EP0336922B1 - Elektromechanischer Antrieb für Stellglieder von Pumpedüsen - Google Patents

Elektromechanischer Antrieb für Stellglieder von Pumpedüsen Download PDF

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Publication number
EP0336922B1
EP0336922B1 EP89890086A EP89890086A EP0336922B1 EP 0336922 B1 EP0336922 B1 EP 0336922B1 EP 89890086 A EP89890086 A EP 89890086A EP 89890086 A EP89890086 A EP 89890086A EP 0336922 B1 EP0336922 B1 EP 0336922B1
Authority
EP
European Patent Office
Prior art keywords
rotor
pump nozzle
nozzle according
stator
pole shoes
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
EP89890086A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0336922A1 (de
Inventor
Heinz Ing. Rathmayr
Georg Dipl.-Ing. Ritzinger
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.)
Automotive Diesel GmbH
Original Assignee
Automotive Diesel 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 Automotive Diesel GmbH filed Critical Automotive Diesel GmbH
Priority to AT89890086T priority Critical patent/ATE65113T1/de
Publication of EP0336922A1 publication Critical patent/EP0336922A1/de
Application granted granted Critical
Publication of EP0336922B1 publication Critical patent/EP0336922B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • H01F7/145—Rotary electromagnets with variable gap
    • 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
    • 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
    • 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
    • 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
    • F02M59/243—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movement of cylinders relative to their pistons
    • F02M59/246—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
    • F02M59/20—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the invention relates to an electromechanical drive for actuators of pump nozzles, in particular for the delivery rate and / or injection start adjustment element.
  • the object of the invention is to provide an electromechanical drive which can be used in pump nozzles due to its compact dimensions and good efficiency with a simple and inexpensive construction.
  • the drive according to the invention results in an extremely space-saving structure, which can be coaxial with respect to the rest of the structure of a pump nozzle, which results in a particularly simple mechanical coupling with the quantity actuator or the actuator for changing the injection timing. Further preferred embodiments are the subject of the subclaims.
  • FIG. 1 shows an axial section through the upper part of a pump nozzle with a first embodiment of the drive according to the invention
  • FIG. 2 shows a section along the line II-II of FIG. 1
  • FIG. 3 shows a view corresponding to FIG. 2 a second Embodiment of the invention
  • Fig. 4 and Fig. 5 in views corresponding to Fig. 1 and Fig. 2, a third embodiment of the invention, wherein Fig. 5 shows a section along the line VV of Fig. 4, Fig. 5a the development of one of the two pole pieces of the rotor of the third embodiment, FIGS. 6 and 7 in views corresponding to FIGS.
  • FIG. 7 shows a section along the line VII-VII of FIG. 6
  • FIG 8 shows a fifth embodiment of the invention in a view corresponding to FIG. 1
  • FIG. 9 shows a top view of this embodiment, partially in section
  • FIG. 10 shows an enlarged, partially sectioned partial view in the direction of arrow X in FIG. 9 and 11 show a sixth embodiment of the invention in an axial section through a pump nozzle.
  • a pump nozzle 1 has a housing 2 and a spring-loaded piston 3, which can be actuated by means of a plunger 4 indicated by a broken line.
  • the piston 3 is rotatably connected to a crank arm 5, from which a pin 6 protrudes upwards.
  • the respective delivery rate can be adjusted by turning the crank arm 5 and thus the piston 3.
  • the entire structure of such a pump nozzle which is not shown here in more detail and in which mechanical actuation of the crank arm is provided, for example by means of an adjusting rod, can be found, for example, in the already mentioned AT-PS 372 502.
  • FIG. 1 and 2 also show an upper housing part 7 placed on the housing 2.
  • an upwardly open, hollow pressure bolt 9, on which the tappet 4 engages passes.
  • An essentially hollow cylindrical rotor 10 of the electromechanical drive according to the invention which surrounds the pressure pin 9 concentrically, is mounted on the outer surface of the bush-like region of the upper housing part 7.
  • This rotor is provided on its circumference with two hollow cylinder segment-like permanent magnets 11, 12 which are radially magnetized, which is indicated by the letters N and S.
  • the magnets 11, 12 are diametrically opposite to each other with respect to the axis of rotation a and each extend over an angle of e.g. 120 °.
  • the rotor 10 is provided with an axially parallel outer groove 13, in which the pin 6 of the crank arm 5 engages, so that the rotor 10 is connected to the crank arm 5 and thus to the piston 3 for rotation.
  • the pin 6 is axially displaceably mounted in the outer groove 13 so that it can move in accordance with the piston stroke.
  • the rotor 10 is also spring-loaded in one direction of rotation by means of a torsion spring 14.
  • One end 14a of this torsion spring 14 is anchored to the upper housing part 7, the other end 14b to the rotor 10.
