US3572133A - Starter drive with positive advance and inertia release - Google Patents

Starter drive with positive advance and inertia release Download PDF

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Publication number
US3572133A
US3572133A US813455A US3572133DA US3572133A US 3572133 A US3572133 A US 3572133A US 813455 A US813455 A US 813455A US 3572133D A US3572133D A US 3572133DA US 3572133 A US3572133 A US 3572133A
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US
United States
Prior art keywords
drive
starter
advance
starter drive
pinion
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
US813455A
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English (en)
Inventor
Paul F Giometti
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Application granted granted Critical
Publication of US3572133A publication Critical patent/US3572133A/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
    • F02N15/066—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/13—Machine starters
    • Y10T74/131—Automatic

Definitions

  • a starter drive having position responsive advance assist means capable of preventing disengagement of the drive in the event of a false start.
  • the assist means comprise, in the preferred embodiment, an axially-movable electromagnetic brake with a non-rotating coil and magnet body. As the drive advances, an electrical contact for the coil slides along a conducting strip which terminates immediately before the drive reaches its fully advanced position de-energizing the brake and thereby releasing the advance assist.
  • the present invention relates to starter drives for internal combustion engines. It is known that a pinion of a starter drive may be advanced into engagement with the ring gear of an engine to be started by mounting the drive on a helical screw shaft and rotating the shaft at a faster rotational Velocity than the drive is rotated. It is also 'known that the rotation of the drive can be impeded by applying a retarding force in the form of rotational friction. When the frictional force is sufiicient for axially shifting the drive into engagement and preventing inadvertent disengagement, the frictional force can consume as much as 10% of the total power of the starting motor during cranking.
  • I employ a shiftable, non-rotatable electromagnetic brake, having a sliding electrical contact, to interconnect the shiftable drive portion and the starter housing to prevent drive rotation and facilitate drive advance.
  • a shiftable, non-rotatable electromagnetic brake having a sliding electrical contact
  • the sliding electrical contact moves off of an energized conducting strip permitting the brake to be de-energized thereby freeing the drive for rotation. It is believed that the braking forces are sufficient to prevent pinion rotation thereby gaining the advantages of the solenoid type of positive shift starter drive without requiring the power consuming solenoid to maintain the drive in engagement.
  • the shiftable drive portion which represents a preferred embodiment of my invention.
  • the shiftable drive portion is mounted in co-operative association with the helical screw shaft of the starter motor, not shown.
  • the shiftable drive portion 10 is comprised of a screw shaft sleeve 16 co-operatively engaging the screw shaft 12, the advance assist means 20, a unidirectional clutch means 22, the pinion 24 and the starter drive housing 26.
  • the shaft sleeve 16 is connected to the outer race 28 0f the clutch means 22 while the inner race 30 of the clutch means 22 is connected to the pinion 24 thus providing a unidirectional torque transmitting connection between the output shaft 12 of the starter motor, no shown, and the pinion 24.
  • the sleeve 16 and outer race 28 comprise the starter drive body.
  • the advance assist means is comprised of an electromagnetic brake means including a stationary magnet body 34, an electromagnetic coil means 36, an armature means 38 and current conducting means 40.
  • the magnet body 34 is slidingly connected to the starter drive housing 26 through flange 42 which slides in a slot 44 in the insulating block 54.
  • the current conducting means 40 is comprised of resilient contact member 48 and suitably insulated lead 50 which connects the resilient contact member 48 to the coil means 36.
  • the starter drive housing 26 includes a conducting strip 52 which is imbedded within insulated block 54 and is, therefore, insulated from the starter drive housing 26.
  • the resilient contact member 48 is in sliding contactive engagement with the conducting strip 52 for most of the axial travel distance of the shiftable drive portion 10.
  • conducting strip 52 is also energized causing current to flow in the coil means 36.
  • the armature means 38 could be eliminated and the clutch means 22 could include an armature portion. Because the magnet body is prevented from rotating and is clamped by electromagnetic force into contact with the armature means 38, the shaft sleeve 16, the clutch means 22 and the pinion 24 are prevented from rotating with the shaft 12, but are caused to axially translate on the shaft until the pinion 24- engages the ring gear 32.
  • the sliding contact member 48 will slide off the energized conducting strip 52 and the coil means 36 will be deenergized releasing the rotational retarding force on the armature means 38.
  • contact between the pinion 24 and ring gear 32 provides the drag or loading required to complete the engagement. This drag will also advance the armature 38 away from the magnet body 34 so contact and wear therebetween is prevented.
  • the conducting strip 52 which can either be in series or in parallel with the starting motor, will be in the preferred embodiment of my invention, in series with operator controlled starting switch so that when the starting motor is de-energized, the current conducting strip 52 will be concomitantly de-energized. This permits the electromagnetically initiated friction connection of the advance assist means to be terminated and inertia forces generated by the decelerating starter motor and operating on the starter drive will disengage the drive 10 from ring gear 32.
  • the starter drive accomplishes its stated objectives in providing an advance assist for a starter drive which is position sensitive and capable of ignoring false starts.
  • a starter drive for internal combustion engines having a starter drive housing, a motor driven shaft means having a helical screw thread thereon, and a shiftable drive portion, the shiftable drive portion comprising:
  • a screw sleeve means for cooperatively engaging sa d shaft means
  • advance assist means interconnecting the starter drive housing and the shiftable drive portion operative to provide a position sensitive rotational braking force so that rotation of said sleeve means is selectively braked to cause the helical screw thread to advance said pinion means into engagement with the engine whenever the extent of the advance of the shiftable drive portion on the shaft means is less than a pre determined amount.
  • the starter drive as claimed in claim 2 including further:
  • resilient current conducting contact means attached to said electromagnetic brake means and in sliding contact with said conducting means operative to provide a current conducting path from said conducting means to said electromagnetic brake means.
  • an armature means connected to said shiftable drive portion; and the housing includes current conducting means operative to provide said coil means with electrical energy.
  • said advance assist means include a resilient contact member connected to said coil means and in sliding contact with said conducting strip means.
  • the starter drive as claimed in claim 1 including further:
  • electric advance assist means connected to the housing operative to determine the position to which said advance assist means is sensitive.
  • said electric advance assist means comprise conducting means having a predetermined length
  • sliding contact means adapted to contactively engage said conducting means and operative to axially ad- Vance with the shiftable drive portion whereby electrical contact between said conducting means and said sliding contact means is terminated when the shiftable drive portion advances beyond the desired position.
  • a shiftable drive of a starter system for internal combustion engines having a starter drive housing, a motor, a motor driven shaft means having a helical screw thread thereon comprising:
  • a screw shaft sleeve means for cooperatively engaging References Cited the shaft means; a drive pinion means; UNITED STATES PATENTS a one-way clutch means interconnecting said sleeve 1,897,938 2/1933 Kearney 74-7 meansandsaid pinion n w 2,332,986 10/1943 Buxton 74 7 electromechanical means for selectively, slidably and 5 I nonrotatably interconnecting the shiftable drive With MILTON K AUFM AN Primary Examiner the housing, responsive to energization of the motor to provide rotational braking of the shiftable drive 1 portion whenever the motor is energized and the 29O 38 shiftable drive portion is advanced less than a prede- 10 termined amount.

