EP2118454B1 - dispositif de commande de soupape pour moteur à combustion interne à piston - Google Patents

dispositif de commande de soupape pour moteur à combustion interne à piston Download PDF

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Publication number
EP2118454B1
EP2118454B1 EP08716853A EP08716853A EP2118454B1 EP 2118454 B1 EP2118454 B1 EP 2118454B1 EP 08716853 A EP08716853 A EP 08716853A EP 08716853 A EP08716853 A EP 08716853A EP 2118454 B1 EP2118454 B1 EP 2118454B1
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EP
European Patent Office
Prior art keywords
valves
engine
valve
camshaft
primary
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.)
Active
Application number
EP08716853A
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German (de)
English (en)
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EP2118454A1 (fr
Inventor
Hugh Blaxill
Falk Schneider
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.)
Mahle International GmbH
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Mahle International GmbH
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Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2118454A1 publication Critical patent/EP2118454A1/fr
Application granted granted Critical
Publication of EP2118454B1 publication Critical patent/EP2118454B1/fr
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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
    • F01L1/34413—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 composite camshafts, e.g. with cams being able to move relative to the camshaft
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake

Definitions

  • the invention relates to a valve train of a reciprocating internal combustion engine according to the preamble of patent claim 1 and deals with the problem of improving the working and / or braking operation of the internal combustion engine by special structural designs of the valve train and the possible valve control thereby possible.
  • the invention is based on the general idea, in the case of an engine cylinder with at least two functionally identical valves operating as inlet or exhaust valves, that the functionally identical valves act at least temporarily asynchronously on the respective associated valves during a four-stroke cycle.
  • a camshaft with within this camshaft against each other rotatable, ie phase-adjustable cam.
  • a primary and a secondary cam may be provided.
  • the camshaft used is one which consists of two concentric mutually rotatable, mutually rotatable shafts, for example, the primary cam can be firmly connected to the outer shaft and the secondary cam can be firmly connected to the inner shaft during a bearing on the outer shaft.
  • the secondary cam can be rotated relative to the primary cam.
  • Such camshafts are known as so-called adjustable camshafts known from the prior art, and from JP-A-60 147 512 known, so that their structure and function here no further explanation is necessary.
  • Fig. 1 shown schematically including valve train four-valve engine cylinder act on two intake valves 1 and two exhaust valves 2 each have a camshaft as an adjusting element, namely a first camshaft 3 on the intake valves 1 and a second camshaft 4 on the exhaust valves 2.
  • the intake and exhaust valves. 1 2 which are respectively provided in pairs, respectively comprise primary and secondary valves, namely in the intake valves 1 a primary inlet valve 1p and a secondary inlet valve 1s on the one hand and on the other hand in the outlet valves 2 a primary outlet valve 2p and a secondary outlet valve 2s.
  • Both camshafts 3, 4 each have two mutually rotatable, that is phasenver ause cam, namely a primary cam 5 and a secondary cam 6.
  • Both camshafts 3, 4 consist of two mutually rotatable, concentric nested shafts, namely an inner shaft 7 and a tubular Outer shaft 8.
  • the primary cam 5 are each firmly connected to the outer shaft and the secondary cam 6 fixed to the inner shaft 7.
  • the fixedly connected to the inner shaft 7 secondary cam 6 are rotatable on the outer shaft 8 mounted and each rotatably connected by a pin 9 with the inner shaft 7.
  • the camshafts 3, 4 can be driven for example via the respective outer shaft 8.
  • the secondary cam 6 can be phase-shifted with respect to the primary cam 5 rotating at the input speed of the respective camshaft.
  • the invention resides in an engine cylinder with a valve device including a valvetrain Fig. 1 in that at least two functionally identical valves, that is, the intake or exhaust valves 1; 2 each by a phase adjustment between the primary and secondary cam 5, 6 of the functionally identical valves 1; 2 actuating camshafts 3 or 4 can be actuated asynchronously against each other. It may be sufficient, only one type of functionally identical valves 1, 2, that is, either only the intake valves 1 or only the exhaust valves 2 each against each other to operate asynchronously. In addition, of course, a combination is possible, wherein for a realization of the invention in each case functionally identical valves 1; 2 asynchronously be present against each other and must be operated in certain engine operating conditions actually asynchronous.
  • crankshaft rotation angle " ⁇ " for a full power stroke over 360 ° are plotted on the abscissa, while on the ordinate in each case the stroke "h" of the valves 1, 2 is indicated.
  • the engine operation control diagram in the figure part a shows that the maximum achievable strokes "h" of the two exhaust valves 2p, 2s are different. Thereafter, the secondary valve 2s has a significantly lower maximum lift than the primary exhaust valve 2p. The secondary outlet valve works for this 2s during the "ejection" cycle almost during the entire cycle time with maximum opening stroke.
  • the secondary exhaust valve 2s is driven asynchronously with respect to the primary exhaust valve 2p in such a manner that the secondary exhaust valve is already opened almost during the entire "work" cycle (A).
  • the direction of the corresponding phase shift in the braking operation relative to the engine operation is indicated in the figure part b with an arrow P1.
  • valves 1, 2 The opening and closing times of the valves 1, 2 are indicated by indicating the associated crankshaft angle " ⁇ " in the control diagrams.
  • the control diagrams relate in the figure part a to a high-speed engine operation and in the figure part b to a Motor operation according to the invention with low speed. Due to the phase shift in the direction of the arrow P2 of the secondary inlet valve 1s shown in the figure part 2, an improved charge movement is achieved in the "intake" cycle (C) by the late opening of the secondary valve 2s, whereby a better combustion in this operating state can be achieved.
  • the structure and designations of the control diagrams in the Fig. 3 correspond in meaning to those in Fig. 2 ,
  • the control diagrams relate in the figure part a engine part load operation at high speed and in the figure part b a full engine load operation.
  • the control diagrams relate in the part of the part a engine part load operation and in the figure part b a full engine operation according to the invention.
  • the difference between the two control diagrams is that the exhaust valves 1, 2 are operated out of phase with each other.
  • the secondary exhaust valve 2s is opened prematurely with respect to the primary exhaust valve 2p.
  • the direction of the relevant phase shift between the two exhaust valves is indicated by an arrow P4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Gear-Shifting Mechanisms (AREA)

