US20050051121A1 - Variable camshaft timing phaser having a housing and a driving element of two different materials - Google Patents

Variable camshaft timing phaser having a housing and a driving element of two different materials Download PDF

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Publication number
US20050051121A1
US20050051121A1 US10/932,188 US93218804A US2005051121A1 US 20050051121 A1 US20050051121 A1 US 20050051121A1 US 93218804 A US93218804 A US 93218804A US 2005051121 A1 US2005051121 A1 US 2005051121A1
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Prior art keywords
housing
driving element
phaser
rotor
notched groove
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Abandoned
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US10/932,188
Inventor
Franklin Smith
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BorgWarner Inc
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BorgWarner Inc
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Priority to US10/932,188 priority Critical patent/US20050051121A1/en
Assigned to BORGWARNER INC. reassignment BORGWARNER INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SMITH, FRANKLIN R.
Publication of US20050051121A1 publication Critical patent/US20050051121A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials

Definitions

  • the invention pertains to the field of variable camshaft timing systems. More particularly, the invention pertains to variable camshaft timing system in which the housing and the driving element are made of different materials.
  • variable cam timing systems VCT phasers
  • the driving element and the housing are manufactured as one steel metal piece.
  • U.S. Pat. No. 5,722,295 discloses an injection molded crankshaft gear which is made by placing sintered iron insert ring and forming the outside portion and teeth portion of the gear by injection molding a resin and then heat treating the molding so that certain properties are present.
  • U.S. Pat. No. 5,333,668 discloses a process for coating the surface of a ferrous insert with a thin layer of metallic bonding material enabling the coated insert to be united with molten aluminum where the molten aluminum is pouted onto the coated insert.
  • the aluminum or ferrous liner insert is preheated and placed in the engine and molten aluminum is pouted into the mold to surround the outer surface of the liner.
  • JP 11200819 discloses a camshaft of an over head cam (OHC) engine that drives an intake and exhaust valve that is formed of a synthetic resin and is integrally formed by injection molding with a metal sprocket.
  • OOC over head cam
  • JP06225505 discloses aluminum injected into slot holes and ring shapes in the rotor core of an induction motor.
  • JP 2000297614 discloses a gear and a housing that are integrally provided on an intake camshaft, such that the gear and the housing may rotate.
  • a vane rotor housed in a chamber between the gear and the housing is fastened to the end portion of the intake camshaft to rotate integrally therewith.
  • the housing and the rotor are made of aluminum-type metals.
  • a thin metal sheet of steel is interposed between the vane rotor and the housing.
  • a variable cam timing phaser for an internal combustion engine having at least one camshaft comprising a housing, a rotor, and a driving element.
  • the housing is has an outer circumference for accepting drive force, a circular notched groove, and is made of a first material.
  • the notched groove may be axially centered between the leading and trailing edges of the housing or adjacent to either of the leading or trailing edges of the housing.
  • the rotor connects to a camshaft coaxially located within the housing.
  • the driving element is made of a second material and is coaxially located around the outer circumference of the housing.
  • the first material is aluminum or magnesium and the second material is steel.
  • the driving element may be a gear or a sprocket.
  • the driving element may be axially centered on the housing.
  • FIG. 1 shows a schematic of a first embodiment of the present invention.
  • FIG. 2 shows a schematic of a second embodiment of the present invention.
  • FIG. 3 shows a schematic of a third embodiment of the present invention.
  • FIG. 4 shows a schematic of a fourth embodiment of the present invention.
  • FIG. 5 shows a schematic of a cross-section of FIG. 4 .
  • FIG. 6 shows a schematic of a cross-section of FIG. 1 .
  • FIG. 1 shows a variable cam timing phaser in which the housing 104 is made of a first material and contains a circumferential notched groove or inset 114 .
  • the notched groove 114 is axially centered on the outer circumference of the housing 104 between the leading and trailing edges of the housing 104 .
  • the notched groove 114 receives driving element 108 .
  • the driving element 108 is made of a second material.
  • the driving element 108 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • the housing 104 surrounds the rotor 102 , which provides a connection, in this case a mounting flange 110 to a camshaft 120 coaxially located within the housing 104 .
  • the rotor 102 is shown schematically and no details should be implied, including the shape of the spool 112 and the location of the spool.
  • the first material is preferably aluminum, magnesium, another lightweight material, or plastic.
