EP1843013A3 - Variable-actuation, electro-hydraulic system and device controlling the valves of internal combustion engines - Google Patents

Variable-actuation, electro-hydraulic system and device controlling the valves of internal combustion engines Download PDF

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Publication number
EP1843013A3
EP1843013A3 EP07105135A EP07105135A EP1843013A3 EP 1843013 A3 EP1843013 A3 EP 1843013A3 EP 07105135 A EP07105135 A EP 07105135A EP 07105135 A EP07105135 A EP 07105135A EP 1843013 A3 EP1843013 A3 EP 1843013A3
Authority
EP
European Patent Office
Prior art keywords
engine valve
chamber
state
cylinder
communication
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.)
Withdrawn
Application number
EP07105135A
Other languages
German (de)
French (fr)
Other versions
EP1843013A2 (en
Inventor
Pierluigi Dell'orto
Mario Marchetti
Eliodoro Chiavazzo
Gerardo Manganiello
Alessandro Di Gaeta
Giuseppe Police
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.)
Dell Orto SpA
Original Assignee
Dell Orto SpA
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 Dell Orto SpA filed Critical Dell Orto SpA
Publication of EP1843013A2 publication Critical patent/EP1843013A2/en
Publication of EP1843013A3 publication Critical patent/EP1843013A3/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F01L1/3442—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 hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34446—Fluid accumulators for the feeding circuit

Landscapes

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

Abstract

Control system of an electro-hydraulic device actuating the valves of internal combustion engines, comprising a cylinder-hydraulic piston assembly for each engine valve (3) to be actuated and means to transfer the piston displacement to the engine valve stem, means (10) to supply control fluid to the cylinder chamber (1) of said cylinder-piston assembly for actuating said piston (2) in the opening direction of the engine valve (3), in contrast to spring means (4) which recall said engine valve (3) into the closed position thereof. The cylinder chamber (1) is put in communication, alternately, on one side with a high pressure source (HP) and, on the other side, with a low pressure chamber (LP), through a single, 3-way servovalve (10), which is switched into a "state b" for putting the chamber (1) in communication with the high pressure source (HP), for a time (T1) corresponding to an initial part only of the opening run of the engine valve (3) or, alternatively, into a "state a", for putting said chamber (1) in communication with the low pressure (LP), for an initial part only of the closing run of the engine valve (3). The 3-way valve (10) comprises a shutter valve (12), slidable between a home position ("state a") and an active position ("state b") under the action of a pressure differential acting on the opposite sides thereof, and of a control electromagnet (21).
EP07105135A 2006-03-30 2007-03-28 Variable-actuation, electro-hydraulic system and device controlling the valves of internal combustion engines Withdrawn EP1843013A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000608A ITMI20060608A1 (en) 2006-03-30 2006-03-30 SYSTEMS AND ELECTRO-HYDRAULIC CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE VALVES WITH VARIABLE DRIVE WITH SINGLE THREE-WAY SOLENOID VALVE

Publications (2)

Publication Number Publication Date
EP1843013A2 EP1843013A2 (en) 2007-10-10
EP1843013A3 true EP1843013A3 (en) 2009-09-09

Family

ID=38438279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07105135A Withdrawn EP1843013A3 (en) 2006-03-30 2007-03-28 Variable-actuation, electro-hydraulic system and device controlling the valves of internal combustion engines

Country Status (2)

Country Link
EP (1) EP1843013A3 (en)
IT (1) ITMI20060608A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013207863A1 (en) * 2013-04-30 2014-10-30 Mahle International Gmbh Device for controlling a gas exchange valve of an internal combustion engine
CN111636942B (en) * 2020-04-29 2022-01-04 潍坊职业学院 Hydraulic drive variable valve timing mechanism

