82890086A
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German (de)
English (en)
Other versions
EP0069111A1 (fr
Inventor
Theodor Dipl.-Ing. Dr. Stipek
Peter Dipl. Ing. Dr. Herzog
Gerhard Dipl.-Ing. Dr. Lehner
Heinz Rathmayr
Georg Dipl.-Ing. Brasseur
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.)
Friedmann and Maier AG
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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.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3536932&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0069111(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Friedmann and Maier AG filed Critical Friedmann and Maier AG
Publication of EP0069111A1 publication Critical patent/EP0069111A1/fr
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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
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/022—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by acting on fuel control mechanism

Definitions

  • the invention relates to a control device for the adjustment of the injection timing and / or the delivery rate of a fuel injection pump for internal combustion engines, in which a start of delivery and / or delivery quantity adjustment member, in particular a stop for the supporting piston rod and / or a control rod, of an electric servomotor is adjusted with the interposition of at least one mechanical energy accumulator designed as a spring accumulator.
  • the invention now relates to a control device of the type mentioned in the introduction, in which an electric servomotor, in particular a stepper motor, is used for the adjustment of a linkage.
  • electric servomotors are usually dimensioned so that their maximum actuating force is not sufficient to damage the control linkage.
  • a microprocessor is usually used to control the motor and it is essential for the exact control of the injection timing or the delivery rate of a fuel injection pump that the actual position of the servomotor with that of the microprocessor for the next positioning step.
  • One step or some steps of the electric servomotor can be temporarily taken up from the mechanical energy accumulator provided in accordance with the prerequisites if the adjustment would only be possible with increased effort and wear, as is the case at the time of the delivery process of the injection pump.
  • the adjusting steps of the electric servomotor, in particular of the stepping motor, stored in the mechanical energy store are passed on to the adjusting elements of the fuel injection pump, so that the required target position is assumed while keeping the actuators as little wear as possible. This measure also prevents individual adjustment steps from being hindered to such an extent that subsequent precise regulation would be impaired.
  • the invention aims to provide a control device of the type specified in the introduction, the spring accumulator of which has a simple and space-saving design and high operational reliability.
  • the invention consists essentially in the fact that the spring accumulator has two mutually movable spring plates, the maximum distance from each other is limited by stops of a housing spanning the spring plates, a preloaded compression spring being accommodated between the spring plates, that a servo motor designed as a stepper motor is in tension and pressure non-positively connected part of a transmission linkage passes through both spring plates and carries stops which cooperate with the sides of the spring plate facing away from the compression spring, and that the part of the transmission linkage connected to the adjusting member is connected to the housing.
  • Such a part of a transmission linkage that is non-positively connected to tension and pressure can be formed, for example, by a toothed rack meshing with a pinion of the electric servomotor or also as a nut rotating around a spindle, which is rotationally connected to the drive motor.
  • This training ensures storage of the adjustment steps in both directions of actuation of the adjusting elements. in the If the power transmission from the servomotor to the adjusting element is designed with a spiral-shaped backdrop, a simple, spring-compressible energy store is sufficient.
  • the spring plates can have stops on their mutually facing sides, which limit the maximum pressure stroke of the spring, so that an adjustment which suddenly becomes necessary and exceeds this maximum pressure stroke is nevertheless carried out regardless of the associated wear of the adjusting elements, in order to prevent impermissible operating states of the Avoid internal combustion engine.
  • an energy store in the transmission path between the electric servomotor, in particular the stepper motor, and the adjusting member also enables safety measures to be taken in a simple manner in the event of a power failure or the microprocessor's failure.
  • the design is preferably such that at least one stop is provided in the transmission linkage between the energy store and the adjusting member, which stop can be coupled to a stop device that is independent of the stepper motor, and that at least one further resilient towing member is switched on between this stop and the force store is.
  • the parking device is preferably designed as a piston of a hydraulic cylinder-piston unit which can be displaced counter to the force of a spring and whose working space can be acted upon by a hydraulic medium, the spring force of the parking device being greater than the spring force of the resilient drag member or the energy accumulator.
  • the use of such a hydraulic cylinder-piston unit is particularly recommended because the spring force of this shut-off device must be relatively large in order to ensure a quick and safe shutdown in the event of a power failure, failure of the microprocessor or failure of the servomotor.
  • a preferably electrically operable valve is preferably switched on in the hydraulic line to the working space of the parking device, which connects the hydraulic cylinder to a pressure medium source during operation of the internal combustion engine and in the case of impermissible operating states, such as, for. B. overspeed and / or power failure, the hydraulic cylinder is depressurized.
  • FIG. 1 shows a first embodiment of an energy accumulator according to the invention and FIG. 2 shows the embodiment according to FIG. 1, but a shutdown device is additionally provided.
  • Fig. 1, 1 shows the pump-nozzle assembly for supplying fuel to an internal combustion engine (not shown), in which the control of the fuel quantity and the control of the start of delivery are each effected by an adjusting member 2, 3 which is arranged in the pump housing and is designed as a push rod and which is actuated via a linkage is shifted that is driven by an electric servomotor 4, for example, via a gear / rack and pinion 5, 6, 7, 8 or via a spiral backdrop, not shown.
  • the control of the two servomotors takes place via a microprocessor, not shown, which calculates the setpoints for quantity and start of delivery from the operating parameters of the motor determined by sensors and transmits the necessary control impulses to the servomotors via amplifiers.
  • an energy accumulator 9, 10 is installed as a working storage unit, which has the task of giving in via a limited path when the actuating force in the linkage is reached and storing the path additionally controlled by the servomotor 4.
  • this is done by the compression spring 11, which presses the two spring plates 12, 13 against the stops 14, 15 in the force accumulator 9 designed as a spring sleeve.
  • a game 16 is provided between the two spring plates 12, 13 in the rest position.
  • the part 17 of the transmission linkage which is non-positively connected to the electric servo under tension and pressure passes through the spring plates 12, 13 and has a fixed 18 and an adjustable stop 19, the latter being set such that no play of the two spring plates 12 in the rest position , 13 to the stops 18, 19 occurs. If, during the delivery phase, the control rods are held in the pump and the servomotors control a movement at the same time, this movement leads to a compression of the compression spring 11 in the spring bushing within the scope of the game 16.
  • the spring 11 is expediently designed in its pretensioning force in such a way that this is approximately 30 to 50% of the force exerted by the servomotor.
  • the dependence of the displacement force on the spring travel should be small, so that the increase in force when passing through the game 16 is small. From the arrangement in Fig. 1 it can be seen that the memory effect described occurs in both directions of movement of the control rod.
  • FIG. 2 shows an arrangement similar to FIG. 1.
  • a further resilient towing element 20 is installed in the control linkage for the quantity control, as well as a stop 21, which cooperate with a parking device 22.
  • a shut-off device which contains a piston 23, a piston rod 24 and a hook-shaped coupling part 25, is acted upon via a line by a liquid pressure - for example the engine oil pressure or fuel pressure, where is tensioned by the spring 26 and the piston 23 is pressed with the coupling part 25 into its left end position, in which it does not hinder the movement of the delivery rate adjustment member 2.
  • a liquid pressure for example the engine oil pressure or fuel pressure
  • the spring 26 presses the piston 23 together with the hook-shaped coupling part to the right, and the control rod is pulled in the direction of zero delivery via the stop 21.
  • the biasing force of the compression spring 29 is overcome in the resilient towing member 20 and the spring 29 is compressed in accordance with the required stopping distance.
  • the compression spring 11 in the spring sleeve 9 is compressed in this emergency shutdown until the game 16 is overcome.
  • the biasing force of the spring 29 in the resilient towing member 20 is approximately 60 to 90%, the force exerted by the spring 26 of the parking device 22 is at least 110%.

