EP2006501A1 - Appareil déphaseur à came variable - Google Patents

Appareil déphaseur à came variable Download PDF

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Publication number
EP2006501A1
EP2006501A1 EP07252533A EP07252533A EP2006501A1 EP 2006501 A1 EP2006501 A1 EP 2006501A1 EP 07252533 A EP07252533 A EP 07252533A EP 07252533 A EP07252533 A EP 07252533A EP 2006501 A1 EP2006501 A1 EP 2006501A1
Authority
EP
European Patent Office
Prior art keywords
gear
ring
planetary
gears
ring gear
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.)
Withdrawn
Application number
EP07252533A
Other languages
German (de)
English (en)
Inventor
Manfred Kolkman
Pierluigi Zingale
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.)
MG Mini Gears SpA
Delphi Technologies Inc
Original Assignee
MG Mini Gears SpA
Delphi Technologies 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 MG Mini Gears SpA, Delphi Technologies Inc filed Critical MG Mini Gears SpA
Priority to EP07252533A priority Critical patent/EP2006501A1/fr
Publication of EP2006501A1 publication Critical patent/EP2006501A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01L1/352—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 bevel or epicyclic gear

Definitions

  • the present invention relates to a cam phaser apparatus, particularly, but not exclusively a variable cam phaser apparatus used in valve trains of automobile engines.
  • cam phase i.e. the angular relationship between the crankshaft and the camshaft
  • Such systems are required to efficiently convert rotational movement from the crankshaft into rotational movement of the camshaft whilst allowing dislocation between these rotational movements in order to allow variation of the cam phase.
  • one shaft is connected to the cam sprocket or pulley to comprise a drive member (typically the ring carrier) and a second shaft is connected to the camshaft (typically the planet carrier) to comprise a driven member, the remaining third shaft (typically the sun gear) being connected to an actuator, in the form of an electric motor, for varying the cam phase (i.e. the angular relationship between the drive and driven members).
  • a drive member typically the ring carrier
  • the camshaft typically the planet carrier
  • driven member typically the remaining third shaft (typically the sun gear) being connected to an actuator, in the form of an electric motor, for varying the cam phase (i.e. the angular relationship between the drive and driven members).
  • the actuator is typically an electric motor that is mechanically linked to the reduction gearset by means of a mechanical coupling.
  • a cam phaser apparatus for transferring a driving torque from a driving member to a driven member and for selectively adjusting the angular relationship between the drive and driven members, said apparatus comprising a first ring gear connectable to said driven member, for example a camshaft , a second ring gear connectable to said driving member, for example a cam sprocket or pulley, said first and second ring gears being coaxially arranged alongside one another, said first ring gear having a different number of teeth than said second ring gear, and at least one planetary gear supported on a planetary gear carrier, said at least one planetary gear engaging both said first and second ring gears to transfer a driving torque therebetween, said planetary gear carrier being connected to an actuator for rotating the planetary gear carrier or applying a braking torque and/or a motoring torque to said gear carrier to rotate said at least one first planetary gear with respect to said first and second ring gears to vary the angular relationship between the first and second ring gears
  • said first and second ring gears have the same gear diameter.
  • first and second rings gears and said at least one first planetary gear have a gear profile adapted to permit said at least one first planetary gear to rotatably mesh with both said first and second ring gears.
  • the first ring gear may have two gear teeth more or less than the second ring gear to give a reduction ratio of 50:1.
  • two of said first planetary gears may be mounted on said carrier at locations spaced 180° from each other.
  • said first ring gear is provided with 102 teeth and said second ring gear is provided with 100 teeth
  • one or more intermediate planetary gears may be mounted on the carrier, said one or more intermediate planetary gears having a first gear segment meshing with said first ring gear and a second gear segment meshing with said second ring gear, said first and second gear segments having gear profiles radially offset from each other.
  • Said one or more intermediate planetary gears may be provided at equi-spaced locations between said first planetary gears, wherein the gear offset between the first and second gear segments of the intermediate planetary gears is equal to 1/2 tooth.
  • said planetary gear carrier and said second ring gear are rotatably supported on said first ring gear to enable the resulting gear assembly to be mounted directly onto a camshaft.
  • the gear assembly is mounted to the camshaft using a single central mounting bolt.
  • cam sprocket or pulley is mounted on or formed integrally with said second ring gear.
