EP2877717B1 - Procédé de fonctionnement d'un moteur à combustion interne à commande de soupape électrohydraulique - Google Patents

Procédé de fonctionnement d'un moteur à combustion interne à commande de soupape électrohydraulique Download PDF

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Publication number
EP2877717B1
EP2877717B1 EP13758723.4A EP13758723A EP2877717B1 EP 2877717 B1 EP2877717 B1 EP 2877717B1 EP 13758723 A EP13758723 A EP 13758723A EP 2877717 B1 EP2877717 B1 EP 2877717B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
valve
internal combustion
combustion engine
gas exchange
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
EP13758723.4A
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German (de)
English (en)
Other versions
EP2877717A1 (fr
Inventor
Emin SENGÜL
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
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Schaeffler Technologies AG and Co KG
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Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2877717A1 publication Critical patent/EP2877717A1/fr
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Publication of EP2877717B1 publication Critical patent/EP2877717B1/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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • 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
    • 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
    • F01L9/12—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 with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
    • F01L9/14—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 with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • WO 2011/069836 A1 is a generic method for operating an internal combustion engine known.
  • a gas exchange valve lift required for the charge cycle is to be regulated within a minimum lift height and a maximum closing time.
  • a hydraulic valve is switched so that only a partial volume is filled in a pressure chamber with pressure medium and thus the gas exchange valve is only partially actuated.
  • the object of the invention is the advantageous development of the generic method for improving the starting behavior and in particular the cold start behavior of an internal combustion engine.
  • the proposed method is provided for operating an internal combustion engine with an electro-hydraulic valve control for the variable-stroke drive of a spring-loaded in the closing direction gas exchange valve.
  • the electro-hydraulic valve control includes a camshaft and arranged in the drive sense between the camshaft and the gas exchange valve Hydraulic system.
  • the hydraulic system is connected to a pressure medium supply of the internal combustion engine. From a cam of the camshaft, a first hydraulic piston is driven.
  • the gas exchange valve is driven in the opening direction by a second hydraulic piston.
  • a pressure chamber is provided between the hydraulic piston.
  • a control channel connects the pressure chamber to a pressure relief chamber.
  • an electrically controlled hydraulic valve is arranged, which allows a pressure medium flow through the control channel in the open position of the hydraulic valve and locks in the closed position.
  • the hydraulic valve is controlled by an electronic drive means as a function of operating parameters of the internal combustion engine.
  • the hydraulic valve is closed and reopened at least once between two immediately successive strokes of the first hydraulic piston.
  • the closed during a stroke of the first hydraulic piston hydraulic valve can be opened again before a maximum lift of the gas exchange valve.
  • the refilling of the pressure chamber is improved with pressure medium. Furthermore, by opening and closing the hydraulic valve between two immediately successive strokes, the hydraulic system is heated by converting electrical energy of the electrically controlled hydraulic valve into heat and supplied to the valve piston, the valve seat of the hydraulic valve and the pressure medium.
  • FIG. 1 shows a schematic diagram of a known electro-hydraulic valve control 1.
  • the valve control 1 is used for variable stroke drive in the closing direction by a valve spring 2 kraftbeaufschlagten gas exchange valve 3 of an internal combustion engine 4.
  • the cam 5 On the camshaft 6, the cam 5 is arranged, by means of the tappet 7, the first hydraulic piston 8 drives.
  • the second hydraulic piston 9 drives the gas exchange valve 3 in the form of an inlet or outlet valve in its opening direction.
  • the pressure relief chamber 11 is connected by means of the control channel 12 to the pressure chamber 10 and contains the spring-loaded pressure accumulator 13.
  • the arranged in the drive sense between the camshaft 6 and the gas exchange valve 3 hydraulic system is connected to the pressure medium supply 14 of the engine 4 and here at the lubricant circuit.
  • the electrically controlled hydraulic valve 15 is arranged in the design of a 2/2-way switching valve.
  • the hydraulic valve 15 is open in the non-energized state and allows a pressure medium flow through the control channel 12 to. In the energized state, the hydraulic valve 15 locks the control channel 12.
  • the electrical control of the hydraulic valve 15 takes place in Dependence on operating parameters of the internal combustion engine 4 by means of the electronic control means 16.
  • the drive means 16 may be integrated in the engine control unit.
  • valve control 1 The known operation of the valve control 1 can be summarized to the effect that the pressure medium located in the pressure chamber 10 acts as a hydraulic linkage.
  • the predetermined by the cam 5 stroke of the first hydraulic piston 8 is transmitted with closed hydraulic valve 15 by means of the second hydraulic piston 9 to the gas exchange valve 3.
  • the hydraulic valve 15 When the hydraulic valve 15 is open, the pressure medium is partially or completely displaced into the pressure relief chamber 11.
  • the hydraulic decoupling of the cam lift and the Gas demoventilhubs requires the hydraulic valve brake 17, which restricts the pressure fluid displaced back from the second hydraulic piston 9 and thus brakes the closing gas exchange valve 3 to a mechanically and acoustically acceptable contact velocity on the valve seat 18.
  • FIGS. 2 and 3 illustrated sequences 20, 21 explained in more detail above the crankshaft angle ⁇ . These each show the course 22 of the stroke of the first hydraulic piston 8 and the courses 23, 24 of the stroke of the gas exchange valve 3 and the courses of the energizations 28, 29, 30 of the hydraulic valve 15 during a starting phase of the internal combustion engine.
  • FIG. 2 shows the sequence 20, which is applied during the first crankshaft revolutions during cold start of the internal combustion engine 4.
  • the hydraulic valve 15 is closed by means of the current supply 28 between two immediately successive Hubverêtn 22, 23 and is subsequently opened in the angular range .DELTA. ⁇ 1 again.
  • the hydraulic valve 15 is closed by means of the current 29.
  • the energization is switched off and the hydraulic valve 15 is opened again, so that the gas exchange valve 3 remains open only over a shortened angle range.
  • pressure changes in the pressure chamber 10 this is at least partially emptied and in the angular range ⁇ 2 , in the base circle of the cam 5 to the renewed Current supply 28 of the hydraulic valve 15 extends, filled with still open hydraulic valve 15 due to the pressure changes occurring again.
  • the FIG. 3 shows the sequence 21, the alternative to the sequence 20 or after performing a predetermined number of sequences 20 of the FIG. 2 over a predetermined number of camshaft revolutions is performed.
  • the sequence 21 has a prolonged energization 30 during the entire stroke of the first hydraulic piston 8.
  • the gas exchange valve 3 remains open longer and there are each of two energys 28, 30 limited angular ranges ⁇ 1 for refilling the pressure chamber 10 a.
  • the number of energizations 28 between two immediately successive strokes of the first hydraulic piston 8, the extent of the angular ranges ⁇ 1 , ⁇ 2 and the duration of the energization 29 can be adapted to parameters of the internal combustion engine, the pressure medium and the valve train.