  • the second material is preferably steel.
  • the rotor 102 may also be made of the same first material as the housing 104 .
  • Cover plates 106 are present on either side of the housing 104 .
  • FIG. 6 shows a cross-section of FIG. 1 and the relationship of the housing 104 relative to the rotor 102 to form the chamber 118 for receiving the vane 116 of rotor.
  • FIG. 6 also shows examples of an interlocking feature 122 , 124 .
  • the interlocking feature 122 , 124 may be any radial feature that facilitates radial, axial, and rotational retention.
  • the interlocking feature 122 , 124 may extend from the driving element 108 into the housing 104 as shown by 122 or from the housing 104 to the driving element 108 as shown by 124 .
  • the shape of the interlocking feature 122 , 124 is not limited to those shown in FIG. 6 .
  • the interlocking feature 122 , 124 may be continuously present around the circumference of the housing 104 or may be spaced around the circumference of the housing 104 with one or more interlocking features 122 , 124 present.
  • the interlocking features 122 , 124 shown in FIG. 6 may be present in any of the embodiments of the present invention.
  • FIG. 2 shows a second embodiment in which the housing 204 is made of a first material and contains a circumferential notched groove or inset 214 .
  • the notched groove 214 is adjacent to either the leading end or the trailing edge of the housing 204 .
  • the notched groove 214 receives driving element 208 .
  • the driving element 208 is made of a second material.
  • the driving element 208 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • the housing 204 surrounds the rotor 202 which provides a connection, in this case a mounting flange 210 , to a camshaft 220 coaxially located within the housing 204 .
  • the rotor 202 is shown schematically and no details should be implied, including the shape of the spool 212 and the location of the spool.
  • the first material is preferably aluminum, magnesium, another lightweight material, or plastic.
  • the second material is preferably steel.
  • the rotor 202 may also be made of the same first material as the housing 204 .
  • Cover plates 206 are present on either side of the housing 204 .
  • FIG. 3 shows another embodiment of the present invention in which the driving element 308 is centrally located around the circumference of the housing 304 between the leading and trailing edges of the housing.
  • the housing 304 is made of a first material and the driving element 308 is made of a second material.
  • the driving element 308 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • the housing 304 surrounds the rotor 302 , which provides a connection, in this case a mounting flange 310 , to a camshaft 320 coaxially located within the housing 304 .
  • the rotor 302 is shown schematically and no details should be implied, including the shape of the spool 312 and the location of the spool.
  • the first material is preferably aluminum, magnesium, another lightweight material or plastic.
  • the second material is preferably steel.
  • the rotor 302 may also be made of the same material as the housing 304 .
  • FIG. 4 shows a fourth embodiment in which the housing 404 is made of a first material and contains a circumferential notched groove or inset 414 .
  • the notched groove 414 is along the entire outer circumference width of the housing 404 extending between the leading and the trailing edges of the housing 404 .
  • the notched groove 414 receives the driving element 408 .
  • the driving element 408 is made of a second material.
  • the driving element 408 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • the housing 404 surrounds the rotor 402 , which provides a connection, in this case a mounting flange 410 , to a camshaft 420 coaxially located within the housing 404 .
  • the rotor 402 is shown schematically and no details should be implied, including the shape of the spool 412 and the location of the spool.
  • the first material is preferably aluminum, magnesium, another lightweight material, or plastic.
  • the second material is preferably steel.
  • the rotor 402 may also be made of the same first material as the housing 404 . Cover plates 406 are present on either side of the housing 404 .
  • FIG. 5 shows a cross-section of FIG. 4 and the relationship of the housing 404 relative to the rotor 402 to form the chamber 418 for receiving the vane 416 of the rotor 402 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

A variable cam timing phaser for an internal combustion engine having at least one camshaft comprising a housing, a rotor, and a driving element. The housing is has an outer circumference for accepting drive force, a circular notched groove, and is made of a first material. The notched groove may be axially centered between the leading and trailing edges of the housing or adjacent to either of the leading or trailing edges of the housing. The rotor connects to a camshaft coaxially located within the housing. The driving element is made of a second material and is coaxially located around the outer circumference of the housing. The first material is aluminum or magnesium and the second material is steel. The driving element may be a gear or a sprocket. The driving element may be axially centered on the housing.