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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (6)

1. Dispositif de commande pour le réglage de l'instant d'injection et/ou du débit de refoulement d'une pompe d'injection de carburant pour moteurs à combustion interne, dans lequel un organe de réglage du début de refoulement et/ou du débit de refoulement (2, 3), en particulier une tige qui porte des butées pour des pistons alternatifs et/ou une tige de réglage, est déplacé par un moteur électrique de positionnement (4) avec interposition d'au moins un accumulateur d'énergie mécanique (9, 10), réalisé sous forme d'accumulateur à ressort, caractérisé en ce que l'accumulateur à ressort comporte deux coupelles de ressort (12, 13) mobiles l'une par rapport à l'autre, dont la distance mutuelle maximale est limitée par des butées (14, 15) d'un carter qui recouvre les coupelles de ressort, un ressort de pression précontraint (11) étant logé entre les coupelles de ressort, en ce qu'une partie (17) d'une tringlerie de transmission, raccordée par adhérence à la traction et à la pression au moteur de positionnement réalisé sous forme de moteur pas-à-pas (4), traverse les deux coupelles de ressort (12, 13) et porte des butées (18, 19) qui coopèrent avec les faces des coupelles de ressort (12, 13) opposées au ressort de pression (11), et en ce que la partie de la tringlerie de transmission reliée à l'organe de réglage (2, 3) est raccordée au carter.
2. Dispositif de commande selon la revendication 1, caractérisé en ce que les coupelles de ressort (12, 13) présentent, sur leurs côtés dirigés l'un vers l'autre, des butées qui limitent la course de compression maximale (16) du ressort (11).
3. Dispositif de commande selon la revendication 1 ou 2, caractérisé en ce qu'il est prévu dans la tringlerie de transmission, entre l'accumulateur d'énergie (9, 10) et l'organe de réglage (2, 3), au moins une butée (21) qui peut être accouplée avec un dispositif d'arrêt indépendant du moteur pas-à-pas (4), et en ce qu'il est interposé, entre cette butée (21) et l'accumulateur d'énergie (9, 10), au moins un autre organe glissant à ressort (20, 29).
4. Dispositif de commande selon la revendication 3, caractérisé en ce que le dispositif d'arrêt (22) est réalisé sous forme de piston (23), mobile contre la force d'un ressort (26), d'un ensemble cylindre-piston hydraulique dont la chambre de travail peut recevoir un fluide hydraulique, la force de ressort du dispositif d'arrêt étant plus grande que la force de ressort de l'organe glissant à ressort (20, 29) ou de l'accumulateur d'énergie (9).
5. Dispositif de commande selon la revendication 4, caractérisé en ce qu'il est intercalé, dans la conduite hydraulique aboutissant à la chambre de travail du dispositif d'arrêt (22), une soupape (27), de préférence commandée électriquement, qui relie le cylindre hydraulique à une source de fluide sous pression lorsque le moteur à combustion interne tourne et qui met hors pression le cylindre hydraulique en cas de conditions inacceptables de fonctionnement, par exemple en cas de survitesse et/ou de panne de courant.
6. Dispositif de commande selon l'une quelconque des revendications 3 à 5, caractérisé en ce que la butée (21) qui coopère avec le dispositif d'arrêt (22) est simplement disposée dans la partie de la tringlerie de transmission qui est raccordée à l'organe de réglage (2) contrôlant le débit de refoulement.
EP82890086A 1981-06-10 1982-06-08 Dispositif de réglage pour commander l'instant d'injection et/ou le débit d'une pompe d'injection de combustible pour moteurs à combustion interne Expired EP0069111B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2585/81 1981-06-10
AT258581 1981-06-10