Landscapes

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

Claims (2)

  1. Procédé pour faire fonctionner un moteur à combustion interne (4) avec une commande de soupape électrohydraulique (1) pour l'entraînement à course variable d'une soupape d'échange de gaz (3) sollicitée par la force d'un ressort dans la direction de fermeture, contenant un arbre à cames (6) et un système hydraulique disposé dans le sens de l'entraînement entre l'arbre à cames (6) et la soupape d'échange de gaz (3), qui est raccordé à une alimentation en fluide sous pression (14) du moteur à combustion interne (4), un premier piston hydraulique (8) entraîné par la came (5) de l'arbre à cames (6) et un deuxième piston hydraulique (9) entraînant la soupape d'échange de gaz (3) dans la direction de l'ouverture, un espace de pression (10) limité par le premier piston hydraulique (8) et le deuxième piston hydraulique (9) avec un volume variable et un canal de commande (12) reliant l'espace de pression (10) à un espace de détente de pression (11), une soupape hydraulique à commande électrique (15) disposée dans le canal de commande (12), qui permet un afflux de fluide hydraulique à travers le canal de commande (12) dans la position ouverte de la soupape hydraulique (15) et qui le bloque dans la position de fermeture de la soupape hydraulique (15), et un moyen de commande électronique (16) pour commander la soupape hydraulique (15) en fonction de paramètres de fonctionnement du moteur à combustion interne (4), caractérisé en ce que pendant une phase de démarrage du moteur à combustion interne (4), la soupape hydraulique (15) est au moins une fois fermée et à nouveau ouverte entre deux courses directement successives du premier piston hydraulique (8).
  2. Procédé selon la revendication 1, caractérisé en ce que pendant la phase de démarrage, la soupape hydraulique (15) fermée pendant une course du premier piston hydraulique (8) est à nouveau ouverte avant une course maximale (h(max)) de la soupape d'échange de gaz (3).
EP13758723.4A 2012-07-24 2013-07-24 Procédé de fonctionnement d'un moteur à combustion interne à commande de soupape électrohydraulique Active EP2877717B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012212989.8A DE102012212989A1 (de) 2012-07-24 2012-07-24 Verfahren zum Betrieb einer Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung
PCT/DE2013/200072 WO2014015869A1 (fr) 2012-07-24 2013-07-24 Procédé de fonctionnement d'un moteur à combustion interne à commande de soupape électrohydraulique

