EP2060754A3 - Hydraulic unit for a cylinder head for a combustion engine with a variable valve stroke - Google Patents

Hydraulic unit for a cylinder head for a combustion engine with a variable valve stroke Download PDF

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Publication number
EP2060754A3
EP2060754A3 EP08167285A EP08167285A EP2060754A3 EP 2060754 A3 EP2060754 A3 EP 2060754A3 EP 08167285 A EP08167285 A EP 08167285A EP 08167285 A EP08167285 A EP 08167285A EP 2060754 A3 EP2060754 A3 EP 2060754A3
Authority
EP
European Patent Office
Prior art keywords
hydraulic unit
combustion engine
cylinder head
variable valve
pressure space
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
EP08167285A
Other languages
German (de)
French (fr)
Other versions
EP2060754B1 (en
EP2060754A2 (en
Inventor
Markus Proschko
Martin Rauch
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
Priority to DE102007054376A priority Critical patent/DE102007054376A1/en
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2060754A2 publication Critical patent/EP2060754A2/en
Publication of EP2060754A3 publication Critical patent/EP2060754A3/en
Application granted granted Critical
Publication of EP2060754B1 publication Critical patent/EP2060754B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11Valve-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
    • F01L9/12Valve-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
    • F01L9/14Valve-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-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
    • F01L1/344Valve-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
    • F01L1/3442Valve-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 hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423Details relating to the hydraulic feeding circuit
    • F01L2001/34446Fluid accumulators for the feeding circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00Details on specific features characterising valve gear arrangements
    • F01L2820/02Formulas

Abstract

Vorgeschlagen ist eine Hydraulikeinheit (5) für einen Zylinderkopf (2) einer Brennkraftmaschine mit hydraulisch variablem Ventiltrieb (1). In der Hydraulikeinheit sind ein Hochdruckraum (11), ein Mitteldruckraum (12) und zusätzlich ein als Hydraulikmittelreservoir dienender Niederdruckraum (16) ausgebildet. Der Niederdruckraum kommuniziert lediglich über eine Drosselöffnung (17) mit dem Mitteldruckraum, wobei die Drosselöffnung eine zwischen dem Niederdruckraum und dem Mitteldruckraum verlaufende Trennwand (18) durchsetzt.
Figure imgaf001
Proposed is a hydraulic unit (5) for a cylinder head (2) of an internal combustion engine with a hydraulically variable valve train (1). In the hydraulic unit, a high-pressure chamber (11), a medium-pressure chamber (12) and in addition a low-pressure space (16) serving as a hydraulic fluid reservoir are formed. The low-pressure space communicates only via a throttle opening (17) with the medium-pressure space, the throttle opening passing through a partition wall (18) running between the low-pressure space and the medium-pressure space.
EP08167285A 2007-11-14 2008-10-22 Hydraulic unit for a cylinder head for a combustion engine with a variable valve stroke Active EP2060754B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102007054376A DE102007054376A1 (en) 2007-11-14 2007-11-14 Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable valve train

Publications (3)

Publication Number Publication Date
EP2060754A2 EP2060754A2 (en) 2009-05-20
EP2060754A3 true EP2060754A3 (en) 2010-05-05
EP2060754B1 EP2060754B1 (en) 2011-12-14

Family

ID=40345032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08167285A Active EP2060754B1 (en) 2007-11-14 2008-10-22 Hydraulic unit for a cylinder head for a combustion engine with a variable valve stroke

Country Status (6)