Claims (3)

  1. Train de soupapes d'un moteur à piston alternatif, dans lequel chaque cylindre de moteur est coordonné à au moins trois soupapes (1, 2) actionnées par des cames (5, 6) d'un arbre à cames (3, 4) et respectivement deux soupapes (1, 2) exercent la même fonction qu'une soupape d'admission primaire et une soupape d'échappement secondaire (1p, 1s ; 2p, 2s), et dans lequel les cames (3, 4) de l'arbre à cames coordonné aux soupapes de fonction similaire peuvent être réglées en phase,
    caractérisé en ce que
    chaque cylindre de moteur est coordonné à au moins deux soupapes d'échappement (2), et en ce que un régime de freinage du moteur peut être réalisé par une position modifiable par un régime de moteur contraire à la normale des cames (5, 6) actionnant ces soupapes d'échappement (2).
  2. Train de soupapes selon la revendication 1,
    caractérisé en ce que
    parmi les soupapes d'échappement (2) chaque cylindre de moteur est coordonné à au moins une des cames (5, 6), qui ouvre au minimum cette soupape d'échappement (2s) par rapport à une autre soupape d'échappement (2p) du cylindre de moteur respectif.
  3. Train de soupapes selon la revendication 2,
    caractérisé en ce que
    la soupape d'échappement (2s) s'ouvrant au minimum est ouverte par sa came (5, 6) réglée en phase pendant le régime de freinage du moteur approximativement lors du cycle de travail total du cylindre de moteur respectif.
EP08716853A 2007-02-16 2008-02-14 dispositif de commande de soupape pour moteur à combustion interne à piston Active EP2118454B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007007758A DE102007007758A1 (de) 2007-02-16 2007-02-16 Ventiltrieb eines Hubkolben-Verbrennungsmotors
PCT/EP2008/051805 WO2008098991A1 (fr) 2007-02-16 2008-02-14 Dispositif de soupape d'un moteur à combustion interne à piston élévateur

Publications (2)

Publication Number Publication Date
EP2118454A1 EP2118454A1 (fr) 2009-11-18
EP2118454B1 true EP2118454B1 (fr) 2010-04-28

Family

ID=39433926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08716853A Active EP2118454B1 (fr) 2007-02-16 2008-02-14 dispositif de commande de soupape pour moteur à combustion interne à piston

Country Status (6)

Country Link
US (1) US9080472B2 (fr)
EP (1) EP2118454B1 (fr)
JP (1) JP5398548B2 (fr)
AT (1) ATE466171T1 (fr)
DE (2) DE102007007758A1 (fr)
WO (1) WO2008098991A1 (fr)

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CN103180556B (zh) * 2011-04-15 2015-06-10 丰田自动车株式会社 发动机的控制装置
DE102012220543A1 (de) 2012-11-12 2014-05-15 Schaeffler Technologies Gmbh & Co. Kg Nockenwellenverstelleinrichtung
EP2915964A1 (fr) 2014-03-03 2015-09-09 Mechadyne International Limited Moteur à combustion interne
DE102015016526A1 (de) 2015-12-19 2017-06-22 Daimler Ag Verfahren zum Betreiben einer Hubkolben-Verbrennungskraftmaschine
DE102017201343A1 (de) 2017-01-27 2018-08-02 Mahle International Gmbh Ventiltrieb für eine Hubkolbenbrennkraftmaschine und Verfahren zur Ventilsteuerung in einer Hubkolbenbrennkraftmaschine
CN107023342B (zh) * 2017-06-07 2020-05-19 大连理工大学 一种变模式气门驱动系统
CN107100686B (zh) * 2017-06-07 2020-04-14 大连理工大学 一种单凸轮轴开关支点式变模式气门驱动系统
CN107060941B (zh) * 2017-06-07 2020-05-19 大连理工大学 一种双凸轮轴开关支点式变模式气门驱动系统
DE102019113746A1 (de) * 2019-05-23 2020-11-26 Volkswagen Aktiengesellschaft Brennkraftmaschine mit variabler Auslassventilbetätigung

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Also Published As

Publication number Publication date
WO2008098991A1 (fr) 2008-08-21
EP2118454A1 (fr) 2009-11-18
DE102007007758A1 (de) 2008-08-21
JP2010518322A (ja) 2010-05-27
US9080472B2 (en) 2015-07-14
ATE466171T1 (de) 2010-05-15
JP5398548B2 (ja) 2014-01-29
DE502008000602D1 (de) 2010-06-10
US20100212625A1 (en) 2010-08-26

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