Publications (2)

Publication Number Publication Date
EP2877717A1 EP2877717A1 (fr) 2015-06-03
EP2877717B1 true EP2877717B1 (fr) 2016-06-08

Family

ID=49117605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13758723.4A Active EP2877717B1 (fr) 2012-07-24 2013-07-24 Procédé de fonctionnement d'un moteur à combustion interne à commande de soupape électrohydraulique

Country Status (5)

Country Link
US (1) US9435231B2 (fr)
EP (1) EP2877717B1 (fr)
CN (1) CN104619960B (fr)
DE (1) DE102012212989A1 (fr)
WO (1) WO2014015869A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9464590B2 (en) 2014-04-16 2016-10-11 Fca Us Llc Variable stroke direct injection fuel pump system
CN109653829B (zh) * 2018-12-26 2020-10-23 王自勤 一种气门滞后角的电液调控方法及装置
EP3715594B1 (fr) * 2019-03-29 2021-10-27 ABB Schweiz AG Commande de soupape pourvue d'élément retardeur hydraulique pour un moteur à combustion interne
US11566545B2 (en) 2019-05-02 2023-01-31 Caterpillar Inc. Cam actuated gas admission valve with electro-hydraulic trim control

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664070A (en) * 1985-12-18 1987-05-12 The Jacobs Manufacturing Company Hydro-mechanical overhead for internal combustion engine
US5537976A (en) * 1995-08-08 1996-07-23 Diesel Engine Retarders, Inc. Four-cycle internal combustion engines with two-cycle compression release braking
ITTO20020149A1 (it) 2002-02-21 2003-08-21 C R F Societa Con Sortile Per Motore pluricilindrico a combustione interna con dispositivo idraulico a controllo elettronico per l'azionamento variabile delle valvole, in
ITTO20020234A1 (it) * 2002-03-15 2003-09-15 Fiat Ricerche Motore pluricilindrico a combustione interna con dispositivo idraulico a controllo elettronico per l'azionamento variabile delle valvole e d
ITTO20020568A1 (it) 2002-07-01 2004-01-02 Fiat Ricerche Motore a combustione interna con sistema idraulico a controllo elettronico per l'azionamento delle valvole e mezzi per compensare i cambiame
ITTO20020571A1 (it) 2002-07-01 2004-01-02 Fiat Ricerche Motore a combustione interna con due valvole di aspirazione per ciascun cilindro e sistema a controllo elettronico per azionare le due valvo
EP1555398B1 (fr) * 2004-01-16 2007-02-28 C.R.F. Società 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
CN201100150Y (zh) * 2007-09-08 2008-08-13 冯子光 一种发动机的气门驱动配气装置
CN101509404B (zh) * 2008-02-15 2011-05-18 蔡学功 可变气门系统
ATE520866T1 (de) * 2008-11-07 2011-09-15 Fiat Ricerche Dieselmotor mit nocken zum betätigen von einlassventilen, welche einen hauptnocken und einen hilfsnocken, die miteinander verbunden sind,aufweisen
EP2204566B1 (fr) 2008-12-29 2011-06-29 Fiat Group Automobiles S.p.A. Système de côntrole adaptatif du rapport air-carburant d'un moteur de combustion interne avec une système de distribution variable
ATE534806T1 (de) 2009-06-30 2011-12-15 Fiat Ricerche Hydraulisches system unter elektronischer kontrolle zur variablen betätigung der ventile einer brennkraftmaschine, mit schneller befüllung der hochdrukteils des systems
BR112012013125B1 (pt) 2009-12-08 2021-01-12 Schaeffler Technologies AG & Co. KG motor de combustão com comando de válvula eletro-hidráulico, e processo para operar o motor de combustão com comando de válvula eletro-hidráulico
DE102011051487B4 (de) * 2010-11-12 2017-01-12 Hyundai Motor Co. Elektrohydraulische Ventilsteuerung

Also Published As

Publication number Publication date
US20150176439A1 (en) 2015-06-25
CN104619960B (zh) 2017-06-27
CN104619960A (zh) 2015-05-13
EP2877717A1 (fr) 2015-06-03
DE102012212989A1 (de) 2014-01-30
US9435231B2 (en) 2016-09-06
WO2014015869A1 (fr) 2014-01-30

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