EP1375843A1 - Moteur à combustion interne - Google Patents

Moteur à combustion interne Download PDF

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Publication number
EP1375843A1
EP1375843A1 EP02450145A EP02450145A EP1375843A1 EP 1375843 A1 EP1375843 A1 EP 1375843A1 EP 02450145 A EP02450145 A EP 02450145A EP 02450145 A EP02450145 A EP 02450145A EP 1375843 A1 EP1375843 A1 EP 1375843A1
Authority
EP
European Patent Office
Prior art keywords
valve
cam
internal combustion
combustion engine
hydraulic
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.)
Granted
Application number
EP02450145A
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German (de)
English (en)
Other versions
EP1375843B1 (fr
Inventor
Johannes Rieger
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.)
AVL List GmbH
Original Assignee
AVL List 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 AVL List GmbH filed Critical AVL List GmbH
Priority to EP02450145A priority Critical patent/EP1375843B1/fr
Priority to DE50200400T priority patent/DE50200400D1/de
Publication of EP1375843A1 publication Critical patent/EP1375843A1/fr
Application granted granted Critical
Publication of EP1375843B1 publication Critical patent/EP1375843B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L13/0005—Deactivating valves
    • 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
    • F01L13/0047—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 the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column

Definitions

  • the invention relates to an internal combustion engine with at least one internal combustion a cylinder and with at least one gas exchange valve that passes through a first camshaft over a first cam and through a second camshaft is controlled via a second cam, at least one camshaft to change the timing of the gas exchange valve in its phase position is adjustable.
  • EP 0 596 860 A describes a method and a device for modification the valve timing known, in which each cam consists of two half-cams composed, which are rotatable against each other. That way it is possible to change the valve opening duration. Independently around the half-cams To be able to adjust from each other is within a hollow drilled camshaft an inner shaft is provided which is rotatable relative to the camshaft is. In this way, both the beginning of the valve opening and also the end of the valve opening within certain limits independently of one another can be set, but the valve lift is still predetermined, and in addition, the device is complex and expensive.
  • the object of the present invention is to provide an internal combustion engine with a Specify valve control that avoids these disadvantages and great degrees of freedom when setting the valve opening times and when lifting the valve movement allows.
  • the mechanical effort should be as low as possible be so that cost-effective production and maintenance can be achieved can.
  • Another object of the invention is to provide a solution for which can also be implemented in a simple manner, provided that this is necessary.
  • the first cam on a first hydraulic member acts and the second cam acts on a second hydraulic element, which two hydraulic elements act together on a third hydraulic element, that actuates the gas exchange valve.
  • hydraulic members which are preferably designed as hydraulic cylinders
  • a simplification of the mechanical structure can be achieved and on the other hand the height of the valve lift can also be influenced.
  • the circuit of the hydraulic links is preferred in such a way that the gas exchange valve only opens when actuation by the first cam and the second cam simultaneously is present.
  • the cam contours are designed so that, for example, the first cam the first hydraulic link before the earliest possible valve opening time applied. This means that only the second cam is the actual one Valve opening initiated.
  • the second cam is again designed that even at the latest possible valve closing time, that second hydraulic element still applied, so that the valve is closed, when the first cam ends the application of the first hydraulic element.
  • valve lift can also be reduced in a simple manner become.
  • it is a simplified embodiment of the invention also possible to make only one of the two camshafts adjustable, so that For example, the valve opening time is fixed, but the valve closing time can be changed.
  • the full advantages of the invention, however only achieved when both camshafts are independently adjustable are.
  • a structurally particularly favorable solution of the invention is given if the first cam via a first rocker arm and the second cam via one second rocker arm acts on the respective hydraulic link.
  • a particularly simple one Structure can be achieved if the first rocker arm and the second rocker arm are mounted on a common axis.
  • one of the rocker arms has a preferably adjustable driver for the has another rocker arm, whereby this is actuated when the latter is not actuated becomes.
  • the setting can be made using a screw on the driver, for example be realized, which enables the coordination of the rocker arm accordingly to change.
  • a valve shutdown can be implemented in a simple manner in that the gas exchange valve is only open when a switching valve is provided is configured to actuate the gas exchange valve prevention.
  • the present invention is basically for all types of internal combustion engines, So especially for internal combustion engines with spark ignition and self-igniting, suitable.
  • the valve control according to the invention can control both an inlet valve and an outlet valve as a gas exchange valve, or both intake valves and exhaust valves can be independent can be variably controlled from one another.
  • a particularly simple design of the internal combustion engine is achieved if the gas exchange valve from the first camshaft and from the second camshaft is controlled, is an intake valve and that is an exhaust valve from the first camshaft is controlled. This way you can use two camshafts for the control of the intake and exhaust valves, sufficiency can be found. In this case, the timing of the exhaust valve is fixed with the opening or coupled with the closing movement of the intake valve.
