US3673990A - Internal combustion engines with at least two rows of cylinders with overhead camshafts - Google Patents

Internal combustion engines with at least two rows of cylinders with overhead camshafts Download PDF

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Publication number
US3673990A
US3673990A US65431A US3673990DA US3673990A US 3673990 A US3673990 A US 3673990A US 65431 A US65431 A US 65431A US 3673990D A US3673990D A US 3673990DA US 3673990 A US3673990 A US 3673990A
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United States
Prior art keywords
cylinders
rows
camshafts
engine
internal combustion
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.)
Expired - Lifetime
Application number
US65431A
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English (en)
Inventor
Giulio Alfieri
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Maserati SpA
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Officine Alfieri Maserati SpA
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Publication of US3673990A publication Critical patent/US3673990A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0021—Construction
    • F02F7/0031—Construction kit principle (modular engines)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/12—Separate cylinder-crankcase elements coupled together to form a unit
    • 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
    • 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
    • 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
    • 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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type

Definitions

  • a Vform internal combustion engine includes two rows of cylinders with overhead camshafts driven by an intermediate shaft arranged between the two rows of cylinders parallel to the latter and itself rotated by the crankshaft of the engine through a generally reducing transmission device,
  • the two transmission devices include two drive gears keyed on the in terrnediate shaft at positions selected so that the corresponding driven gears borne by the camshafts are situated between two cams relating to two successive cylinders of the corresponding row of cylinders, whereby reduction in the length of the Camshafts and in the engine cylinder heads is effected 3 Claims, 4 Drawing Figures INTERNAL COMBUSTION ENGINES WITH AT LEAST TWO ROWS OF CYLINDERS WITH OVERHEAD CAMSHAFIS
  • the invention relates to internal combustion engines including at least two similar rows of several cylinders in each of which the valves of the cylinders are actuated by
  • the internal combustion engine comprises at least two similar rows of several cylinders in each of which the valves of the cylinders are actuated by at least one overhead camshaft, the camshaft of the two rows of cylinders being rotated, by means of two chain or notched belt and pinion transmission devices, by an intermediate shaft arranged between the said rows of cylinders parallel to the latter and itself rotated by the crankshaft of the engine through a generally reducing transmission device, the said engine being characterized by the fact that the two said transmission devices comprise respectively two drive gears keyed on the said intermediate shaft at emplacements selected so that the corresponding driven gears borne by the carnshafts are situated between two cams relating to two successive cylinders of the corresponding row of cylinders, this arrangement enabling reduction in the length of the camshafts and in the engine's cylinder heads.
  • the driven gears of the two corresponding camshafts belong respectively to two similar rows of several cylinders, occupy symmetrical positions with respect to the axis enabling the cylinder heads of the two rows of cylinders to be made to coincide theoretically by a rotation of 180 around their axis, whereby it is possible to adopt identical cylinder heads for the two said rows of cylinders, which obviously constitutes an economy in the cost of manufacture of the engine.
  • the said intermediate shaft for driving, directly or indirectly, accessories borne by the engine or by the structure equipped with this engine (body in the case of an engine for an automobile vehicle), the accessory transmission system, in the latter case, being advantageously capable of being a flexible transmission system protecting the said accessory from the vibrations of the engine.
  • the intermediate shaft could be made to include an extension intended to receive an accessory or a drive for the actuation of such an accessory.
  • the intermediate shaft could advantageously be provided as tubular.
  • the invention relates more particularly, and this by way of new industrial products, to engines of the type concerned including the application of the previously explained features, as well as the special elements and tools adapted for their manufacture and the assemblies or installations, fixed or movable, especially automobile vehicles, equipped with similar engines.
  • FIGS. 1 and 2 show, in diagrammatic manner, respectively in end view in the direction of the arrow I FIG. 2 and in plan of view, an embodiment of a V form engine constructed according to the invention
  • FIGS. 3 and 4 are diagrammatical cross-sections effected respectively along the lines III-III and IVIV of FIG. 2.
  • the engine shown in end view in FIG. 1 and in plan view in FIG. 2 is an internal combustion engine with two rows of several cylinders Ia and lb (for example four cylinders per row) arranged symmetrically with respect to the longitudinal plane P passing through the axis of the crankshaft 2 of the engrne.
  • the cylinders of one of the rows are preferably slightly displaced longitudinally with respect to the cylinders of the other row, the two rows of cylinders having however a symmetry with respect to an axis XX situated in the plan P oriented perpendicularly to the axis of the crankshaft, which symmetry enables theoretically the row of cylinders Ia to be made coincide with the row of cylinders lb by rotation of the said row cylinders In by l around this axis XX.
  • Each row of the cylinders is equipped, for control of its valves, with at least one camshaft and, preferably, with two camshafis 40 for the row of cylinders 10 and 4b for the row of cylinders lb, two cams relating to the successive cylinders being denoted by the reference 4 on each of the respective camshaft.
  • the transmission devices 60 and 6b intended for the actuation of the pairs of camshafts 4a and 4b are ranged in emplacements such that, along the intermediate shaft 7, the driven gears (11a for the transmission device 6a and llb for the transmission device 6b) keyed on the camshafts are situated between the cams 5 relating to two successive cylinders of the row of the cylinders concerned as clearly visible in FIG. 2.
  • the driven gears Ila relating to one of the rows of cylinders Ia, have a symmetry, with respect to the axis of symmetry XX of the two rows of cylin ders, with the corresponding driven gears llb relating to the other row of cylinders, which enables then the provision of identical cylinder heads for the two rows of cylinders and of the two cylinder covers 12a and 12b (shown in mixed line in FIG. 2), also identical.
  • cylinder head covers Ila and 12b can then be of H form with the transverse bar of the H displaced, the said bar being situated at the level of the corresponding transmission device 6a or 6b.
  • Each transmission system 6a and 6b can then include, as shown in FIG. 3 for the system 6a and FIG. 4 for the system 6b, a chain (13a or 13b) passing over the corresponding driven pinions (Ila or 11b), over a drive gear (14a or 14b) keyed on the intermediate shaft 7 and on a tensioner or 15b.
  • the intermediate shah 7 includes, on the opposite side to its drive gear 10, an extension 70 projecting beyond the rows of cylinders and on which is keyed the rotor of a rotary accessory such, for example, as a water pump 16.
  • the abovesaid shaft can also bear, in its part between two rows of cylinders, other rotary elements to actuate, for example a gear 17 for driving an ignition device and a drive means 18 for an external accessory.
  • intermediate shaft 7 can be provided as tubular.
  • the invention is in no way limited to that of its methods of application, nor to those of its methods of production of its various parts, which have been more particularly envisaged, it embraces, on the contrary, all variations.
  • an interchangeable overhead camshaft drive arrangement wherein the camshafts of the two rows of cylinders are rotated, through two chain or notched belt transmission devices and gears, through an intennediate shaft arranged between said rows of cylinders parallel to the latter and itself rotated by the crankshaft of the engine through a generally reducing transmission device, the two said transmission devices including respectively two drive gears keyed on the said intermediate shaft at positions selected so that the corresponding driven gears borne by the camshafts are situated between two cams relating to two successive cylinders of the corresponding row of cylinders, whereby reduction in the length of the camshafts and in the engine cylinder head is effected, wherein the driven gears of two corresponding camshafts, belonging respectively to the two similar rows of several cylinders, occupy symmetrical positions with respect to the axis enabling the cylinder heads of the two rows of cylinders to be made theoretically to coincide by rotation through

