EP2340362B1 - Control arrangement for a valve operating assembly and a method for controlling the closing movement of a valve operating assembly - Google Patents

Control arrangement for a valve operating assembly and a method for controlling the closing movement of a valve operating assembly Download PDF

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Publication number
EP2340362B1
EP2340362B1 EP09744424A EP09744424A EP2340362B1 EP 2340362 B1 EP2340362 B1 EP 2340362B1 EP 09744424 A EP09744424 A EP 09744424A EP 09744424 A EP09744424 A EP 09744424A EP 2340362 B1 EP2340362 B1 EP 2340362B1
Authority
EP
European Patent Office
Prior art keywords
chamber
piston
guide member
duct
control
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
EP09744424A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2340362A1 (en
Inventor
Magnus Sundsten
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
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
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Application filed by Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP2340362A1 publication Critical patent/EP2340362A1/en
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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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • F01L1/245—Hydraulic tappets
    • F01L1/255—Hydraulic tappets between cam and rocker arm
    • 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
    • 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
    • F01L1/14—Tappets; Push rods
    • F01L1/16—Silencing impact; Reducing wear
    • 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
    • F01L2013/0089—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 with means for delaying valve closing

Definitions

  • the invention relates to a control arrangement for a valve operating assembly in a piston engine according to preamble of claim 1 as well as to a method for controlling the closing movement of a valve operating assembly in a piston engine according to preamble of claim 6.
  • valve tappet member When a delay function is in use at the closing phase of the inlet valve the valve tappet member is for a while not directly in mechanical force transmission connection with the cam shaft. At a later phase this connection is however reestablished, but this must occur slowly enough to ensure smooth operation and prevent breaking of the parts in question. Therefore an efficient and reliable control arrangement is needed for the operation of the valve operating assembly and specifically for providing efficient braking of the movement of the valve tappet and other valve moving members included in the valve operating assembly.
  • An object of the invention is to provide a control arrangement for a valve operating assembly and a method for controlling the closing movement of a valve operating assembly, which solve the above mentioned problems of the prior art.
  • a specific object of the invention is further to provide an efficient, straightforward and reliable braking method and arrangement to be adapted for the closing phase of a valve operating assembly in connection with the delay function of the inlet valve.
  • the guide member includes a third chamber, which is arranged to be in communication with the first duct for releasing of pressure in the first chamber, and a control piston located in said third chamber and movably arranged with regard to the guide member for controlling pressure medium flow through said third chamber.
  • the guide member is provided with a second duct for communication between the first duct and the third chamber and a third duct for releasing of pressure in said third chamber.
  • the control piston is then arranged to control the opening and closing of said third duct.
  • Efficient operation of the arrangement can be achieved if the diameter of the third duct is smaller that the diameter of the second duct.
  • the control piston is arranged to partly extend out from the guide member after releasing of pressure in the first chamber for engaging with the piston device and braking its movement toward the guide member.
  • the outward extending movement of the control piston is with advantage accomplished by means of the hydraulic medium entering from the first chamber into the third chamber.
  • the braking function takes place in the upper part as well as in the lower part of the piston device included in the control arrangement of the valve operating assembly making the operation efficient and smooth.
  • the braking function is available always when also the delay function for delaying the closing of the inlet valve is in use, and it is practically independent on the operating speed on the engine. Since the operation of the control piston can be accomplished by making use of the hydraulic medium normally utilised for the inlet valve delay function, an uncomplicated construction and reliable operation can be achieved.
  • the invention is further defined by a method for controlling the closing movement of a valve operating assembly in accordance with claims 6 and 7.
  • FIG. 1 shows a schematic view of a piston engine 1 as far as it is relevant to the understanding of the invention.
  • the gas exchange of the cylinders (not shown) in the piston engine 1 is carried out under the control of gas exchange valves, i.e. inlet valves and exhaust valves, located on a cylinder head 2. Only inlet valves 3 are shown and they are operated by means of valve mechanisms 6 which are typically guided by the cam profiles of cam devices 5 arranged on a camshaft 4 of the engine.
  • the force transmission connection between each valve mechanism 6 and the corresponding cam device 5 is realised by a control arrangement 7.
  • the control arrangement 7 is shown in more detail in Figures 2 - 6 .
  • the control arrangement 7 comprises a body part 8, which is typically attached to the engine body.
  • a piston device 9 is movably arranged within the body part 8.
  • the upper end of the piston device 9 is arranged in force transmission connection with the valve mechanism 6 (not shown closer). This connection may be mechanical or hydraulic.
  • the movements of the piston device 9 are controlled by a guide member 10 arranged at the lower end of the piston device within the body part 8.
  • the guide member 10 is in engagement with and urged by a spring 11 towards a roller 12, which receives its guidance from the cam profile of the cam device 5.
  • the body part 8 and the piston device 9 together define a first chamber 13, into which hydraulic medium can be selectively fed for providing a delay in the closing of the inlet valve 3.
  • the feed line is provided with a shut-off valve 14 and a non-retum valve 15.
  • the shut-off valve 14 By means of the shut-off valve 14 the feed line to the first chamber 13 may be connected or disconnected, depending on whether or not the aim is to use the delay function for the delayed closing of the inlet valve 3.
  • Due to the non-retum valve 15 the control arrangement cannot cause any pulsations in the source of hydraulic medium. This is of importance when lubricating oil is used as a hydraulic medium.
  • the body part 8 is additionally provided with a duct 16 for releasing of pressure in the first chamber 13 and with a second chamber 17, which encloses the guide member 10, the spring 11 as well as the lower end of the piston device 9.
  • the guide member 10 includes a groove 10a in its mantle surface and is additionally provided with a third chamber 18.
  • a duct 19 connects the groove 10a to the third chamber 18.
  • a control piston 20 is movably arranged in the third chamber 18 and said chamber is further connected with ducts 21 and 22 to an oil sump providing lubrication for the camshaft and the parts connected therewith.
  • figure 7 illustrates the operation of the arrangement according to the invention under normal load situations of the engine.
  • the situation of figure 7 corresponds to the one disclosed in figure 4 , but in this case the feed line 14 and 15 is closed.
  • no hydraulic medium is fed into the chamber 13.
  • the guide member 10 and the piston device 9 remain in direct contact through the whole operation cycle and the control piston is inoperative, since the chambers and ducts are mainly filled with air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP09744424A 2008-10-29 2009-10-09 Control arrangement for a valve operating assembly and a method for controlling the closing movement of a valve operating assembly Active EP2340362B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20086021A FI121245B (fi) 2008-10-29 2008-10-29 Ohjausjärjestely venttiilien käyttökoneistolle ja menetelmä venttiilien käyttökoneiston sulkemisliikkeen ohjaamiseksi
PCT/FI2009/050804 WO2010049583A1 (en) 2008-10-29 2009-10-09 Control arrangement for a valve operating assembly and a method for controlling the closing movement of a valve operating assembly