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727595A (en) * 1969-08-30 1973-04-17 Bosch Gmbh Robert Control device for hydraulically operated tappet valves of internal combustion engines
CH536934A (en) * 1969-08-30 1973-05-15 Bosch Gmbh Robert Control of inlet and outlet valves in internal combustion engines by liquid
EP0139566A1 (en) * 1983-09-23 1985-05-02 Societe Alsacienne De Constructions Mecaniques De Mulhouse Electro-hydraulic unit for the control of the valves of an internal-combustion engine
WO1992007174A1 (en) * 1990-10-16 1992-04-30 Lotus Cars Ltd. Valve control apparatus
US5456222A (en) * 1995-01-06 1995-10-10 Ford Motor Company Spool valve control of an electrohydraulic camless valvetrain
EP0736671A2 (en) * 1995-04-05 1996-10-09 Ford Motor Company Limited Balancing valve motion in an electrohydraulic camless valvetrain
US5797360A (en) * 1996-06-14 1998-08-25 Fev Motorentechnik Gmbh & Co Kg Method for controlling cylinder valve drives in a piston-type internal combustion engine
US6067946A (en) * 1996-12-16 2000-05-30 Cummins Engine Company, Inc. Dual-pressure hydraulic valve-actuation system
DE10113722A1 (en) * 2001-03-21 2002-09-26 Mahle Ventiltrieb Gmbh Hydraulic actuator drive for internal combustion engine inlet and exhaust valves has pump that feeds discontinuously with exclusively direct hydraulic connection to valve to be operated
US20030111044A1 (en) * 2001-12-17 2003-06-19 Cotton Clifford E. Method and apparatus for operating an internal combustion engine exhaust valve for braking
DE102004040210A1 (en) * 2004-08-19 2006-03-02 Robert Bosch Gmbh Hydraulic controller for gas shuttle valve in internal combustion engine has hydraulic subsystem having differential pressure sensor connected to control unit by signal line
EP1770247A2 (en) * 2005-09-28 2007-04-04 Dell'orto S.P.A. Electro-hydraulic variable valve actuator and method to control valves of internal combustion engines

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727595A (en) * 1969-08-30 1973-04-17 Bosch Gmbh Robert Control device for hydraulically operated tappet valves of internal combustion engines
CH536934A (en) * 1969-08-30 1973-05-15 Bosch Gmbh Robert Control of inlet and outlet valves in internal combustion engines by liquid
EP0139566A1 (en) * 1983-09-23 1985-05-02 Societe Alsacienne De Constructions Mecaniques De Mulhouse Electro-hydraulic unit for the control of the valves of an internal-combustion engine
WO1992007174A1 (en) * 1990-10-16 1992-04-30 Lotus Cars Ltd. Valve control apparatus
US5456222A (en) * 1995-01-06 1995-10-10 Ford Motor Company Spool valve control of an electrohydraulic camless valvetrain
EP0736671A2 (en) * 1995-04-05 1996-10-09 Ford Motor Company Limited Balancing valve motion in an electrohydraulic camless valvetrain
US5797360A (en) * 1996-06-14 1998-08-25 Fev Motorentechnik Gmbh & Co Kg Method for controlling cylinder valve drives in a piston-type internal combustion engine
US6067946A (en) * 1996-12-16 2000-05-30 Cummins Engine Company, Inc. Dual-pressure hydraulic valve-actuation system
DE10113722A1 (en) * 2001-03-21 2002-09-26 Mahle Ventiltrieb Gmbh Hydraulic actuator drive for internal combustion engine inlet and exhaust valves has pump that feeds discontinuously with exclusively direct hydraulic connection to valve to be operated
US20030111044A1 (en) * 2001-12-17 2003-06-19 Cotton Clifford E. Method and apparatus for operating an internal combustion engine exhaust valve for braking
DE102004040210A1 (en) * 2004-08-19 2006-03-02 Robert Bosch Gmbh Hydraulic controller for gas shuttle valve in internal combustion engine has hydraulic subsystem having differential pressure sensor connected to control unit by signal line
EP1770247A2 (en) * 2005-09-28 2007-04-04 Dell'orto S.P.A. Electro-hydraulic variable valve actuator and method to control valves of internal combustion engines

Also Published As

Publication number Publication date
EP1843013A2 (en) 2007-10-10
ITMI20060608A1 (en) 2007-09-30

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