  • a rotor 15 is associated with a stator 15, which has a yoke 15a made of a semicircular laminated core 15a and which has two pole shoes 16, 17 which, while leaving an air gap, are assigned to rotor 10 or its two permanent magnets 11, 12.
  • the stator 15 is provided with an excitation coil 18, the windings of which have axially parallel sections 19 in grooves (not shown here) on the inside of the pole shoes 16, 17.
  • the coil 18 is hiebei so wound that at a certain current flow Current at sections 19 of one pole piece 16 emerges from the drawing plane of FIG. 2 when it enters the drawing plane at sections of the opposite pole piece 17.
  • the remaining winding sections of the coil 18 are guided asymmetrically to one side (to the right in the drawing), which also results in a corresponding construction of the upper housing part 7, which is due to the restricted space, in particular to the position of the camshaft, which is to the left in the drawing the pump nozzle would be, considerate.
  • the drive according to the invention has a space-saving structure and can be used with pump nozzles without these having to be significantly modified.
  • the proportionality between the actuation angle and the excitation current is given with good linearity over the entire adjustment range — approximately 120 ° in the exemplary embodiment described.
  • FIG. 3 A further exemplary embodiment in which the limited space is also taken into account is shown in FIG. 3.
  • the structure of the pump nozzle 1 as such and that of the rotor 10 essentially corresponds to that according to FIGS. 1 and 2 and therefore requires no further explanation.
  • the pin 6 of the crank arm 5 is held in a driving eye 20 of the rotor 10 here.
  • the stator 21 consists of a closed yoke 22, which completely encompasses the rotor 10, made of magnetically soft, ferromagnetic material.
  • Six cores 23a to f protrude inward from the yoke 22. Each of these cores is provided with a pole piece 24a to f at its end. The pole shoes 24 adjoin one another without significant gaps and cover a rotor area of almost 180 °.
  • Each of the cores 23 is wound with an excitation winding 25a to f, all windings being connected in series. Depending on the impedance conditions, a parallel connection or series-parallel connection of the six excitation windings 25 is of course also conceivable.
  • the stator 21, the left half of which is shown in section in the drawing, is constructed symmetrically with respect to a central plane e. There is still enough space between the windings 25b-25c-25d-25e for three fastening bolts 26 or the like. which ensure the connection of the stator 21 or an upper part of the housing (not shown here) to the lower part of the pump nozzle or the mounting of the stator 21.
  • the same purpose is also served by two fastening bolts 27 or the like which penetrate the half-bores of the yoke 22. All or some of the bolts mentioned can also be used to fasten the pump nozzle in the cylinder head or on the camshaft housing.
  • the six pole pieces 24a to f can be regarded as the only pole piece of a specific polarity corresponding to the current flow, to which a second pole piece 28 of opposite polarity is located, which also extends over almost 180 °.
  • the excitation windings are essentially on one side of the pump nozzle 1, so that there is enough space on the opposite side for the camshaft of the motor. With good linearity, an adjustment angle of 90 to 110 ° can be achieved, which corresponds to the usual adjustment angle of crank arm 5.
  • FIGS. 4, 5 and 5a The embodiment of the drive according to the invention shown in FIGS. 4, 5 and 5a has a stator 30 comprising the rotor 29 in a fork-like manner with two pole shoes 31, 32 lying opposite one another.
  • a stator 30 comprising the rotor 29 in a fork-like manner with two pole shoes 31, 32 lying opposite one another.
  • an excitation coil 34 is seated on the web part 33 of the approximately U-shaped stator, which is e.g. is designed as a laminated core.
  • the rotor 29 surrounds the pressure pin 9, which is provided at its lower end with a support plate 35 for a pressure spring 36, as corresponds to the prior art (cf. the already mentioned AT-PS 372 502).
  • the rotor 29 is not provided with permanent magnets, but has two diametrically opposed rotor pole shoes 37, 38.
  • a working air gap 39 remains between the outer surfaces of the rotor pole shoes 37, 38 and the inner surfaces of the stator pole shoes 31, 32 the rotor body outwardly projecting pole shoes 37, 38 are each on one side with a straight, ie bounded in an axial plane of the rotor 29 flat side surface 40, whereas the corresponding boundary surfaces 41 on the other side (seen in the circumferential direction) of the pole shoes 37, 38 slope down from top to bottom.
  • the development of the cylindrically curved outer surface of a rotor pole shoe is illustrated in Fig. 5a.
  • a rotor pole piece extends over an angle of approximately 90 ° and the sloping boundary surface 41 extends over an angle of approximately 30 ° from the upper end face of the rotor to its lower end face.
  • the rotor 29, which is likewise loaded with a torsion spring 14, is shown in FIG. 5 in its position which corresponds to the maximum rotation, ie the maximum operating current through the excitation coil 34.
