WO2017030815A1 - Démarreur à embrayage de séparation - Google Patents

Démarreur à embrayage de séparation Download PDF

Info

Publication number
WO2017030815A1
WO2017030815A1 PCT/US2016/045952 US2016045952W WO2017030815A1 WO 2017030815 A1 WO2017030815 A1 WO 2017030815A1 US 2016045952 W US2016045952 W US 2016045952W WO 2017030815 A1 WO2017030815 A1 WO 2017030815A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
shaft
clutch portion
starter motor
actuator
Prior art date
Application number
PCT/US2016/045952
Other languages
English (en)
Inventor
Michael W. CAMPBELL
Original Assignee
Borgwarner Inc.
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 Borgwarner Inc. filed Critical Borgwarner Inc.
Publication of WO2017030815A1 publication Critical patent/WO2017030815A1/fr

Links

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
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/028—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the jaw 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
    • 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 electrically powered started motor is connected to a pinion gear that slides axially to engage with and disengage from a flywheel of the internal combustion engine.
  • an actuator moves the pinion gear into engagement with the flywheel and the electric motor rotates the pinion gear.
  • the electric motor then cranks the engine by rotating the flywheel until the engine is operating under its own power.
  • the electrically powered starter motor is energized and the actuator moves the pinion gear out of engagement with the flywheel.
  • a vehicle shutoff system is intended to reduce fuel consumption by stopping the internal combustion engine while the vehicle is stopped, such as when the vehicle is stopped at a traffic signal or is stopped in traffic.
  • vehicle shutoff systems are typically automatic, and can be controlled by a computing device, which is commonly referred to as a controller.
  • One aspect of the disclosed embodiments is an apparatus for starting an internal combustion engine having a flywheel.
  • the apparatus includes a flywheel, a starter motor having an output shaft that rotates when the starter motor is energized; an actuator having a moving part that moves from a first position to a second position when the actuator is energized; a clutch having a first clutch portion and a second clutch portion, wherein the first clutch portion rotates in unison with the output shaft of the starter motor and the moving part of the actuator is engaged with the first clutch portion to engage and disengage the clutch; and a pinion gear that is connected to the second clutch portion and is engaged with the flywheel for transferring rotation to the flywheel.
  • the apparatus includes a starter motor having an output shaft that rotates when the starter motor is energized; an actuator having a solenoid that is operable to move a fork from a first position to a second position when the actuator is energized; a shaft assembly that is connected to the output shaft of the starter motor; a jaw clutch that is arranged on the shaft assembly, the jaw clutch having a first clutch portion and a second clutch portion, wherein the first clutch portion rotates in unison with the output shaft of the starter motor, the fork of the actuator is engaged with the first clutch portion to engage and disengage the jaw clutch, the first clutch portion is operable to transfer rotation to the second clutch portion when the clutch is engaged, and the first clutch portion is not operable to transfer rotation to the second clutch portion when the clutch is disengaged; and a pinion gear that is connected to the second clutch portion and is engaged with the flywheel for transferring rotation to the flywheel.
  • FIG. 1 is a side view showing a starter and a flywheel of an internal combustion engine in which a starter disconnect clutch is in a disengaged position;
  • FIG. 2 is a side view showing the starter and the flywheel of the internal combustion engine in which the starter disconnect clutch is in the engaged position;
  • FIG. 3 is a cross-section view showing the starter disconnecting clutch
  • FIG. 4 is a cross-section view showing an alternative embodiment of the starter disconnecting clutch.
  • the disclosure herein is directed to a starter for an internal combustion engine in which a pinion gear of the starter is constantly engaged with the flywheel.
  • the starter includes a disconnecting clutch that reduces vibrations that would otherwise be caused by a constantly engaged pinion gear, such as vibrations from torque reversals that can occur when the internal combustion engine stops.
  • FIG. 1 shows a starter assembly 100 for an internal combustion engine (not shown) including a starter 1 10 that is operably engaged with a flywheel 102 of the internal combustion engine.
