EP1400668A2 - Camshaft drive mechanism configuration for an engine with a double line of cylinders - Google Patents

Camshaft drive mechanism configuration for an engine with a double line of cylinders Download PDF

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Publication number
EP1400668A2
EP1400668A2 EP03020153A EP03020153A EP1400668A2 EP 1400668 A2 EP1400668 A2 EP 1400668A2 EP 03020153 A EP03020153 A EP 03020153A EP 03020153 A EP03020153 A EP 03020153A EP 1400668 A2 EP1400668 A2 EP 1400668A2
Authority
EP
European Patent Office
Prior art keywords
internal
combustion engine
cylinders
control
engine
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.)
Withdrawn
Application number
EP03020153A
Other languages
German (de)
French (fr)
Inventor
Giorgio Bertero
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.)
Fiat Auto SpA
Original Assignee
Fiat Auto 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 Fiat Auto SpA filed Critical Fiat Auto SpA
Publication of EP1400668A2 publication Critical patent/EP1400668A2/en
Withdrawn legal-status Critical Current

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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
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • 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
    • 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
    • F01L1/022—Chain drive
    • 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
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement

Definitions

  • the present invention refers to the control device for the valves or internal-combustion motors presenting at least two lines of several identical cylinders and in which the control of the valves of each cylinder line is deputed to at least one camshaft.
  • the invention refers to a control device for engine of the aforementioned type which are quite reduced in size and which are able to utilise the same cylinder heads for both cylinder lines.
  • a secondary shaft is used, the shaft being placed on the longitudinal plane of symmetry, inside the V formed by the two lines of cylinders.
  • Said shaft will be obviously provided at its ends with two identical pinions or pulleys in the case of belt drive, which will control the camshafts by means of crowns or pulleys of adequate size, mounted on one of the two ends of said camshafts. This allows to have series of components of the engine which are fully identical and to make production less expensive.
  • a control device for an internal-combustion engine with two V lines of cylinders, as the one described above is shown in German Patent n.DE 3916512, by Ford Werke AG.
  • this control can have only a chain contro both between the drive and the secondary shaft and between the secondary shaft and the camshafts.
  • the drive on the drive shaft controls only the secondary shaft, without being used for different devices, mounted at the correct position in order to save the moving parts and the relative power absorption as well as manpower during the assembling stage.
  • reference number 1 indicates an internal-combustion V engine, with two lines of several cylinders 3 and 4, which are placed symmetrically in relationship to a longitudinal plane P passing through the axis of the drive shaft 5.
  • Each line of cylinders 3 and 4 presents at least a camshaft 8 and 9, provided with pulley gear 10 and 11 at one of its ends intended to control its valves.
  • two transmission devices 13 and 14 are present, the devices presenting a chain or a toothed belt and connecting the two crowns or toothed pulleys 10 and 11 on the camshafts, to two pinions or toothed pulleys 16 and 17 placed at the two ends of a secondary shaft 18.
  • the shaft 18 extends longitudinally between two lines or bearings of cylinders 3 and 4, with its axis preferably located on the symmetry plane P, so that the length of the two timing devices is the same, the way the camshaft mutually rotated by 180° are the same as well.
  • This arrangement of camshafts, pinions, crowns or toothed pulleys, secondary shaft and transmission system devices allows the two heads to be basically the same so that time can be saved and costs can be reduced.
  • the secondary shaft 18 is controlled by means of a chain or toothed belt transmission device 20. Said device is coupled to a pinion 21 at the end of the crankshaft 5 at one side and controls a crown or toothed pulley 22 fixed to the shaft 18.
  • the timing system device 20 is coupled to a second crown or toothed crown 24 which, according to the invention, is adapted to control a secondary device 26 of the internal-combustion engine, such as the cooling water pump or the generator.

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)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Control system for the valves of an internal-combustion engine with two V lines of cylinders, consisting of a secondary shaft to control the camshaft by means of chain or toothed belt drive, basically located at the centre of the V on the plane passing through the axis of the driving shaft of internal-combustion engine, and moved by it by means of the chain or toothed belt device. The control device controlling the secondary shaft, is adapted to control simultaneously a secondary device of said internal-combustion engine.

