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EP0643411B1 - Elektromagnetische Steuervorrichtung für einen elektrischen Startmotors von internen Verbrennungsmotoren - Google Patents

Elektromagnetische Steuervorrichtung für einen elektrischen Startmotors von internen Verbrennungsmotoren Download PDF

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Publication number
EP0643411B1
EP0643411B1 EP94111691A EP94111691A EP0643411B1 EP 0643411 B1 EP0643411 B1 EP 0643411B1 EP 94111691 A EP94111691 A EP 94111691A EP 94111691 A EP94111691 A EP 94111691A EP 0643411 B1 EP0643411 B1 EP 0643411B1
Authority
EP
European Patent Office
Prior art keywords
control member
core
head
movable core
starter motor
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
EP94111691A
Other languages
English (en)
French (fr)
Other versions
EP0643411A1 (de
Inventor
Giuseppe Nicolini
Giuseppe Pedani
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.)
Denso Manufacturing Italia SpA
Original Assignee
Magneti Marelli Manufacturing SpA
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 Magneti Marelli Manufacturing SpA filed Critical Magneti Marelli Manufacturing SpA
Publication of EP0643411A1 publication Critical patent/EP0643411A1/de
Application granted granted Critical
Publication of EP0643411B1 publication Critical patent/EP0643411B1/de
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
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • 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
    • F02N15/067—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 comprising an electro-magnetically actuated lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/66—Driving arrangements between movable part of magnetic circuit and contact with lost motion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles

Definitions

  • the present invention relates to an electromagnetic control device for an electric starter motor for internal combustion engines of the kind defined in the preamble of claim 1.
  • Such electromagnetic control devices are widely used in vehicles for starting internal combustion engines.
  • FR-A-2 571 783 discloses a device of this kind, in which the movable core and the associated control member are coupled with each other by means of a pair of springs interposed therebetween.
  • the said control member is connected to one end of a transmission lever having a central aperture surrounding with a predetermined play a fixed fulcrum.
  • the other end of said lever is connected to a freewheel-pinion assembly displaceable along the shaft of the starter motor.
  • the arrangement is such that when the control solenoid is energised, the movable core moves from its rest position together with the said control member for an initial stroke in which the said lever rotates about its lower end, until said lever positively engages the associated fulcrum pin.
  • the object of the invention is to produce an improved electromagnetic device of the previously defined kind.
  • a starter motor conventionally consisting of a casing 102, inside which is arranged the inductor winding 104, and of a rotor 106 substantially comprising a pack of sheets 108, in which are disposed the armature winding, a commutator 110 and a shaft 112, concentric with the casing 102 and secured between two supports C and C' such that it is free to rotate is indicated 100.
  • the part of the shaft 112 in correspondence with the support C has a helical gearing 114 which engages the hub 116 of a free wheel clutch 118 which can drive a toothed pinion 120.
  • An electromagnetic control device 2 is associated with the starter motor 100.
  • the electromagnetic device 2 When the electromagnetic device 2 is excited, it urges the free wheel 118 towards the ring gear (fly wheel) 122 of an internal combustion engine (not illustrated) and closes a switch which supplies the starter motor; the pinion 120 meshes with the ring gear 122 and rotates it.
  • the helical gearing is in the opposite direction to the sense of rotation of the rotor 106 and thus in the opposite direction to the rotation of the shaft 112 which is integral therewith, such that, when the pinion 120 transmits torque to the ring gear 122, it tends to "unscrew” the hub 116 from the helical gearing 114 of the shaft 112; the pinion 120 presses against the shoulder 124 and thus maintains the meshing with the ring gear (fly wheel) 122 of the combustion engine.
  • the electromagnetic device 2 comprises an electromagnet 4 with a winding 6.
  • the winding 6 is housed in a coil 8 comprising a tubular core 12.
  • the tubular casing 16 surrounds the winding 6 and the coil 8.
  • the casing 16 has an end part 16a of reduced diameter, coaxial with and adjacent the tubular core 12 of the coil 8, in which a movable core 22 can slide axially.
  • the movable core 22 has axially opposite ends indicated 22a and 22b.
  • the end 22a of the movable core 22 is flared and defines externally a widened section 24 defining a shoulder surface 26.
  • a spring 28, interposed between the shoulder surface 26 and the casing 16, is disposed about the core 22.
  • the movable core 22 has a central axial through-hole 30. Close to the end 22b, the hole 30 leads into an axial cavity 34 of larger diameter which is closed by a transverse disc 32. A shoulder surface 36 is defined in the cavity. A control member 38, of which the axially opposite ends are indicated 38a, 38b, can slide axially inside the hole 30 in the cavity 34. At the end 38b, the control member has a head 40, with a widened cross-section, which can slide in the cavity 34 between the shoulder surface 36 and the disc 32.
  • the distance between the shoulder surface 36 and the disc 32, which constitute stop surfaces for the head 40, is larger than the dimensions, in the axial direction of this head, such that the head is axially movable in the cavity 34 with predetermined relative axial clearance, indicated P in the drawings.
  • the control member 38 has a transverse aperture 42 in which one end of the lever transmission member L is engaged.
  • a fixed core 44 Integral with the coil 8 and the casing 16 is a fixed core 44 having a central cylindrical portion 44a engaged in one end of the core 12 of the coil, a ring gear or flange 44b and an end 44c tapered frustoconically and turned towards the movable core 22.
  • the fixed core 44 has an axial through-hole 46 in which a rod 48 can slide axially.
  • the rod 48 comprises respective heads 50 and 52 at both ends.
  • a metal plate 54 externally of the hole 46, is slidably mounted on the rod 48, which extends through a central aperture 56 therein.
  • the plate 54 acts as the movable contact of a switch generally indicated 55.
  • a helical spring 60 disposed about the rod and tending to force the plate 54 against the head 52, is interposed between the plate 54 and a bush 58 carried by the rod 48.
  • a cup-shaped element 62 made of electrical insulating material is adjacent the fixed core 44 and is blocked in a turned edge 16b of the casing 16.
  • the base of the element 62 has two parallel holes 64 in which are inserted two screws 65 and 66, the heads 65a and 66a of which extend in the space 67 between the element 62 and the fixed core 44, such that they face the ends of the movable contact 54.
  • the heads 65a and 66a of the screws 65 and 66 act as fixed contacts.
  • the portion of the rod of the screw 65 which is outside the cup element 62 is electrically connected to the battery (not illustrated); the similar portion of the screw 66 is electrically connected to the windings of the starter motor.
  • a helical spring 70 which, by means of its head 52, urges the movable contact 54 against the fixed core 44, is interposed between the head 52 of the rod 48 and the element 62.
  • Figure 1 shows the rest state of the device.
  • the head 40 of the control member 38 abuts the disc 32 which closes the cavity 30.
  • the movable core 22 moves toward the fixed core 44, performing an initial stroke of predetermined length without engaging or entraining the control member 38.
  • the shoulder surface 36 of the control member 38 is forced against the head 40, as shown in Figure 2, the movable core 22 entrains on its travel the control member 38 and consequently actuates the lever transmission member L, which advances and couples the toothed pinion 120 of Figure 1 with the ring gear (fly wheel) 122 of the internal combustion engine.
  • the disc 32 which is integral with the movable core 22, engages and forces the rod 48 in correspondence with its head 50, compressing the spring 70 and attaining the operative position in which the movable contact 54 touches and connects the fixed contacts 65a and 66a to one another, in effect closing the switch 55, to enable current to be supplied to the electric starter motor which starts to rotate and drives the internal combustion engine.
  • Figure 5 illustrates a variant of embodiment of the invention in which parts which are identical or substantially equivalent to parts in the preceding drawings bear the same reference numbers.
  • the cavity 30, in the movable core 22 and turned towards the lever L is blind and has a base 82.
  • the head 40 of the control member 38 can slide in the cavity 30 between this base 82 and a stop ring 84 secured adjacent the mouth of the cavity 30.
  • the control member 38 extends with radial clearance through this ring 84.
  • Figure 6 illustrates a variant of the solution shown in Figure 5.
  • the device illustrated in Figure 6 differs from that illustrated in Figure 5 in that, during the movement of the movable core 22, the control member 38 can assume positions which are not coaxial with the latter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (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)
  • Valve Device For Special Equipments (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (7)

