EP0742365B1 - Dispositif d'injection de combustible - Google Patents

Dispositif d'injection de combustible Download PDF

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Publication number
EP0742365B1
EP0742365B1 EP96107096A EP96107096A EP0742365B1 EP 0742365 B1 EP0742365 B1 EP 0742365B1 EP 96107096 A EP96107096 A EP 96107096A EP 96107096 A EP96107096 A EP 96107096A EP 0742365 B1 EP0742365 B1 EP 0742365B1
Authority
EP
European Patent Office
Prior art keywords
piston
fuel
control
pump element
fuel injection
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
EP96107096A
Other languages
German (de)
English (en)
Other versions
EP0742365A2 (fr
EP0742365A3 (fr
Inventor
Aaltje Keuning
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0742365A2 publication Critical patent/EP0742365A2/fr
Publication of EP0742365A3 publication Critical patent/EP0742365A3/fr
Application granted granted Critical
Publication of EP0742365B1 publication Critical patent/EP0742365B1/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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • 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
    • 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
    • F02M59/265—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 characterised by the arrangement or form of spill port of spill contour on the piston
    • 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

Definitions

  • the invention relates to a fuel injection device according to the preamble of the main claim.
  • Fuel injectors are e.g. B. for Diesel engines both in stationary systems and in Ship area used. These are fuel injectors with a fuel supply connected and introduce an injector accurately measured amount of fuel under pressure.
  • Injection piston pumps are known, for example driven by the camshaft of an engine and where a quantity control, for example via a control edge.
  • a quantity control for example via a control edge.
  • Rotation of the pump piston with the one arranged on it Control edge over a rule linkage, and this The type of control has proven to be very robust.
  • a disadvantage of this injection pump is that failure of the electronic control of the pistons the pump element from an operating position in an emergency position must be turned, the mechanical regulation exclusively in this Emergency position works.
  • transitioning from the Normal position to the emergency position is a regulation of Injection pump not possible and it can happen that the adjustment of the piston positioning in an emergency does not work because e.g. B. the Piston adjustment mechanism jams or gets stuck since it has not been operated for a long time.
  • the invention is therefore based on the object To create fuel injection system for engines which is an electronic control and a mechanical one Control allowed, the mechanical system of the electronic control system is superior, so that z. B. in the event of failure of the electronic system Transition from electronic to mechanical Stepless control, d. H. immediately, without additional measures or devices required are.
  • a fuel injector suggested that normally electronic control of the fuel supply to the fuel injector, being the electronic control system but always a mechanical control system is higher and therefore in the event of a failure of the electronic control without any delay the actual control of the fuel injection quantities makes.
  • This fuel injector consists of essentially from a first piston 1, a second piston 2, the first and second pistons 1 and 2 movably arranged in a cylinder 3 or 3A are.
  • the first piston 1 is a first fuel inlet 4 assigned and the second piston 2 is a second Associated with fuel inlet 5; at the liquid inlet 4 it can be a supply line, about the z. B. fuel the workspace of the Cylinder 3 is supplied. However, it can also another liquid to the working space of the cylinder 3 are supplied, this liquid advantageously better lubricating properties and has hydraulic properties than the known ones Fuels.
  • an appropriate Liquid with better lubricating properties and hydraulic properties is, the mechanical load of the Piston 1, cylinder 3 and control edges 11 of the piston 1, in particular the cavitation on the control edge 11. This will make it usable and extended life of these components.
  • the piston 1 is controlled via a Cam 8, which is arranged on a camshaft 9 is, the stroke of the cam 8 for example one shown only schematically in the drawing Push rod 10 is transmitted.
  • a control edge 11 is formed on the first piston 1, the one for regulating the amount of fuel is used, and the piston 1 together with the control edge 11 is represented by a schematically Control linkage 12 moves to thereby control to allow the fuel flow.
  • the first piston 1 has one with the reference symbol 14 marked stroke and the outlet of the by the first piston 1 is applied amount of fuel made by a control valve 15.
