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EP0232570B1 - Moteur à combustion interne - Google Patents

Moteur à combustion interne Download PDF

Info

Publication number
EP0232570B1
EP0232570B1 EP19860300518 EP86300518A EP0232570B1 EP 0232570 B1 EP0232570 B1 EP 0232570B1 EP 19860300518 EP19860300518 EP 19860300518 EP 86300518 A EP86300518 A EP 86300518A EP 0232570 B1 EP0232570 B1 EP 0232570B1
Authority
EP
European Patent Office
Prior art keywords
engine
block
bed plate
metal cylinder
cylinder head
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
Application number
EP19860300518
Other languages
German (de)
English (en)
Other versions
EP0232570A1 (fr
Inventor
Jean-Pierre Pirault
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.)
Ford Werke GmbH
Ford France SA
Ford Motor Co Ltd
Original Assignee
Ford Werke GmbH
Ford France SA
Ford Motor Co Ltd
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 Ford Werke GmbH, Ford France SA, Ford Motor Co Ltd filed Critical Ford Werke GmbH
Priority to DE8686300518T priority Critical patent/DE3673382D1/de
Publication of EP0232570A1 publication Critical patent/EP0232570A1/fr
Application granted granted Critical
Publication of EP0232570B1 publication Critical patent/EP0232570B1/fr
Expired 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
    • F02F7/0085—Materials for constructing engines or their parts
    • 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
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • 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
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/008—Sound insulation
    • 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
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/16—Fibres

Definitions

  • This invention relates to internal combustion engines and in particular to an internal combustion engine in which at least part of the engine structure is made of a plastics material.
  • Conventionally internal combustion engines are made from cast metal, either iron or aluminium.
  • GB-A 2 147 662 discloses an internal combustion engine which makes use of plastics material.
  • a cast iron frame provides the main structural strength of the block, but this frame is completed by separate cylinder liners supported in the frame and by plastics water jacket walls which clad the frame.
  • an internal combustion engine having a metal cylinder head, a block and a bed plate, whereby the bed plate serves to support crankshaft bearings against the block, and the engine is secured together by bolts extending between the cylinder head and the bed plate and through bores in the block, characterised in that the block is made from a plastics material with metal cylinder liners supported by the plastics material, and in that the bolts place the plastics material of the block in compression.
  • the joint between the block and the cylinder head has to perform three sealing functions. Firstly it must provide a gas seal for the combustion chamber which is formed partly in a cylinder in the block and partly in a combustion chamber in the head and which is at a relatively high pressure. Secondly it must provide a seal for cooling water which flows between the block and the head and thirdly it must provide a seal for lubricating oil which also travels between the block and the head.
  • the first of these (combustion gases) is at a very high pressure (for example 1000 psi).
  • the second and third are at relatively low pressures.
  • a metal cylinder liner is held tightly against the metal cylinder head (with an appropriate gasket between) to seal the gases in the combustion chamber.
  • sufficient sealing pressure can be generated between a plastic surface of the block and the metal cylinder head (with an appropriate gasket between).
  • the metal cylinder liners have an external annular rib, the rib can be seated against a shoulder formed as part of the plastics engine block. In this way, the engine block can be produced as a moulded plastics item which does not require any machining subsequent to moulding.
  • the cylinder liners will be wet cylinder liners.
  • the engine shown in Figure 1 is made up of a cylinder head 10, an engine block 12, a bed plate 14 and an oil pan 16.
  • the cylinder head 10 is of metal and in- dudes a socket 18 for receiving a camshaft in the conventional way to operate the engine valves.
  • the block 12 is of plastics, suitably a fibre-reinforced plastics material and contains the engine cylinders.
  • One half 20 of a crankshaft bearing is accommodated in the block 12, whilst the other half 22 of the bearing is accommodated in the bed 14.
  • the oil pan 16 serves to enclose a space within the engine for lubricating oil.
  • crankshaft is indicated in section at 28.
  • a wet cylinder liner 30 has an outer annular rib 32 which is supported on a shoulder 34 which is part of the block moulding 12. It will be appreciated that the liner 30 is of metal, and will have a machined internal surface, and the shoulder 34 on which the liner rests will be of plastics.
  • Figure 2 also shows a piston 36 in the cylinder liner 30 and a connecting rod 38 connecting the piston 36 to the crankshaft 28.
  • the bed plate 14 is shown in plan view, disassembled from the rest of the engine, in Figure 3.
  • the plate has bearing caps 40 for each bearing of a five-bearing crankshaft. Bores 42 at each end of each cap 40 accommodate the through bolts 24 which tie the whole engine together.
  • the caps 40 are connected up into a ladder-type structure by connecting webs 44 and outer walls 46. The presence of this connected structure at the lower end of the engine block provides additional torsional stiffness to support the crankshaft bearing loads.
  • the bed plate 14 may be made of metal or of plastics, depending on the required stiffness and the engine characteristics.
  • the plastics moulding technique used to produce the engine block 12 can be any suitable technique which will give the desired results. It is however anticipated that it may be advantageous to use a reinforced plastics material (e.g. a fibre reinforced material) and to increase the local reinforcement content at particular areas, notably on the faces 48 where the block seals against the cylinder head and on the surfaces of the shoulders 34 where the cylinder liners 30 are supported.
  • a reinforced plastics material e.g. a fibre reinforced material
  • bolts 50 are used. These extend through bores 52 in the bed plate 14 and into a threaded insert 54 in the block.
  • the inserts 54 may be omitted and the bolts 50 may extend right through the shoulder 56 on the block, where a nut can be attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (7)

