IT1257540B - VALVE CONTROL SYSTEM FOR A VARIABLE ENDOTHERMAL ENGINE, IN PARTICULAR AN ENGINE WITH MORE VALVES PER CYLINDER. - Google Patents

VALVE CONTROL SYSTEM FOR A VARIABLE ENDOTHERMAL ENGINE, IN PARTICULAR AN ENGINE WITH MORE VALVES PER CYLINDER.

Info

Publication number
IT1257540B
IT1257540B ITTO920440A ITTO920440A IT1257540B IT 1257540 B IT1257540 B IT 1257540B IT TO920440 A ITTO920440 A IT TO920440A IT TO920440 A ITTO920440 A IT TO920440A IT 1257540 B IT1257540 B IT 1257540B
Authority
IT
Italy
Prior art keywords
engine
variable
valves
control system
cam
Prior art date
Application number
ITTO920440A
Other languages
Italian (it)
Inventor
Paolo Martinelli
Original Assignee
Ferrari 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 Ferrari Spa filed Critical Ferrari Spa
Priority to ITTO920440A priority Critical patent/IT1257540B/en
Publication of ITTO920440A0 publication Critical patent/ITTO920440A0/en
Priority to DE69308373T priority patent/DE69308373T2/en
Priority to ES93108213T priority patent/ES2097942T3/en
Priority to EP93108213A priority patent/EP0570963B1/en
Publication of ITTO920440A1 publication Critical patent/ITTO920440A1/en
Application granted granted Critical
Publication of IT1257540B publication Critical patent/IT1257540B/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
    • 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
    • F01L13/0042—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 with cams being profiled in axial and radial direction
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Landscapes

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

Abstract

Sistema di comando (1) di valvole (2) per un motore endotermico a fasatura variabile, in particolare per un motore con più valvole (2) per cilindro (6), del tipo in cui un albero a camme (3) porta almeno una camma (4), con profilo variabile lungo l'asse dell'albero stesso, ed un elemento di comando (5) è interposto tra la camma (4) ed almeno una valvola (2) di servizio di un cilindro (6); l'elemento di comando (5) è costituito da un pattino oscillante (14), cooperante con una superficie laterale (15) della camma (4),e da un bilancere (18), sostanzialmente conformato a T, costituito da una porzione centrale (21) provvista superiormente di una sella di supporto (16) per il pattino oscillante (14) e, inferiormente, di una sede di vincolamento (22) ad un rispettivo fulcro (25) per il bilancere (18), portato da una testata (11) del motore, e da una coppia di bracci laterali (31) che cooperano in appoggio contro gli steli (34) di rispettive valvole (2) omologhe del detto cilindro (6).(Figure 1 e 2).Control system (1) of valves (2) for an internal combustion engine with variable timing, in particular for an engine with several valves (2) per cylinder (6), of the type in which a camshaft (3) carries at least one cam (4), with variable profile along the axis of the shaft itself, and a control element (5) is interposed between the cam (4) and at least one service valve (2) of a cylinder (6); the control element (5) consists of an oscillating slide (14), cooperating with a lateral surface (15) of the cam (4), and of a rocker arm (18), substantially T-shaped, consisting of a central portion (21) provided at the top with a support saddle (16) for the oscillating sliding block (14) and, at the bottom, with a seat for binding (22) to a respective fulcrum (25) for the rocker arm (18), carried by a head (11) of the engine, and by a pair of lateral arms (31) which cooperate in support against the rods (34) of respective homologous valves (2) of said cylinder (6). (Figures 1 and 2).

ITTO920440A 1992-05-22 1992-05-22 VALVE CONTROL SYSTEM FOR A VARIABLE ENDOTHERMAL ENGINE, IN PARTICULAR AN ENGINE WITH MORE VALVES PER CYLINDER. IT1257540B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ITTO920440A IT1257540B (en) 1992-05-22 1992-05-22 VALVE CONTROL SYSTEM FOR A VARIABLE ENDOTHERMAL ENGINE, IN PARTICULAR AN ENGINE WITH MORE VALVES PER CYLINDER.
DE69308373T DE69308373T2 (en) 1992-05-22 1993-05-19 Variable valve control device for an internal combustion engine, in particular an internal combustion engine with several valves per cylinder
ES93108213T ES2097942T3 (en) 1992-05-22 1993-05-19 VALVE CONTROL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WITH VARIABLE ADJUSTMENT, PARTICULARLY FOR AN ENGINE WITH SEVERAL VALVES PER CYLINDER.
EP93108213A EP0570963B1 (en) 1992-05-22 1993-05-19 A valve control system for a variable-timing internal combustion engine, particularly for an engine with several valves per cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO920440A IT1257540B (en) 1992-05-22 1992-05-22 VALVE CONTROL SYSTEM FOR A VARIABLE ENDOTHERMAL ENGINE, IN PARTICULAR AN ENGINE WITH MORE VALVES PER CYLINDER.

Publications (3)

Publication Number Publication Date
ITTO920440A0 ITTO920440A0 (en) 1992-05-22
ITTO920440A1 ITTO920440A1 (en) 1993-11-22
IT1257540B true IT1257540B (en) 1996-01-30

Family

ID=11410481

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO920440A IT1257540B (en) 1992-05-22 1992-05-22 VALVE CONTROL SYSTEM FOR A VARIABLE ENDOTHERMAL ENGINE, IN PARTICULAR AN ENGINE WITH MORE VALVES PER CYLINDER.

Country Status (4)

Country Link
EP (1) EP0570963B1 (en)
DE (1) DE69308373T2 (en)
ES (1) ES2097942T3 (en)
IT (1) IT1257540B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1270443B (en) * 1993-02-10 1997-05-05 Fiat Auto Spa VARIABLE GEOMETRY DISTRIBUTION CONTROL FOR AN INTERNAL COMBUSTION ENGINE.
DE9405442U1 (en) * 1994-03-31 1995-08-03 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen 4-valve piston internal combustion engine
EP0867601B1 (en) * 1997-03-27 2003-01-22 Toyota Jidosha Kabushiki Kaisha Valve driving apparatus for engine
DE102006047293A1 (en) * 2006-10-06 2008-04-10 Schaeffler Kg Valve drive for an internal combustion engine with displaceable space cam
DE102006058093A1 (en) * 2006-12-09 2008-06-12 Schaeffler Kg valve train

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179700B (en) * 1985-08-29 1989-08-09 Nissan Motor Rocker arm arrangement for multi-valve internal combustion engine
IT1195192B (en) * 1986-10-07 1988-10-12 Fiat Auto Spa VALVE CONTROL FOR CAMSHAFT ENGINES IN HEAD

Also Published As

Publication number Publication date
ITTO920440A0 (en) 1992-05-22
EP0570963A1 (en) 1993-11-24
DE69308373D1 (en) 1997-04-10
ES2097942T3 (en) 1997-04-16
ITTO920440A1 (en) 1993-11-22
DE69308373T2 (en) 1997-06-26
EP0570963B1 (en) 1997-03-05

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971223