  1. Elektromagnetische Steuervorrichtung für den elektrischen Anlassermotor von Verbrennungsmotoren, wobei die Steuervorrichtung einen Elektromagnet (4) enthält, der eine Wicklung (6) besitzt, in der ein bewegbarer Kern (22) angeordnet ist, dem eine Rückstelleinrichtung (28) zugeordnet ist, die versucht, den bewegbaren Kern in einer axialen Ruhestellung zu halten, wobei der bewegbare Kern (22) durch die Erregung der Wicklung (6) zu einer axialen Arbeitsstellung bewegt werden kann, in der er einen Schalter (55; 54, 65a, 66a) schließt, der die Zufuhr des Stroms zum Anlassermotor steuert; wobei der Kern (22) an der dem Schalter (55) gegenüberliegenden Seite einem Steuerelement (38) zugeordnet ist, von dem ein Ende so ausgebildet ist, daß es mit einem Hebelübertragungselement (L) gekuppelt werden kann, um ein vom Anlassermotor gesteuertes Element mit einem entsprechenden Element eines Verbrennungsmotors zu kuppeln;
       wobei das Steuerelement (38) zum bewegbaren Kern (22) verschiebbar ist; dadurch gekennzeichnet, daß das Steuerelement (38) mit dem bewegbaren Kern (22) mit einem vorgegebenen relativen Axialspiel (P) zwischen den beiden Bauelementen gekoppelt ist, so daß dann, wenn sich der bewegbare Kern (22) aus der Ruhestellung in die Arbeitsstellung und umgekehrt bewegt, der Kern (22) einen Anfangshub von vorgegebener Länge ausführt, bevor er in das Steuerelement (38) eingreift und dieses mitnimmt.
  2. Elektromagnetische Vorrichtung gemäß Anspruch 1, wobei der bewegbare Kern (22) an der dem Schalter (55; 54, 65a, 66a) gegenüberliegenden Seite einen axialen Hohlraum (30, 34) besitzt, in dem das Steuerelement (38) verschiebbar angebracht ist.
  3. Elektromagnetische Vorrichtung gemäß Anspruch 2, wobei jener Teil des Steuerelements (38), der in den Hohlraum (34) des Kerns (22) verläuft, einen Kopf (40) mit einem vergrößerten Querschnitt besitzt, der so ausgebildet ist, daß er im Hohlraum (34) zwischen zwei querliegenden Anschlagflächen (32, 36; 82, 84) gleiten kann, deren Abstand größer als die Abmessung dieses Kopfs (40) in axialer Richtung ist, so daß der Kopf (40) im Hohlraum mit dem oben erwähnten relativen Axialspiel (P) axial bewegbar ist.
  4. Vorrichtung gemäß Anspruch 3, wobei die Fläche (40b) des Kopfes (40) des Steuerelements (38) eine kugelförmige Kappe ist, deren Achse mit der Achse des Steuerelements (38) übereinstimmt.
  5. Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, daß jene Fläche (82) des Hohlraums (30), die dem Kopf (40) des Steuerelements (38) gegenüberliegt, ein kugelförmiger Ring ist, der eine Achse besitzt, die mit der Achse des Steuerelements (38) übereinstimmt.
  6. Vorrichtung gemäß Anspruch 4 und 5, wobei die kugelförmigen Flächen (40a, 40b) über eine Ringfläche (40c) verbunden sind, die eine Achse besitzt, die mit der Achse der Flächen (40a, 40b) übereinstimmt.
  7. Vorrichtung gemäß Anspruch 4, 5, 6, wobei eine der Anschlagflächen (84) von einem Anschlagring (84) gebildet wird, der einen trapezförmigen Querschnitt besitzt.
EP94111691A 1993-09-14 1994-07-27 Elektromagnetische Steuervorrichtung für einen elektrischen Startmotors von internen Verbrennungsmotoren Expired - Lifetime EP0643411B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930669 1993-09-14
ITTO930669A IT1261588B (it) 1993-09-14 1993-09-14 Dispositivo elettromagnetico di comando per un motore elettrico d'avviamento per motori a combustione interna.