Description

  • The present invention refers to the control device for the valves or internal-combustion motors presenting at least two lines of several identical cylinders and in which the control of the valves of each cylinder line is deputed to at least one camshaft.
  • More in particular, the invention refers to a control device for engine of the aforementioned type which are quite reduced in size and which are able to utilise the same cylinder heads for both cylinder lines.
  • In order to achieve a simultaneous control of the two lines of cylinders with identical heads mutually rotated by 180°, a secondary shaft is used, the shaft being placed on the longitudinal plane of symmetry, inside the V formed by the two lines of cylinders. Said shaft will be obviously provided at its ends with two identical pinions or pulleys in the case of belt drive, which will control the camshafts by means of crowns or pulleys of adequate size, mounted on one of the two ends of said camshafts. This allows to have series of components of the engine which are fully identical and to make production less expensive.
  • A control device for an internal-combustion engine with two V lines of cylinders, as the one described above is shown in German Patent n.DE 3916512, by Ford Werke AG. However, this control can have only a chain contro both between the drive and the secondary shaft and between the secondary shaft and the camshafts. Besides, the drive on the drive shaft controls only the secondary shaft, without being used for different devices, mounted at the correct position in order to save the moving parts and the relative power absorption as well as manpower during the assembling stage.
  • It is an object of the present invention to provide a control system for the valves of an internal-combustion engine according to the characteristics set forth in claim one.
  • Additional characteristics and advantages of the present invention will become clear from the following description, provided as non-restrictive example and referring to the appended drawing which is a schematic perspective view of an internal-combustion engine with two V lines of cylinders and provided with a control for its valves according to the present invention.
  • With reference to the figure, reference number 1 indicates an internal-combustion V engine, with two lines of several cylinders 3 and 4, which are placed symmetrically in relationship to a longitudinal plane P passing through the axis of the drive shaft 5. Each line of cylinders 3 and 4 presents at least a camshaft 8 and 9, provided with pulley gear 10 and 11 at one of its ends intended to control its valves.
  • In order to control the two camshafts 8 and 9, two transmission devices 13 and 14 are present, the devices presenting a chain or a toothed belt and connecting the two crowns or toothed pulleys 10 and 11 on the camshafts, to two pinions or toothed pulleys 16 and 17 placed at the two ends of a secondary shaft 18. The shaft 18 extends longitudinally between two lines or bearings of cylinders 3 and 4, with its axis preferably located on the symmetry plane P, so that the length of the two timing devices is the same, the way the camshaft mutually rotated by 180° are the same as well. This arrangement of camshafts, pinions, crowns or toothed pulleys, secondary shaft and transmission system devices, allows the two heads to be basically the same so that time can be saved and costs can be reduced.
  • The secondary shaft 18 is controlled by means of a chain or toothed belt transmission device 20. Said device is coupled to a pinion 21 at the end of the crankshaft 5 at one side and controls a crown or toothed pulley 22 fixed to the shaft 18. However, according to the invention the timing system device 20 is coupled to a second crown or toothed crown 24 which, according to the invention, is adapted to control a secondary device 26 of the internal-combustion engine, such as the cooling water pump or the generator.

Claims (3)

  1. Control system for the valves of an internal-combustion engine (1) with two V lines of cylinders, consisting of a secondary shaft to control (18) the camshafts by means of chain or toothed belt transmission devices (13, 14), basically located at the centre of the V on the plane passing through the axis of the driving shaft (5) of the internal-combustion engine (1), and actuated by it by means of the chain or toothed belt device (20) characterised in that the timing system device (20) controlling the secondary shaft (18), is adapted to simultaneously control a secondary device (26) of said internal-combustion engine (1).
  2. Control system for the valves of an internal-combustion engine as claimed in claim 1, characterised in that the secondary device (26) is the pump for the cooling liquid.
  3. Control system for the valves of an internal-combustion engine as claimed in claim 1, characterised in that the secondary device (26) is a generator.
EP03020153A 2002-09-20 2003-09-05 Camshaft drive mechanism configuration for an engine with a double line of cylinders Withdrawn EP1400668A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20020822 2002-09-20
IT000822A ITTO20020822A1 (en) 2002-09-20 2002-09-20 DISTRIBUTION CONTROL FOR A MULTI-CYLINDER ENGINE WITH TWO FILES OF CYLINDERS.

Publications (1)

Publication Number Publication Date
EP1400668A2 true EP1400668A2 (en) 2004-03-24

Family

ID=31898515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020153A Withdrawn EP1400668A2 (en) 2002-09-20 2003-09-05 Camshaft drive mechanism configuration for an engine with a double line of cylinders

Country Status (4)

Country Link
US (1) US20040163616A1 (en)
EP (1) EP1400668A2 (en)
IT (1) ITTO20020822A1 (en)
PL (1) PL362105A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10337899A1 (en) * 2003-08-18 2005-03-17 Audi Ag Device for driving at least one overhead camshaft in internal combustion engine for motor vehicle has intermediate shaft beside crankshaft driven by crankshaft on forward side opposite force output side, driving driven wheel of camshaft

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006013941A1 (en) * 2006-03-17 2007-09-20 Weber Technology Ag V-engine e.g. diesel engine, for use in watercraft, has auxiliary shafts that are arranged lateral to crankshaft, where one auxiliary shaft and crankshaft are arranged in partition plane
JP5580026B2 (en) * 2009-12-10 2014-08-27 富士重工業株式会社 Valve drive apparatus for internal combustion engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3184438B2 (en) * 1995-09-29 2001-07-09 ヤマハ発動機株式会社 Internal combustion engine
EP1182338B1 (en) * 2000-08-25 2007-03-21 Honda Giken Kogyo Kabushiki Kaisha Auxiliary machinery mounting structure of an engine
JP3435143B2 (en) * 2001-03-09 2003-08-11 川崎重工業株式会社 Overhead cam type V engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10337899A1 (en) * 2003-08-18 2005-03-17 Audi Ag Device for driving at least one overhead camshaft in internal combustion engine for motor vehicle has intermediate shaft beside crankshaft driven by crankshaft on forward side opposite force output side, driving driven wheel of camshaft

Also Published As

Publication number Publication date
ITTO20020822A1 (en) 2004-03-21
PL362105A1 (en) 2004-03-22
US20040163616A1 (en) 2004-08-26

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