  • the control valve 15 is controlled electronically, the open or the closing of the control valve 15 of a computer or microcomputer 21 is regulated, d. H. the computer determines the time when the control valve 15 opened or closed again can be. Through this electronic Control of the control valve 15 is an optimal Regulation of the fuel supply to the Injector 7 allows.
  • a check valve 20 arranged so that fuel in the lower area of the Cylinder 3 is supplied only via the 1st fuel inlet 4 can be.
  • an overflow valve 22 is arranged so that the Feed pressure over the piston 1 is guaranteed.
  • the second piston 2 Downstream of the first piston 1, i.e. H. in the direction the injection nozzle 7, the second piston 2 is arranged, the one indicated by reference numeral 16 Hub executes. As mentioned above, is above of the second piston 2, a second fuel inlet 5 provided, the one located at top dead center second piston 2 by a spring 17 again is pushed down into its starting position.
  • the second piston 2 on other Place as arranged from the drawing emerges, for example, it is possible the second Piston 2 with a corresponding cylinder in to arrange the injector 7 or in the fuel line 6. It is also possible to build pressure in the fuel line 6, and thus the delivery rate, to be influenced in time by special Piston designs 2.
  • Fuel injector In normal operation, the mode of operation is as shown Fuel injector as follows:
  • the pressure in the fuel supply system 4, 5 is relative low.
  • the pressure at which the relief valve 22 opens, is slightly higher than the fuel supply pressure, however much less than that of Piston 1 generate pressure.
  • control linkage 12 In the operating state shown there is the control linkage 12 is always at the maximum position Performance unless due to a impending overspeed or a so-called "Back-up" operating situation the rule linkage a lower power is set.
  • the rule linkage 12 is from an external speed controller and / or a maximum controller set.
  • Control valve 15 which can be a solenoid valve, automatically close and would also be in the further course of the different operating states closed. In this state it would be above the moving piston 1 form a fuel column, when moving the first one back and forth Piston 1 a corresponding lifting of the piston 2 would cause. If the piston 2 on his top dead center, the piston 2 is due the spring 17 pressed down again and at a new lifting of the first piston 1 and the amount of fuel above is forced the movably mounted piston 2 is raised again. In the displacement above the piston 2 still through the second fuel inlet Fuel supplied, which then via the nozzle 7 in the combustion chamber of the engine is injected.
  • the proposed System even then an injection of Allows fuel, even if the electronics is not functional. If the Electronics becomes fuel injection only by the mechanically controlled injection piston pump carried out and controlled. If however the electronic system is functional, is by the control of the control valve 15th the start of funding and the Delivery rates of the injector controlled, each according to engine and operating conditions, and due to this computer-controlled control of fuel injection times and quantities become special favorable consumption values of the drive motor reached.
  • An advantage of the proposed invention is that a relatively simple and inexpensive retrofit from conventional systems to the proposed System is possible because of structural changes essentially only the addition of the second Piston 2 and the addition of the control valve 15 is required. There is no need for elaborate Arrange devices around the piston from one operating position to the other operating position to twist and it is not necessary against the piston cylinder of the first pump element to replace correspondingly trained components.
  • Another advantage of the proposed system is that when using a liquid with good Lubrication properties of the piston 1 together with the Control edge 11 before aggressive and abrasive Fuel is protected and therefore a longer one Lifetime has than the known injection pumps.
  • Another advantage of the proposed invention is that the principle described is also used can be used for fine control at Control of the intake and exhaust valves of the engine in order Emission values and performance have a positive impact can.
  • fuel instead of fuel, one can Liquid for actuating a valve via the proposed device are promoted, wherein also in this case the mechanical position of the Piston 1 electronically by means of the control edge regulated state.
  • Control is regulated electronically.
  • At this electronic control can be the same or one additional calculator or computing element used be, as for the injection device described above.
  • For the actuation of a valve it is also possible to remove a pestle directly from the Actuate or operate piston 2 to the Transfer movement of the piston 2 to the valve. It is understood that when using the proposed device for controlling the Valve movement the control edge 11 of the piston 1 in their training the special requirements for Valve control corresponds.

Claims (8)

