US20010020461A1 - Apparatus for adjusting a camshaft - Google Patents

Apparatus for adjusting a camshaft Download PDF

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Publication number
US20010020461A1
US20010020461A1 US09/801,829 US80182901A US2001020461A1 US 20010020461 A1 US20010020461 A1 US 20010020461A1 US 80182901 A US80182901 A US 80182901A US 2001020461 A1 US2001020461 A1 US 2001020461A1
Authority
US
United States
Prior art keywords
camshaft
planet
pinion
ring gear
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.)
Abandoned
Application number
US09/801,829
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English (en)
Inventor
Siegfried Heer
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.)
TCG Unitech AG
Original Assignee
TCG Unitech AG
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 TCG Unitech AG filed Critical TCG Unitech AG
Assigned to TCG UNITECH AKTIENGESELLSCHAFT reassignment TCG UNITECH AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HEER, SIEGFRIED
Publication of US20010020461A1 publication Critical patent/US20010020461A1/en
Abandoned 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 invention relates to an apparatus for adjusting a camshaft of an internal combustion engine with at least one electromotor which causes the adjustment of a camshaft towards a pinion by way of a gear, with the gear comprising a planet cage on which at least one planet wheel is provided which is driven by an electromotor.
  • An apparatus for adjusting a camshaft of an internal combustion engine is known from EP 0 903 471 A. Its object is to provide the apparatus with a smaller and compacter arrangement and to minimize the problem of tooth flank play.
  • U.S. Pat. No. 4,517,934 A discloses a device for adjusting a camshaft, in which an electromotor is arranged on a pinion which is in connected with the camshaft via a gear.
  • the electromotor is supplied with power via slip rings.
  • the electromotor and the gear are arranged on different sides of the camshaft on the pinion.
  • DE 40 40 486 discloses a camshaft adjusting device with a gear which causes the adjustment of the camshaft with respect to the pinion.
  • This gear is adjusted in an embodiment by an axially displaceable rod and in another embodiment by a hydraulic machine which is provided in the pinion.
  • the apparatuses described in said publication are highly complex and very susceptible to malfunction.
  • U.S. Pat. No. 5,156,119 A shows an apparatus for changing the valve control times, in which friction wheels are arranged in a pinion which are in connection with a gear arrangement which causes an adjusting movement. By pressing a pair of friction disks against the friction wheels, a change of the valve control times can be achieved.
  • the apparatus can be provided with an exceptionally compact design.
  • a particularly large ratio of transmission with a minimal tooth flank play can be obtained when the planet wheels are arranged as worm wheels and when the ring gear is provided with a helical gearing.
  • every worm wheel is driven by two electromotors which are disposed mutually oppositely.
  • a particularly compact arrangement can be achieved in this manner.
  • a particularly simple arrangement in a cost-effective design can be achieved in such a way that the electromotors are supplied with power through slip rings.
  • a particularly advantageous solution in respect to construction is provided in such a way that the pinion is connected directly with the ring gear.
  • the pinion is preferably provided with an integral arrangement with the ring gear.
  • the apparatus can thus be produced with a particularly compact design.
  • camshaft is in connection with the ring gear and that the pinion is in connection with the planet cage.
  • FIG. 1 shows a partial longitudinal sectional view sectional of the apparatus in accordance with the invention
  • FIG. 2 shows a sectional view along II-II in FIG. 1.
  • the camshaft adjusting apparatus in accordance with the invention is generally composed of a pinion 10 which can be arranged as a toothed pulley or chain wheel and which, through a gear 12 , drives a camshaft 11 on which are arranged cams 13 for actuating inlet and outlet valves (not shown) of the internal combustion engine.
  • the pinion 10 is arranged simultaneously as a ring gear 1 which is provided with a helical gearing 5 which is in engagement with three worm wheels 4 .
  • a planet cage 2 is fixedly connected with the camshaft 11 , which cage carries six electromotors 3 which are each arranged in pairs on a common axle 3 a with a worm wheel 4 and which drive the same via drive shafts 6 .
  • the electromotors 3 are supplied with power through schematically shown slip rings 7 in order to cause the adjusting movement.
  • the pinion 10 is held on the camshaft 11 via a bearing 8 and secured by a screw 9 .
  • a further screw 14 secures the fixed seat of the planet cage 2 on camshaft 11 .
  • the particular advantage of the apparatus in accordance with the invention is that by dividing the actuating moment among several electromotors 3 and by the large transmission ratio which can be achieved by using a ring gear 1 with a respectively large diameter, the load on the individual electromotors 3 is very low. In this way it is possible to achieve an adjustment of the camshaft in a simple and cost-effective manner. In addition to a reduction in fuel consumption and a prevention of emissions which is enabled by the optimization of the internal combustion engine per se, a further reduction in fuel consumption is achieved by the low adjusting energy which is enabled by the apparatus in accordance with the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gear Transmission (AREA)
US09/801,829 2000-03-09 2001-03-09 Apparatus for adjusting a camshaft Abandoned US20010020461A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA390/2000 2000-03-09
AT0039000A AT408897B (de) 2000-03-09 2000-03-09 Vorrichtung zur verstellung einer nockenwelle