  • the starter 1 10 includes a starter motor 1 12 that has an output shaft 1 14.
  • the starter motor 1 12 is an electrical motor, as is well-known in the art.
  • the output shaft 1 14 can be directly coupled to the starter motor 1 12, as shown in the illustrated example, or can be indirectly connected to the starter motor 1 12, such as by a gear train.
  • the starter motor 1 12 has an energized state and a de-energized state. In the energized state of the starter motor, electrical power is supplied to the starter motor
  • the starter 1 10 also includes an actuator 120.
  • the actuator 120 is operable to connect and disconnect a torque transfer path between the starter motor 1 12 and the flywheel 102.
  • the actuator 120 includes a solenoid 122 having a plunger 124.
  • the solenoid 122 can be conventional and causes movement of the plunger 124 in response to energization and de-energization of a coil (not shown) of the solenoid 122.
  • the solenoid 122 can cause retraction of the plunger 124 in response to supply of electrical power to the coil of the solenoid 122 and can cause extension of the plunger 124 of the solenoid 122 in response to de- energization of the coil of the solenoid 122.
  • the actuator 120 also includes a moving part 126 that is used to connect and disconnect the torque transfer path between the starter motor 1 12 and the flywheel 102.
  • the moving part 126 of the actuator 120 is a pivotal shift fork. It should be understood, however, that other types of structures could be used as the moving part 126 of the actuator 120. As an example, a translating shift fork could be used as the moving part 126 of the actuator 120. In addition, the moving part 126 could be a structure other than a shift fork.
  • the moving part 126 of the actuator 120 is connected to the plunger 124 of the solenoid 122 by a first pivot joint 128.
  • the moving part 126 of the actuator 120 is also connected to a structure that does not move with respect to the starter motor 1 12 by a second pivot joint 130.
  • a backing plate 132 can be connected to the starter motor 1 12, and the moving part 126 can be connected to the backing plate 132 by the second pivot joint 130.
  • the starter assembly 100 includes a clutch 140.
  • the clutch 140 includes a first clutch portion 142 and a second clutch portion 144.
  • the first clutch portion 142 is connected to the output shaft 1 14 of the starter motor 1 12 such that the first clutch portion 142 rotates in unison with the output shaft
  • the second clutch portion 144 is connected to a pinion gear 160.
  • the second clutch portion 144 can be connected to the pinion gear 160 such that it rotates in unison with the pinion gear 160.
  • the pinion gear 160 is engaged with the flywheel 102. Engagement of the pinion gear 160 with the flywheel 102 is through gear teeth that are formed on each of the pinion gear 160 and the flywheel 102.
  • the gear teeth can be, as examples, spur gear teeth or helical gear teeth.
  • the first clutch portion 142 and the second clutch portion 144 are disposed on a shaft assembly 200 that extends along a shaft axis.
  • the shaft axis is the axis around which the pinion gear 160 rotates.
  • the pinion gear 160 has a fixed axial position along the shaft assembly 200.
  • the second clutch portion 144 can also have a fixed axial position along the shaft assembly 200.
  • the first clutch portion 142 can slide axially along the shaft assembly 200 between a first position (FIG.
  • Movement of the clutch 140 between the engaged position and the disengaged position is accomplished by engagement of the moving part 126 of the actuator 120 with the first clutch portion 142.
  • the first clutch portion 142 can include an annular groove 146 that extends around the axis of the shaft assembly 200.
  • An end portion 131 of the moving part 126 is disposed within the annular groove 146 of the first clutch portion 142.
  • movement of the moving part 126 causes axial motion of the first clutch portion 142 along the axis of the shaft assembly 200 between engagement and disengagement of the first clutch portion 142 with the second clutch portion 144.
  • the end portion 131 of the moving part 126 is a fork that extends around the first clutch portion 142 within the annular groove 146 to opposed sides of the first clutch portion 142.
  • the clutch 140 is a jaw clutch. Other types of clutches can be utilized to establish and eliminate the torque transfer path between the starter motor 1 12 and the pinion gear 160.
  • the clutch 140 can have an overrunning configuration.
  • the mating surfaces 148, 150 of the first clutch portion 142 and the second clutch portion 144, respectively are configured to transfer torque in a first direction, but to not transfer torque in a second direction opposite the first direction.
