EP0643411A1 - 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
EP0643411A1
EP0643411A1 EP94111691A EP94111691A EP0643411A1 EP 0643411 A1 EP0643411 A1 EP 0643411A1 EP 94111691 A EP94111691 A EP 94111691A EP 94111691 A EP94111691 A EP 94111691A EP 0643411 A1 EP0643411 A1 EP 0643411A1
Authority
EP
European Patent Office
Prior art keywords
control member
core
movable core
starter motor
head
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.)
Granted
Application number
EP94111691A
Other languages
English (en)
French (fr)
Other versions
EP0643411B1 (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
Industrie Magneti Marelli SRL
Magneti Marelli 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 Industrie Magneti Marelli SRL, Magneti Marelli SpA filed Critical Industrie Magneti Marelli SRL
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, comprising an electromagnet having a winding in which is disposed a movable core to which are associated return means tending to retain the core in an axial rest position, and which can be moved, by the excitation of this winding, towards an axial operative position in which it closes a switch which can control the supply of current to the starter motor; on the side opposite the switch, the core is associated with a control member, one end of which can be coupled to a lever transmission member in order to couple a member controlled by the starter motor to a corresponding member of an internal combustion engine.
  • Such electromagnetic control devices are widely used in vehicles for starting internal combustion engines.
  • the control member is integral with the movable core and has at the free end a wide axial opening in which one end of the lever transmission member is free to pivot with ample clearance.
  • this end of the lever member is located behind the edge of the axial aperture which is turned towards the switch.
  • the movable core moves from the rest position towards the switch, performing an initial stroke of predetermined length before engaging and entraining the lever transmission member.
  • the movable core closes the contact of the electric switch which supplies the starter motor; the latter starts to rotate, rotating the fly wheel of the internal combustion engine.
  • the end of the lever transmission member is situated behind the edge of the axial opening of the control member which is turned towards the opposite side to the switch.
  • the movable core is returned by the return means, in the direction opposite the preceding direction, performing an initial stroke of predetermined length, equal to the preceding stroke; before engaging the lever transmission member in order to uncouple the starter motor from the internal combustion engine, the electric switch opens as it is no longer pressed by the movable core, de-energising the starter motor.
  • the known device described above has the disadvantage that the need for relative axial clearance between the control member and the lever transmission member increases the size of the control member in the axial direction, with the consequent increase in the size of the electromagnetic device in the same direction.
  • the object of the invention is to produce an electromagnetic device enabling this disadvantage to be overcome.
  • this object is achieved by an electromagnetic device of the above-mentioned type, characterized in that the control member is slidably coupled to the movable core with a predetermined relative axial clearance between the two, such that, when the movable core moves from the rest position to the operative position, and vice versa, the core can perform an initial stroke of predetermined length before engaging and entraining the control member.
  • 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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve Device For Special Equipments (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
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 true EP0643411A1 (de) 1995-03-15
EP0643411B1 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)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631448A1 (de) * 1995-08-14 1997-02-20 Valeo Equip Electr Moteur Anlasserrelais für einen Kraftfahrzeuganlasser mit verbesserten Abdichtungsmitteln und mit einem solchen Anlasserrelais ausgerüsteter Anlasser
FR2783090A1 (fr) * 1998-09-03 2000-03-10 Valeo Equip Electr Moteur Contacteur de demarreur a noyau mobile comportant une coupelle rapportee de fermeture
FR2783091A1 (fr) * 1998-09-03 2000-03-10 Valeo Equip Electr Moteur Contacteur de demarreur a noyau mobile comportant une rondelle rapportee de fermeture
EP1387083A2 (de) * 2002-08-01 2004-02-04 Hitachi, Ltd. Solenoid-Stellantrieb und Anlasser, der diesen verwendet
WO2013174253A1 (zh) * 2012-05-21 2013-11-28 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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1548428A (de) * 1966-09-09 1968-12-06
FR2571783A1 (fr) * 1984-10-16 1986-04-18 Paris & Du Rhone Dispositif de commande d'engrenement du pignon du lanceur pour un demarreur de moteur a combustion interne
FR2616580A1 (fr) * 1987-06-15 1988-12-16 Mitsubishi Electric Corp Interrupteur a solenoide a utiliser dans un demarreur de moteur
EP0375378A1 (de) * 1988-12-19 1990-06-27 Mitsubishi Denki Kabushiki Kaisha Ritzeleinrückvorrichtung für Anlasser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1548428A (de) * 1966-09-09 1968-12-06
FR2571783A1 (fr) * 1984-10-16 1986-04-18 Paris & Du Rhone Dispositif de commande d'engrenement du pignon du lanceur pour un demarreur de moteur a combustion interne
FR2616580A1 (fr) * 1987-06-15 1988-12-16 Mitsubishi Electric Corp Interrupteur a solenoide a utiliser dans un demarreur de moteur
EP0375378A1 (de) * 1988-12-19 1990-06-27 Mitsubishi Denki Kabushiki Kaisha Ritzeleinrückvorrichtung für Anlasser

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631448A1 (de) * 1995-08-14 1997-02-20 Valeo Equip Electr Moteur Anlasserrelais für einen Kraftfahrzeuganlasser mit verbesserten Abdichtungsmitteln und mit einem solchen Anlasserrelais ausgerüsteter Anlasser
FR2783090A1 (fr) * 1998-09-03 2000-03-10 Valeo Equip Electr Moteur Contacteur de demarreur a noyau mobile comportant une coupelle rapportee de fermeture
FR2783091A1 (fr) * 1998-09-03 2000-03-10 Valeo Equip Electr Moteur Contacteur de demarreur a noyau mobile comportant une rondelle rapportee de fermeture
WO2000014759A1 (fr) * 1998-09-03 2000-03-16 Valeo Equipements Electriques Moteur Contacteur de demarreur a noyau mobile comportant une coupelle rapportee de fermeture
US6307454B1 (en) 1998-09-03 2001-10-23 Valeo Equipments Electriques Moteur Starting switch with mobile core comprising a directly mounted closure cup
EP1387083A2 (de) * 2002-08-01 2004-02-04 Hitachi, Ltd. Solenoid-Stellantrieb und Anlasser, der diesen verwendet
EP1387083A3 (de) * 2002-08-01 2006-11-02 Hitachi, Ltd. Solenoid-Stellantrieb und Anlasser, der diesen verwendet
US7199687B2 (en) 2002-08-01 2007-04-03 Hitachi, Ltd. Solenoid type drive and starter using the same
WO2013174253A1 (zh) * 2012-05-21 2013-11-28 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
CN103426684A (zh) * 2012-05-21 2013-12-04 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
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

Also Published As

Publication number Publication date
DE69409051D1 (de) 1998-04-23
ES2114100T3 (es) 1998-05-16
ITTO930669A0 (it) 1993-09-14
ITTO930669A1 (it) 1995-03-14
DE69409051T2 (de) 1998-07-09
EP0643411B1 (de) 1998-03-18
IT1261588B (it) 1996-05-23

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