1. Moteur à combustion interne comprenant une culasse métallique (10) de cylindre, un bloc (12) et une plaque de socle (14), la plaque de socle (14) servant à supporter des paliers (20, 22) de vilebrequin contre le bloc (12), et la solidarisation bridée du moteur étant assurée par des tirants (24) qui s'étendent entre la culasse (10) et la plaque de socle (14), et franchissent des trous pratiqués dans le bloc (12), caractérisé par le fait que le bloc (12) est fabriqué en une matière plastique, des chemises cylindriques métalliques (30) étant supportées par la matière plastique ; et par le fait que les tirants (24) imposent une compression à la matière plastique du bloc.
2. Moteur selon la revendication 1, caractérisé par le fait que la chemise cylindrique métallique est maintenue fortement serrée contre la culasse métallique de cylindre, avec interposition d'une garniture appropriée afin d'isoler de manière étanche les gaz renfermés par la chambre de combustion, et l'étanchéité des systèmes à huile et à eau est assurée par une garniture interposée entre une surface en matière plastique du bloc, et la culasse métallique de cylindre.
3. Moteur selon la revendication 1 ou la revendication 2, caractérisé par le fait que les chemises cylindriques métalliques comportent une nervure externe annulaire, et les nervures prennent appui contre un décrochement formant une partie du bloc-moteur en matière plastique.
4. Moteur selon une quelconque revendication précédente, caractérisé par le fait qu'une plaque de socle est prévue au-dessous du bloc-moteur, et tous les chapeaux des paliers du vilebrequin sont supportés par la plaque de socle.
5. Moteur selon la revendication 4, caractérisé par le fait que la plaque de socle est une structure en forme d'échelle.
6. Moteur selon la revendication 4 ou la revendication 5, caractérisé par le fait que la plaque de socle consiste en une matière plastique.
7. Moteur selon la revendication 4 ou la revendication 5, caractérisé par le fait que la plaque de socle consiste en un métal.
EP19860300518 1984-09-18 1986-01-27 Moteur à combustion interne Expired EP0232570B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8686300518T DE3673382D1 (de) 1986-01-27 1986-01-27 Brennkraftmaschine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08423555A GB2164702B (en) 1984-09-18 1984-09-18 An internal combustion engine cylinder block

Publications (2)

Publication Number Publication Date
EP0232570A1 EP0232570A1 (fr) 1987-08-19
EP0232570B1 true EP0232570B1 (fr) 1990-08-08

Family

ID=10566881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860300518 Expired EP0232570B1 (fr) 1984-09-18 1986-01-27 Moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0232570B1 (fr)
GB (1) GB2164702B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164702B (en) * 1984-09-18 1987-09-30 Ford Motor Co An internal combustion engine cylinder block
CA1328588C (fr) * 1987-05-15 1994-04-19 Honda Giken Kogyo Kabushiki Kaisha (Also Trading As Honda Motor Co., Ltd .) Moteur a combustion interne
KR100285438B1 (ko) * 1993-11-01 2001-04-02 정몽규 내연기관
US6116198A (en) 1997-07-21 2000-09-12 Cummins Engine Company, Inc. Replaceable cylinder liner with improved cooling
GB2350864A (en) * 1999-06-07 2000-12-13 Perkins Engines Co Ltd Containment and support assembly, eg for an engine or gearbox, with a rigid framework and lower density outer casing
DE102004044780A1 (de) * 2004-09-16 2005-08-25 Daimlerchrysler Ag Brennkraftmaschine mit V-förmig angeordneten Zylindern
DE102005004701A1 (de) * 2005-02-02 2006-08-10 Fev Motorentechnik Gmbh Kurbelgehäuse eines Hubkolbenverbrennungsmotors
CN112211741A (zh) * 2020-10-20 2021-01-12 苏州星波动力科技有限公司 局部采用塑料材质的内燃机气缸及其制造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3273107D1 (en) * 1981-05-20 1986-10-16 Nissan Motor Internal combustion engine with bearing beam structure
GB2140502B (en) * 1983-05-25 1987-03-18 Atomic Energy Authority Uk An engine including fibre reinforced plastics
US4644911A (en) * 1983-10-07 1987-02-24 Honda Giken Kogyo Kabushiki Kaisha Cylinder block for internal combustion engine
GB2164702B (en) * 1984-09-18 1987-09-30 Ford Motor Co An internal combustion engine cylinder block

Also Published As

Publication number Publication date
EP0232570A1 (fr) 1987-08-19
GB2164702A (en) 1986-03-26
GB8423555D0 (en) 1984-10-24
GB2164702B (en) 1987-09-30

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