Country Link
US (1) US8020526B2 (en)
EP (1) EP2060754B1 (en)
JP (1) JP5354260B2 (en)
KR (1) KR101515636B1 (en)
CN (1) CN101435353B (en)
DE (1) DE102007054376A1 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009011982A1 (en) 2009-03-05 2010-09-09 Schaeffler Technologies Gmbh & Co. Kg Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable gas exchange valve drive
DE102009011983A1 (en) 2009-03-05 2010-09-09 Schaeffler Technologies Gmbh & Co. Kg Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable gas exchange valve drive
EP2261471B1 (en) * 2009-05-25 2014-09-17 C.R.F. Società Consortile per Azioni Internal combustion engine with two hydraulically actuated intake valves with different return springs for each cylinder
AT534806T (en) * 2009-06-30 2011-12-15 Fiat Ricerche HYDRAULIC SYSTEM UNDER ELECTRONIC CONTROL FOR THE VARIABLE OPERATION OF THE VALVES OF AN INTERNAL COMBUSTION ENGINE, WITH FAST FILLING OF THE HIGH-PRESSURE PARTS OF THE SYSTEM
US9212573B2 (en) 2009-12-08 2015-12-15 Schaeffler Technologies AG & Co. KG Internal combustion engine having electrohydraulic valve control and method for operating said internal combustion engine
DE102010013927B4 (en) * 2010-04-06 2019-03-21 Schaeffler Technologies AG & Co. KG Internal combustion engine with two fluid-tightly separated lubrication chambers
DE102010018209A1 (en) 2010-04-26 2011-10-27 Schaeffler Technologies Gmbh & Co. Kg Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable gas exchange valve drive
DE102010024028A1 (en) 2010-06-16 2011-12-22 Schaeffler Technologies Gmbh & Co. Kg Hydraulic unit for cylinder head of internal combustion engine, comprises variable hydraulic gas exchange valve drive, which has hydraulic housing with drive-side transmitter unit
DE102010052550A1 (en) * 2010-11-25 2012-05-31 Schaeffler Technologies Gmbh & Co. Kg Accumulator of a hydraulic actuation system
CN102278161B (en) * 2011-07-19 2013-07-24 天津大学 Cushioning hydraulic cylinder for variable valve
DE102012200469A1 (en) * 2012-01-13 2013-07-18 Schaeffler Technologies AG & Co. KG Actuator for fully variable valve train system for motor car, has rocker lever whose transport lock is secured at actuator housing for closing the cover, and transport lock that is made of plastic
DE102012212860B3 (en) * 2012-07-23 2013-12-12 Schaeffler Technologies AG & Co. KG Method for determining the filling of the cylinders of reciprocating internal combustion engines
DE102012221354A1 (en) 2012-11-22 2013-01-24 Schaeffler Technologies AG & Co. KG Hydraulic unit for cylinder head of internal combustion engine with hydraulically variable gas exchange valve train, has hydraulic connection, which is provided between high pressure chamber and medium-pressure chamber
DE102013213695A1 (en) * 2013-07-12 2015-01-15 Schaeffler Technologies Gmbh & Co. Kg Device for venting cavities
SE540359C2 (en) * 2013-10-16 2018-08-07 Freevalve Ab Internal combustion engine
US9217339B2 (en) 2014-04-24 2015-12-22 Ford Global Technologies, Llc Hydraulic rolling cylinder deactivation systems and methods
US9631526B2 (en) * 2014-09-17 2017-04-25 Fca Us Llc Engine variable valve lift system having integrated hydraulic fluid retention
DE102014219736A1 (en) 2014-09-30 2016-03-31 Schaeffler Technologies AG & Co. KG Valve gear of an internal combustion engine
DE102016218784A1 (en) * 2015-10-26 2017-04-27 Schaeffler Technologies AG & Co. KG Valve control actuator with iron accumulation solenoid in oil line
US10612474B2 (en) 2016-03-31 2020-04-07 Mazda Motor Corporation Controller for multi-cylinder engine
JP6350975B2 (en) * 2016-03-31 2018-07-04 マツダ株式会社 Engine control device
GB2553120B (en) * 2016-08-24 2019-12-25 Jaguar Land Rover Ltd Variable valve lift system with a diffusing system
DE102016218918B4 (en) 2016-09-29 2018-09-13 Schaeffler Technologies AG & Co. KG Internal combustion engine with hydraulically variable gas exchange valve drive
DE102016219297A1 (en) 2016-10-05 2018-04-05 Schaeffler Technologies AG & Co. KG Hydraulic unit for an internal combustion engine with hydraulically variable gas exchange valve drive
DE102018129287A1 (en) 2018-11-21 2020-05-28 Schaeffler Technologies AG & Co. KG Internal combustion engine with hydraulically variable gas exchange valve train

