EP0429592B1 - Pompe d'injection de carburant pour moteurs a combustion interne - Google Patents

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

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Publication number
EP0429592B1
EP0429592B1 EP90908464A EP90908464A EP0429592B1 EP 0429592 B1 EP0429592 B1 EP 0429592B1 EP 90908464 A EP90908464 A EP 90908464A EP 90908464 A EP90908464 A EP 90908464A EP 0429592 B1 EP0429592 B1 EP 0429592B1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
fuel injection
injection pump
bearing
angular position
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
EP90908464A
Other languages
German (de)
English (en)
Other versions
EP0429592A1 (fr
Inventor
Wolfgang Fehlmann
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.)
OFFERTA DI LICENZA AL PUBBLICO;AL PUBBLICO
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 EP0429592A1 publication Critical patent/EP0429592A1/fr
Application granted granted Critical
Publication of EP0429592B1 publication Critical patent/EP0429592B1/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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/121—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor with piston arranged axially to driving shaft
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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

Definitions

  • the invention relates to a fuel injection pump for internal combustion engines according to the preamble of claim 1.
  • Such a fuel injection pump is already known from DE-OS 33 36 871.
  • This fuel injection pump has a pump and distributor piston as well as a lifting disk driving it in a rotary-stroke movement.
  • the lifting disk which is non-rotatably connected to a drive shaft, receives its lifting movement as a result of the rolling off of end cams arranged on the lifting disk on rollers of a fixed roller ring.
  • the fuel injection pump is provided with a rotary encoder which has marks arranged on the circumference of a part which rotates synchronously with the drive shaft and a detector which scans the marks.
  • the detector is attached to the roller ring, which can be rotated by an injection adjuster for the purpose of adjusting the injection timing.
  • the roller ring and the drive shaft are not supported against each other, so that the two parts can perform uncontrolled relative movements to one another which are superimposed on the actual rotary movement and thus falsify the measurement result.
  • the fuel injection pump according to the invention with the characterizing features of claim 1 has the advantage that uncontrolled relative movements between these two parts are prevented by the bearing between the rotatable part of the cam drive and the drive shaft and high accuracy in the detection of the speed and the rotational position of the drive shaft is achieved.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a fuel injection pump as a longitudinal section.
  • the figure shows a fuel injection pump of the distributor type for a diesel internal combustion engine.
  • a drive shaft 11 is mounted in the housing 10 of the injection pump.
  • This is coupled to a lifting disk 12 which is arranged transversely to the axis of the drive shaft 11 and which, as part of a cam drive, carries a cam track 13 with end cam elevations 14.
  • the running surface of the lifting disc 12 rests on rollers 16 which are held in a roller ring 17 which also belongs to the cam drive.
  • This is rotatably supported in a cylindrical recess of the housing and is supported axially fixed to the housing on a bottom part of the recess.
  • the lifting disk 12 executes a rotating-lifting movement.
  • a pump working space 23 is delimited in the cylinder liner 19 by the pump piston 21 on the one hand and a solenoid valve 22 inserted into the cylinder liner 19 on the other hand.
  • the pump working chamber 23 can be connected to the pump interior 28 via channels 24 and 25 in the solenoid valve 22 and a fuel channel 27 in the cylinder liner 19.
  • the passage of the channels 24 and 25 in the solenoid valve 22 can be closed by a valve closing element, not shown, so that the pump working space 23 is separated.
  • the solenoid valve 22 is actuated by a control unit, not shown, which operates as a function of parameters which are to be taken into account for the dimensioning and the timing of the fuel injection quantity and which can contain a map for this purpose, in which target values for the fuel quantity to be injected are contained.
  • a control unit not shown, which operates as a function of parameters which are to be taken into account for the dimensioning and the timing of the fuel injection quantity and which can contain a map for this purpose, in which target values for the fuel quantity to be injected are contained.
  • the passage between the channels 24 and 25 in the solenoid valve 22 is closed at a point in time determined by the control device and thus the pump work chamber 23 is closed, so that pressure builds up in the pump work chamber 23 and fuel via an axial relief channel 20 in the pump piston and one connected with this distributor opening 31 in a delivery line 32 leading to a cylinder of the internal combustion engine is pressed.
  • the passage between the channels 24 and 25 is opened again and the pressure delivery into the delivery line 32 is thus interrupted and the injection is ended.
  • the fuel delivered by the pump piston 21 until it reaches its top dead center then flows back into the pump interior 28 via the channels 24 and 25 and the fuel channel 27.
  • An injection adjuster 33 is also provided in the injection pump, which adjusts the injection timing in the direction of increasing speed.
  • the injection adjuster 33 rotates the roller ring 17 in the circumferential direction, so that the lifting movement of the lifting disk 12 takes place earlier in relation to the angle of rotation of the drive shaft.
  • the control device To control the solenoid valve 22, the control device requires signals relating to the rotational speed and the rotational position of the drive shaft 11. These signals are obtained via a rotary position sensor 34, of which a sensor wheel 36 is connected in a rotationally fixed manner to the drive shaft 11. A part of the rotary position sensor 34 designed as a detector 37 is fastened in the roller ring 17, which is provided with a cylindrical extension 35 and with which it surrounds the sensor wheel 36 on its circumference. A number of marks 38 corresponding to the number of cylinders of the internal combustion engine is attached to the transmitter wheel 36.
  • the arrangement of the marks 38 is selected such that the detector 37 detects a mark 38 when the drive shaft 11 assumes a certain rotational position in which the pump piston 21 has reached its bottom dead center, for example, and the delivery stroke of the pump piston 21 begins.
  • a large number of equidistant markings 39 are arranged between two marks 38 on the encoder wheel 36.
  • the markings 39 are clearly distinguishable from the marks 38, e.g. B. by different Size.
  • the markings 39 are also detected by the detector 37, but it is also possible to use a further separate detector to scan the markings 39.
  • the current speed of the drive shaft 11 is determined with the aid of the markings 39.
  • the roller ring 17 is connected to the drive shaft 11 via a bearing 41, which is designed here as a deep groove ball bearing.
  • the bearing 41 is pressed between the cylindrical extension 35 of the roller ring 17 and a shaft section 42 of the drive shaft 11.
  • the encoder wheel 36 is fixed between the bearing 41 and a collar 43 of the drive shaft 11.