  • a cam phaser apparatus comprises coaxial input and output ring gears 2, 4, the input ring gear 2 being drivingly connected to a cam pulley or sprocket 6 and the output ring gear 4 being drivingly connected to a camshaft 8.
  • the output ring gear 4 is rotatably supported by the input ring gear 2.
  • the input ring gear 2 and output ring gear 4 are providing with cooperating end-stops 9,10 to limit the maximum phasing angle between the gears.
  • Each of the input and output ring gears 2,4 have inwardly facing gear teeth provided on the inner periphery thereof, the gear teeth of the input ring gear 2 being arranged on a first contact circle and the gear teeth of the output ring gear 4 being arranged on a second contact circle coaxial with and of equal diameter to said first circle.
  • a planetary carrier 14 is rotatably mounted on the input ring gear 2 by means of a bearing and supports a pair of equally spaced planetary gears 16,18 each planetary gear meshing with the gear teeth of both the input and output ring gears 2,4 to enable torque to be transferred between the input and output ring gears 2,4 via the gear teeth.
  • the planetary carrier 14 is drivingly engaged by the control shaft 20 of a rotary actuator 22 (e.g. an electric motor) to provide a motoring or braking torque to the planetary carrier 14 to adjust the cam phase, as will be described below.
  • a rotary actuator 22 e.g. an electric motor
  • the body of the actuator 22 is mounted upon the cylinder head of the engine (not shown).
  • the input ring gear 2 is provided with a different number of teeth than the output ring gear 4 such that rotation of the planetary carrier 14 with respect to the input ring gear 2, and thus rotation of the planetary gears 16,18, varies the angular relationship between the input and output ring gears 2,4.
  • the input ring gear 2 is provided with 102 teeth while the output ring gear 4 is provided with 100 teeth to give a reduction ration of 50:1.
  • a high reduction ratio is required to match the torque capability of the electrical actuator with the torque loading of the camshaft.
  • the gear teeth profiles of the planetary gears 16,18 and the ring gears 2,4 are corrected to compensate for the slightly different pitch diameter of the gear teeth of the input ring gear 2 compared to those of the output ring gear 4 due to the unequal number of gear teeth therebetween.
  • intermediate planetary gears 30,32 may be provided at intermediate locations between the main planetary gears 16,18.
  • the intermediate planetary gears 30,32 are provided with a first gear segment 34 adapted to mesh with the teeth 10 of the input ring gear 2 and a second gear segment 36 adapted to mesh with the teeth 12 of the second ring gear 4, the teeth of the first gear segment 34 being radially offset with respect to the teeth of the second gear segment 36, as illustrated in Fig. 5 .
  • Such intermediate planetary gears 30,32 are located equidistant between said main planetary gears 16,18, such gear offset will be equal to half a gear tooth.
  • the cam phaser according to the present invention can be mounted directly on the end of the camshaft 8 without requiring additional support structures and thus provides a more compact arrangement than prior art devices.
  • the absence of a sun gear enables access to the end of the camshaft 8 to enable the cam phaser to be bolted directly to the end of the camshaft by a single centre bolt 40, greatly facilitating assembly.
  • the inner periphery of the planetary carrier 14 can be provided with a simply keyway arrangement 15 to enable the output shaft 20 of the actuator to be easily drivingly engaged with the planetary carrier 14.
  • the actuator 22 In operation, at a constant cam phase, the actuator 22 will be operated at the same speed as the speed of the input ring gear 2. As such, the angular orientation between the input ring gear 2 and the output ring gear 4 is locked and maintained via the planetary gears 16,18.
  • a respective motoring or braking torque is applied to the planetary carrier 14 to rotate the planetary carrier 14 with respect to the input ring gear 2, thus rotating the planetary gears 16,18 (and 30,32 in the case of the second embodiment) to adjust the relative angular orientation of the output ring gear 4 with respect to the input ring gear 2 and thus the relative angular orientation between the cam sprocket 6 and the camshaft 8.
  • Position sensors may be provided to detect the relative positions of the input and output ring gears 2,4 to provide a feedback control for the cam phaser.
  • any acceleration of the actuator 22 in clockwise direction when looking towards the camshaft will cause the output ring gear 4 will accelerate with respect to the input ring gear 2 and hence induce a cam phase towards retard position.
  • the input ring gear 2 can have with fewer instead of more teeth that the output ring gear 4. This will invert the cam phase change direction of the camshaft for the same actuator operation.
EP07252533A 2007-06-22 2007-06-22 Appareil déphaseur à came variable Withdrawn EP2006501A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07252533A EP2006501A1 (fr) 2007-06-22 2007-06-22 Appareil déphaseur à came variable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07252533A EP2006501A1 (fr) 2007-06-22 2007-06-22 Appareil déphaseur à came variable

