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WO2012079794A1 - Système de réglage pour soupapes d'échange de gaz de moteurs à combustion interne à piston alternatif - Google Patents

Système de réglage pour soupapes d'échange de gaz de moteurs à combustion interne à piston alternatif Download PDF

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Publication number
WO2012079794A1
WO2012079794A1 PCT/EP2011/066860 EP2011066860W WO2012079794A1 WO 2012079794 A1 WO2012079794 A1 WO 2012079794A1 EP 2011066860 W EP2011066860 W EP 2011066860W WO 2012079794 A1 WO2012079794 A1 WO 2012079794A1
Authority
WO
WIPO (PCT)
Prior art keywords
camshaft
cam
adjustment system
internal combustion
cams
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/EP2011/066860
Other languages
German (de)
English (en)
Inventor
Claudia Zielinski
Michael Bogner
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2012079794A1 publication Critical patent/WO2012079794A1/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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve

Definitions

  • Field of the Invention Displacement system of reciprocating internal combustion engine gas exchange valves with a camshaft driven by a crankshaft of the internal combustion engine, with adjusting cams fixedly mounted on the camshaft and operatively connected to actuators, which control the gas exchange valves, and with a device for axial displacement of the camshaft ,
  • the object of the invention is therefore to improve an adjustment system of the type described and to simplify and to solve the problems mentioned.
  • the object of the invention is achieved in that the adjusting cams are designed as step cams with cams arranged next to one another and that the camshaft of the internal combustion engine having intake and / or exhaust cams is equipped with a step cam.
  • the camshaft is axially loaded on the one hand by a spring and on the other hand it is driven axially by preferably a hydraulically or electrically actuated actuator.
  • the system is designed so that the preferred axial position is predetermined by the spring.
  • the actuator can then be depressurized or de-energized.
  • the step cam has in its peripheral region at least one displacement groove which can be contacted with at least one pin of a preferably electromagnetically actuated, stationary adjustment device, wherein the profile of the displacement groove or displacement grooves is selected such that the intervention of the or the pins causes axial displacement of the step cam and the camshaft.
  • the displacement grooves can be arranged on the step cam, preferably on the base circle, or on the camshaft, outside the step cam, or on a control disk which is connected to the camshaft.
  • the locking cam or the camshaft has a locking device in communication with it, the step cam and the camshaft the position of the cams to the actuator locked axially fitting.
  • This can be done by a spring-loaded locking body, which is stationary with locking grooves on the camshaft or the step cam in operative connection.
  • the locking device can also be arranged in an advantageous manner between the camshaft and a drive wheel which will be described below.
  • the drive wheel of the camshaft is arranged axially displaceable on the camshaft and axially fixed to the housing or a component of the housing of the internal combustion engine. Therefore, the drive wheel without further measures part of a chain or belt drive between the crankshaft and the camshaft or be.
  • the transmission profile between the camshaft and the drive wheel can be aligned axially parallel to the camshaft, in which case only a displacement, but not a rotation of the camshaft relative to the drive wheel takes place.
  • a desired rotation and thus also a phase change of the camshaft are given when the transmission profile between the camshaft and the drive wheel has a torsion curve. Then the camshaft is additionally rotated when displaced in the drive wheel.
  • the transmission profile can be designed as a linear bearing, in particular rolling element linear bearings.
  • FIG. 1 shows a side view of a camshaft with stepped cam and partial section through a drive wheel
  • Figure 2 a similar side view as Figure 1 with modified axial displacement.
  • FIGS. 1 and 2 designates a camshaft on which a step cam 2 is arranged in a rotationally and axially fixed manner.
  • the step cam 2 has arranged side by side cams 3 and 3a, which have different cam elevations at an unchanged base circle.
  • the camshaft 1 is guided in bearings 4 shown only sketched and there also axially slidably arranged.
  • a drive wheel 5 is provided, which is arranged axially displaceably on the camshaft 1.
  • the transmission profile between the camshaft 1 and the drive wheel 5 is formed twisted, while the transmission profile is performed in Figure 2 axially parallel to the camshaft 1.
  • the drive wheel 5 is, not shown, axially guided in a housing, in particular the cylinder head of a reciprocating piston engine and possibly stored separately from the camshaft 1, so that an axial displacement of the camshaft 1 is not transmitted to the drive wheel 5.

