EP4735741A1 - Brennkraftmaschine mit variabler einlassventilbetätigung, stiefelprofilnocken und motorsteuerungsverfahren - Google Patents

Brennkraftmaschine mit variabler einlassventilbetätigung, stiefelprofilnocken und motorsteuerungsverfahren

Info

Publication number
EP4735741A1
EP4735741A1 EP24734133.2A EP24734133A EP4735741A1 EP 4735741 A1 EP4735741 A1 EP 4735741A1 EP 24734133 A EP24734133 A EP 24734133A EP 4735741 A1 EP4735741 A1 EP 4735741A1
Authority
EP
European Patent Office
Prior art keywords
bdc
cylinder
intake valve
engine
intake
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.)
Pending
Application number
EP24734133.2A
Other languages
English (en)
French (fr)
Inventor
Raffaele Ricco
Marcello Gargano
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.)
Centro Ricerche Fiat SCpA
Original Assignee
Centro Ricerche Fiat SCpA
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 Centro Ricerche Fiat SCpA filed Critical Centro Ricerche Fiat SCpA
Publication of EP4735741A1 publication Critical patent/EP4735741A1/de
Pending 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
    • 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
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0223—Variable control of the intake valves only
    • F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0257—Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0269—Controlling the valves to perform a Miller-Atkinson cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0273—Multiple actuations of a valve within an engine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • 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
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L13/0031—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 tappet or pushrod length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
EP24734133.2A 2023-06-27 2024-06-06 Brennkraftmaschine mit variabler einlassventilbetätigung, stiefelprofilnocken und motorsteuerungsverfahren Pending EP4735741A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000013263A IT202300013263A1 (it) 2023-06-27 2023-06-27 "Motore a combustione interna con azionamento variabile delle valvole di aspirazione, con camme a profilo boot, e procedimento di controllo del motore"
PCT/IB2024/055530 WO2025003805A1 (en) 2023-06-27 2024-06-06 Internal combustion engine with variable intake valve actuation, boot profile cams, and engine control method

Publications (1)

Publication Number Publication Date
EP4735741A1 true EP4735741A1 (de) 2026-05-06

Family

ID=87974364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24734133.2A Pending EP4735741A1 (de) 2023-06-27 2024-06-06 Brennkraftmaschine mit variabler einlassventilbetätigung, stiefelprofilnocken und motorsteuerungsverfahren

Country Status (3)

Country Link
EP (1) EP4735741A1 (de)
IT (1) IT202300013263A1 (de)
WO (1) WO2025003805A1 (de)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1285853B1 (it) 1996-04-24 1998-06-24 Fiat Ricerche Motore a combustione interna con valvole ad azionamento variabile.
ITTO20010660A1 (it) 2001-07-06 2003-01-06 Fiat Ricerche Motore diesel pluricilindrico con azionamento variabile delle valvole.
DE602004004997T2 (de) 2004-01-16 2007-11-08 C.R.F. S.C.P.A. Brennkraftmaschine mit einer einzigen obenliegenden Nockenwelle zur mechanischen Steuerung der Auslassventile und zur elektrohydraulischen Steuerung der Einlassventile
PL1674673T3 (pl) 2004-12-23 2007-08-31 Fiat Ricerche Silnik spalinowy z hydraulicznie zmiennymi zaworami
ATE377140T1 (de) 2005-05-24 2007-11-15 Fiat Ricerche Vorrichtung und verfahren zur kontrolle der last und der verbrennung in einer brennkraftmaschine durch eine ventilbetätigung mit mehrfachem ventilhub pro zyklus
EP2184452B1 (de) * 2008-11-07 2011-02-23 C.R.F. Società Consortile per Azioni Dieselmotor mit variabler Einlassventilbetätigung und einer internen Abgasrückführung
EP2261471B1 (de) 2009-05-25 2014-09-17 C.R.F. Società Consortile per Azioni Brennkraftmaschine mit zwei hydraulische Einlassventile mit unterschiedlichen Ventilschliessfedern für jede Zylinder
US8800530B2 (en) * 2010-12-22 2014-08-12 Caterpillar Inc. Stratified charge port injection engine and method
EP2693009B1 (de) 2012-07-31 2014-12-10 C.R.F. Società Consortile per Azioni Verbrennungsmotor mit einem System zur variablen Betätigung der Einlassventile mit Dreiwege-Magnetventilen und Verfahren zur Steuerung des Motors
EP3032054B1 (de) * 2014-12-10 2017-03-29 C.R.F. Società Consortile per Azioni Brennkraftmaschine mit elektronisch gesteuertem hydrauliksystem zur variablen betätigung von einlassventilen, mit einer vorrichtung zum auffüllen des systems mit fluid
US20210262367A1 (en) * 2018-06-28 2021-08-26 Weichai Power Co., Ltd. Intake Valve Device Capable of Implementing Two-Stage Switching of Gas Distribution Phase and Diesel Engine
WO2021087421A1 (en) 2019-11-02 2021-05-06 Fibulas, Inc. Working principles and devices for an integrated biological experimentation and research system
EP3832078B1 (de) 2019-12-02 2022-07-27 C.R.F. Società Consortile per Azioni System und verfahren zur variablen betätigung der ventile eines verbrennungsmotors
IT202200025410A1 (it) 2022-12-13 2024-06-13 Fiat Ricerche "Motore a combustione interna con azionamento variabile delle valvole di aspirazione e procedimento di controllo del motore"
IT202300003450A1 (it) 2023-02-27 2024-08-27 Fiat Ricerche "motore a combustione interna con azionamento variabile delle valvole di aspirazione e procedimento di controllo del motore"

Also Published As

Publication number Publication date
WO2025003805A1 (en) 2025-01-02
IT202300013263A1 (it) 2024-12-27

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