Publications (1)

Publication Number Publication Date
EP2006501A1 true EP2006501A1 (fr) 2008-12-24

Family

ID=38688489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07252533A Withdrawn EP2006501A1 (fr) 2007-06-22 2007-06-22 Appareil déphaseur à came variable

Country Status (1)

Country Link
EP (1) EP2006501A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012110149A1 (fr) * 2011-02-14 2012-08-23 Schaeffler Technologies AG & Co. KG Mécanisme de réglage à trois arbres présentant un organe d'accouplement élastique
WO2012110128A3 (fr) * 2011-02-14 2012-10-11 Schaeffler Technologies AG & Co. KG Mécanisme de réglage à trois arbres comprenant deux butées mécaniques
CN104233592A (zh) * 2014-10-13 2014-12-24 湖州现代纺织机械有限公司 一种凸轮调节机构
WO2015187469A1 (fr) * 2014-06-05 2015-12-10 Borgwarner Inc. Dispositif de mise en phase de cames électrique avec planétaire fixe
WO2016036528A1 (fr) * 2014-09-04 2016-03-10 Borgwarner Inc. Phaseur de temporisation d'arbre à cames variable de moteur avec un ensemble d'engrenages planétaires
WO2016044044A1 (fr) * 2014-09-17 2016-03-24 Borgwarner Inc. Déphaseur d'arbre à cames variable de moteur à train planétaire
EP3059401A1 (fr) * 2015-02-04 2016-08-24 Delphi Technologies, Inc. Déphaseur d'arbre à cames et actionneur pour celui-ci
CN106505319A (zh) * 2016-11-24 2017-03-15 广东博纬通信科技有限公司 一种模块化传动装置及多频天线
US9771839B2 (en) 2014-06-25 2017-09-26 Borgwarner Inc. Camshaft phaser systems and locking phasers for the same
DE102017008953A1 (de) 2017-09-25 2019-03-28 Daimler Ag Kupplungsvorrichtung zum Koppeln eines Nockenwellenverstellers, mit einem Aktuator
US10352419B2 (en) 2016-06-30 2019-07-16 Borgwarner Inc. Carrier stop for split ring planetary drive
US10408096B2 (en) 2017-03-16 2019-09-10 Borgwarner Inc. Engine variable camshaft timing phaser with planetary gear set
US10514068B2 (en) 2017-07-31 2019-12-24 Borgwarner, Inc. EPhaser cushion stop

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1039101A2 (fr) * 1999-03-23 2000-09-27 TCG UNITECH Aktiengesellschaft Déphaseur d'arbre à cames pour moteur à combustion interne
WO2003056141A1 (fr) * 2001-12-26 2003-07-10 Nittan Valve Co., Ltd. Dispositif de reglage de distribution variable de type engrenage planetaire
DE10315151A1 (de) * 2003-04-03 2004-10-14 Daimlerchrysler Ag Vorrichtung zur relativen Winkelverstellung einer Nockenwelle gegenüber dem antreibenden Antriebsrad
DE10323705A1 (de) * 2003-05-22 2004-12-09 Daimlerchrysler Ag Vorrichtung zum geregelten Verstellen der relativen Drehlage zwischen einer Kurbelwelle und einer Nockenwelle
DE102004009128A1 (de) * 2004-02-25 2005-09-15 Ina-Schaeffler Kg Elektrischer Nockenwellenversteller
DE102004046363A1 (de) * 2004-09-24 2006-04-06 Daimlerchrysler Ag Nockenwellenverstelleinrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1039101A2 (fr) * 1999-03-23 2000-09-27 TCG UNITECH Aktiengesellschaft Déphaseur d'arbre à cames pour moteur à combustion interne
WO2003056141A1 (fr) * 2001-12-26 2003-07-10 Nittan Valve Co., Ltd. Dispositif de reglage de distribution variable de type engrenage planetaire
DE10315151A1 (de) * 2003-04-03 2004-10-14 Daimlerchrysler Ag Vorrichtung zur relativen Winkelverstellung einer Nockenwelle gegenüber dem antreibenden Antriebsrad
DE10323705A1 (de) * 2003-05-22 2004-12-09 Daimlerchrysler Ag Vorrichtung zum geregelten Verstellen der relativen Drehlage zwischen einer Kurbelwelle und einer Nockenwelle
DE102004009128A1 (de) * 2004-02-25 2005-09-15 Ina-Schaeffler Kg Elektrischer Nockenwellenversteller
DE102004046363A1 (de) * 2004-09-24 2006-04-06 Daimlerchrysler Ag Nockenwellenverstelleinrichtung