  • the first direction is the direction in which the starter motor 1 12 rotates in order to start the internal combustion engine. After the internal combustion engine starts, the clutch 140 may remain engaged momentarily. When this occurs, the rotational speed of the second clutch portion 144 will exceed the speed at which the first clutch portion 142 is rotated by the starter motor 1 12.
  • the mating surfaces 148, 150 are configured to allow the second clutch portion 144 to slip with respect to the first clutch portion 142.
  • FIG. 3 shows the shaft assembly 200 according to one implementation.
  • the shaft assembly 200 includes a one-piece shaft 210 that is coupled to the output shaft 1 14 of the starter motor 1 12 for rotation in unison with the output shaft 1 14.
  • the first clutch portion 142 is coupled to the shaft 210 such that it rotates in unison with the shaft 210 but is able to slide axially with respect to the shaft 210. In the illustrated example, this connection is made using splines 212.
  • the second clutch portion 144 and the pinion gear 160 are shown as parts of an integral unit but could be formed separately. In the illustrated example, the second clutch portion 144 and the pinion gear 160 are restrained from moving axially with respect to the shaft 210 by retainers
  • the second clutch portion 144 and the pinion gear 160 are mounted to the shaft 210 for rotation relative to the shaft 210 and around the shaft axis, by structures such as bearings 218.
  • FIG. 4 shows a shaft assembly 300 according to an alternative
  • the shaft assembly 300 includes a first shaft portion 310 and a second shaft portion 320.
  • the first shaft portion 310 is fixed to the output shaft 1 14 of the starter motor 1 12 for rotation in unison with the output shaft 1 14.
  • the second shaft portion 320 is rotatable with respect to the first shaft portion 310 through a connection by elements such as bearings 302.
  • the first clutch portion 142 is connected to the first shaft portion 310 for rotation in unison with the first shaft portion 310 and for axial movement with respect to the first shaft portion 310.
  • this connection is made using splines 312, which prevent rotation of the first clutch portion 142 relatively to the first shaft portion 310 while allowing sliding.
  • connection between the first shaft portion 310 and the second shaft portion 320 is made in the area where the first clutch portion 142 engages the second clutch portion 144. Although this connection is shown in the illustrated example by a part of the second shaft portion 320 extending into a cavity in the first shaft portion 310, it should be understood that other configurations could be utilized.
  • the second clutch portion 144 and the pinion gear 160 are shown as being formed integrally with one another but could be formed separately.
  • the second clutch portion 144 and pinion gear 160 are fixed to the second shaft portion 320 for rotation in unison with it and are fixed such that they are not able to slide axially with respect to the second shaft portion 320.
  • the second clutch portion 144 and the pinion gear 160 can be formed separately from the second shaft portion 320 and fixed to it by any suitable method or structure or method.
  • the second clutch portion 144 and the pinion gear 160 could be formed integrally with the second shaft portion 320.
  • the starter assembly 100 can be utilized to start the internal combustion engine by rotating the flywheel 102 of the internal combustion engine.
  • the clutch 140 is disengaged.
  • the first clutch part 142 can be disposed in a first position in which it is axially spaced from and disengaged from the second clutch part 144.
  • the actuator 120 is energized to move the moving part 126.
  • the moving part 126 moves from a first position to a second position while engaging the first clutch portion 142. This causes movement of the first clutch part 142 axially along the shaft assembly 200 to its second position, in which the first clutch part 142 is in contact with the second clutch part 144, which places the clutch 140 in its engaged position.
  • the starter motor 1 12 Upon energization of the starter motor 1 12, the starter motor 1 12 rotates the first clutch part 142, which in turn rotates the second clutch part 144. Rotational force delivered to the pinion gear 160 from the clutch 140, which causes rotation of the flywheel. If the speed of the flywheel surpasses the speed of the output shaft 114 of the starter motor 112 while the clutch 140 remains engaged, the second clutch part 144 is able to slip relative to the first clutch part 142. After the internal combustion engine has started, the actuator 120 and the starter motor 112 are de- energized.

