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WO2003052241A1 - Dispositif de distribution a programme variable de type a engrenage planetaire - Google Patents

Dispositif de distribution a programme variable de type a engrenage planetaire Download PDF

Info

Publication number
WO2003052241A1
WO2003052241A1 PCT/JP2001/011140 JP0111140W WO03052241A1 WO 2003052241 A1 WO2003052241 A1 WO 2003052241A1 JP 0111140 W JP0111140 W JP 0111140W WO 03052241 A1 WO03052241 A1 WO 03052241A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
variable valve
valve timing
camshaft
planetary 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.)
Ceased
Application number
PCT/JP2001/011140
Other languages
English (en)
Japanese (ja)
Inventor
Masato Himura
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.)
Nittan Corp
Original Assignee
Nittan Valve Co Ltd
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 Nittan Valve Co Ltd filed Critical Nittan Valve Co Ltd
Priority to PCT/JP2001/011140 priority Critical patent/WO2003052241A1/fr
Publication of WO2003052241A1 publication Critical patent/WO2003052241A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H35/008—Gearings or mechanisms with other special functional features for variation of rotational phase relationship, e.g. angular relationship between input and output shaft
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the present invention relates to a planetary gear type variable valve timing device that adjusts the phase of a supply / exhaust cam used in an internal combustion engine to vary the opening / closing timing of a supply / exhaust valve.
  • a device for controlling the rotation phase of an output member with respect to an input member has been used, for example, for valve timing control of an internal combustion engine.
  • the rotation of the crankshaft is transmitted to the camshaft via transmission means such as a sprocket (pulley) and a chain (belt), and the rotation of the camshaft causes the intake and exhaust valves to open and close.
  • a rotational phase control that controls the rotational phase of a cam (camshaft) is provided between an input member such as a power input gear on the cam that is linked to the crankshaft and a force shaft that is an output member. Control device is incorporated.
  • variable valve timing devices of this type are known.
  • a planetary gear transmission B consisting of a planetary gear 5 supported on the inner sun gear 3 and a carrier 4 and an outer input internal gear 6 is provided, and the power input gear 2 is integrated with the input internal gear 6 and the carrier 4 is A is known that has a structure in which a stepping motor is installed on the internal combustion engine body, and a worm wheel 7a provided on the sun gear 3 and a worm 7b driven by the stepping motor are connected.
  • a stepping motor is installed on the internal combustion engine body, and a worm wheel 7a provided on the sun gear 3 and a worm 7b driven by the stepping motor are connected.
  • Reference numeral 4a denotes a cylindrical camshaft mounting portion of the carrier 4, which is fixed to an end of the camshaft 1 by a fastening portion bolt 4b.
  • Reference numeral 2b denotes a bearing that supports the power input gear 2
  • reference numeral 3b denotes a bearing that supports the sun gear 3
  • reference numeral 4c denotes a bearing that supports the planetary gear 5.
  • the camshaft 1 rotates with respect to the power input gear 2 at a reduction ratio according to the design of the planetary gear transmission mechanism B, and the reduction ratio of the planetary gear transmission mechanism B, the crankshaft-side gear, and the cam-side power input.
  • the camshaft 1 rotates synchronously with the crankshaft at a rotation speed of 12 with the gear ratio between the gear 2 (the gear to which the power of the crankshaft is input), and the worm 7 b and the worm wheel 7 a
  • the phase of the camshaft 1 is configured to change when the sun gear 3 is rotated by the steering motor via the motor.
  • the gear ratio of the crankshaft side gear and the cam side power input gear and the reduction ratio of the planetary gear transmission mechanism B must be combined.
  • / 2 must be set. That is, the setting of the reduction ratio 1/2 is determined by the configuration of the number of teeth of each gear, but the difficulty of setting the number of teeth of each gear has made the design of the gear very difficult.
