EP0522359B1 - Pompe d'injection de carburant pour moteurs à combustion interne - Google Patents

Pompe d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
EP0522359B1
EP0522359B1 EP92110718A EP92110718A EP0522359B1 EP 0522359 B1 EP0522359 B1 EP 0522359B1 EP 92110718 A EP92110718 A EP 92110718A EP 92110718 A EP92110718 A EP 92110718A EP 0522359 B1 EP0522359 B1 EP 0522359B1
Authority
EP
European Patent Office
Prior art keywords
lever
fuel injection
spring
stop
drag
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
EP92110718A
Other languages
German (de)
English (en)
Other versions
EP0522359A1 (fr
Inventor
Karl Konrath
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 EP0522359A1 publication Critical patent/EP0522359A1/fr
Application granted granted Critical
Publication of EP0522359B1 publication Critical patent/EP0522359B1/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • 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
    • 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
    • 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
    • F02M59/38—Pumps characterised by adaptations to special uses or conditions
    • 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

Definitions

  • the invention is based on a fuel injection pump with an adjusting device according to the preamble of claim 1.
  • a full-load stop for a quantity adjustment element of a fuel injection pump is set by a stepper motor and the quantity adjustment element is actuated by a centrifugal force regulator usually present on the fuel injection pump in connection with a load lever.
  • the stepper motor acts directly on the stop lever, which may have to be adjusted against the force of a control spring.
  • An adjustment device has also already been proposed which, in addition to the maximum injection quantity at full load and the starting injection quantity, also regulates the idle injection quantity as a function of operating parameters of the internal combustion engine via a stepper motor. If the stepper motor fails during the adjustment control in idle mode, it is no longer possible to increase the injection quantity for driving operation and the internal combustion engine can practically no longer be used.
  • the fuel injection pump according to the invention with the characterizing features of claim 1 has the advantage over the prior art that it can continue to be operated even after a failure of the stepping motor. It is thus possible, even after the stepping motor has failed, to maintain the actuability of the control lever and to continue to operate the fuel injection pump, thus ensuring that the internal combustion engine runs smoothly. Further advantages and advantageous configurations can be found in the drawings and the description.
  • FIG. 1 shows a simplified illustration of a fuel injection pump of an internal combustion engine, with a stop lever for the regulator lever according to the prior art, which can be adjusted by a stepper motor, which explains the position and function of the double finger lever according to the invention
  • FIG. 2 in section A of FIG. 1 is a perspective illustration further developed according to the invention, the adjustable stop receiving lever with the adjacent force-transmitting components.
  • the fuel quantity adjustment device shown in FIG. 1 shows the structure of a known fuel injection pump for internal combustion engines. The structure and function are therefore only explained to the extent that they serve to understand the subject matter of the invention.
  • a ring slide 2 on a pump piston 1 forming a pump working space in the high pressure part, not shown arranged, which opens a relief channel 3 of the pump work chamber on the pump piston 1 via its axial movement.
  • the ring slide 2 is connected to a control lever 10, which is adjustable by a speed-dependent force 5 against the force of a control spring 6.
  • the speed-dependent force is transmitted via a centrifugal force actuator 5, which operates synchronously with the pump speed, to the control lever, which is designed as a two-armed starter lever 10, which is rotatably mounted in a shaft 23 fixed to the housing and engages with its lever arm facing away from the centrifugal force actuator 5 in a recess 24 of the ring slide 5.