  • the overlap area between the stator pole shoes 31, 32 and the rotor pole shoes 37, 38 takes on as a function of the angle of rotation , this dependence being a function of the slope of the boundary surface 41.
  • the magnetic resistance of the present magnetic circuit changes with the angle of rotation and it can be shown that the angle of rotation of the rotor 29 loaded with the spring torque of the spring 14 can be changed by changing the current through the excitation coil 34, for example over an angle of rotation of 90 ° a largely linear dependence of the twist angle on the current strength can be achieved.
  • the pin 6 of the crank arm is held axially displaceably and rotatably in a bore 42 of the rotor 29.
  • FIGS. 6 and 7 corresponds essentially to the configuration explained with reference to FIGS. 4 and 5 with respect to the stator structure, whereas the rotor 43 in turn corresponds to the rotor according to the embodiments of FIGS. 1 to 3, ie two radial magnetized, hollow cylinder segment-like permanent magnets 44, 45 carries on its circumference.
  • the function also corresponds to that described at the beginning. 4 to 7 entirely on one side of the drive has the advantage that the upper part of the pump nozzle on the side opposite the excitation coil 34 can be brought close to the drive camshaft.
  • stator 46 of which is characterized by a particularly compact and mechanically stable structure.
  • the stator 46 which consists of a laminated core, completely encompasses the rotor 47, the excitation coil 48 consisting of two mechanically separate halves 48a, 48b which are seated on two web regions 49, 50 of the stator 46 which are inclined at an obtuse angle.
  • the coil halves 48a, 48b thus so to speak nestle against the rotor 47, which results in the compact structure.
  • an additional web 146 is provided between the web regions 49, 50 carrying the coil halves 48a, 48b, which magnetically represents a shunt.
  • the web 146 is designed with a large cross-sectional constriction 246, in the area of which the material of the stator 46 already saturates at the operating field strengths.
  • Another constriction 346 of this type is provided on the stator 46 opposite the excitation coil 48.
  • the sheets of the stator 46 are alternately overlapped in the corner areas 446 shown in dotted lines, so that a simple pushing of the coil halves 48a, 48b onto the web areas 49, 50 is possible during assembly.
  • the rotor 47 is similar to the rotor 43 of the embodiment according to FIGS. 6 and 7, but here a resistance sensor is provided for the feedback of the angle of rotation of the rotor 43.
  • a resistance sensor is provided for the feedback of the angle of rotation of the rotor 43.
  • a grinder 55 with two spring wiper arms 56, 57, which are electrically connected to one another or are formed in one piece, is assigned to these resistance tracks and is attached to the rotor 47, for example by means of a clamping screw 58 (FIG. 10).
  • the wiper arms 56, 57 rest resiliently on the resistance tracks 52, 53.
  • the ends of the resistor tracks 52, 53 which are not connected to one another, can each be connected to a voltage source via a film-like trimming resistor (not shown) provided on the upper side of the insulating carrier, so that the voltage on the grinder 55 is a measure of the angle of rotation of the Represents rotor 47.
  • a flexible electrical connection line (not shown) for the grinder 55 must be led through the housing of the drive to the outside.
  • An opening 59 can be provided in the housing cover 51, which is opposite the adjustment resistors already mentioned. Through this opening, a change in the adjustment resistances, ie an adjustment of the transmitter to the respective pump nozzle, is possible by means of vaporization by means of a laser. It is understood that feedback of the angle of rotation can in principle also take place with a single resistance track and a wiper arm.
  • the sensor shown can be used in the same way in the other embodiments of the invention described here.
  • FIG. 11 An embodiment is described in FIG. 11, each of which has a drive for the quantity actuator or for adjusting the start of injection.
  • a rotor 60 is also present here, to which a stator 61 is assigned.
  • the pin 6 of the crank arm 5 engages on the rotor 60.
  • a second drive is provided below this first drive and has a rotor 62 and a stator 63. Both drives can be designed according to one of the constructions described above, but a helical groove 64 is formed in the jacket of the rotor 62, in which the hook-like part 65 of a separating sleeve 66 engages, which in turn is connected to a control sleeve 67.
  • a rotation of the rotor 62 causes an axial displacement of the hook-like part 65 engaging in the groove 64 and ultimately an axial displacement of the control sleeve 67.
  • the excitation coil 68 of the second drive can be controlled via a schematically shown electronic control device 69.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP89890086A 1988-04-08 1989-03-29 Elektromechanischer Antrieb für Stellglieder von Pumpedüsen Expired - Lifetime EP0336922B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89890086T ATE65113T1 (de) 1988-04-08 1989-03-29 Elektromechanischer antrieb fuer stellglieder von pumpeduesen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3811844A DE3811844C1 (enrdf_load_stackoverflow) 1988-04-08 1988-04-08
DE3811844 1988-04-08

