EP0914554B1 - Injecteur-pompe - Google Patents

Injecteur-pompe Download PDF

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Publication number
EP0914554B1
EP0914554B1 EP98928289A EP98928289A EP0914554B1 EP 0914554 B1 EP0914554 B1 EP 0914554B1 EP 98928289 A EP98928289 A EP 98928289A EP 98928289 A EP98928289 A EP 98928289A EP 0914554 B1 EP0914554 B1 EP 0914554B1
Authority
EP
European Patent Office
Prior art keywords
pump
nozzle
pump nozzle
piston
nozzle according
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
EP98928289A
Other languages
German (de)
English (en)
Other versions
EP0914554A1 (fr
Inventor
Günter Kampichler
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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 Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP0914554A1 publication Critical patent/EP0914554A1/fr
Application granted granted Critical
Publication of EP0914554B1 publication Critical patent/EP0914554B1/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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M59/28—Mechanisms therefor
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift

Definitions

  • the invention relates to a pump nozzle for injection of fuel in an internal combustion engine, in particular a single cylinder diesel engine that has a piston foot, a pump cylinder, a pump piston, a Spacer and an injection nozzle with compression spring, Compression spring plate and nozzle needle.
  • injection pumps form and injector one unit.
  • Per cylinder a pump nozzle built into the cylinder head and either directly via a piston foot or indirectly via Rocker arm driven by the camshaft.
  • the regulation can either via a common control rod in the Cylinder head similar to an inline injection pump or by an alternative low pressure metering pump.
  • the overflow hole that for in-line injection pumps for volume control is controlled with the bevel edge over a fast switching high pressure solenoid valve operated. As long as that Solenoid valve is closed, promotes the pump nozzle.
  • DE 4127003 A1 discloses a generic electrical system controlled pump nozzle for fuel injection devices in internal combustion engines. These Pump nozzle described has a pump housing, the contains a pump cylinder in which a pump work space limiting, driven with constant stroke Pump piston is guided. In extension of his A holding body is arranged on the central axis, against which a nozzle body connects via an intermediate plate.
  • a pump nozzle known from GB-A-2226078 is indeed the compression spring for actuating the nozzle needle on the side arranged the axis of the nozzle needle; this is supposed to Tilting an intermediate washer around defined end stops be made possible.
  • the compression spring is in axial Seen in direction, between nozzle needle and pump cylinder arranged.
  • DE-AS 1126678 proposes a pump nozzle which is used to reduce the fuel gases heated surface of the injection housing and Reduction of the housing diameter of a disc spring is provided as a pressure valve spring.
  • this has Solution the disadvantage that the spring pressure is not adjustable is and the use of commercially available pump components excluded to reduce costs is.
  • the object of the present invention is therefore a to create inexpensive pump nozzle that has a short overall length and therefore also for Small diesel engines is suitable.
  • the pump nozzle according to the invention is constructed in such a way that a pump piston foot with a pump piston is connected, which is accommodated in a pump cylinder is.
  • a washer and an adjoining one Nozzle needles form the nozzle with a nozzle body.
  • Laterally is offset to the nozzle needle axis next to the Pump cylinder a compression spring as a nozzle needle closing spring arranged.
  • the compression spring can advantageous in a manner known per se as Coil spring be formed, the axis of which is parallel runs to the nozzle needle axis.
  • a further development of the invention provides that the Nozzle needle via a bell crank with the spring pressure the prestressed compression spring is applied.
  • the reversing lever advantageously has in each case a joint or a lever support point on the Intermediate disc, the nozzle needle and the pressure spring plate on.
  • the opening pressure must be like this be great that he is the one by the compression spring over the Spring lever applied to the nozzle needle overcomes and counteracts this. The further the The nozzle needle lifts out of its nozzle seat, the more it gets the compression spring compressed. Conversely, at The nozzle needle is reached by the closing pressure Compression spring sealing over the bell crank into the nozzle opening pressed and the injection nozzle is thus closed.
  • the intermediate disk advantageously has one Longitudinal groove for receiving the bell crank. hereby the overall length can be shortened further.