  • the reduction ratio (input: output) of the planetary gear transmission mechanism B in which the number of teeth of the sun gear 3 is Za and the number of teeth of the input internal gear 6 is Zc is 1: (ZaZZc ⁇ + l). While being shown, on the relationship between the input internal gear 6 and the sun gear 3 with each other viewed ⁇ through the planetary gear 5, the number of teeth Z c always greater than the number of teeth Z a, where c speed reduction ratio is not a simple value Therefore, this reduction ratio, which is not a simple value, is adjusted by the gear ratio between the crankshaft-side gear and the cam-side power input gear, and the number of rotations of the camshaft 1 becomes 1 Z2 of the number of rotations of the crankshaft. In other words, setting the reduction ratio to 1 Z 2 was very troublesome.
  • the present invention has been made in view of the above-mentioned problems, and not only can the reduction ratio of the camshaft to the crankshaft be 1 Z2, but also a planetary gear type variable valve that can be easily set to a desired reduction ratio. It is intended to provide a timing device. Disclosure of the invention
  • a planetary gear type variable valve timing device of the present invention is provided on a camshaft that is connected to a power input from a crankshaft in an internal combustion engine and that rotates at a reduced speed via a planetary gear transmission mechanism.
  • An input gear connected to the power input unit and a variable valve timing internal gear connected to the variable valve timing unit are rotatably supported by the cam shaft, and a carrier that rotatably supports a planetary gear is connected to the cam shaft.
  • the input internal gear and the variable valve timing internal gear are arranged in the axial direction such that the respective internal teeth of the input internal gear and the variable valve timing internal gear engage with the planetary gear with the same number of teeth, and the planetary gear rolls while revolving.
  • the camshaft is configured to rotate at a reduced speed.
  • the reduction ratio (input: output) of the planetary gear transmission mechanism in which the number of teeth of the sun gear is Z a and the number of teeth of the input internal gear is Z c is 1: (Z aZ Z c ) + 1, but since the number of teeth Za of the sun gear and the number of teeth Zc of the input internal gear are the same, the reduction ratio of the planetary gear transmission mechanism is 1/2.
  • the ratio of the number of teeth between the crankshaft-side gear and the cam-side power input gear (the power input portion to which the rotation of the crankshaft is transmitted) is set to 1: 1, the camshaft can be decelerated relative to the crankshaft.
  • the reduction ratio of the camshaft to the crankshaft depends on the ratio of the number of teeth of the power input gear on the power side to the gear on the crankshaft side (Ze / Zd) and the planetary gear transmission mechanism. It is the product of the reduction ratio (1/2). That is, in order to obtain a desired reduction ratio (N eZN d) of the cam shaft to the crank shaft, the gear ratio is set so that the gear ratio of the crank shaft side gear and the cam side power input gear becomes N d: 2 Ne. Should be designed.
  • FIG. 1 is a schematic sectional view showing one embodiment of a planetary gear type variable valve timing device according to the present invention.
  • FIG. 2 is a view taken in the direction of arrows in FIG. 1 c .
  • FIG. 3 is a sectional view showing an example of a conventional planetary gear type variable valve timing device.
  • FIG. 4 is a view taken along line MM of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 and 2 show an embodiment of a planetary gear type variable valve timing device according to the present invention.
  • a variable valve timing device A ′ is provided between a power input gear 2 to which rotation of a crankshaft (not shown) is transmitted and a camshaft 1, an outer input internal gear 6, an input internal gear A planetary gear transmission mechanism B 'composed of an outer variable valve timing internal gear 3 ′ provided coaxially with 6 and a planetary gear 5 ′ supported by the carrier 4 and engaged with the two gears 6, 3 ′ is provided.
  • the power input gear 2 was integrated with the input internal gear 6, and the carrier 4 was connected to the cam shaft 1.
  • a stepping motor was installed on the internal combustion engine body and provided on the variable valve timing internal gear 3 '.
  • the worm wheel 7a has a structure in which a worm 7b driven by the above-described steering motor is connected.
  • the camshaft 1 is mounted on a cylinder head (not shown) together with a plurality of air supply valves and a plurality of exhaust valves.