  • a single-armed tensioning lever 9 can also be pivoted about the same axis 23 fixed to the housing, on which the control spring 6 engages and a starting spring 11 and an idling spring 12 are arranged between the and the starting lever 10. After an idling speed has been exceeded, the starting lever 10 comes into contact with the tensioning lever 9 against the force of the starting spring 11 and the idling spring 12.
  • the idling spring 12 guides the idling spring 12 via a pin 25 arranged within a crank 26.
  • the control spring engages on the tensioning lever 9 via a bolt 27 6, which preferably consists of a prestressed compression spring and on the other hand is articulated on an adjusting lever 7.
  • a two-armed stop lever 13 which is rotatable about an axis 16 fixed to the housing and limits the swiveling movement of the tensioning lever 9 and which can be adjusted from a stepper motor 8 via an actuator 17 to a stop 28 fixed to the housing and a stop for the tensioning lever 9 forms.
  • the stepping motor 8 and the stop lever 13 limit the adjustment path of the tensioning lever 9 and thus the amount of fuel injection when the type lever 10 is in contact with the tensioning lever 9, depending on the operating state of the internal combustion engine.
  • FIG. 2 shows the detailed view of the stop lever arrangement according to the invention. It consists of a first rocker arm 18 and a second rocker arm 19, both of which are mounted on the axle 16 and between which a single-armed center lever 14, which can be pivoted by the actuator 17 of the stepping motor 8, is arranged on the axle.
  • the first rocker arm 18 is a two-armed lever, one lever arm 31 serving as a stop for the tensioning lever 9 and the other lever arm 20 on one, which is supported on the first rocker arm 18 by a torsion spring 21 in contact with an arranged parallel to the axis 16, with the Center lever 14 connected, driving part 15 is held.
  • One lever arm 20 rests on the side of the driving part 15 facing the actuator 17 and the torsion spring 21 on the opposite side.
  • the second rocker arm 19 is a three-armed lever and, like the first rocker arm, has a lever arm 32 as a stop for the tensioning lever 9 and another lever arm 33 lying opposite this arm, between which and a second torsion spring 22 the other end of the driving part 15 is clamped .
  • a third lever arm 35 is also designed as a stop on an adjustable stop screw 34 fixed to the housing.
  • the actuator 17 of the stepping motor 8 engages on the lever arm of the center lever 14.
  • the fuel injection pump works as follows. If the tensioning lever 9 is pressed by the control spring 6 onto the lever arms 31 and 32 of the rocker arms 18 and 19, which in turn is the force of the control spring or the actuating force exerted on it by the adjusting lever 7 via the driving part 15 which is adjusted by means of the torsion springs 21 and 22 Transfer center lever 14, which then presses against the adjusting member.
  • the stepper motor 8 presses over the torsion spring 22 of the second rocker arm 19 and presses the center lever 14 with the braced first rocker arm 18 into the idle position. If the stepper motor 8 is blocked in this position due to a malfunction, the adjusting lever 7 can be used to press the tensioning lever 9 against the first rocker arm 18, the lever arm 20 lifting off from the driving part 15.
  • the control spring 6 has a higher spring force than the torsion spring 21 on the first rocker arm 18. The limitation of this emergency adjustment takes place after the tensioning lever 9 is in contact with the one lever arm 32 of the second rocker arm 19, which is in contact with the stop screw 34 with its third lever arm 35 . The force of the control spring 6 is no longer sufficient to overcome both torsion springs 21, 22. With this rocker arm arrangement, instead of a simple two-armed stop lever 13, it is possible to realize a somewhat larger injection quantity after blocking the stepping motor in the idle position and thus to ensure emergency operation of the internal combustion engine.