Publications (2)

Publication Number Publication Date
EP2340362A1 EP2340362A1 (en) 2011-07-06
EP2340362B1 true EP2340362B1 (en) 2012-09-05

Family

ID=39924659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09744424A Active EP2340362B1 (en) 2008-10-29 2009-10-09 Control arrangement for a valve operating assembly and a method for controlling the closing movement of a valve operating assembly

Country Status (4)

Country Link
EP (1) EP2340362B1 (fi)
CN (1) CN102197200B (fi)
FI (1) FI121245B (fi)
WO (1) WO2010049583A1 (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109196191A (zh) * 2016-04-05 2019-01-11 Avl里斯脱有限公司 往复活塞式机器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI123065B (fi) * 2011-05-17 2012-10-31 Waertsilae Finland Oy Monisylinterinen mäntämoottori
KR101371827B1 (ko) * 2012-10-19 2014-03-07 현대중공업 주식회사 가변 밸브 타이밍장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1191992B (de) * 1961-10-11 1965-04-29 Kloeckner Humboldt Deutz Ag Ventilgesteuerte Hubkolbenbrennkraftmaschine mit hydraulisch betaetigtem Stellglied zur Veraenderung des Ventilhubes
FR2484531A1 (fr) * 1980-06-11 1981-12-18 Renault Poussoir hydraulique de soupape, a fuite hydraulique et amortisseur de retombee de la soupape
GB8614310D0 (en) * 1986-06-12 1986-07-16 South Western Ind Res Variable actuator
US5002022A (en) * 1989-08-30 1991-03-26 Cummins Engine Company, Inc. Valve control system with a variable timing hydraulic link
DE4111610C2 (de) * 1990-07-27 1998-07-30 Audi Ag Vorrichtung zur Veränderung der Steuerzeiten eines Gaswechselventils
EP1232336A4 (en) * 1999-09-17 2009-08-05 Diesel Engine Retarders Inc MEMORY WITH INCLUDED VOLUME FOR A TOTGANGSYSTEM
US6883477B2 (en) * 2002-10-07 2005-04-26 Ricardo, Inc. Apparatus for deactivating an engine valve
CN1287069C (zh) * 2003-11-27 2006-11-29 宁波华液机器制造有限公司 一种压差式变气门控制系统
FI124107B (fi) * 2006-06-30 2014-03-14 Wärtsilä Finland Oy Mäntämoottorin kaasunvaihtoventtiilin ohjausjärjestely ja menetelmä mäntämoottorin kaasunvaihtoventtiilin ohjaamiseksi

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109196191A (zh) * 2016-04-05 2019-01-11 Avl里斯脱有限公司 往复活塞式机器
US11466596B2 (en) 2016-04-05 2022-10-11 Avl List Gmbh Reciprocating-piston machine

Also Published As

Publication number Publication date
FI20086021A0 (fi) 2008-10-29
WO2010049583A1 (en) 2010-05-06
CN102197200B (zh) 2013-06-05
EP2340362A1 (en) 2011-07-06
FI20086021A (fi) 2010-04-30
FI121245B (fi) 2010-08-31
CN102197200A (zh) 2011-09-21

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