  • An internal combustion engine with three or more valves per cylinder can also be provided that the third hydraulic member on a valve bridge for actuation acts of several similar gas exchange valves. That way you can For example, two inlet valves can be opened and closed at the same time.
  • a further optimization of the present invention can be achieved by that the hydraulic device comprising the hydraulic members has a valve lash adjuster includes. Due to the leakage of the system without noticeable increase in effort the functionality of valve clearance compensation reached. In this way, the additional effort compared to a conventional one Internal combustion engine with valve clearance compensation kept within manageable limits become.
  • Fig. 1 is the essential part of an internal combustion engine with internal Combustion shown.
  • a cylinder not shown, is a gas exchange valve 1 assigned, which can be an intake valve or exhaust valve.
  • the gas exchange valve 1 by a valve spring 2, the is supported on a plate 3, biased into the closed position.
  • the hydraulic piston 5 delimits a working space 7, that with a first hydraulic cylinder 8 and a second hydraulic cylinder 9 is in flow connection.
  • first and second control pistons 10, 11 are each movably arranged.
  • the first piston 10 is actuated by a first rocker arm 12, which in turn is actuated by a first cam 14 which is on a first camshaft 16 is arranged.
  • the second piston 11 is one second rocker arm 13 and a second cam 15 on a second camshaft 17 operated.
  • the first and second rocker arms 12, 13 are on a common one Axis 18 mounted.
  • the first rocker arm 12 has a molded one Driver 19, which actuates the second rocker arm 13 when the first rocker arm 12 is not operated.
  • the work room 7 and the associated cylinder rooms 8, 9 connected to a switching valve 21 via a connecting line 20.
  • a connecting line 20 In The position shown in Fig. 1 is the connecting line 20 via a supply line 22, in which a check valve 23 is provided, with engine oil supplied from the engine oil circuit.
  • a foreign oil supply is also possible possible.
  • the switching valve 21 By switching the switching valve 21, the work area 7 are connected to the leakage oil system 24, whereby the valve actuation is prevented and valve shutdown is achieved.
  • FIG. 3 shows the variability of the valve train according to the invention represented by a diagram.
  • the Valve stroke h plotted in any units.
  • a first curve section referred to which corresponds to an early opening of the gas exchange valve 1.
  • the curve section 30 sets in the curve sections 31, 32 or 33, with 31 a very early closing, 32 corresponds to medium closing and 33 to late closing. It it can be seen that with early closing according to curve 31, the maximum valve lift h is not reached because the closing movement begins before the opening movement is completed.
  • broken lines further curves 40, 41, 42 and 43 entered, the curves 30, 31, 32 and 33 correspond, but there is a later valve opening time.
  • the Length of valve opening and stroke according to curves 41, 42 and 43 are identical to those in the case of curves 31, 32 and 33.
  • the curve 51 represents the elevation of the first cam 14, which alternates between n 0 , the base circle, and n 1 , the cam elevation.
  • the curve 52 represents the situation on the second cam 15, which changes between the basic position m 0 and the raised position m 1 .
  • t 0 which corresponds to a crank angle of 0 °
  • the first cam 14 is in the raised position n 1
  • the second cam 15 is in the basic position m 0 . Accordingly, the gas exchange valve 1 is in its closed position.
  • the rising edge begins at second cam 15, which continues until time t 2 , in which second cam 15 has reached the raised position m 1 .
  • This time period between t 1 and t 2 corresponds to the opening movement of the gas exchange valve 1.
  • both cams 14, 15 remain in the raised position n 1 , m 1 , and the gas exchange valve 1 remains completely open.
  • the first cam 14 sinks to its base circle at n o , and accordingly the gas exchange valve 1 closes and is completely closed from time t 4 .
  • the descending flank of the second cam 15 begins at an arbitrary point in time t 5 , which in any case must be after the latest possible point in time t 4 , as can be seen from curve 52.
  • the driver 19 of the first rocker arm 12 holds down the second rocker arm 13, it lifts off the second cam 15, so that a fictitious cam curve 53 results, which is shown with dash-dotted lines.
  • the time t 6 corresponds to the reaching of the base circle of the second cam 15, but this is meaningless for the system.
  • Only at a point in time t 7 does the rising flank of the first cam 14 begin with a corresponding movement of the first rocker arm 12, as a result of which the driver 19 accordingly releases the second rocker arm 13 until it finally rests on the second cam 15.
  • time t 8 which corresponds to 720 ° crank angle, this movement has ended and a new work cycle begins at t 0 .
  • the present invention makes it possible in a simple manner to control the valve timing with great degrees of freedom.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP02450145A 2002-06-28 2002-06-28 Moteur à combustion interne Expired - Lifetime EP1375843B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02450145A EP1375843B1 (fr) 2002-06-28 2002-06-28 Moteur à combustion interne
DE50200400T DE50200400D1 (de) 2002-06-28 2002-06-28 Brennkraftmaschine mit innerer Verbrennung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02450145A EP1375843B1 (fr) 2002-06-28 2002-06-28 Moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP1375843A1 true EP1375843A1 (fr) 2004-01-02
EP1375843B1 EP1375843B1 (fr) 2004-04-28