Description

    REFERENCE TO RELATED APPLICATIONS
  • This application claims an invention which was disclosed in Provisional Application No. 60/500,839, filed Sep. 5, 2003, entitled “VARIABLE CAMSHAFT TIMING CASTING WITH INSERT HAVING SPROCKET TEETH.” The benefit under 35 USC §119(e) of the U.S. provisional application is hereby claimed, and the aforementioned application is hereby incorporated herein by reference.
    • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The invention pertains to the field of variable camshaft timing systems. More particularly, the invention pertains to variable camshaft timing system in which the housing and the driving element are made of different materials.
  • 2. Description of Related Art
  • Generally in variable cam timing systems (VCT) phasers, the driving element and the housing are manufactured as one steel metal piece.
  • Some alternatives to creating sprockets and other engine parts of more than one piece, though not for VCT phasers is shown in U.S. Pat. No. 6,283,076, which discloses a method of forming a compliant sprocket by forming the metal hub and rim portions and injection molding an elastomeric material, rubber, into the gap between the hub and the rim. Heat is applied, causing the rubber to vulcanize in place resulting in a one-piece compliant sprocket.
  • U.S. Pat. No. 5,722,295 discloses an injection molded crankshaft gear which is made by placing sintered iron insert ring and forming the outside portion and teeth portion of the gear by injection molding a resin and then heat treating the molding so that certain properties are present.
  • U.S. Pat. No. 5,333,668 discloses a process for coating the surface of a ferrous insert with a thin layer of metallic bonding material enabling the coated insert to be united with molten aluminum where the molten aluminum is pouted onto the coated insert. In another embodiment, the aluminum or ferrous liner insert is preheated and placed in the engine and molten aluminum is pouted into the mold to surround the outer surface of the liner.
  • JP 11200819 discloses a camshaft of an over head cam (OHC) engine that drives an intake and exhaust valve that is formed of a synthetic resin and is integrally formed by injection molding with a metal sprocket.
  • Another solution is JP06225505, which discloses aluminum injected into slot holes and ring shapes in the rotor core of an induction motor.
  • JP 2000297614 discloses a gear and a housing that are integrally provided on an intake camshaft, such that the gear and the housing may rotate. A vane rotor housed in a chamber between the gear and the housing is fastened to the end portion of the intake camshaft to rotate integrally therewith. The housing and the rotor are made of aluminum-type metals. A thin metal sheet of steel is interposed between the vane rotor and the housing.
    • SUMMARY OF THE INVENTION
  • A variable cam timing phaser for an internal combustion engine having at least one camshaft comprising a housing, a rotor, and a driving element. The housing is has an outer circumference for accepting drive force, a circular notched groove, and is made of a first material. The notched groove may be axially centered between the leading and trailing edges of the housing or adjacent to either of the leading or trailing edges of the housing. The rotor connects to a camshaft coaxially located within the housing. The driving element is made of a second material and is coaxially located around the outer circumference of the housing. The first material is aluminum or magnesium and the second material is steel. The driving element may be a gear or a sprocket. The driving element may be axially centered on the housing.
    • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 shows a schematic of a first embodiment of the present invention.
  • FIG. 2 shows a schematic of a second embodiment of the present invention.
  • FIG. 3 shows a schematic of a third embodiment of the present invention.
  • FIG. 4 shows a schematic of a fourth embodiment of the present invention.
  • FIG. 5 shows a schematic of a cross-section of FIG. 4.
  • FIG. 6 shows a schematic of a cross-section of FIG. 1.
    • DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 shows a variable cam timing phaser in which the housing 104 is made of a first material and contains a circumferential notched groove or inset 114. The notched groove 114 is axially centered on the outer circumference of the housing 104 between the leading and trailing edges of the housing 104. The notched groove 114 receives driving element 108. The driving element 108 is made of a second material. The driving element 108 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • The housing 104 surrounds the rotor 102, which provides a connection, in this case a mounting flange 110 to a camshaft 120 coaxially located within the housing 104. The rotor 102 is shown schematically and no details should be implied, including the shape of the spool 112 and the location of the spool.