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012110128A3 (fr) * 2011-02-14 2012-10-11 Schaeffler Technologies AG & Co. KG Mécanisme de réglage à trois arbres comprenant deux butées mécaniques
US8950371B2 (en) 2011-02-14 2015-02-10 Schaeffler Technologies Gmbh & Co. Kg Three-shaft transmission having an elastic coupling element
WO2012110149A1 (fr) * 2011-02-14 2012-08-23 Schaeffler Technologies AG & Co. KG Mécanisme de réglage à trois arbres présentant un organe d'accouplement élastique
CN106460586A (zh) * 2014-06-05 2017-02-22 博格华纳公司 具有固定太阳行星齿轮系的电动凸轮相位器
US10107154B2 (en) 2014-06-05 2018-10-23 Borgwarner, Inc. Electric cam phaser with fixed sun planetary
WO2015187469A1 (fr) * 2014-06-05 2015-12-10 Borgwarner Inc. Dispositif de mise en phase de cames électrique avec planétaire fixe
US9771839B2 (en) 2014-06-25 2017-09-26 Borgwarner Inc. Camshaft phaser systems and locking phasers for the same
US10006321B2 (en) 2014-09-04 2018-06-26 Borgwarner, Inc. Engine variable camshaft timing phaser with planetary gear set
CN106605044A (zh) * 2014-09-04 2017-04-26 博格华纳公司 具有行星齿轮组的发动机可变凸轮轴正时相位器
WO2016036528A1 (fr) * 2014-09-04 2016-03-10 Borgwarner Inc. Phaseur de temporisation d'arbre à cames variable de moteur avec un ensemble d'engrenages planétaires
CN106605044B (zh) * 2014-09-04 2018-02-23 博格华纳公司 具有行星齿轮组的发动机可变凸轮轴正时相位器
US20170248047A1 (en) * 2014-09-04 2017-08-31 Borgwarner Inc. Engine variable camshaft timing phaser with planetary gear set
US9810109B2 (en) 2014-09-17 2017-11-07 Borgwarner Inc. Engine variable camshaft timing phaser with planetary gear set
CN107075983B (zh) * 2014-09-17 2018-12-04 博格华纳公司 具有行星齿轮组的发动机可变凸轮轴正时相位器
WO2016044044A1 (fr) * 2014-09-17 2016-03-24 Borgwarner Inc. Déphaseur d'arbre à cames variable de moteur à train planétaire
CN107075983A (zh) * 2014-09-17 2017-08-18 博格华纳公司 具有行星齿轮组的发动机可变凸轮轴正时相位器
CN104233592B (zh) * 2014-10-13 2016-05-11 湖州现代纺织机械有限公司 一种凸轮调节机构
CN104233592A (zh) * 2014-10-13 2014-12-24 湖州现代纺织机械有限公司 一种凸轮调节机构
EP3059401A1 (fr) * 2015-02-04 2016-08-24 Delphi Technologies, Inc. Déphaseur d'arbre à cames et actionneur pour celui-ci
US9617878B2 (en) 2015-02-04 2017-04-11 Delphi Technologies, Inc. Camshaft phaser and actuator for the same
US10352419B2 (en) 2016-06-30 2019-07-16 Borgwarner Inc. Carrier stop for split ring planetary drive
CN106505319A (zh) * 2016-11-24 2017-03-15 广东博纬通信科技有限公司 一种模块化传动装置及多频天线
CN106505319B (zh) * 2016-11-24 2023-06-20 广东博纬通信科技有限公司 一种模块化传动装置及多频天线
US10408096B2 (en) 2017-03-16 2019-09-10 Borgwarner Inc. Engine variable camshaft timing phaser with planetary gear set
US10514068B2 (en) 2017-07-31 2019-12-24 Borgwarner, Inc. EPhaser cushion stop
DE102017008953A1 (de) 2017-09-25 2019-03-28 Daimler Ag Kupplungsvorrichtung zum Koppeln eines Nockenwellenverstellers, mit einem Aktuator

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