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US65431A 1969-08-25 1970-08-20 Internal combustion engines with at least two rows of cylinders with overhead camshafts Expired - Lifetime US3673990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT475269 1969-08-25

Publications (1)

Publication Number Publication Date
US3673990A true US3673990A (en) 1972-07-04

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US65431A Expired - Lifetime US3673990A (en) 1969-08-25 1970-08-20 Internal combustion engines with at least two rows of cylinders with overhead camshafts

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US (1) US3673990A (US07608600-20091027-C00054.png)
DE (1) DE2041964A1 (US07608600-20091027-C00054.png)
ES (1) ES382996A1 (US07608600-20091027-C00054.png)
FR (1) FR2059220A5 (US07608600-20091027-C00054.png)
GB (1) GB1289580A (US07608600-20091027-C00054.png)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951123A (en) * 1974-11-27 1976-04-20 Rohr Industries, Inc. Engine driven accessory mounting and drive system for buses and other vehicles
US4583504A (en) * 1984-07-16 1986-04-22 Outboard Marine Corporation Lawn mower gear reduction system
US4610224A (en) * 1984-12-20 1986-09-09 Toyota Jidosha Kabushiki Kaisha Configuration for V type double overhead cam shaft engine utilizing interchangable intake cam shafts and interchangable exhaust cam shafts
US4632073A (en) * 1984-05-16 1986-12-30 Yamaha Hatsudoki Kabushiki Kaisha Camshaft mounting mechanism for DOHC engine of motorcyle
US4658769A (en) * 1985-04-17 1987-04-21 Toyota Jidosha Kabushiki Kaisha V-type internal combustion engine with centrally located drive gears coupling double overhead camshafts
US4674452A (en) * 1985-05-29 1987-06-23 Mazda Motor Corporation Camshaft driving system for internal combustion engine
US4729348A (en) * 1986-04-23 1988-03-08 Mazda Motor Corporation Cylinder head structure for V-type engine
US4776307A (en) * 1986-09-06 1988-10-11 Audi Ag Multi-cylinder/combustion engine
US4993374A (en) * 1988-03-31 1991-02-19 Yamaha Hatsudoki Kabushiki Kaisha Engine unit for motor vehicle
US5154144A (en) * 1989-08-23 1992-10-13 Yamaha Hatsudoki Kabushiki Kaisha Camshaft drive arrangement for engine
US5970931A (en) * 1996-08-22 1999-10-26 Fuji Jukogyo Kabushiki Kaisha Camshaft driving mechanism
US20050166878A1 (en) * 2004-01-30 2005-08-04 Hartley John J.Jr. Camshaft drive mechanism