  • An advantageous development of the present invention provides that for mechanical control of the Injection quantity a piston vane between the piston foot and Pump piston and a control sleeve is provided.
  • fuel metering takes place after Overflow principle with inclined edges, with the useful stroke the pump element is varied by twisting.
  • the Pump cylinders are inlet bores with are connected to the suction chamber of the injection pump.
  • the control sleeve is advantageously profiled Sheet metal sleeve formed with a control handlebar. So can the control sleeve, for example, from a polygonal profile exist, which the piston flag enough play to axial up and down movement, but which over the riveted or spot-welded control handlebars for the Rotation of the pump piston and thus the longitudinal groove provides. This can result in an expensive and complex Control rack, which in a sealing, attached to the piston Gear engages, can be dispensed with.
  • Another advantageous embodiment provides that an upstream for electronic injection control Solenoid valve is arranged. This allows injection quantity and start of injection in a simple manner be regulated by a component.
  • the piston foot through a driver connected to a drive element is.
  • the drive element e.g. a drive cam or Rocker arm
  • To produce pivoting of the driver results a particularly simple assembly of the injection pump on Engine.
  • the driver is simply over the footplate pivoted so that it is over the back of the Footplate engages and lifts it off the drive element prevents operation of the engine. This allows the usual expensive for conventional injection pumps Piston spring to be replaced completely.
  • the compression spring chamber is designed as a fuel supply. Through this Multiple functions will also become a cost-saving compact design achieved.
  • Fig. 1 shows an advantageous embodiment of the Pump nozzle 1 according to the invention with a driver 2. This is with a piston foot 3 of a pump piston 7 connected to a drive element, not shown. At the Piston base 3 is a piston vane 4, which in a profiled control sleeve 5 with a control handlebar 6 is axially freely movable.
  • the pump piston 7 is arranged in a pump cylinder 8 which is in turn received in a pump nozzle housing 9.
  • the pump nozzle housing 9 is on one side by a Cover 10, a sealing cord 11 and screws 12 sealed.
  • the pump nozzle housing 9 has furthermore a compression spring chamber 13 with a compression spring 14 and a compression spring plate 15.
  • the Pump nozzle housing 9 has a recess 25, the on the one hand opens into the compression spring chamber 13 and on the other other through the holes 26, 27 with the interior of the Pump cylinder 8 is connected.
  • An adjustment eccentric 50 serves to rotate the element cylinder relative to the Pump nozzle housing 9 and thus for fine calibration of the Injection quantity.
  • a ring seal 51 ensures that High pressure seal of the pump cylinder 8 against the Washer 16.
  • FIG. 2 shows a further section through the pump nozzle, viewed from arrow direction A in Fig. 1.
  • a further dowel pin 28 for positioning the washer 16 on the nozzle body 22 and to recognize the fuel line 29.
  • the fuel line 29 is connected to the cover 10 and has an overlap with the compression spring chamber 13 (see Fig. 3).
  • Fig. 3 shows a schematic plan view of the Pump nozzle according to Fig. 1.
  • Fig. 4 shows a section along the line IV-IV Fig. 1 with the dashboard positions indicated by dashed lines 30, 31 and 32. Furthermore, the bell crank 17 and the cord seal 11 are shown. Clear is the position of the dowel pins 24, 28 and Pressure channel 23 can be seen in the intermediate disc 16.
  • the IV-IV line is staggered Cut and run through the cord seal 11, then down and cuts the washer 16 there, but not the lever 17 used in it Compression spring 14 and the compression spring plate 15 are the clearer representation due to expanded.
  • the fuel gets under the delivery pressure of the fuel pump through the fuel line 29 in the too acting as a suction chamber compression spring chamber 13 and thereby in the annular space 25, from where it passes through the bores 26 or 27 enters the interior of the pump cylinder 8.
  • a drive element e.g. one Cam
  • the piston foot 3 and thus the pump piston 7 axially from the bottom toward the intermediate plate 16 and thus shifted towards the OT.
  • the piston vane 4 moves within the control sleeve during this process 5 axial.
  • the pressure in the Pressure channel 23 until it is larger than that on the Nozzle needle exerted by the lever 17 spring pressure.
  • the bell crank 17 is in a longitudinal groove 52 performed, which is arranged in the intermediate plate 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (9)

