EP3721062A1 - Dispositif d'entraînement pour le réglage d'un arbre de commande d'une commande de soupape entièrement variable d'un moteur à combustion interne - Google Patents

Dispositif d'entraînement pour le réglage d'un arbre de commande d'une commande de soupape entièrement variable d'un moteur à combustion interne

Info

Publication number
EP3721062A1
EP3721062A1 EP18811782.4A EP18811782A EP3721062A1 EP 3721062 A1 EP3721062 A1 EP 3721062A1 EP 18811782 A EP18811782 A EP 18811782A EP 3721062 A1 EP3721062 A1 EP 3721062A1
Authority
EP
European Patent Office
Prior art keywords
control shaft
variable valve
internal combustion
combustion engine
adjusting
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Withdrawn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
EP18811782.4A
Other languages
German (de)
English (en)
Inventor
Michael Breuer
Stefan Moormann
Christoph Sadowski
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3721062A1 publication Critical patent/EP3721062A1/fr
Withdrawn legal-status Critical Current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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • 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
    • 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
    • F01L2001/3521—Harmonic drive of flexspline type
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0073—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "Delphi" type
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/103—Electric motors
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators

Definitions

  • the present invention relates to a drive device for adjusting a control shaft of a fully variable valve train of an internal combustion engine having an electric motor with a drive shaft and coupled to the electric motor gear, wherein an output member of the transmission is coupled to a control shaft of a fully variable valve train.
  • Mechanically controllable, fully variable valve trains are known in various designs from the prior art and serve the reduction of fuel consumption and the reduction of emissions.
  • a control shaft is used to change the valve stroke. By changing the valve lift as a function of the load of the internal combustion engine, an increase in efficiency is achieved.
  • a fully variable valve train with input and output valves which can be actuated by a facial expressions.
  • the facial expressions include a control shaft with cams, which act on the valve train, so that by rotation of the control shaft, the stroke of the valves can be adjusted both in the lifting height and in its phase.
  • the rotation of the control shaft via an electronic actuator which is arranged radially to the control shaft and consists of a worm gear, wherein the worm is arranged on the output shaft of the electric motor and acts on a gear which is fixed on the control shaft.
  • a disadvantage is the space requirement of the radially mounted actuator including the transmission, since the space is limited radially to the control shaft by other components of the internal combustion engine.
  • the invention is therefore based on the object to develop a drive for the control shaft, which reduces the indicated disadvantage of the required space requirement in the radial direction to the control shaft and thus saves the limited space in the control shaft in the radial direction
  • the drive shaft of the electric motor and the control shaft is aligned coaxially with each other, so that additional radial space is saved and storage is facilitated.
  • the waves are arranged in alignment with each other.
  • an eccentric gear is used as the transmission, since these eccentric gear have a compact design and a high reduction ratio. Furthermore, these transmissions have a long service life and a small installation space and high reduction ratios can be realized in a few gear stages.
  • the drive shaft of the electric motor is arranged in the axial extension of the control shaft, so that no offset between The drive shaft and the control shaft is created so that space is saved and a direct force transmission exists.
  • the ring gear of the transmission is fixed on one end of the control shaft and serves as a driven member.
  • the eccentric is fixed to the drive shaft of the electric motor or the eccentric is formed integrally with the drive shaft, whereby components are saved, so that the drive is less expensive.
  • the drive shaft of the electric motor is mounted in the control shaft.
  • transverse forces are absorbed by the bearings of the control shaft, so that it is possible to dispense with additional bearing points for mounting the drive shaft, whereby the actuator has a shorter axial length.
  • the planet gears are mounted on the eccentric, since thus transverse and bending forces are reduced and a longer life is achieved.
  • Preferred is the use of an electronically commutated internal rotor motor, which has a low power consumption with low wear.
  • FIG. 1 shows a sectional view of a drive device according to the invention for rotating a control shaft.
  • the drive device has an electric motor 10, which is arranged in a motor housing 12 and is designed as an electronically commutated internal rotor motor.
  • the electric motor consists of a stator 14 with windings 16, which are energized to generate a rotational movement of a rotor 18 of the electric motor 10.
  • the rotor is mounted on a drive shaft 20 whose end protrudes from the motor housing 12 through an opening 15 in the motor housing 12 into a space 13 which is closed by a valve cover 24 of an internal combustion engine and in which a control shaft 22 of a variable valve train is arranged. In a recess at the end of the control shaft 22 protrudes the end of the drive shaft 20 and is supported there by means of a needle bearing.
  • an eccentric 27 is fixed or integrally formed with the drive shaft 20.
  • the eccentric 27 carries a needle bearing 28, via which a first planetary gear 32 and a second planetary gear 30 are mounted, which are arranged rotationally fixed to each other.
  • the second planetary gear 30 has, in the radially inner region, an annular extension 34 extending axially into an inner opening of the first planetary gear 32, on which the first one Planet wheel 32 is pressed or otherwise secured.
  • the first planet gear 32 meshes with a first ring gear 36 which is fixed to an inner wall of the valve cover 24.
  • the second planetary gear 30 is coupled to a driven member 38 which is configured as a second ring gear fixedly disposed within an axially extending annular projection of the control shaft 22 extending from a plate-shaped member fixedly disposed on the end of the control shaft 22 is or is integrally formed with this.
  • a driven member 38 which is configured as a second ring gear fixedly disposed within an axially extending annular projection of the control shaft 22 extending from a plate-shaped member fixedly disposed on the end of the control shaft 22 is or is integrally formed with this.
  • an electronically commutated internal rotor motor can be used, which is arranged parallel to the transmission, whereby no installation space is necessary radially to the valve train and the actuator is arranged completely in the axial direction of extent.
  • an at least two-stage planetary gear can be used, wherein a first sun gear is fixed to the drive shaft or made in one piece with this. By a rotationally fixed coupling of the first planetary gear with the second planetary gear, a rotation of the drive shaft is transmitted to the rotatably mounted in the control shaft second ring gear.