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Family Applications (1)

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EP02450145A Expired - Lifetime EP1375843B1 (fr) 2002-06-28 2002-06-28 Moteur à combustion interne

Country Status (2)

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EP (1) EP1375843B1 (fr)
DE (1) DE50200400D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555398A1 (fr) * 2004-01-16 2005-07-20 C.R.F. Societa' Consortile per Azioni Moteur à combustion interne à simple arbre à cames commandant les soupapes d'échappement de façon mécanique, et les soupapes d'admission à l'aide d'un dispositif hydraulique à commande electronique
WO2006000004A2 (fr) * 2004-06-24 2006-01-05 Avl List Gmbh Moteur a combustion interne
AT500600B1 (de) * 2004-07-20 2007-09-15 Avl List Gmbh Brennkraftmaschine mit innerer verbrennung
EP2574746A1 (fr) * 2011-09-30 2013-04-03 Hyundai Motor Company Système de soupape variable
WO2013114041A1 (fr) * 2012-02-02 2013-08-08 Melchior Jean F Dispositif de commande variable d'au moins une soupape, par exemple pour un moteur alternatif
EP3184761A1 (fr) * 2015-12-24 2017-06-28 C.R.F. Società Consortile per Azioni Système d'actionnement variable d'une soupape d'un moteur à combustion interne

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480854A1 (fr) * 1980-04-22 1981-10-23 Renault Commande de soupapes de moteurs a combustion interne par distributeur hydraulique a faible consommation de puissance
US4716863A (en) * 1985-11-15 1988-01-05 Pruzan Daniel A Internal combustion engine valve actuation system
GB2241552A (en) * 1990-01-26 1991-09-04 David John Baker Cam mechanism for operating the valve of an i.c. engine
DE4018586A1 (de) * 1990-06-09 1991-12-12 Audi Ag Zylinderkopf fuer eine ventilgesteuerte hubkolben-brennkraftmaschine
DE4236600A1 (de) * 1992-10-29 1994-05-05 Audi Ag Ventilbetätigungsmechanismus
EP0596860A2 (fr) 1986-02-19 1994-05-11 Clemson University Méthode pour varier le calage des soupapes d'un moteur à combustion interne
EP0909882A2 (fr) 1997-10-16 1999-04-21 DaimlerChrysler AG Commande variable de soupape pour moteurs à combustion interne et à pistons
WO2002048510A2 (fr) * 2000-12-15 2002-06-20 Melchior Jean F Dispositif de distribution variable pour moteurs alternatifs, moteurs le comportant et procede de distribution et de turbocompression