Publications (2)

Publication Number Publication Date
EP0643411A1 EP0643411A1 (de) 1995-03-15
EP0643411B1 true EP0643411B1 (de) 1998-03-18

Family

ID=11411728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111691A Expired - Lifetime EP0643411B1 (de) 1993-09-14 1994-07-27 Elektromagnetische Steuervorrichtung für einen elektrischen Startmotors von internen Verbrennungsmotoren

Country Status (4)

Country Link
EP (1) EP0643411B1 (de)
DE (1) DE69409051T2 (de)
ES (1) ES2114100T3 (de)
IT (1) IT1261588B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737911B1 (fr) * 1995-08-14 1997-09-12 Valeo Equip Electr Moteur Contacteur de demarreur de vehicule automobile comportant des moyens perfectionnes d'etancheite et demarreur equipe d'un tel contacteur
FR2783091B1 (fr) * 1998-09-03 2000-10-13 Valeo Equip Electr Moteur Contacteur de demarreur a noyau mobile comportant une rondelle rapportee de fermeture
FR2783090B1 (fr) 1998-09-03 2000-10-13 Valeo Equip Electr Moteur Contacteur de demarreur a noyau mobile comportant une coupelle rapportee de fermeture
JP2004068601A (ja) 2002-08-01 2004-03-04 Hitachi Ltd ソレノイドおよびそれを用いたスタータ
CN103426684B (zh) * 2012-05-21 2017-02-08 博世汽车部件(长沙)有限公司 电磁开关、其制造方法及车辆起动机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1191276A (en) * 1966-09-09 1970-05-13 Lucas Industries Ltd Solenoids for use in Engine Starting Mechanisms
FR2571783B1 (fr) * 1984-10-16 1988-11-25 Paris & Du Rhone Dispositif de commande d'engrenement du pignon du lanceur pour un demarreur de moteur a combustion interne
JPH0643500Y2 (ja) * 1987-06-15 1994-11-14 三菱電機株式会社 スタ−タモ−タのソレノイドスイッチ
JPH06100169B2 (ja) * 1988-12-19 1994-12-12 三菱電機株式会社 ピニオンシフト装置

Also Published As

Publication number Publication date
ITTO930669A1 (it) 1995-03-14
ES2114100T3 (es) 1998-05-16
IT1261588B (it) 1996-05-23
DE69409051D1 (de) 1998-04-23
EP0643411A1 (de) 1995-03-15
ITTO930669A0 (it) 1993-09-14
DE69409051T2 (de) 1998-07-09

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