WO2022224233A4 - Control of valves with locking system in internal combustion engines - Google Patents

Control of valves with locking system in internal combustion engines Download PDF

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Publication number
WO2022224233A4
WO2022224233A4 PCT/IB2022/057116 IB2022057116W WO2022224233A4 WO 2022224233 A4 WO2022224233 A4 WO 2022224233A4 IB 2022057116 W IB2022057116 W IB 2022057116W WO 2022224233 A4 WO2022224233 A4 WO 2022224233A4
Authority
WO
WIPO (PCT)
Prior art keywords
pair
valve
rotation axis
locking
pulleys
Prior art date
Application number
PCT/IB2022/057116
Other languages
French (fr)
Other versions
WO2022224233A2 (en
WO2022224233A3 (en
Inventor
Nefton PALI
Original Assignee
Shala S.R.L.S.
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 Shala S.R.L.S. filed Critical Shala S.R.L.S.
Publication of WO2022224233A2 publication Critical patent/WO2022224233A2/en
Publication of WO2022224233A3 publication Critical patent/WO2022224233A3/en
Publication of WO2022224233A4 publication Critical patent/WO2022224233A4/en

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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • 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
    • F01L1/30—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of positively opened and closed valves, i.e. desmodromic 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine
    • F01L2003/258—Valve configurations in relation to engine opening away from cylinder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The present invention relates to a maneuver apparatus (1) for intake and exhaust valves wherein the maneuvering means are adapted to move the valve (11) along the axial direction of the symmetry axis (A) of the stem (200 ) between a first working position, in which the valve (11) is arranged at the related valve seat (50), and a second working position, in which the valve (11) is spaced apart from the valve seat (50), and vice versa, wherein the valve (11) is arranged outside of the cylinder head and comprises at least a projection (311, 411, 511) protruding from the stem (200) and substantially perpendicular to the symmetry axis (A), wherein a locking device (100) provided with at least a locking element (114, 115, 116) is adapted to be operatively coupled with the projection (311, 411, 511), and wherein the maneuvering means are operatively coupled to the locking device (100) and are adapted to move the locking device (100) from a locking position, in which the locking element (114, 115, 116) is at least partially coupled to the projection (311, 411, 511) to prevent movement of the valve (11) along the axial direction, to an unlocking position, in which the locking element (114, 115, 116) is disengaged from the projection (311, 411, 511) to allow movement of the valve (11) along the axial direction, and vice versa.