  • The first material is preferably aluminum, magnesium, another lightweight material, or plastic. The second material is preferably steel. The rotor 102 may also be made of the same first material as the housing 104. Cover plates 106 are present on either side of the housing 104.
  • FIG. 6 shows a cross-section of FIG. 1 and the relationship of the housing 104 relative to the rotor 102 to form the chamber 118 for receiving the vane 116 of rotor. FIG. 6 also shows examples of an interlocking feature 122, 124. The interlocking feature 122, 124 may be any radial feature that facilitates radial, axial, and rotational retention. The interlocking feature 122, 124 may extend from the driving element 108 into the housing 104 as shown by 122 or from the housing 104 to the driving element 108 as shown by 124. The shape of the interlocking feature 122, 124 is not limited to those shown in FIG. 6. The interlocking feature 122, 124 may be continuously present around the circumference of the housing 104 or may be spaced around the circumference of the housing 104 with one or more interlocking features 122, 124 present. The interlocking features 122, 124 shown in FIG. 6 may be present in any of the embodiments of the present invention.
  • FIG. 2 shows a second embodiment in which the housing 204 is made of a first material and contains a circumferential notched groove or inset 214. The notched groove 214 is adjacent to either the leading end or the trailing edge of the housing 204. The notched groove 214 receives driving element 208. The driving element 208 is made of a second material. The driving element 208 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • The housing 204 surrounds the rotor 202 which provides a connection, in this case a mounting flange 210, to a camshaft 220 coaxially located within the housing 204. The rotor 202 is shown schematically and no details should be implied, including the shape of the spool 212 and the location of the spool.
  • The first material is preferably aluminum, magnesium, another lightweight material, or plastic. The second material is preferably steel. The rotor 202 may also be made of the same first material as the housing 204. Cover plates 206 are present on either side of the housing 204.
  • FIG. 3 shows another embodiment of the present invention in which the driving element 308 is centrally located around the circumference of the housing 304 between the leading and trailing edges of the housing. The housing 304 is made of a first material and the driving element 308 is made of a second material. The driving element 308 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • The housing 304 surrounds the rotor 302, which provides a connection, in this case a mounting flange 310, to a camshaft 320 coaxially located within the housing 304. The rotor 302 is shown schematically and no details should be implied, including the shape of the spool 312 and the location of the spool.
  • The first material is preferably aluminum, magnesium, another lightweight material or plastic. The second material is preferably steel. The rotor 302 may also be made of the same material as the housing 304.
  • FIG. 4 shows a fourth embodiment in which the housing 404 is made of a first material and contains a circumferential notched groove or inset 414. The notched groove 414 is along the entire outer circumference width of the housing 404 extending between the leading and the trailing edges of the housing 404. The notched groove 414 receives the driving element 408. The driving element 408 is made of a second material. The driving element 408 is used to accept drive and may be a gear if a timing gear is used or a sprocket if a timing chain or timing belt is used.
  • The housing 404 surrounds the rotor 402, which provides a connection, in this case a mounting flange 410, to a camshaft 420 coaxially located within the housing 404. The rotor 402 is shown schematically and no details should be implied, including the shape of the spool 412 and the location of the spool.
  • The first material is preferably aluminum, magnesium, another lightweight material, or plastic. The second material is preferably steel. The rotor 402 may also be made of the same first material as the housing 404. Cover plates 406 are present on either side of the housing 404.
  • FIG. 5 shows a cross-section of FIG. 4 and the relationship of the housing 404 relative to the rotor 402 to form the chamber 418 for receiving the vane 416 of the rotor 402.
  • Accordingly, it is to be understood that the embodiments of the invention herein described are merely illustrative of the application of the principles of the invention. Reference herein to details of the illustrated embodiments is not intended to limit the scope of the claims, which themselves recite those features regarded as essential to the invention.