Landscapes

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

Abstract

L'invention concerne des dispositifs d'entraînement pour le réglage d'un arbre de commande (22) d'une commande de soupapes entièrement variable d'un moteur à combustion interne comportant un moteur électrique (10) ayant un arbre d'entraînement (20) et une transmission (26) couplée au moteur électrique (10), un élément de sortie (38) de la transmission (26) étant couplé à un arbre de commande (22) d'une commande de soupape entièrement variable. Conformément à l'invention, pour qu'un tel entraînement soit disposé de manière axiale par rapport à l'arbre de commande (22) de telle sorte qu'aucun espace de montage ne soit nécessaire de manière radiale par rapport à la commande de soupape, les axes de rotation de la transmission (26) sont disposés parallèlement à l'arbre de commande (22) et à l'arbre d'entraînement (20) du moteur électrique (10).
EP18811782.4A 2017-12-06 2018-11-28 Dispositif d'entraînement pour le réglage d'un arbre de commande d'une commande de soupape entièrement variable d'un moteur à combustion interne Withdrawn EP3721062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017129025.7A DE102017129025A1 (de) 2017-12-06 2017-12-06 Antriebsvorrichtung zur Verstellung einer Steuerwelle eines vollvariablen Ventiltriebs einer Verbrennungskraftmaschine
PCT/EP2018/082846 WO2019110388A1 (fr) 2017-12-06 2018-11-28 Dispositif d'entraînement pour le réglage d'un arbre de commande d'une commande de soupape entièrement variable d'un moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP3721062A1 true EP3721062A1 (fr) 2020-10-14

Family

ID=64564864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18811782.4A Withdrawn EP3721062A1 (fr) 2017-12-06 2018-11-28 Dispositif d'entraînement pour le réglage d'un arbre de commande d'une commande de soupape entièrement variable d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP3721062A1 (fr)
DE (1) DE102017129025A1 (fr)
WO (1) WO2019110388A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10120449A1 (de) * 2001-04-26 2002-10-31 Ina Schaeffler Kg Elektromotorisch verdrehbare Welle
DE10211998A1 (de) * 2002-03-18 2003-10-02 Ina Schaeffler Kg Vorrichtung zum Steuern der Zylinderladung eines fremdgezündeten Verbrennungsmotors
DE102004003327A1 (de) * 2004-01-22 2005-09-29 Entec Consulting Gmbh Vorrichtung zur variablen Ventilhubverstellung von Gaswechselventilen einer Verbrennungskraftmaschine
JP4896817B2 (ja) * 2006-07-25 2012-03-14 本田技研工業株式会社 内燃機関の可変動弁装置
JP4952653B2 (ja) * 2007-06-04 2012-06-13 株式会社デンソー バルブタイミング調整装置
US20100059005A1 (en) * 2008-09-08 2010-03-11 Stone Albert C Method and apparatus for adjusting variable valve lift
DE102010033089A1 (de) * 2010-08-02 2012-02-02 Schaeffler Technologies Gmbh & Co. Kg Ventiltriebssystem
PL231252B1 (pl) * 2014-06-27 2019-02-28 Bydon Slawomir Przekładnia zębata mimośrodowa
DE102015118884A1 (de) 2015-11-04 2017-05-04 Pierburg Gmbh Mechanisch steuerbarer Ventiltrieb
DE102016205805A1 (de) * 2016-04-07 2017-10-12 Bayerische Motoren Werke Aktiengesellschaft Ventiltrieb sowie Motorbaugruppe

Also Published As

Publication number Publication date
WO2019110388A1 (fr) 2019-06-13
DE102017129025A1 (de) 2019-06-06

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