  1. Buse à pompe (1) pour l'injection de carburant dans un moteur à combustion, en particulier un moteur diesel monocylindre, qui présente un pied de piston (3), un cylindre de pompe (8), un piston de pompe (7), un disque intermédiaire (16) et une buse d'injection avec un ressort de compression (14), une plaque de ressort à compression (15) et une aiguille d'injecteur (20),
    caractérisée en ce que
    le ressort de compression (14) est disposé décalé latéralement par rapport à l'axe de l'aiguille d'injecteur près du cylindre de pompe (8).
  2. Buse à pompe selon la revendication 1,
    caractérisée en ce que
    l'aiguille d'injecteur (20) est sollicitée par l'intermédiaire d'un culbuteur (17) par la pression de ressort du ressort de compression précontraint (14).
  3. Buse à pompe selon la revendication 2,
    caractérisée en ce que
    le culbuteur (17) présente respectivement une articulation ou des points d'appui pour culbuteur (18, 19) sur le disque intermédiaire (16) de l'aiguille d'injecteur (20) et de la plaque de ressort de compression (15).
  4. Buse à pompe selon la revendication 2,
    caractérisée en ce que
    le disque intermédiaire (16) présente une rainure longitudinale (52) destinée à recevoir le culbuteur (17).
  5. Buse à pompe selon la revendication 1,
    caractérisée en ce que
    pour le réglage mécanique de la quantité d'injection, un méplat de piston (4) et une douille de réglage (5) sont prévus.
  6. Buse à pompe selon la revendication 5,
    caractérisée en ce que
    la douille de réglage (5) est configurée comme une douille en tôle profilée avec une bielle de réglage (6).
  7. Buse à pompe selon la revendication 1,
    caractérisée en ce que
    pour le réglage électronique de l'injection, une soupape magnétique disposée en amont est prévue.
  8. Buse à pompe selon la revendication 1,
    caractérisée en ce que
    le pied de piston (3) est relié à un élément de propulsion par l'intermédiaire d'un entraíneur (2).
  9. Buse à pompe selon la revendication 1,
    caractérisée en ce que
    l'espace du ressort à compression (13) est configuré comme une voie d'alimentation en carburant.
EP98928289A 1997-05-21 1998-05-18 Injecteur-pompe Expired - Lifetime EP0914554B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19721241 1997-05-21
DE19721241A DE19721241C1 (de) 1997-05-21 1997-05-21 Pumpedüse
PCT/EP1998/002917 WO1998053196A1 (fr) 1997-05-21 1998-05-18 Injecteur-pompe

Publications (2)

Publication Number Publication Date
EP0914554A1 EP0914554A1 (fr) 1999-05-12
EP0914554B1 true EP0914554B1 (fr) 2002-11-27

Family

ID=7830079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98928289A Expired - Lifetime EP0914554B1 (fr) 1997-05-21 1998-05-18 Injecteur-pompe

Country Status (6)

Country Link
US (1) US6202940B1 (fr)
EP (1) EP0914554B1 (fr)
JP (1) JP2000515609A (fr)
CN (1) CN1083936C (fr)
DE (2) DE19721241C1 (fr)
WO (1) WO1998053196A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10326707B3 (de) * 2003-06-11 2005-01-27 Westport Germany Gmbh Ventilvorrichtung und Verfahren zum Einblasen von gasförmigem Kraftstoff
WO2006008728A1 (fr) * 2004-07-20 2006-01-26 Mazrek Ltd. Dispositif de blocage de ressort d'aiguille pour injecteur-pompe (injecteur) dans des moteurs a combustion interne
CN114992023B (zh) * 2022-06-09 2023-09-26 北京航空航天大学 一种适应负碳生物燃料的航空发动机喷油控制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126678B (de) * 1955-08-02 1962-03-29 Max Mangl Aus Pumpe und Duese zusammengefasstes Brennstoffeinspritzgeraet fuer Brennkraftkolbenmaschinen
DE3331336A1 (de) * 1983-08-31 1985-03-14 L'Orange GmbH, 7000 Stuttgart Kraftstoffeinspritzvorrichtung
GB2226078A (en) * 1988-11-09 1990-06-20 Lucas Ind Plc C.i. engine fuel injection nozzle
DE4127003A1 (de) * 1991-08-16 1993-02-18 Bosch Gmbh Robert Elektrisch gesteuerte pumpeduese fuer kraftstoffeinspritzvorrichtungen in brennkraftmaschinen
US5326034A (en) 1993-07-27 1994-07-05 Cummins Engine Company, Inc. Compact closed nozzle assembly for a fuel injector

Also Published As

Publication number Publication date
CN1083936C (zh) 2002-05-01
EP0914554A1 (fr) 1999-05-12
JP2000515609A (ja) 2000-11-21
CN1226949A (zh) 1999-08-25
US6202940B1 (en) 2001-03-20
DE59806428D1 (de) 2003-01-09
WO1998053196A1 (fr) 1998-11-26
DE19721241C1 (de) 1998-11-05

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