Claims (12)

1. A variable cam timing phaser for an internal combustion engine having at least one camshaft comprising:
a housing of a first material having an outer circumference for accepting drive force;
a rotor for connection to a camshaft coaxially located within the housing; and
a drive element of a second material coaxially located around the outer circumference of the housing.
2. The phaser of claim 1, wherein the rotor is made of the first material.
3. The phaser of claim 1, wherein the first material is aluminum or magnesium.
4. The phaser of claim 1, wherein the second material is steel.
5. The phaser of claim 1, wherein the driving element is a sprocket.
6. The phaser of claim 1, wherein the driving element is a gear.
7. The phaser of claim 1, further comprising a first cover plate and a second cover plate.
8. The phaser of claim 1, wherein the driving element is axially centered on the housing.
9. The phaser of claim 1, wherein the housing has a circular notched groove.
10. The phaser of claim 9, wherein the driving element is inset in the notched groove.
11. The phaser of claim 9, wherein the notched groove is axially centered between a leading and a trailing edge of the housing.
12. The phaser of claim 9, wherein the notched groove is adjacent to either the leading edge of the housing or the trailing edge of the housing.
US10/932,188 2003-09-05 2004-09-01 Variable camshaft timing phaser having a housing and a driving element of two different materials Abandoned US20050051121A1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009065731A1 (en) 2007-11-23 2009-05-28 Schaeffler Kg Modular construction camshaft adjuster with a chain or belt wheel
DE102007056549A1 (en) 2007-11-23 2009-05-28 Schaeffler Kg Cranked chain or pulley for modular camshaft adjuster
US10954829B2 (en) 2018-12-19 2021-03-23 Borgwarner, Inc. Oldham flexplate for concentric camshafts controlled by variable camshaft timing
US11193399B2 (en) 2018-11-27 2021-12-07 Borgwarner, Inc. Variable camshaft timing assembly
US11280228B2 (en) 2020-07-07 2022-03-22 Borgwarner, Inc. Variable camshaft timing assembly
US11852054B2 (en) 2021-09-17 2023-12-26 Borgwarner Inc. Variable camshaft timing system

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DE102014214119A1 (en) * 2014-07-21 2015-08-20 Schaeffler Technologies AG & Co. KG Phaser
DE102014221192A1 (en) * 2014-10-20 2016-04-21 Schaeffler Technologies AG & Co. KG Phaser

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US3678557A (en) * 1969-04-08 1972-07-25 Ford Motor Co Method for making gear
US5333668A (en) * 1991-12-09 1994-08-02 Reynolds Metals Company Process for creation of metallurgically bonded inserts cast-in-place in a cast aluminum article
US5588404A (en) * 1994-12-12 1996-12-31 General Motors Corporation Variable cam phaser and method of assembly
US5722295A (en) * 1995-09-28 1998-03-03 Fuji Jukogyo Kabushiki Kaisha Injection-molded gear for engine and manufacturing method therefor
US5836278A (en) * 1997-03-04 1998-11-17 Ina Walzlager Schaeffler Ohg Device for varying the valve control timing of an internal combustion engine, especially camshaft setting mechanism according to the vane cell principle
US6283076B1 (en) * 2000-06-09 2001-09-04 Borgwarner Inc. Torsionally compliant sprocket for engine balance shaft drive and method of manufacture

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678557A (en) * 1969-04-08 1972-07-25 Ford Motor Co Method for making gear
US5333668A (en) * 1991-12-09 1994-08-02 Reynolds Metals Company Process for creation of metallurgically bonded inserts cast-in-place in a cast aluminum article
US5588404A (en) * 1994-12-12 1996-12-31 General Motors Corporation Variable cam phaser and method of assembly
US5722295A (en) * 1995-09-28 1998-03-03 Fuji Jukogyo Kabushiki Kaisha Injection-molded gear for engine and manufacturing method therefor
US5836278A (en) * 1997-03-04 1998-11-17 Ina Walzlager Schaeffler Ohg Device for varying the valve control timing of an internal combustion engine, especially camshaft setting mechanism according to the vane cell principle
US6283076B1 (en) * 2000-06-09 2001-09-04 Borgwarner Inc. Torsionally compliant sprocket for engine balance shaft drive and method of manufacture

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009065731A1 (en) 2007-11-23 2009-05-28 Schaeffler Kg Modular construction camshaft adjuster with a chain or belt wheel
DE102007056549A1 (en) 2007-11-23 2009-05-28 Schaeffler Kg Cranked chain or pulley for modular camshaft adjuster
DE102007056550A1 (en) 2007-11-23 2009-05-28 Schaeffler Kg Modular built-up camshaft adjuster with chain or belt pulley
US20100242876A1 (en) * 2007-11-23 2010-09-30 Schaeffler Technologies Gmbh & Co. Kg Modular construction camshaft adjuster with a chain or belt wheel
US11193399B2 (en) 2018-11-27 2021-12-07 Borgwarner, Inc. Variable camshaft timing assembly
US10954829B2 (en) 2018-12-19 2021-03-23 Borgwarner, Inc. Oldham flexplate for concentric camshafts controlled by variable camshaft timing
US11280228B2 (en) 2020-07-07 2022-03-22 Borgwarner, Inc. Variable camshaft timing assembly
US11852054B2 (en) 2021-09-17 2023-12-26 Borgwarner Inc. Variable camshaft timing system

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JP2005083384A (en) 2005-03-31

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