Claims

AMENDED CLAIMS received by the International Bureau on 13.01.2023
Claims A maneuver apparatus (1) for intake and exhaust valves comprising at least an intake and/or exhaust valve (11) and maneuvering means of said valves, wherein each of said valves (11) comprise a head (111) and a stem (200), said stem (200) being operatively coupled to said maneuvering means, and wherein said maneuvering means are able to move said valve (11) between a first working position, in which said valve (11) is arranged at the related valve seat (50), and a second working position, in which said valve (11) is spaced apart from said valve seat (50), and vice-versa, along the axial direction of the symmetry axis (A) of said stem (200), wherein said valve (11) is arranged outside of the cylinder head and comprises at least a projection (311, 411, 511) which protrudes from said stem (200) and substantially perpendicular to said symmetry axis (A), wherein said maneuver apparatus (1) comprises a locking device (100) provided with at least a locking element (114, 115, 116) capable to be operatively coupled to said projection (311, 411, 511), and wherein said maneuvering means are operatively coupled to said locking device (100) and are able to move said locking device (100) from a locking position, in which said locking element (114, 115, 116) is at least partly engaged with said projection (311, 411, 511) avoiding the movement of said valve (11) along said axial direction, to an unlocking position, in which said locking element (114, 115, 116) is disengaged from said projection (311, 411, 511) allowing the movement of said valve (11) along said axial direction, and vice-versa, wherein said maneuvering means moves said valve (11) along said axial direction in a synchronized manner with said movement of said locking element (100) between said first working position, when said locking element (114, 115, 116) is in said locking position, and said second working position, when said locking element (114, 115, 116) is in said unlocking position, and vice-versa,
AMENDED SHEET (ARTICLE 19) said maneuver apparatus (1) is characterized in that said maneuvering means comprise a first pair of counter-rotating camshafts (201, 202), respectively provided with a first pair of cams (211, 221) and with a second pair of cams (212, 222), and a first actuating rod (210) operatively connected to said first pair of camshafts (201, 202), at a first portion, and to said stem (200), at a second portion opposite to said first portion, wherein said first actuating rod (210) is provided with a first pair of pulleys (231, 241) and with a second pair of pulleys (232, 242) arranged at said first portion, each of said first pair of pulleys (231, 241) and second pair of pulleys (232, 242) being aligned and concentric respectively to a first pulley rotation axis and to a second pulley rotation axis on opposite sides of said first actuating rod (210), and each of said first pair of pulleys (231, 241) and second pair of pulleys (232, 242) being operatively coupled to one of said first pair of camshafts (201, 202), wherein said first actuating rod (210) is constrained with respect to a first rod rotation axis interposed between said first pulley rotation axis and said second pulley rotation axis, and wherein the distance (DI) between said first pulley rotation axis and said second pulley rotation axis is lower than the sum of the major radii (D2, D3) of said first pairs of cams (211, 221) and second pair of cams (212, 222). Maneuver apparatus (1) for intake and exhaust valves according to claim 1, wherein said maneuver apparatus (1) comprises a centering element (500) provided with an opening operatively coupled with at least a sliding portion (211’) of said stem (200) and able to allow the movement of said valve (11) between said first working position and said second working position along the axial direction of the symmetry axis of said stem (200), and wherein said opening and said sliding portion (211’) have a have a section perpendicular to said symmetry axis with a conformation different from the cylindrical one to prevent rotation of said sliding portion (211’).
AMENDED SHEET (ARTICLE 19) Maneuver apparatus (1) for intake and exhaust valves according to one of claims 1-2, wherein said stem (200) comprises a plurality of projections (311, 411, 511) equidistant arranged radially with respect to said symmetry axis (A), wherein said locking device (100) comprises a locking disc (110) arranged concentric with respect to said stem (200) and provided with a plurality of unlocking openings (111, 112, 113) equidistant arranged radially with respect to said symmetry axis (A) and with a plurality of said locking elements (114, 115, 116) each respectively interposed between two successive unlocking openings (111, 112, 113), and wherein said maneuvering means are able to rotate said locking disc (110) with respect to said stem (200) from said locking position, wherein said locking elements (114, 115, 116) are arranged at said projections (311, 411, 511) to avoid the movement of said valve (11) along said axial direction, to said unlocking position, wherein said unlocking openings (111, 112, 113) are arranged at said projections (311, 411, 511) to allow the movement of said valve (11) along said axial direction, and vice-versa. Maneuver apparatus (1) for intake and exhaust valves according to claim 3, wherein said projections (311, 411, 511) have a first sloping surface (1311) between two opposite ends, wherein said locking elements (114, 115, 116) have a second sloping surface (1114) between two opposite ends, and wherein said first sloping surface (1311) and said second sloping surface (1114) are arranged facing to each other and have shape such as to fit together. Maneuver apparatus (1) for intake and exhaust valves according to claim 3 or 4, wherein said maneuvering means comprise a second pair of counter-rotating camshafts (401, 402), respectively provided with a third pair of cams and with a fourth pair of cams, and a second actuating rod (410) operatively connected to said second pair of camshafts (401, 402), at a first portion, and to said locking disc (110), at a second portion opposite to said
AMENDED SHEET (ARTICLE 19) first portion, wherein said second actuating rod (410) is provided with a third pair of pulleys and of a fourth pair of pulleys arranged at said first portion, each of said third pair of pulleys and fourth pair of pulleys being aligned and concentric respectively to a third pulley rotation axis and to a fourth pulley rotation axis on opposite sides of said second actuating rod, and each of said third pair of pulleys and of said fourth pair of pulleys being operatively coupled with one of said second pair of camshafts (401, 402), wherein said second actuating rod (410) is constrained with respect to a second rod rotation axis interposed between said third pulley rotation axis and said fourth pulley rotation axis, and wherein the distance between said third pulley rotation axis and said fourth pulley rotation axis is lower than the sum of the major radii of said third pairs of cams and fourth pair of cams. Maneuver apparatus (1) for intake and exhaust valves according to claims 1 and 5, wherein said first pair of camshafts (201, 202) and said second pair of camshafts (401, 402) have the same modulus of rotation speed. A vehicle comprising an internal combustion engine comprising a maneuver apparatus (1) for intake and exhaust valves according to one of claims 1-6. An electric generator comprising an internal combustion engine comprising a maneuver apparatus (1) for intake and exhaust valves according to one of claims 1-6.
AMENDED SHEET (ARTICLE 19)
PCT/IB2022/057116 2021-09-01 2022-08-01 Control of valves with locking system in internal combustion engines WO2022224233A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102021000022667 2021-09-01
IT102021000022667A IT202100022667A1 (en) 2021-09-01 2021-09-01 CONTROL OF VALVES WITH BLOCK SYSTEM IN INTERNAL COMBUSTION ENGINES

Publications (3)

Publication Number Publication Date
WO2022224233A2 WO2022224233A2 (en) 2022-10-27
WO2022224233A3 WO2022224233A3 (en) 2022-12-22
WO2022224233A4 true WO2022224233A4 (en) 2023-03-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2022/057116 WO2022224233A2 (en) 2021-09-01 2022-08-01 Control of valves with locking system in internal combustion engines

Country Status (2)

Country Link
IT (1) IT202100022667A1 (en)
WO (1) WO2022224233A2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926809A1 (en) * 1989-08-14 1991-02-21 Kriegler Franz Damping arrangement for valves in IC engine - makes use of conical bodies to avoid need for anti-knock agents
DE3926804A1 (en) * 1989-08-14 1991-02-21 Kriegler Franz Valve drive for IC engine - makes use of spring-loaded buffer and positive connection drive
KR101160216B1 (en) * 2007-08-07 2012-06-26 스쿠데리 그룹 엘엘씨 Knock resistant split-cycle engine and method
GB2519334A (en) * 2013-10-17 2015-04-22 Barrus E P Ltd A marine propulsion unit and a valve for a marine propulsion unit

Also Published As

Publication number Publication date
IT202100022667A1 (en) 2023-03-01
WO2022224233A2 (en) 2022-10-27
WO2022224233A3 (en) 2022-12-22

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