Abstract

Appareil destiné à démarrer un moteur à combustion interne ayant un volant d'inertie (102), comprenant un moteur (112) de démarreur comportant un arbre de sortie (114) qui tourne lorsque le moteur (112) de démarreur est mis sous tension; un actionneur (120) comportant une partie mobile (126) qui se déplace d'une première position à une seconde position lorsque l'actionneur (120) est mis sous tension; un embrayage (140) comportant une première partie d'embrayage (142) et une seconde partie d'embrayage (144), la première partie d'embrayage (142) tournant à l'unisson avec l'arbre de sortie (114) du moteur (112) de démarreur et la partie mobile (126) de l'actionneur (120) vient en prise avec la première partie d'embrayage (142) pour mettre en prise et désolidariser l'embrayage (140); et un engrenage à pignons (160) qui est relié à la seconde partie d'embrayage (144) et entre en prise avec le volant d'inertie (102) pour transférer la rotation au volant d'inertie (102).
PCT/US2016/045952 2015-08-18 2016-08-08 Démarreur à embrayage de séparation WO2017030815A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562206435P 2015-08-18 2015-08-18
US62/206,435 2015-08-18

Publications (1)

Publication Number Publication Date
WO2017030815A1 true WO2017030815A1 (fr) 2017-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/045952 WO2017030815A1 (fr) 2015-08-18 2016-08-08 Démarreur à embrayage de séparation

Country Status (1)

Country Link
WO (1) WO2017030815A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075275A1 (fr) * 2017-12-18 2019-06-21 Renault S.A.S Dispositif de demarrage pour moteur a combustion interne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000009003A (ja) * 1998-06-18 2000-01-11 Sawafuji Electric Co Ltd エンジン始動装置のピニオン固定構造
US20090064806A1 (en) * 2007-09-12 2009-03-12 Denso Corporation Starter with clutch coaxially disposed on output shaft of motor
KR20090063472A (ko) * 2007-12-14 2009-06-18 현대자동차주식회사 차량용 스타터 모터
KR20130017867A (ko) * 2011-08-12 2013-02-20 두산인프라코어 주식회사 차량엔진 스타터 모터의 동력전달기구
EP1769154B1 (fr) * 2004-06-09 2013-08-28 Valeo Equipements Electriques Moteur Demarreur, notamment de vehicule automobile, equipe d"un lanceur a roue libre par friction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000009003A (ja) * 1998-06-18 2000-01-11 Sawafuji Electric Co Ltd エンジン始動装置のピニオン固定構造
EP1769154B1 (fr) * 2004-06-09 2013-08-28 Valeo Equipements Electriques Moteur Demarreur, notamment de vehicule automobile, equipe d"un lanceur a roue libre par friction
US20090064806A1 (en) * 2007-09-12 2009-03-12 Denso Corporation Starter with clutch coaxially disposed on output shaft of motor
KR20090063472A (ko) * 2007-12-14 2009-06-18 현대자동차주식회사 차량용 스타터 모터
KR20130017867A (ko) * 2011-08-12 2013-02-20 두산인프라코어 주식회사 차량엔진 스타터 모터의 동력전달기구

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075275A1 (fr) * 2017-12-18 2019-06-21 Renault S.A.S Dispositif de demarrage pour moteur a combustion interne

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