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480854A1 (fr) * 1980-04-22 1981-10-23 Renault Commande de soupapes de moteurs a combustion interne par distributeur hydraulique a faible consommation de puissance
US4716863A (en) * 1985-11-15 1988-01-05 Pruzan Daniel A Internal combustion engine valve actuation system
EP0596860A2 (fr) 1986-02-19 1994-05-11 Clemson University Méthode pour varier le calage des soupapes d'un moteur à combustion interne
GB2241552A (en) * 1990-01-26 1991-09-04 David John Baker Cam mechanism for operating the valve of an i.c. engine
DE4018586A1 (de) * 1990-06-09 1991-12-12 Audi Ag Zylinderkopf fuer eine ventilgesteuerte hubkolben-brennkraftmaschine
DE4236600A1 (de) * 1992-10-29 1994-05-05 Audi Ag Ventilbetätigungsmechanismus
EP0909882A2 (fr) 1997-10-16 1999-04-21 DaimlerChrysler AG Commande variable de soupape pour moteurs à combustion interne et à pistons
WO2002048510A2 (fr) * 2000-12-15 2002-06-20 Melchior Jean F Dispositif de distribution variable pour moteurs alternatifs, moteurs le comportant et procede de distribution et de turbocompression

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555398A1 (fr) * 2004-01-16 2005-07-20 C.R.F. Societa' Consortile per Azioni Moteur à combustion interne à simple arbre à cames commandant les soupapes d'échappement de façon mécanique, et les soupapes d'admission à l'aide d'un dispositif hydraulique à commande electronique
US6981476B2 (en) 2004-01-16 2006-01-03 C.R.F. Societa Consortile Per Azioni Internal combustion engine with a single camshaft which controls exhaust valves mechanically and intake valves through an electronically controlled hydraulic device
WO2006000004A2 (fr) * 2004-06-24 2006-01-05 Avl List Gmbh Moteur a combustion interne
WO2006000004A3 (fr) * 2004-06-24 2006-07-13 Avl List Gmbh Moteur a combustion interne
US7685977B2 (en) 2004-06-24 2010-03-30 Avl List Gmbh Internal combustion engine
AT500600B1 (de) * 2004-07-20 2007-09-15 Avl List Gmbh Brennkraftmaschine mit innerer verbrennung
EP2574746A1 (fr) * 2011-09-30 2013-04-03 Hyundai Motor Company Système de soupape variable
US8973540B2 (en) 2011-09-30 2015-03-10 Hyundai Motor Company Variable valve system
FR2986558A1 (fr) * 2012-02-02 2013-08-09 Melchior Jean F Dispositif de commande variable d'au moins une soupape, par exemple pour un moteur alternatif
KR20140120334A (ko) * 2012-02-02 2014-10-13 쟝 프레데릭 멜키오르 왕복엔진용 밸브의 가변 제어 장치
WO2013114041A1 (fr) * 2012-02-02 2013-08-08 Melchior Jean F Dispositif de commande variable d'au moins une soupape, par exemple pour un moteur alternatif
US9181823B2 (en) 2012-02-02 2015-11-10 Jean Frederic Melchior Device for the variable control of at least one valve, for example for a reciprocating engine
KR102000119B1 (ko) 2012-02-02 2019-07-15 쟝 프레데릭 멜키오르 왕복엔진용 밸브의 가변 제어 장치
EP3184761A1 (fr) * 2015-12-24 2017-06-28 C.R.F. Società Consortile per Azioni Système d'actionnement variable d'une soupape d'un moteur à combustion interne
JP2017115852A (ja) * 2015-12-24 2017-06-29 シー．アール．エフ． ソシエタ コンソルティレ ペル アツィオニ 内燃エンジンのバルブの可変的な作動のためのシステム
US10364712B2 (en) 2015-12-24 2019-07-30 C.R.F. Societa Consortile Per Azioni System for variable actuation of a valve of an internal-combustion engine

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Publication number Publication date
EP1375843B1 (fr) 2004-04-28
DE50200400D1 (de) 2004-06-03

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