SE8005910L - METHOD AND DEVICE FOR IMPROVEMENT OF ENGINE ENGINE - Google Patents

METHOD AND DEVICE FOR IMPROVEMENT OF ENGINE ENGINE

Info

Publication number
SE8005910L
SE8005910L SE8005910A SE8005910A SE8005910L SE 8005910 L SE8005910 L SE 8005910L SE 8005910 A SE8005910 A SE 8005910A SE 8005910 A SE8005910 A SE 8005910A SE 8005910 L SE8005910 L SE 8005910L
Authority
SE
Sweden
Prior art keywords
engine
intake valve
moment
internal
bottom dead
Prior art date
Application number
SE8005910A
Other languages
Swedish (sv)
Inventor
R Curtil
Original Assignee
Semt
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 Semt filed Critical Semt
Publication of SE8005910L publication Critical patent/SE8005910L/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F02B41/02—Engines with prolonged expansion
    • F02B41/04—Engines with prolonged expansion in main cylinders
    • 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
    • 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
    • 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
    • F02D13/06—Cutting-out cylinders
    • 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
    • F01L1/08—Shape of cams
    • 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
    • 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
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)

Abstract

The invention relates to a device and a process for the selective variation of the compression ratio of an internal-combustion engine according to the engine load. The device comprises, in the cinematic control chain 34 of each intake valve (2), a means (10) causing the intake valve to close before the normal closing moment after bottom dead centre and governed by the current load of the engine so as to function only under low loads; and a means (11) considerably extending the opening period of each intake valve beyond the normal closing moment after bottom dead centre by preventing it from closing completely at this moment and taking action only under high loads. This device makes it possible to improve the performance of internal-combustion engines. <IMAGE>
SE8005910A 1979-08-30 1980-08-22 METHOD AND DEVICE FOR IMPROVEMENT OF ENGINE ENGINE SE8005910L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7921796A FR2464372A1 (en) 1979-08-30 1979-08-30 METHOD AND DEVICE FOR IMPROVING THE EFFICIENCY OF AN INTERNAL COMBUSTION ENGINE BY SELECTIVE VARIATION AT THE ACTUAL COMPRESSION RATE ACCORDING TO THE MOTOR RPM

Publications (1)

Publication Number Publication Date
SE8005910L true SE8005910L (en) 1981-03-01

Family

ID=9229221

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8005910A SE8005910L (en) 1979-08-30 1980-08-22 METHOD AND DEVICE FOR IMPROVEMENT OF ENGINE ENGINE

Country Status (13)

Country Link
EP (1) EP0024994A1 (en)
JP (1) JPS5650231A (en)
AU (1) AU6191880A (en)
BR (1) BR8005437A (en)
DD (1) DD152832A5 (en)
DK (1) DK370080A (en)
ES (1) ES8200742A1 (en)
FI (1) FI802683A (en)
FR (1) FR2464372A1 (en)
NO (1) NO802537L (en)
PL (1) PL226506A1 (en)
SE (1) SE8005910L (en)
YU (1) YU217280A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095114A (en) * 1983-10-31 1985-05-28 Fujio Inoue Valve switching mechanism of motor
JPS61187526A (en) * 1985-02-15 1986-08-21 Toyota Motor Corp Valve-timing controller for internal-combustion engine equipment with supercharger
WO1989000643A1 (en) * 1987-07-18 1989-01-26 Graham Beverley Internal combustion engine
DE19581354T1 (en) * 1994-11-09 1997-10-16 John Brengle Taylor Engine improvements
DE50200316D1 (en) * 2001-02-21 2004-05-06 Ge Jenbacher Gmbh & Co Ohg Jen Valve train for an internal combustion engine
DE102009041426A1 (en) 2009-09-16 2011-05-19 Thyssenkrupp Presta Teccenter Ag Camshaft with variable valve opening duration
US10428746B2 (en) * 2014-12-08 2019-10-01 Wärtsilä Finland Oy Method of controlling an operation of an inlet valve system and an inlet valve control system
DE102015224759A1 (en) * 2015-12-10 2017-06-14 Bayerische Motoren Werke Aktiengesellschaft internal combustion engine
WO2024079642A1 (en) * 2022-10-12 2024-04-18 Cummins Inc. Valve actuation system comprising a discrete lost motion device
US20240125254A1 (en) * 2022-10-12 2024-04-18 Jacobs Vehicle Systems, Inc. Discrete lost motion device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1294510A (en) * 1961-07-07 1962-05-26 Briggs & Stratton Corp Method of operating a four-stroke internal combustion engine and engine operating according to this method
JPS5179840A (en) * 1975-01-07 1976-07-12 Honda Motor Co Ltd
FR2341045A1 (en) * 1976-02-13 1977-09-09 Bertin & Cie Neutralisation of individual cylinders of IC engine - using butterfly valves or cam shaft in eccentric housing to close inlet and outlet valves
US4114643A (en) * 1976-07-02 1978-09-19 Nissan Motor Company, Limited Valve operating mechanism of internal combustion engine
US4134371A (en) * 1977-04-28 1979-01-16 Hausknecht Louis A Valve control system

Also Published As

Publication number Publication date
FR2464372A1 (en) 1981-03-06
JPS5650231A (en) 1981-05-07
ES494651A0 (en) 1981-11-16
PL226506A1 (en) 1981-05-22
NO802537L (en) 1981-03-02
DK370080A (en) 1981-03-01
AU6191880A (en) 1981-03-05
ES8200742A1 (en) 1981-11-16
YU217280A (en) 1983-10-31
FI802683A (en) 1981-03-01
BR8005437A (en) 1981-03-31
DD152832A5 (en) 1981-12-09
EP0024994A1 (en) 1981-03-11

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