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  • 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)
US813455A 1969-04-04 1969-04-04 Starter drive with positive advance and inertia release Expired - Lifetime US3572133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81345569A 1969-04-04 1969-04-04

Publications (1)

Publication Number Publication Date
US3572133A true US3572133A (en) 1971-03-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US813455A Expired - Lifetime US3572133A (en) 1969-04-04 1969-04-04 Starter drive with positive advance and inertia release

Country Status (4)

Country Link
US (1) US3572133A (de)
DE (1) DE2016105C3 (de)
FR (1) FR2042896A5 (de)
GB (1) GB1249847A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2360762A1 (fr) * 1976-08-04 1978-03-03 Bosch Gmbh Robert Dispositif de demarrage pour moteurs a combustion interne
US4366385A (en) * 1980-10-22 1982-12-28 Facet Enterprises, Inc. Engine starter drive
US4464576A (en) * 1980-10-22 1984-08-07 Facet Enterprises, Inc. Engine starter drive
US4502429A (en) * 1981-10-09 1985-03-05 Hitachi, Ltd. Inertia drive type starter for internal combustion engine
US4661715A (en) * 1985-03-14 1987-04-28 Facet Enterprises, Inc. Electric roller clutch starter drive
US4738148A (en) * 1984-12-12 1988-04-19 Peter Norton Starter drive
US20160131099A1 (en) * 2013-07-19 2016-05-12 Volvo Truck Corporation Starter device for an internal combustion engine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442973A1 (fr) * 1978-11-29 1980-06-27 Ducellier & Cie Perfectionnement aux demarreurs electriques pour moteurs a combustion interne notamment de vehicules automobiles
FR2585773A1 (fr) * 1985-07-30 1987-02-06 Paris & Du Rhone Dispositif d'avance du lanceur d'un demarreur electrique
JPH01167460A (ja) * 1987-12-23 1989-07-03 Mitsubishi Electric Corp 始動電動機

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2360762A1 (fr) * 1976-08-04 1978-03-03 Bosch Gmbh Robert Dispositif de demarrage pour moteurs a combustion interne
US4366385A (en) * 1980-10-22 1982-12-28 Facet Enterprises, Inc. Engine starter drive
US4464576A (en) * 1980-10-22 1984-08-07 Facet Enterprises, Inc. Engine starter drive
US4502429A (en) * 1981-10-09 1985-03-05 Hitachi, Ltd. Inertia drive type starter for internal combustion engine
US4738148A (en) * 1984-12-12 1988-04-19 Peter Norton Starter drive
US4661715A (en) * 1985-03-14 1987-04-28 Facet Enterprises, Inc. Electric roller clutch starter drive
US20160131099A1 (en) * 2013-07-19 2016-05-12 Volvo Truck Corporation Starter device for an internal combustion engine
US9719478B2 (en) * 2013-07-19 2017-08-01 Volvo Truck Corporation Starter device for an internal combustion engine

Also Published As

Publication number Publication date
GB1249847A (en) 1971-10-13
DE2016105B2 (de) 1978-04-20
FR2042896A5 (de) 1971-02-12
DE2016105C3 (de) 1979-01-11
DE2016105A1 (de) 1970-10-08

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