Landscapes

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

Abstract

Une pompe d'injection de carburant pour moteurs à combustion interne comprend un piston plongeur et distributeur (21) entraîné par un disque à came (12) de manière à effectuer un mouvement linéaire et de rotation. Dans le sens de rotation, le disque à came (12) est couplé à un arbre moteur (11) et pénètre, avec une came frontale (14) portée par le disque, dans un rouleau (16) guidé dans une bague de roulement (17) essentiellement fixe. Afin de saisir la vitesse de rotation et la position angulaire de l'arbre moteur (11), un capteur (34) de la position angulaire comprend une roue de détection (36) assujettie à l'arbre moteur (11) de manière rigide et un détecteur (37) assujetti à la bague de roulement (17) qui balaie la roue de détection (36). La bague de roulement (17) est montée sur l'arbre moteur (11) au moyen d'un roulement à billes (41), de façon à éliminer des mouvements relatifs incontrôlés entre le détecteur (37) et la roue de détection (36) et à permettre une détection de haute précision de la position angulaire et de la vitesse de rotation de l'arbre moteur (11).

Claims (4)

  1. Pompe d'injection de carburant pour moteur thermique, comprenant au moins un piston de pompe (21) déplacé par un moyen d'entraînement à cames, qui se compose d'une partie (17) essentiellement fixe et d'une partie (12) tournante, entraînée par un axe d'entraînement (11), l'une des parties portant un chemin de cames (12) avec plusieurs bossages (14) et la partie rotative (17) peut être tournée par rapport à cette partie essentiellement fixe par un moyen de réglage (33) et l'association de la course d'au moins un piston de pompe (21) engendrée par les bossages (14) et l'angle de rotation de l'axe d'entraînement (11) est variable et comporte une installation pour commander l'injection de carburant en utilisant un capteur de position de rotation (34) avec une première partie de capteur (36) couplée à la partie (17) de l'entraînement par cames, susceptible d'être tournée par l'installation de réglage (33) et comporte la seconde partie de capteur (38, 39), ces parties étant montées sur l'axe d'entraînement (11) ou sur une pièce (36) solidaire en rotation de l'axe d'entraînement (11), pompe caractérisée en ce que la partie (17) susceptible d'être tournée par l'installation de réglage (33) du moyen d'entraînement par cames s'appuie par un palier (41) sur l'axe d'entraînement (11).
  2. Pompe d'injection de carburant selon la revendication 1, caractérisée en ce que le palier (41) est un palier de roulement.
  3. Pompe d'injection de carburant selon la revendication 2, caractérisée en ce que le palier (41) est un palier à billes et rainures.
  4. Pompe d'injection de carburant selon la revendication 2 ou 3, caractérisée en ce que la partie (17) du moyen d'entraînement par cames, qui peut être tournée par l'installation de réglage (33) du moyen d'entraînement par cames, est munie d'un prolongement cylindrique (35), le palier (41) étant fretté entre ce prolongement et l'axe d'entraînement (11).
EP90908464A 1989-06-22 1990-06-01 Pompe d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0429592B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920459A DE3920459A1 (de) 1989-06-22 1989-06-22 Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3920459 1989-06-22

