EP0636786B1 - Starter device for an internal combustion engine for motor vehicles - Google Patents

Starter device for an internal combustion engine for motor vehicles Download PDF

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Publication number
EP0636786B1
EP0636786B1 EP94109473A EP94109473A EP0636786B1 EP 0636786 B1 EP0636786 B1 EP 0636786B1 EP 94109473 A EP94109473 A EP 94109473A EP 94109473 A EP94109473 A EP 94109473A EP 0636786 B1 EP0636786 B1 EP 0636786B1
Authority
EP
European Patent Office
Prior art keywords
core
electromagnet
pinion
appendage
rocker arm
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
EP94109473A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0636786A1 (en
Inventor
Giancarlo Fasola
Giovanni Cerizza
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.)
Industrie Magneti Marelli SRL
Marelli Europe 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 EP0636786A1 publication Critical patent/EP0636786A1/en
Application granted granted Critical
Publication of EP0636786B1 publication Critical patent/EP0636786B1/en
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
    • 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

Definitions

  • the present invention relates to a starter device for an internal combustion engine for a motor vehicle.
  • the invention relates to a starter device of the type comprising:
  • the transmission between the core of the electromagnet and the pinion is generally of non-rigid type.
  • the rocker arm is coupled with clearance to the drive appendage of the electromagnet. This clearance is provided so as to allow the movable core (which is in the actuation position (with excited electromagnet)), when the electromagnet is de-energised, to travel over part of a stroke returning it to the rest position in which it is free from the thrust of the arm, such that the switch opens reliably and the motor is not supplied.
  • the transmission between the core of the electromagnet and the pinion is not rigid and may comprise one or more springs, provided, for example, so as to facilitate the meshing of the pinion and the toothed rim of the combustion engine if it is sticks at the front.
  • the rocker arm itself is frequently resiliently flexible.
  • European Patent Application No. EP-A-0 520 957 in the name of the same applicants proposes producing the aforementioned rocker arm with a shaped profile such that, all other conditions being equal, the initial dead travel is less than it would be with an arm having a substantially straight profile.
  • the second end of the rocker arm is deflected in correspondence with the core drive member or appendage.
  • this solution has a disadvantage.
  • this configuration can cause a deviation of the movable core of the electromagnet which, in the rest position can be subject to a non-axial reaction, owing to the thrust of the core return spring. As a result, the core is urged in a preferred direction.
  • the vibrations induced by the combustion engine will wear the movable core and the movable core guide at the points of contact. Since it is not uniformly distributed axially, this wear can cause the movable core to stick against its guide when the starter is driven, thus causing the starter to fail.
  • the object of the present invention is to produce a starter device which enables the above disadvantage to be overcome satisfactorily.
  • the starter device for an internal combustion engine for motor vehicles comprises a support casing 1 which, in known arrangement, accommodates an electric drive motor 2 and an electromagnet 3.
  • an overrunning clutch (free wheel) 4 is mounted on the shaft of the electric motor 2.
  • a sleeve 5 is mounted so as to move on the shaft of the motor 2 together with the joint 4.
  • a pinion 6, which can move axially along a smooth end portion 2a of the shaft of the electric motor 2, is connected to the joint 4.
  • the pinion 6 can in particular move between a retracted rest position and an advanced operating position in which it can mesh with the teeth of a flywheel 7 of the internal combustion engine (not illustrated).
  • a rocker arm pivoting about a fulcrum 9 and acting as a transmission member between the sleeve 5, which acts as a member for controlling the translation of the pinion 6, and the core of the electromagnet 3, is indicated 8.
  • the arm 8 which is substantially Y-shaped, is of the leaf spring type and comprises two coupled metal sheets, with a lower end 8a which engages in suitable seats arranged at the sides of the sleeve 5.
  • the second end of the arm 8, indicated 8b, is coupled to the movable core 10 of the electromagnet 3, in a manner which will now be described.
  • the electromagnet 3 comprises a movable core 10 which can move axially inside a control solenoid or winding 11 carried by a coil 12.
  • the core 10 has an axial extension 13 about which a washer 14 is secured.
  • the extension 13 of the core 10 terminates in an appendage 15 which has a slot 16 in which the second end 8b of the rocker arm 8 extends.
  • a helical spring 17, which reacts against the washer 14, tends to maintain the core 10 in the position illustrated, in which it partially extends outside the control solenoid or winding 11, and in which the upper end 8b of the arm 8 rests against the righthand side (as observed in the drawing) of the slot 16. This end of the arm is thus at a given spacing from the lefthand side (as observed in the drawing) of the slot 16.
  • the arm 8 consists of two coupled metal sheets. However, at their second ends 8b, these two sheets are shaped differently with respect to the prior art described above.
  • the half-lever which is furthest away from the core 10 is shaped similarly to that which has been described with reference to the prior art and is thus deflected in the direction of the drive member 15 of the core 10.
  • the half-lever positioned closer the core 10, shown in Figure 3 has an arcuate end portion with the concave part turned towards the core 10.
  • This concavity can advantageously be dimensioned such that, when the arm 8 is in the rest position, the non-axial reaction with respect to the core 10 is zero.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP94109473A 1993-07-28 1994-06-20 Starter device for an internal combustion engine for motor vehicles Expired - Lifetime EP0636786B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930564 1993-07-28
ITTO930564A IT1260673B (it) 1993-07-28 1993-07-28 Dispositivo di avviamento per un motore a combustione interna per autoveicoli.

Publications (2)

Publication Number Publication Date
EP0636786A1 EP0636786A1 (en) 1995-02-01
EP0636786B1 true EP0636786B1 (en) 1996-10-09

Family

ID=11411652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109473A Expired - Lifetime EP0636786B1 (en) 1993-07-28 1994-06-20 Starter device for an internal combustion engine for motor vehicles

Country Status (4)

Country Link
EP (1) EP0636786B1 (it)
DE (1) DE69400689T2 (it)
ES (1) ES2092846T3 (it)
IT (1) IT1260673B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2872551B1 (fr) * 2004-06-30 2008-09-19 Valeo Equip Electr Moteur Demarreur electrique de vehicule automobile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177728A (en) * 1960-07-01 1965-04-13 Chrysler Corp Geared starter
IT1249933B (it) * 1991-06-25 1995-03-30 Magneti Marelli Spa Dispostitivo di avviamento per un motore a combustione interna per autoveicolo.

Also Published As

Publication number Publication date
ES2092846T3 (es) 1996-12-01
ITTO930564A1 (it) 1995-01-28
IT1260673B (it) 1996-04-22
DE69400689T2 (de) 1997-02-20
DE69400689D1 (de) 1996-11-14
ITTO930564A0 (it) 1993-07-28
EP0636786A1 (en) 1995-02-01

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