Publications (2)

Publication Number Publication Date
EP0336922A1 EP0336922A1 (de) 1989-10-11
EP0336922B1 true EP0336922B1 (de) 1991-07-10

Family

ID=6351640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89890086A Expired - Lifetime EP0336922B1 (de) 1988-04-08 1989-03-29 Elektromechanischer Antrieb für Stellglieder von Pumpedüsen

Country Status (4)

Country Link
EP (1) EP0336922B1 (enrdf_load_stackoverflow)
AT (1) ATE65113T1 (enrdf_load_stackoverflow)
DE (2) DE3811844C1 (enrdf_load_stackoverflow)
ES (1) ES2024073B3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859622A1 (de) 1998-12-23 2000-07-06 Braun Gmbh Antriebseinrichtung für oszillierende elektrische Produkte des persönlichen Bedarfs, insbesondere Trockenrasierer
CN106053713B (zh) * 2016-07-12 2017-12-29 上海化工研究院有限公司 一种用于气雾剂性能检测过程的电控定量释放装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2845139A1 (de) * 1978-10-17 1980-04-30 Bosch Gmbh Robert Regeleinrichtung fuer eine kraftstoffeinspritzpumpe
AT372502B (de) * 1981-02-02 1983-10-25 Friedmann & Maier Ag Kraftstoffeinspritzpumpe fuer brennkraftmaschinen, insbesondere dieselmotoren
DE3337590A1 (de) * 1983-10-15 1985-04-25 Robert Bosch Gmbh, 7000 Stuttgart Elektrischer stellmotor
ATE35567T1 (de) * 1984-04-30 1988-07-15 Voest Alpine Friedmann Einspritzpumpe fuer brennkraftmaschinen.
GB2189846B (en) * 1986-04-28 1989-11-29 Diesel Kiki Co Fuel injection pump

Also Published As

Publication number Publication date
ATE65113T1 (de) 1991-07-15
EP0336922A1 (de) 1989-10-11
ES2024073B3 (es) 1992-02-16
DE3811844C1 (enrdf_load_stackoverflow) 1989-12-14
DE58900162D1 (de) 1991-08-14

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