  1. Dispositif d'injection de carburant comprenant une conduite d'amenée du carburant et un injecteur, dans lequel, en amont de l'injecteur est disposé un premier élément de pompe (1, 3) comprenant un piston, une conduite (4) d'amenée de liquide et une conduite d'évacuation de liquide, le débit de liquide pouvant être commandé par une soupape de commande (15) réglée électroniquement, et dans lequel, en cas de défaillance de la commande électronique (15), le premier élément de pompe (1, 3) peut être réglé au moyen d'une commande mécanique, caractérisé par un deuxième élément de pompe (2, 3A) qui est disposé entre le premier élément de pompe (1, 3) et l'injecteur de carburant (7), un piston (2) du deuxième élément de pompe (2, 3A) étant entraíné hydrauliquement par l'intermédiaire du volume de liquide qui est sollicité par le piston (1) du premier élément de pompe (1, 3), et le deuxième élément de pompe (2, 3A) comportant une conduite (5) d'amenée du carburant qui débouche dans la chambre de travail du piston (2), et une conduite de carburant (6) qui part vers l'injecteur.
  2. Dispositif d'injection de carburant selon la revendication 1, caractérisé par l'agencement de la soupape de commande électronique (15) dans une conduite partant du premier élément de pompe.
  3. Dispositif d'injection de carburant selon la revendication 1 ou 2, caractérisé en ce que les premier et deuxième éléments de pompe sont disposés directement l'un à la suite de l'autre.
  4. Dispositif d'injection de carburant selon la revendication 1 ou la revendication 2, caractérisé en ce que le deuxième élément de pompe est disposé au niveau de l'injecteur de carburant (7).
  5. Dispositif d'injection de carburant selon l'une des revendications précédentes, caractérisé en ce que la soupape de commande (15) est reliée à un ordinateur pour son pilotage.
  6. Dispositif d'injection de carburant selon l'une des revendications précédentes, caractérisé par le deuxième élément de pompe, qui est relié à une soupape d'admission ou d'échappement du moteur par une canalisation de liaison au profit d'une commande de la soupape d'admission ou d'échappement.
  7. Dispositif d'injection de carburant selon l'une des revendications précédentes, caractérisé par le deuxième élément de pompe qui est relié à une soupape d'admission ou d'échappement d'un moteur par une liaison mécanique au profit d'une commande de la soupape d'admission ou d'échappement.
  8. Dispositif d'injection de carburant selon l'une des revendications précédentes, caractérisé par le premier élément de pompe dont le piston (1) est équipé d'un bord de commande (11) pour le réglage mécanique de la quantité de carburant.
EP96107096A 1995-05-06 1996-05-06 Dispositif d'injection de combustible Expired - Lifetime EP0742365B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19516686 1995-05-06
DE19516686A DE19516686A1 (de) 1995-05-06 1995-05-06 Kraftstoffeinspritzvorrichtung

Publications (3)

Publication Number Publication Date
EP0742365A2 EP0742365A2 (fr) 1996-11-13
EP0742365A3 EP0742365A3 (fr) 1997-08-27
EP0742365B1 true EP0742365B1 (fr) 2001-01-10

Family

ID=7761260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107096A Expired - Lifetime EP0742365B1 (fr) 1995-05-06 1996-05-06 Dispositif d'injection de combustible

Country Status (4)

Country Link
EP (1) EP0742365B1 (fr)
DE (2) DE19516686A1 (fr)
DK (1) DK0742365T3 (fr)
ES (1) ES2154361T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316981A (en) * 1996-09-10 1998-03-11 Lucas Ind Plc Fuel pump for engine
DE10155718C2 (de) * 2001-11-13 2003-09-18 Hermann Golle Einspritzsystem für Dieselmotoren
DE602007010317D1 (de) 2007-11-05 2010-12-16 Delphi Tech Holding Sarl Flüssigkeitspumpen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037296B1 (fr) * 1980-03-31 1986-11-12 Automobiles Peugeot Dispositif de mesure du volume de carburant injecté dans un moteur thermique à alimentation par injection
US4467963A (en) * 1982-04-02 1984-08-28 The Bendix Corporation Single dump single solenoid fuel injector
JPS59126062A (ja) * 1982-12-31 1984-07-20 Hino Motors Ltd ユニツトインジエクタにおける噴射時期制御装置
JPS61226527A (ja) * 1985-03-30 1986-10-08 Nippon Denso Co Ltd 燃料噴射制御装置
DE3916516A1 (de) * 1989-05-20 1990-11-22 Bosch Gmbh Robert Einspritzpumpe fuer brennkraftmaschinen
DE4100832C2 (de) * 1991-01-14 2000-07-13 Bosch Gmbh Robert Einspritzpumpe für Dieselmotoren

Also Published As

Publication number Publication date
DK0742365T3 (da) 2001-04-23
DE59606286D1 (de) 2001-02-15
DE19516686A1 (de) 1996-11-07
ES2154361T3 (es) 2001-04-01
EP0742365A2 (fr) 1996-11-13
EP0742365A3 (fr) 1997-08-27

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