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3604233A1 (en) * 1986-02-11 1987-08-13 Bosch Gmbh Robert Valve control device for a reciprocating piston internal combustion engine
JPH02221610A (en) * 1989-02-22 1990-09-04 Honda Motor Co Ltd Valve system of internal combustion engine
JPH04301104A (en) * 1991-03-28 1992-10-23 Honda Motor Co Ltd Hydraulic driving unit of engine valve for internal combustion engine
DE4206696A1 (en) * 1992-03-04 1993-09-09 Bosch Gmbh Robert Hydraulic lifter for vehicle IC engine - has oil supply diverted from main oil circuit through rapidly-closing solenoid valve to intake valve control unit
EP1243761A1 (en) * 2001-03-23 2002-09-25 C.R.F. Società Consortile per Azioni Internal-combustion engine with hydraulic system for variable operation of the valves and means for compensating variations in volume of the hydraulic fluid
EP1353056A1 (en) * 2002-04-09 2003-10-15 Eaton Corporation An electro-hydraulic manifold assembly and method of making same for controlling de-activation of combustion chamber valves in a multicylinder engine
EP1362990A2 (en) * 2002-05-14 2003-11-19 Caterpillar Inc. Engine valve actuation system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6415752B1 (en) * 1999-09-17 2002-07-09 Diesel Engine Retarders, Inc. Captive volume accumulator for a lost motion system
DE10161438B4 (en) * 2001-12-14 2004-07-15 Man B&W Diesel A/S reciprocating engine
DE102006008676A1 (en) 2006-02-24 2007-08-30 Schaeffler Kg Cylinder head for internal combustion engine of vehicle, has filling device for initial filling of pressure discharge chamber and/or pressure chamber with hydraulic medium, where device is formed at housing

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3604233A1 (en) * 1986-02-11 1987-08-13 Bosch Gmbh Robert Valve control device for a reciprocating piston internal combustion engine
JPH02221610A (en) * 1989-02-22 1990-09-04 Honda Motor Co Ltd Valve system of internal combustion engine
JPH04301104A (en) * 1991-03-28 1992-10-23 Honda Motor Co Ltd Hydraulic driving unit of engine valve for internal combustion engine
DE4206696A1 (en) * 1992-03-04 1993-09-09 Bosch Gmbh Robert Hydraulic lifter for vehicle IC engine - has oil supply diverted from main oil circuit through rapidly-closing solenoid valve to intake valve control unit
EP1243761A1 (en) * 2001-03-23 2002-09-25 C.R.F. Società Consortile per Azioni Internal-combustion engine with hydraulic system for variable operation of the valves and means for compensating variations in volume of the hydraulic fluid
EP1353056A1 (en) * 2002-04-09 2003-10-15 Eaton Corporation An electro-hydraulic manifold assembly and method of making same for controlling de-activation of combustion chamber valves in a multicylinder engine
EP1362990A2 (en) * 2002-05-14 2003-11-19 Caterpillar Inc. Engine valve actuation system

Also Published As

Publication number Publication date
JP5354260B2 (en) 2013-11-27
DE102007054376A1 (en) 2009-05-20
KR20090049999A (en) 2009-05-19
EP2060754B1 (en) 2011-12-14
KR101515636B1 (en) 2015-04-27
JP2009121481A (en) 2009-06-04
CN101435353B (en) 2013-03-27
US20090120389A1 (en) 2009-05-14
US8020526B2 (en) 2011-09-20
EP2060754A2 (en) 2009-05-20
CN101435353A (en) 2009-05-20

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