IT202200002711A1 - Sistema per la variazione della fase di apertura e/o chiusura di valvole di aspirazione - Google Patents

Sistema per la variazione della fase di apertura e/o chiusura di valvole di aspirazione Download PDF

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Publication number
IT202200002711A1
IT202200002711A1 IT102022000002711A IT202200002711A IT202200002711A1 IT 202200002711 A1 IT202200002711 A1 IT 202200002711A1 IT 102022000002711 A IT102022000002711 A IT 102022000002711A IT 202200002711 A IT202200002711 A IT 202200002711A IT 202200002711 A1 IT202200002711 A1 IT 202200002711A1
Authority
IT
Italy
Prior art keywords
variation
opening
intake valves
closing phase
closing
Prior art date
Application number
IT102022000002711A
Other languages
English (en)
Inventor
Walter Mariotti
Original Assignee
Piaggio & C 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 Piaggio & C Spa filed Critical Piaggio & C Spa
Priority to IT102022000002711A priority Critical patent/IT202200002711A1/it
Priority to PCT/IB2023/051320 priority patent/WO2023156899A1/en
Priority to CN202380025910.2A priority patent/CN118829779A/zh
Publication of IT202200002711A1 publication Critical patent/IT202200002711A1/it

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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • 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
    • F01L13/0021—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 by modification of rocker arm ratio
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L1/18—Rocking arms or levers
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • 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
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/101—Electromagnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
IT102022000002711A 2022-02-15 2022-02-15 Sistema per la variazione della fase di apertura e/o chiusura di valvole di aspirazione IT202200002711A1 (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IT102022000002711A IT202200002711A1 (it) 2022-02-15 2022-02-15 Sistema per la variazione della fase di apertura e/o chiusura di valvole di aspirazione
PCT/IB2023/051320 WO2023156899A1 (en) 2022-02-15 2023-02-14 A phase change system for opening and/or closing intake valves
CN202380025910.2A CN118829779A (zh) 2022-02-15 2023-02-14 用于打开和/或关闭进气门的相变系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102022000002711A IT202200002711A1 (it) 2022-02-15 2022-02-15 Sistema per la variazione della fase di apertura e/o chiusura di valvole di aspirazione

Publications (1)

Publication Number Publication Date
IT202200002711A1 true IT202200002711A1 (it) 2023-08-15

Family

ID=81580620

Family Applications (1)

Application Number Title Priority Date Filing Date
IT102022000002711A IT202200002711A1 (it) 2022-02-15 2022-02-15 Sistema per la variazione della fase di apertura e/o chiusura di valvole di aspirazione

Country Status (3)

Country Link
CN (1) CN118829779A (it)
IT (1) IT202200002711A1 (it)
WO (1) WO2023156899A1 (it)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735156A1 (de) * 1986-10-16 1988-05-26 Honda Motor Co Ltd Einrichtung zur ventilbetaetigung in einer brennkraftmaschine
DE10155825A1 (de) * 2001-11-14 2003-05-22 Ina Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
JP2012077741A (ja) 2010-09-07 2012-04-19 Honda Motor Co Ltd 内燃機関の可変動弁装置
EP2540996A2 (en) * 2011-06-27 2013-01-02 Kwang Yang Motor Co., Ltd. Structure of driving member for variable valve of engine
EP2881557A2 (en) * 2013-12-05 2015-06-10 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine and straddle-type vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735156A1 (de) * 1986-10-16 1988-05-26 Honda Motor Co Ltd Einrichtung zur ventilbetaetigung in einer brennkraftmaschine
DE10155825A1 (de) * 2001-11-14 2003-05-22 Ina Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
JP2012077741A (ja) 2010-09-07 2012-04-19 Honda Motor Co Ltd 内燃機関の可変動弁装置
EP2540996A2 (en) * 2011-06-27 2013-01-02 Kwang Yang Motor Co., Ltd. Structure of driving member for variable valve of engine
EP2540996B1 (en) 2011-06-27 2015-02-25 Kwang Yang Motor Co., Ltd. Structure of driving member for variable valve of engine
EP2881557A2 (en) * 2013-12-05 2015-06-10 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine and straddle-type vehicle

Also Published As

Publication number Publication date
CN118829779A (zh) 2024-10-22
WO2023156899A1 (en) 2023-08-24

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