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572654Y2 (US07608600-20091027-C00054.png) * 1976-02-17 1982-01-18
DE3125077A1 (de) * 1981-06-26 1983-01-13 Bayerische Motoren Werke AG, 8000 München Zweizylinder-viertakt-boxermotor, insbesondere fahrtwindluftgekuehlt fuer motorraeder
DE3421028A1 (de) * 1984-06-06 1985-12-12 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Nockenwellenantrieb einer brennkraftmaschine
DE3916512C1 (US07608600-20091027-C00054.png) * 1989-05-20 1990-05-10 Ford-Werke Ag, 5000 Koeln, De
DE3921716A1 (de) * 1989-07-01 1991-01-10 Porsche Ag Nockenwellenantrieb eines mehrzylinder-v-motors
GB8923181D0 (en) * 1989-10-13 1989-11-29 Rover Group An internal combustion engine
JP2950953B2 (ja) * 1990-09-04 1999-09-20 ヤマハ発動機株式会社 ４サイクルエンジンの動弁装置
GB2392476B (en) * 2002-08-28 2004-09-15 Banyard Keith David Bottom ends for engines with more than one cylinder bank
DE102006013940A1 (de) * 2006-03-17 2007-09-20 Weber Technology Ag V-Motor mit drehbaren Zylinderköpfen

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951123A (en) * 1974-11-27 1976-04-20 Rohr Industries, Inc. Engine driven accessory mounting and drive system for buses and other vehicles
US4632073A (en) * 1984-05-16 1986-12-30 Yamaha Hatsudoki Kabushiki Kaisha Camshaft mounting mechanism for DOHC engine of motorcyle
US4583504A (en) * 1984-07-16 1986-04-22 Outboard Marine Corporation Lawn mower gear reduction system
US4610224A (en) * 1984-12-20 1986-09-09 Toyota Jidosha Kabushiki Kaisha Configuration for V type double overhead cam shaft engine utilizing interchangable intake cam shafts and interchangable exhaust cam shafts
US4658769A (en) * 1985-04-17 1987-04-21 Toyota Jidosha Kabushiki Kaisha V-type internal combustion engine with centrally located drive gears coupling double overhead camshafts
US4674452A (en) * 1985-05-29 1987-06-23 Mazda Motor Corporation Camshaft driving system for internal combustion engine
US4729348A (en) * 1986-04-23 1988-03-08 Mazda Motor Corporation Cylinder head structure for V-type engine
US4776307A (en) * 1986-09-06 1988-10-11 Audi Ag Multi-cylinder/combustion engine
US4993374A (en) * 1988-03-31 1991-02-19 Yamaha Hatsudoki Kabushiki Kaisha Engine unit for motor vehicle
US5154144A (en) * 1989-08-23 1992-10-13 Yamaha Hatsudoki Kabushiki Kaisha Camshaft drive arrangement for engine
US5970931A (en) * 1996-08-22 1999-10-26 Fuji Jukogyo Kabushiki Kaisha Camshaft driving mechanism
US20050166878A1 (en) * 2004-01-30 2005-08-04 Hartley John J.Jr. Camshaft drive mechanism
US7168405B2 (en) * 2004-01-30 2007-01-30 Hartley Jr John J Camshaft drive mechanism

Also Published As

Publication number Publication date
DE2041964A1 (de) 1971-05-27
ES382996A1 (es) 1972-12-16
FR2059220A5 (US07608600-20091027-C00054.png) 1971-05-28
GB1289580A (US07608600-20091027-C00054.png) 1972-09-20

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