  • the cylindrical camshaft mounting portion 4a is integrally connected to the camshaft 1 by fastening bolts 4b.
  • Gear 5 ' is rotatably supported.
  • the planetary gear 5 ′ is a spur gear, as shown in FIG. Are formed longer in the axial direction, and in the axial direction of the planetary gear 5 ′, an input internal gear 6 and a variable valve timing internal gear 3, which replaces the conventional sun gear, have respective internal teeth 6 a, 3a are arranged in parallel with the same number of teeth.
  • the planetary gear 5 ′ is located between the input internal gear 6 and the variable valve timing internal gear 3 ′ arranged coaxially, and rotates by the engagement with the input internal gear 6, and the variable valve timing internal gear In the case of 3 ′, it is configured to roll while rotating, rotate the carrier 4, and rotate the cam shaft 1 at a reduced speed.
  • the power input gear 2 is rotatably supported on the camshaft 1 via a bearing 2b, and the ring-shaped input internal gear 6 is integrally fixed to the power input gear 2 by bolts 2a.
  • the power transmitted to the power input gear 2 is transmitted to the planetary gears 5 via the input internal gear 6.
  • variable valve timing internal gear 3 which replaces the conventional sun gear, is supported by a cam shaft 1 (a cam shaft mounting portion 4a of a carrier) via a bearing 10.
  • a worm wheel 7a is provided on the outer periphery of the variable valve timing internal gear 3, and the worm wheel 7a is driven by a stepping motor (not shown) provided in the internal combustion engine body. Complies with 7b.
  • the stepping motor is driven to rotate the variable valve timing internal gear 3 ′ by a required angle.
  • the input internal gear 6 and the variable valve timing internal gear 3 ′ connected to the planetary gear 5 ′ have the same number of teeth, are arranged in parallel in the axial direction, and are respectively connected to the planetary gear 5.
  • the input internal gear 6 integrated with the power input gear 2 rotates around the shaft 1 and the planetary gear 5 ′ that joins the input internal gear 6.
  • the planetary gear 5 ′ rotates in synchronism with the variable valve timing internal gear 3 ′ (internal teeth 3 a) provided in the axial direction with respect to the input internal shaft 6, and inputs the variable valve timing internal gear 3 ′.
  • the carrier 4 rotates with the revolution of the planetary gear 5, and the camshaft 1 rotates at a reduced speed.
  • the input internal gear 6 and the variable valve timing internal gear 3 ′ in the variable valve timing device A ′ have the same number of teeth, and are combined with the planetary gear 5. Since the carrier 4 rotates, the cam shaft 1 rotates at a reduced speed of 1 to 2 of the number of rotations of the input internal gear 6.
  • the variable valve timing internal gear 3 ′ instead of the sun gear is connected to the camshaft 1 via the worm wheel 7 a which is rotated by the worm 7 b driven by a stepping motor.
  • the phase of the camshaft 1 is changed by rotating around and rotating the mating planetary gear 5 ′ by a required predetermined angle.
  • variable valve timing internal gear 3 ′ is designed such that its internal teeth 3 a are outside the planetary gear 5 ′ and are connected to the planetary gear 5 ′ in parallel with the input internal gear 6.
  • the outer diameter of the power input gear 2 integrally fixed to the input internal gear 6 can also be reduced in the radial direction, and the entire variable valve timing device A can be reduced in the radial direction. Can be downsized.
  • the reduction ratio of the planetary gear transmission mechanism is 12
  • the reduction of the planetary gear mechanism which is not a simple value as in the conventional device
  • the variable valve in the planetary gear transmission mechanism, the timing internal gear, and the input internal gear It is possible to obtain a camshaft reduction ratio of 1/2 by a free design without being restricted by the number of teeth of the planet gears, the strength and size of the teeth, as well as the teeth of the crankshaft side gear and the power input gear. An arbitrary reduction ratio corresponding to a number ratio can be obtained.
  • variable valve timing gear is used instead of the conventional sun gear, and the gear teeth are arranged outside the planetary gears instead of inside the planetary gears.
  • the outer diameter of the variable valve timing internal gear and the input internal gear can be reduced, and the entire variable valve timing device can be radially reduced in diameter to reduce the size of the cylinder head.