Landscapes

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

Abstract

L'invention concerne un système de réglage pour soupapes d'échange de gaz de moteurs à combustion interne à piston alternatif, ledit système comportant un arbre à cames (1) entraîné par un vilebrequin du moteur à combustion interne, des cames de réglage disposées fixement sur l'arbre à cames (1) et coopérant avec des éléments d'actionnement, ces derniers commandant les soupapes d'échange de gaz, et un dispositif permettant un déplacement axial de l'arbre à cames (1). Les cames de réglage sont réalisées sous la forme de cames à gradins (2) comportant des disques à cames (3) placés les uns à côté des autres et l'arbre à cames (1) du moteur à combustion interne présentant les cames d'admission et/ou d'échappement est équipé d'une came à gradins (2).
PCT/EP2011/066860 2010-12-17 2011-09-28 Système de réglage pour soupapes d'échange de gaz de moteurs à combustion interne à piston alternatif Ceased WO2012079794A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010063389 DE102010063389A1 (de) 2010-12-17 2010-12-17 Verstellsystem für Gaswechselventile von Hubkolbenbrennkraftmaschinen
DE102010063389.5 2010-12-17

Publications (1)

Publication Number Publication Date
WO2012079794A1 true WO2012079794A1 (fr) 2012-06-21

Family

ID=44741309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/066860 Ceased WO2012079794A1 (fr) 2010-12-17 2011-09-28 Système de réglage pour soupapes d'échange de gaz de moteurs à combustion interne à piston alternatif

Country Status (2)

Country Link
DE (1) DE102010063389A1 (fr)
WO (1) WO2012079794A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017121420A1 (fr) * 2016-01-15 2017-07-20 Schaeffler Technologies AG & Co. KG Mécanisme de distribution variable
WO2019037945A1 (fr) * 2017-08-24 2019-02-28 Bayerische Motoren Werke Aktiengesellschaft Mécanisme de distribution pour moteur à combustion interne

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1291528A (en) * 1969-07-30 1972-10-04 Nissan Motor Valve timing system in an automotive internal combustion engine
DE2300827A1 (de) * 1973-01-09 1974-07-11 Keller Edmund Ventilbetaetigungssystem einer hubkolbenbrennkraftmaschine
US4399784A (en) * 1981-02-10 1983-08-23 Foley James E Internal combustion engine
US5129407A (en) * 1991-06-10 1992-07-14 J. D. Phillips Corporation Variable camshaft
EP0579592A1 (fr) * 1992-07-13 1994-01-19 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Moteur à combustion interne à arbre à came à dispositif de positionnement axial variable
WO1995020720A1 (fr) 1994-01-31 1995-08-03 Charles Mendler Systeme de soupapes reglables destine a un moteur a combustion interne a multi-soupapes
GB2341659A (en) * 1998-10-30 2000-03-22 Christopher Paulet Mel Walters Axially and rotationally adjustable camshaft arrangement.
DE102007010150A1 (de) * 2007-03-02 2008-09-04 Audi Ag Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit Nockenträgerarretierung von außen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1291528A (en) * 1969-07-30 1972-10-04 Nissan Motor Valve timing system in an automotive internal combustion engine
DE2300827A1 (de) * 1973-01-09 1974-07-11 Keller Edmund Ventilbetaetigungssystem einer hubkolbenbrennkraftmaschine
US4399784A (en) * 1981-02-10 1983-08-23 Foley James E Internal combustion engine
US5129407A (en) * 1991-06-10 1992-07-14 J. D. Phillips Corporation Variable camshaft
EP0579592A1 (fr) * 1992-07-13 1994-01-19 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Moteur à combustion interne à arbre à came à dispositif de positionnement axial variable
WO1995020720A1 (fr) 1994-01-31 1995-08-03 Charles Mendler Systeme de soupapes reglables destine a un moteur a combustion interne a multi-soupapes
GB2341659A (en) * 1998-10-30 2000-03-22 Christopher Paulet Mel Walters Axially and rotationally adjustable camshaft arrangement.
DE102007010150A1 (de) * 2007-03-02 2008-09-04 Audi Ag Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit Nockenträgerarretierung von außen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017121420A1 (fr) * 2016-01-15 2017-07-20 Schaeffler Technologies AG & Co. KG Mécanisme de distribution variable
WO2019037945A1 (fr) * 2017-08-24 2019-02-28 Bayerische Motoren Werke Aktiengesellschaft Mécanisme de distribution pour moteur à combustion interne
US11002162B2 (en) 2017-08-24 2021-05-11 Bayerische Motoren Werke Aktiengesellschaft Valve drive for an internal combustion engine

Also Published As

Publication number Publication date
DE102010063389A1 (de) 2012-06-21

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