Publications (2)

Publication Number Publication Date
EP0069111A1 EP0069111A1 (fr) 1983-01-05
EP0069111B1 true EP0069111B1 (fr) 1984-08-15

Family

ID=3536932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890086A Expired EP0069111B1 (fr) 1981-06-10 1982-06-08 Dispositif de réglage pour commander l'instant d'injection et/ou le débit d'une pompe d'injection de combustible pour moteurs à combustion interne

Country Status (4)

Country Link
US (1) US4432320A (fr)
EP (1) EP0069111B1 (fr)
JP (1) JPS5838333A (fr)
DE (1) DE3260578D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416691A1 (de) * 1983-05-20 1984-11-22 Steyr-Daimler-Puch Ag, Wien Vorrichtung zur regelung der kraftstoff-einspritzmenge oder des einspritzbeginns bei dieselmotoren
AT389351B (de) * 1984-03-29 1989-11-27 Steyr Daimler Puch Ag Vorrichtung zur regelung der kraftstoff-einspritzmenge oder des einspritzbeginns bei dieselmotoren
US4850321A (en) * 1986-03-26 1989-07-25 Ail Corporation Preloaded compliant linkage for fuel injection pump rack
EP0239523B1 (fr) * 1986-03-26 1990-06-06 Ail Corporation Tringlerie flexible précontrainte pour la tige de réglage d'une pompe d'injection de combustible
DE3713288A1 (de) * 1986-07-25 1988-02-04 Man Nutzfahrzeuge Gmbh Steuereinrichtung fuer die verstellung des einspritzzeitpunktes und/oder der foerdermenge einer kraftstoffeinspritzpumpe
DE4421087A1 (de) * 1994-06-16 1995-12-21 Kloeckner Humboldt Deutz Ag Verfahren und Vorrichtung zum Montieren eines Einspritzpumpenelementes
DE4446905C2 (de) * 1994-12-27 1996-12-05 Anton Dipl Ing Dolenc Einspritzpumpeneinheit und Verfahren zu deren Einstellung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT409568A (fr) *
US1967101A (en) * 1928-08-31 1934-07-17 Bosch Robert Fuel feed mechanism
US2125210A (en) * 1935-08-13 1938-07-26 Automotive Prod Co Ltd Governing means for injection pumps
DE886828C (de) * 1948-08-26 1953-08-17 Fell Developments Ltd Kraftanlage mit Hauptmaschinen mit Kompressionszuendung
DE1264142B (de) * 1966-05-20 1968-03-21 Bosch Gmbh Robert Dieselmotor mit einem Stellglied zum Einstellen der Kraftstoffmenge und einem Verstellregler
JPS5271403A (en) * 1975-12-09 1977-06-14 Chiyoda Chem Eng & Constr Co Ltd Removal of meals in hydrocarbons
DE2758324C2 (de) * 1977-12-27 1986-11-13 Robert Bosch Gmbh, 7000 Stuttgart Mengenregler für die einzuspritzende Kraftstoffmenge bei einer Brennkraftmaschine mit Selbstzündung
DE2821161C2 (de) * 1978-05-13 1983-08-04 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Geteilte Regelstange für eine Kraftstoffeinspritzpumpe
DE2908235C2 (de) * 1979-03-02 1986-04-17 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Vorrichtung an einer Einspritzpumpe mit einer Regelstange zur Einstellung der Fördermenge von Brennstoff für den Betrieb einer Brennkraftmaschine
GB2029512B (en) * 1979-08-30 1983-03-02 Bosch Gmbh Robert A control device for fuel injection pump

Also Published As

Publication number Publication date
JPS5838333A (ja) 1983-03-05
DE3260578D1 (en) 1984-09-20
EP0069111A1 (fr) 1983-01-05
US4432320A (en) 1984-02-21

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