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

Abstract

Dispositif de distribution à programme variable de type à engrenage planétaire qui comporte un mécanisme sous forme d'engrenage planétaire possédant une roue interne d'entrée rotative sur un arbre à cames, une roue solaire rotative sur l'arbre à cames et placée à l'intérieur de la roue interne d'entrée, et des roues planétaires rotatives sur un support fixé sur l'arbre à cames et engrenées avec ces deux roues, ainsi qu'un mécanisme de commande de phase de rotation destiné à faire tourner la roue solaire pour modifier la phase de l'arbre à cames. Les roues planétaires comportent en outre des première et seconde roues planétaires disposées parallèlement entre elles dans le sens axial, entraînées en rotation et maintenues par un élément ressort dans des sens opposés. La partie dentelée de la roue interne d'entrée (roue solaire) est maintenue par les parties dentelées des première et seconde roues planétaires, afin de ne pouvoir tourner vers l'avant ou vers l'arrière, au niveau d'engrènement desdites roues planétaires avec la roue interne d'entrée (roue solaire). Même si une variation de couple se produit dans l'arbre à cames lorsque les soupapes sont ouvertes et fermées, les parties dentelées ne produisent aucun bruit de cognement entre elles.
PCT/JP2001/011140 2001-12-19 2001-12-19 Dispositif de distribution a programme variable de type a engrenage planetaire Ceased WO2003052241A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/011140 WO2003052241A1 (fr) 2001-12-19 2001-12-19 Dispositif de distribution a programme variable de type a engrenage planetaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/011140 WO2003052241A1 (fr) 2001-12-19 2001-12-19 Dispositif de distribution a programme variable de type a engrenage planetaire

Publications (1)

Publication Number Publication Date
WO2003052241A1 true WO2003052241A1 (fr) 2003-06-26

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PCT/JP2001/011140 Ceased WO2003052241A1 (fr) 2001-12-19 2001-12-19 Dispositif de distribution a programme variable de type a engrenage planetaire

Country Status (1)

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WO (1) WO2003052241A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005034340A1 (de) * 2005-07-22 2007-02-01 PS Automation GmbH Gesellschaft für Antriebstechnik Planetengetriebe und Stellantrieb für Armaturen mit einem Planetengetriebe
US20150033906A1 (en) * 2013-08-01 2015-02-05 Delphi Technologies, Inc. Axially compact electrically driven camshaft phaser
CN108223033A (zh) * 2016-12-14 2018-06-29 通用汽车环球科技运作有限责任公司 用于内燃机的凸轮轴停用系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147142A (ja) * 1983-02-14 1984-08-23 Hitachi Ltd バツクラツシユ調整機能を有する遊星歯車機構を用いた変速機
JPH11107718A (ja) * 1997-10-07 1999-04-20 Mazda Motor Corp 回転位相制御装置
US20010020460A1 (en) * 2000-03-09 2001-09-13 Siegfried Heer Apparatus for adjusting a camshaft

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147142A (ja) * 1983-02-14 1984-08-23 Hitachi Ltd バツクラツシユ調整機能を有する遊星歯車機構を用いた変速機
JPH11107718A (ja) * 1997-10-07 1999-04-20 Mazda Motor Corp 回転位相制御装置
US20010020460A1 (en) * 2000-03-09 2001-09-13 Siegfried Heer Apparatus for adjusting a camshaft

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MUNEHARU MOROZUMI, 27 April 1989, THE NIKKON KOGYO SHINBUN LTD., article "Yusei haguruma to sado haguruma no riron to sekkei keisanho", XP002909488 *
TAKASHI NAKADA ET AL.: "Haguruma Dendo", vol. 3, 25 August 1966, SEIBUNDO SHINKOSHA PUBLISHING CO., LTD., article "Machine elements kikai sekkei", pages: 116 - 118, XP002909489 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005034340A1 (de) * 2005-07-22 2007-02-01 PS Automation GmbH Gesellschaft für Antriebstechnik Planetengetriebe und Stellantrieb für Armaturen mit einem Planetengetriebe
US8267828B2 (en) 2005-07-22 2012-09-18 Ps Automation Gmbh Actuator for units comprising a planetary gear
DE102005034340B4 (de) * 2005-07-22 2013-05-16 PS Automation GmbH Gesellschaft für Antriebstechnik Planetengetriebe und Stellantrieb für Armaturen mit einem Planetengetriebe
US20150033906A1 (en) * 2013-08-01 2015-02-05 Delphi Technologies, Inc. Axially compact electrically driven camshaft phaser
CN108223033A (zh) * 2016-12-14 2018-06-29 通用汽车环球科技运作有限责任公司 用于内燃机的凸轮轴停用系统
CN108223033B (zh) * 2016-12-14 2020-08-25 通用汽车环球科技运作有限责任公司 用于内燃机的凸轮轴停用系统

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