Publications (2)

Publication Number Publication Date
EP0429592A1 EP0429592A1 (fr) 1991-06-05
EP0429592B1 true EP0429592B1 (fr) 1993-09-01

Family

ID=6383335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90908464A Expired - Lifetime EP0429592B1 (fr) 1989-06-22 1990-06-01 Pompe d'injection de carburant pour moteurs a combustion interne

Country Status (7)

Country Link
US (1) US5138997A (fr)
EP (1) EP0429592B1 (fr)
JP (1) JP3059212B2 (fr)
KR (1) KR0159257B1 (fr)
DE (2) DE3920459A1 (fr)
ES (1) ES2043378T3 (fr)
WO (1) WO1990015925A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9121988D0 (en) * 1991-10-16 1991-11-27 Lucas Hartridge Limited Volumetric metering equipment
DE4135595A1 (de) * 1991-10-29 1993-05-06 Robert Bosch Gmbh, 7000 Stuttgart, De Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE4137073A1 (de) * 1991-11-12 1993-05-13 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE4341424A1 (de) * 1993-12-04 1995-06-08 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
US6513371B1 (en) * 2001-07-31 2003-02-04 Diesel Technology Company Method for determining fuel injection rate shaping current in an engine fuel injection system
US6832748B2 (en) * 2001-12-05 2004-12-21 Cummins Inc. Outwardly opening, seat-sealed, force balanced, hydraulic valve and actuator assembly
DE102005014808B4 (de) * 2005-03-31 2009-11-26 Siemens Ag Messeinrichtung
BR202017028330U2 (pt) * 2017-12-27 2019-07-16 Robert Bosch Limitada Disposição construtiva introduzida em bomba de combustível

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2142704C3 (de) * 1971-08-26 1974-04-25 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe für mehrzylindrige Brennkraftmaschinen
JPS53146029A (en) * 1977-05-23 1978-12-19 Nippon Soken Inc Fuel injector for internal combustion engine
GB2069596B (en) * 1980-01-17 1984-01-11 Nissan Motor Fuel injection pump electrical fuel delivery control system
JPS5765858A (en) * 1980-10-07 1982-04-21 Toyota Motor Corp Fuel control device of diesel engine
US4367714A (en) * 1981-01-19 1983-01-11 Ambac Industries Incorporated Fuel injection pump
JPS59208156A (ja) * 1983-05-13 1984-11-26 Nippon Denso Co Ltd 分配型燃料噴射ポンプの燃料噴射時期調整装置
IT1194272B (it) * 1983-06-14 1988-09-14 Spica Spa Miglioramenti ai sistemi di regolazione delle pompe iniezione per motori a combustione interna
JPS6067749A (ja) * 1983-09-21 1985-04-18 Nippon Denso Co Ltd 燃料噴射ポンプの噴射時期制御装置
DE3336871A1 (de) * 1983-10-11 1985-04-25 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe fuer mehrzylindrige brennkraftmaschinen
JPH07111151B2 (ja) * 1984-01-10 1995-11-29 日本電装株式会社 デイ−ゼルエンジン用燃料噴射量制御装置

Also Published As

Publication number Publication date
WO1990015925A1 (fr) 1990-12-27
DE59002553D1 (de) 1993-10-07
KR920701655A (ko) 1992-08-12
US5138997A (en) 1992-08-18
DE3920459A1 (de) 1991-01-03
KR0159257B1 (ko) 1998-12-15
JPH04500400A (ja) 1992-01-23
JP3059212B2 (ja) 2000-07-04
ES2043378T3 (es) 1993-12-16
EP0429592A1 (fr) 1991-06-05

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