Publications (1)

Publication Number Publication Date
US20010020461A1 true US20010020461A1 (en) 2001-09-13

Family

ID=3673317

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/801,829 Abandoned US20010020461A1 (en) 2000-03-09 2001-03-09 Apparatus for adjusting a camshaft

Country Status (4)

Country Link
US (1) US20010020461A1 (ja)
EP (1) EP1136658A3 (ja)
JP (1) JP2001280107A (ja)
AT (1) AT408897B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1338761A1 (en) * 2002-02-22 2003-08-27 BorgWarner Inc. Worm gear driven variable cam phaser
EP1715142A1 (de) * 2005-04-23 2006-10-25 Schaeffler KG Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine
CN112833173A (zh) * 2021-03-04 2021-05-25 常州新联铸业有限公司 基于风力发电机用的行星架及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7562645B2 (en) 2007-07-30 2009-07-21 Delphi Technologies, Inc. Electromechanical camshaft phaser having a worm gear drive with a hypoid gear actuator
JP6676397B2 (ja) * 2016-02-08 2020-04-08 株式会社ミクニ 位相変更ユニット及びバルブタイミング変更装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930266A1 (de) * 1979-07-26 1981-02-12 Volkswagenwerk Ag Nockenwellenanordnung, insbesondere fuer eine brennkraftmaschine
DE3830382C1 (ja) * 1988-09-07 1990-01-18 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4040486A1 (de) * 1990-06-22 1992-01-02 Schrick Gmbh Dr Vorrichtung bei verbrennungsmotoren zur drehung der nockenwelle relativ zum nockenwellenantriebsrad
JPH0486310A (ja) * 1990-07-31 1992-03-18 Atsugi Unisia Corp 内燃機関のバルブタイミング制御装置
JP3837725B2 (ja) * 1997-03-31 2006-10-25 マツダ株式会社 回転位相制御装置
ES2167864T3 (es) * 1997-09-19 2002-05-16 Tcg Unitech Ag Dispositivo para la regulacion del arbol de levas de un motor de combustion interna.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1338761A1 (en) * 2002-02-22 2003-08-27 BorgWarner Inc. Worm gear driven variable cam phaser
US6622677B2 (en) 2002-02-22 2003-09-23 Borgwarner Inc. Worm gear driven variable cam phaser
EP1715142A1 (de) * 2005-04-23 2006-10-25 Schaeffler KG Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine
CN112833173A (zh) * 2021-03-04 2021-05-25 常州新联铸业有限公司 基于风力发电机用的行星架及其使用方法

Also Published As

Publication number Publication date
EP1136658A3 (de) 2001-12-19
EP1136658A2 (de) 2001-09-26
ATA3902000A (de) 2001-08-15
AT408897B (de) 2002-03-25
JP2001280107A (ja) 2001-10-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TCG UNITECH AKTIENGESELLSCHAFT, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HEER, SIEGFRIED;REEL/FRAME:011726/0084

Effective date: 20010307

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE