EP0012046B1 - Elektrischer Anlasser für Brennkraftmaschinen, insbesondere für Kraftfahrzeuge - Google Patents

Elektrischer Anlasser für Brennkraftmaschinen, insbesondere für Kraftfahrzeuge Download PDF

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Publication number
EP0012046B1
EP0012046B1 EP19790400763 EP79400763A EP0012046B1 EP 0012046 B1 EP0012046 B1 EP 0012046B1 EP 19790400763 EP19790400763 EP 19790400763 EP 79400763 A EP79400763 A EP 79400763A EP 0012046 B1 EP0012046 B1 EP 0012046B1
Authority
EP
European Patent Office
Prior art keywords
starter
engagement element
braking device
magnetic
movable armature
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
Application number
EP19790400763
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English (en)
French (fr)
Other versions
EP0012046A1 (de
Inventor
François Femenia
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.)
Ducellier et Cie
Original Assignee
Ducellier et Cie
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 Ducellier et Cie filed Critical Ducellier et Cie
Publication of EP0012046A1 publication Critical patent/EP0012046A1/de
Application granted granted Critical
Publication of EP0012046B1 publication Critical patent/EP0012046B1/de
Expired 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
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/066—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter being of the coaxial type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors

Definitions

  • the present invention relates to an electric starter for internal combustion engines, in particular for motor vehicles, starter of the type comprising an electromagnetic braking device consisting of a fixed inductor circuit supplied simultaneously with the electric circuit of the starter and of a fixed movable armature element to a meshing element, the connection of the meshing element and the starter armature shaft being ensured by helical splines in such a way that said meshing element can perform relative to the shaft induces a movement of axial displacement and rotation between a rest position and a working position in which, during operation, the pinion of the engagement element meshes with the ring gear of the starter motor.
  • Such an electromagnetic braking device is known, in particular from FR - A - 2 257 023, device in which the movable armature element is in the form of a disc carrying four arms forming salient poles which cooperate with two pole pieces fixed in a magnetic carcass, this carcass being held in the starter support.
  • An inductor winding supplied simultaneously with the electric circuit of the starter, surrounds the fixed pole pieces so as to create a magnetic braking field.
  • the disadvantage of such a device is that the number of arms, forming the salient poles, being low kinetic energy, created by the angular displacement between the rest position of the engagement element and the position of least reluctance of the magnetic braking circuit, reaches a value which does not allow effective braking of the engagement element and that in the working position, that is to say when the pinion is engaged in the ring gear, the magnetic force of axial support, in this working position can be very low if the disc, relative to the axis of the pole pieces, is angularly between two arms forming the salient poles.
  • the object of the invention is to remedy this drawback and for this purpose relates to an electric starter of the type comprising an electromagnetic braking device consisting of a fixed inductor circuit, supplied simultaneously with the electric circuit of the starter and of a movable armature element fixed to a meshing element, characterized in that the movable armature element comprises a peripheral part folded down parallel to the axis of rotation of said armature element, which peripheral part comprises a first cylindrical zone made up of polar teeth capable of producing braking magnetic rotation allowing axial movement of the engagement element and a second cylindrical zone forming a continuous ring of material, so that the engagement element is held axially in its working position as long as the starter is powered.
  • the polar teeth of the movable armature have a width corresponding to a valuable polar arc such that the magnetic braking device has an angular position of least reluctance, the number of polar teeth being judiciously determined so that the angle traveled between the rest position and the position of least reluctance is as low as possible so that the value of the kinetic energy is less than the magnetic braking force.
  • the starter comprises, in a known manner, a support 1 (see FIG. 1), an armature shaft 2 journalling, by its meshing side, in a bearing 3 integral with the support 1, an armature 4 mounted on the shaft 2, a meshing element 5, comprising a pinion 5a and a sleeve 5b which, connected to the pinion 5a, by means of a free wheel 5c, is capable of sliding by being screwed onto the shaft 2, by means of helical grooves 2a.
  • a stop 6, on which rests, at the end of the stroke, the engagement element 5, is disposed towards the end of the shaft 2.
  • the restoring force exerted by the spring 10 is transmitted to the meshing element 5 by means of the part 11 rotatably mounted on a bearing 9, so as to transmit said force to the movable element induced 7.
  • the movable armature element 7 comprises a peripheral part folded down parallel to the axis of rotation of said element, which peripheral part comprises a first cylindrical zone 7a formed by polar teeth 7b (see 1 and 3) capable of producing a magnetic braking in rotation allowing an axial displacement of the meshing element from the rest position to the working position, by means of the helical grooves 2a.
  • the peripheral part comprises a second cylindrical zone 7c (see fig. 1) forming a continuous ring of material, so that the engagement element 5 is held axially in the working position as long as the starter is supplied, and consequently the field winding 13.
  • the meshing element 5 (see fig. 2) is immobilized in its race by the toothed crown 15 of the motor, that is to say if the teeth of the pinions 5a abut against those of the crown 15 the element d meshing 5 secured to the armature shaft 2, by means of the helical grooves 2a, drives the pinion 5a in rotation, the torque developed by the armature being greater than the magnetic braking force.
  • the pinion 5a rotates until it enters the crown 15 by the action of the movable armature element 7, which ensures the centering of the second peripheral zone 7c, forming a continuous crown of material, in the axis pole pieces 12 and 12a.
  • the purpose of the clearance J is to avoid rapid wear, by friction, of the faces in contact with the stop and the pinion, the toothed ring driving the pinion at a speed of rotation considerably greater than the speed of rotation of the armature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Braking Arrangements (AREA)

Claims (2)

1. Elektrischer Anlasser für Brennkraftmaschinen, insbesondere von Kraftfahrzeugen, umfassend eine elektromagnetische Bremsvorrichtung mit einer feststehenden Feldwicklung (12, 12a, 13, 14), die gleichzeitig mit dem Stromkreis des Anlassers gespeist wird, und einem beweglichen Läuferelement (7), daß an einem Eingriffselement (5) befestigt ist, wobei die elektromagnetische Bremsvorrichtung einerseits eine Axialverstellung des Eingriffselementes (5) zwischen einer Ruhestellung und einer Arbeitsstellung bewirkt und andererseits das Eingriffselement (5) in seiner Arbeitsstellung festhält, solange der Stromkreis des Anlassers gespeist wird, dadurch gekennzeichnet, daß bewegliche Läuferelement (7) einen parallel zu seiner Drehachse umgebogenen Umfangsabschnitt aufweist, der einen ersten zylindrischen Abschnitt (7a) bestehend aus Polzähnen (7b) zur Erzeugung eines magnetischen Bremsdrehmomentes, welches eine Axialverstellung des Eingriffselements (5) ermöglicht, und einen zweiten zylindrischen Abschnitt (7c) in Form eines durchgehenden Kranzes umfaßt derart, daß das Eingriffselement (5) axial in seiner Arbeitsstellung gehalten wird, solange der Anlasser gespeist wird.
2. Anlasser nach Anspruch 1, dadurch gekennzeichnet, daß die Polzähne (7b) des beweglichen Läuferelementes (7) eine Breite aufweisen, die einem Polbogen mit einem solchen Wert entspricht, daß die elektromagnetische Bremsvorrichtung eine Winkelstellung der geringsten Reluktanz einnimmt, wobei die Anzahl der Polzähne (7b) zweckmäßigerweise so bestimmt ist, daß der zwischen der Ruhestellung und der Stellung mit der geringsten Reluktanz durchlaufene Winkel so gering wie möglich ist, damit der Wert der kinetischen Energie geringer als die magnetische Bremskraft ist.
EP19790400763 1978-11-29 1979-10-18 Elektrischer Anlasser für Brennkraftmaschinen, insbesondere für Kraftfahrzeuge Expired EP0012046B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7833657A FR2442973A1 (fr) 1978-11-29 1978-11-29 Perfectionnement aux demarreurs electriques pour moteurs a combustion interne notamment de vehicules automobiles
FR7833657 1978-11-29

Publications (2)

Publication Number Publication Date
EP0012046A1 EP0012046A1 (de) 1980-06-11
EP0012046B1 true EP0012046B1 (de) 1981-04-29

Family

ID=9215483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790400763 Expired EP0012046B1 (de) 1978-11-29 1979-10-18 Elektrischer Anlasser für Brennkraftmaschinen, insbesondere für Kraftfahrzeuge

Country Status (3)

Country Link
EP (1) EP0012046B1 (de)
DE (1) DE2960318D1 (de)
FR (1) FR2442973A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841941B1 (fr) * 2002-07-03 2004-09-24 Valeo Equip Electr Moteur Demarreur a lanceur perfectionne pour un moteur a combustion interne
FR2843782B1 (fr) * 2002-07-03 2006-01-27 Valeo Equip Electr Moteur Systeme de demarrage a organe de controle separe du demarreur
FR2858366B1 (fr) * 2003-07-28 2007-09-14 Valeo Equip Electr Moteur Systeme de demarrage a poulie et courroie pour un moteur thermique de vehicule automobile
CN104500305A (zh) * 2014-10-18 2015-04-08 锦州汉拿电机有限公司 反转复位式无电磁开关起动机
CN104500304A (zh) * 2014-10-18 2015-04-08 锦州汉拿电机有限公司 弹簧复位式无电磁开关起动机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB818595A (en) * 1956-05-14 1959-08-19 Simms Motor Units Ltd Improvements in or relating to coupling means for starter-motors
US3496759A (en) * 1968-06-06 1970-02-24 Bendix Corp Starter drive with friction advance and inertia release
US3572133A (en) * 1969-04-04 1971-03-23 Bendix Corp Starter drive with positive advance and inertia release
FR2207529A5 (de) * 1972-11-17 1974-06-14 Paris & Du Rhone

Also Published As

Publication number Publication date
FR2442973A1 (fr) 1980-06-27
DE2960318D1 (en) 1981-08-06
FR2442973B1 (de) 1985-01-18
EP0012046A1 (de) 1980-06-11

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