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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (3)

  1. Pompe d'injection de carburant pour moteurs à combustion interne avec un organe de réglage (2) de la quantité de carburant injectée coopérant avec un piston de pompe (1), organe susceptible d'être actionné par un levier de réglage (9, 10), et d'être déplacé contre l'action d'un ressort de réglage (6) par une force (5) dépendant de la vitesse de rotation, tandis que la course de déplacement du levier de réglage (9, 10) est susceptible d'être limitée par un levier de butée (13) susceptible d'être déplacé par un moteur pas à pas (8), caractérisée en ce que le levier de butée (13) est un dispositif de levier de butée, constitué d'un premier levier entraîné (18) et d'un levier (14) disposé parallèlement à celui-ci, susceptible d'être déplacé par le moteur pas à pas, et avec lequel le levier entraîné est couplé par interpénétration par la force grâce à un ressort (21).
  2. Pompe d'injection de carburant selon la revendication 1, caractérisée en ce que le dispositif de levier de butée est constitué par trois leviers, le levier (14) sollicité par le moteur pas à pas relié par une pièce d'entraînement (15) avec un premier et un second levier entraîné (18, 19), par application et par interpénétration par la force dans un premier sens de rotation et par l'intermédiaire respectivement d'un ressort (21, 22) dans l'autre sens de rotation.
  3. Pompe d'injection de carburant selon la revendication 2, caractérisée en ce que les leviers entraînés (18, 19) sont maintenus contre une pièce d'entraînement (15) respectivement par deux ressorts (21, 22), ressorts contre l'action desquels ils sont susceptibles d'être décollés de la pièce d'entraînement (15) dans le sens du mouvement de déplacement du levier de réglage (9, 10) vers une quantité de carburant injectée plus importante sous l'action d'un ressort de réglage (6) ; le second levier entraîné (19) comporte un troisième bras (35), qui est susceptible d'être amené en appui contre une butée réglable (34), grâce à laquelle la course de déplacement du second levier entraîné (19) est limitée dans le sens d'une diminution de la quantité de carburant injectée.
EP92110718A 1991-07-11 1992-06-25 Pompe d'injection de carburant pour moteurs à combustion interne Expired - Lifetime EP0522359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4122879 1991-07-11
DE4122879A DE4122879A1 (de) 1991-07-11 1991-07-11 Kraftstoffeinspritzpumpe fuer brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0522359A1 EP0522359A1 (fr) 1993-01-13
EP0522359B1 true EP0522359B1 (fr) 1994-10-12

Family

ID=6435861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92110718A Expired - Lifetime EP0522359B1 (fr) 1991-07-11 1992-06-25 Pompe d'injection de carburant pour moteurs à combustion interne

Country Status (6)

Country Link
US (1) US5193504A (fr)
EP (1) EP0522359B1 (fr)
JP (1) JPH05202770A (fr)
KR (1) KR930002649A (fr)
DE (2) DE4122879A1 (fr)
ES (1) ES2063552T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6073768B2 (ja) * 2013-09-30 2017-02-01 ヤンマー株式会社 燃料噴射ポンプ

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1568239A (en) * 1976-02-12 1980-05-29 Semmler F Vehicle having an internal combustion engine and apparatus for controlling fuel supply to the engine
DE2708437A1 (de) * 1977-02-26 1978-08-31 Daimler Benz Ag Luftverdichtende einspritzbrennkraftmaschine, insbesondere fuer personenkraftwagen
US4191061A (en) * 1978-06-12 1980-03-04 Deere & Company Solenoid-operated fuel flow control for fuel injection system
DE3243349A1 (de) * 1982-11-24 1984-05-24 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe
US4656980A (en) * 1984-07-11 1987-04-14 Diesel Kiki Co., Ltd. Centrifugal governor for internal combustion engines
DE3435986A1 (de) * 1984-10-01 1986-04-10 Robert Bosch Gmbh, 7000 Stuttgart Drehzahlregler fuer kraftstoffeinspritzpumpen
AT395896B (de) * 1985-09-20 1993-03-25 Steyr Daimler Puch Ag Vorrichtung zum steuern einer einspritzpumpe einer einspritz-brennkraftmaschine
JPS62294742A (ja) * 1986-06-13 1987-12-22 Isuzu Motors Ltd 内燃機関の制御装置
DE3713288A1 (de) * 1986-07-25 1988-02-04 Man Nutzfahrzeuge Gmbh Steuereinrichtung fuer die verstellung des einspritzzeitpunktes und/oder der foerdermenge einer kraftstoffeinspritzpumpe
DE3703073A1 (de) * 1987-02-03 1988-08-11 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
US4922873A (en) * 1988-08-31 1990-05-08 Synchro-Start Electromechanical run/stop actuator for diesel engine
DE3901722C1 (en) * 1989-01-21 1989-11-30 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Mechanical speed controller, provided with an electronically controlled adjustment device, for a series injection pump of internal combustion engines with air compression and autoignition
DE3914263C1 (fr) * 1989-04-29 1990-09-13 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De

Also Published As

Publication number Publication date
KR930002649A (ko) 1993-02-23
US5193504A (en) 1993-03-16
EP0522359A1 (fr) 1993-01-13
JPH05202770A (ja) 1993-08-10
ES2063552T3 (es) 1995-01-01
DE4122879A1 (de) 1993-01-14
DE59200620D1 (de) 1994-11-17

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