FR2479904A1 - Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase - Google Patents

Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase Download PDF

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Publication number
FR2479904A1
FR2479904A1 FR8007653A FR8007653A FR2479904A1 FR 2479904 A1 FR2479904 A1 FR 2479904A1 FR 8007653 A FR8007653 A FR 8007653A FR 8007653 A FR8007653 A FR 8007653A FR 2479904 A1 FR2479904 A1 FR 2479904A1
Authority
FR
France
Prior art keywords
fitted
light alloy
crankcase
cylinder
gas
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.)
Granted
Application number
FR8007653A
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French (fr)
Other versions
FR2479904B1 (en
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.)
ENFROY DANIEL
Original Assignee
ENFROY DANIEL
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 ENFROY DANIEL filed Critical ENFROY DANIEL
Priority to FR8007653A priority Critical patent/FR2479904A1/en
Publication of FR2479904A1 publication Critical patent/FR2479904A1/en
Application granted granted Critical
Publication of FR2479904B1 publication Critical patent/FR2479904B1/fr
Granted legal-status Critical Current

Links

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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • 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
    • F02B75/34—Ultra-small engines, e.g. for driving models
    • 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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/04—Cylinders; Cylinder heads  having cooling means for air cooling
    • F02F1/06—Shape or arrangement of cooling fins; Finned cylinders
    • F02F1/08—Shape or arrangement of cooling fins; Finned cylinders running-liner and cooling-part of cylinder being different parts or of different material
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

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)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The cylinder is cast from a light alloy (1). It has an internal ring (2) also made from light alloy fitted to join the valve and inlet or exhaust ports. The ring may also be fitted in the bore to form a wall for the passage of gas between the cylinder and crankcase, and guide the piston past bottom dead centre. The ring is fitted to small cylinders and can be mechanically retained by a stop.

Description

l'invention se rapporte à un procédé-de fabrication de cylindre pour moteur thermique. lie cylindre est caractérisé par la présence de lumières servant au balayage et l'alimentation du moteur.the invention relates to a method of manufacturing a cylinder for a heat engine. The cylinder is characterized by the presence of lights used for sweeping and supplying the engine.

Dans ce domaine, il est connu à ce jour la fabrication de cylindre dans lequel est ajustée, et sur toute sa longueur, une bague métallique épaulée, usinée de lumières se raccordant aux empreintes correspondantes obtenues de fonderie dans le cylindre en alliage léger.In this field, it is known to date the manufacture of a cylinder in which is adjusted, and over its entire length, a shouldered metal ring, machined from lights connecting to the corresponding imprints obtained from foundry in the light alloy cylinder.

L'inconvénient d'un tel système est la difficulté de raccorder correctement ces lumières ainsi que l'usinage et l'ajustage de la chemise : problèmes dus aux différences de coefficient de dilatation des matériaux utilisés source de fuites et d'un mauvais échange thermique.The disadvantage of such a system is the difficulty of correctly connecting these lights as well as the machining and fitting of the jacket: problems due to the differences in expansion coefficient of the materials used, source of leaks and poor heat exchange .

I1 est également connu la solution qui consiste à obtenir un cylindre monobloc dont les empreintes viennént de fonderie -au moyen de noyaux de formes diverses. I1 is also known the solution which consists in obtaining a monobloc cylinder whose imprints come from foundry - by means of cores of various shapes.

Ce procédé nécessite l'opération de fabrication de- ces noyaux complexes et fragiles pour I'utilisation en petites dimensions ; des portées trop faibles rendent l'opération délicate et imprécise pour un travail en série.This process requires the operation of manufacturing these complex and fragile cores for use in small dimensions; too low ranges make the operation delicate and imprecise for serial work.

Un nouveau procédé consiste à réaliser - un cylindre en alliage léger d'une fonderie en coquille métallique ; ses empreintes intérieures sont obtenues au moyen de broches démoulables, ceci afin d'obtenir les formes des canaux servant à l'alimentation des gaz ainsi que la ou les lumières d'échappement de ceux-ci.A new process consists in making - a light alloy cylinder of a metal shell foundry; its internal imprints are obtained by means of demouldable pins, this in order to obtain the shapes of the channels serving for the supply of the gases as well as the exhaust port or ports.

- une bague décolletée en alliage léger et .ajustée dans la partie basse du cylindre qui aura été préalablement alésé pour recevoir celle-ci.- a light alloy low-cut ring. adjusted in the lower part of the cylinder which will have been previously bored to receive it.

Bye dessin annexé est une coupe longitudinale de ce type de cylindre. Bye attached drawing is a longitudinal section of this type of cylinder.

On peut y distinguer la partie rep. 1 avec ses formes mou- lées et la bague rep. 2 rapportée et inmobilisée dans le logement tourné de la pièce 1, formant ainsi une paroie pour le passage des gaz provenant du carter vers le cylindre et une continuité de l'alésage pour guider le piston lors de son passage au point mort bas. We can distinguish the rep part. 1 with its molded shapes and the ring rep. 2 attached and immobilized in the turned housing of the part 1, thus forming a wall for the passage of gases from the casing to the cylinder and a continuity of the bore to guide the piston during its passage to bottom dead center.

Ce procédé est narticulièrement intéressant nour la fabri- cation de cylindre, en alliage léger, de micromoteurs où les dimensions se prêtent mal à une fabricacien précitée.This process is particularly interesting for the manufacture of a cylinder, in a light alloy, of micromotors where the dimensions lend themselves poorly to an abovementioned manufacturer.

Absence d'usinage tel le fraisage des lumières. Seules des onérations d'alésage et une fonderie sima fiée le rendent plus fiable et peu onéreux pour une fsbrication en série.No machining such as milling the lights. Only bore holes and a similar foundry make it more reliable and inexpensive for serial production.

I1 va de soi que diverses modifications et variante cons- tructives peuvent être apportées à la forme représent"e sans s'écarter du domaine de l'invention.  It goes without saying that various modifications and constructive variants can be made to the represented form without departing from the scope of the invention.

Claims (4)

REVEDICATIONS 1. Dispositif de guidage inférieur d'un cylindre (1), en alliage léger Possédant des empreintes intérieures sécantes à l'alésage pour le passage des gaz provenant du carter, caractérisé par une bague rapportée (2) et emmanchée à la presse dans celui-ci, assurant ainsi la continuité de cet alésage.1. Lower guide device for a cylinder (1), made of light alloy With intersecting indentations in the bore for the passage of gases from the casing, characterized by an attached ring (2) and press fitted into that -this, thus ensuring the continuity of this bore. 2. Dispositif selon la revendication 1. caractérisé pr le fait que la bague rapnortée (2) est collée dans (1)2. Device according to claim 1. characterized in that the attached ring (2) is glued in (1) 3. Dispositif selon la revendication 1. caractérisé par le fait que la bague rapportée (2) est immobilisée par un arrêt mécanique quelconque connu.3. Device according to claim 1. characterized in that the added ring (2) is immobilized by any known mechanical stop. 4. Dispositif selon la revendication 1 caractérisé par le fait que la bague rapportée (2) dépasse du cylindre (1) et sert de centrage dans le carter moteur. 4. Device according to claim 1 characterized in that the added ring (2) protrudes from the cylinder (1) and serves as centering in the crankcase.
FR8007653A 1980-04-04 1980-04-04 Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase Granted FR2479904A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8007653A FR2479904A1 (en) 1980-04-04 1980-04-04 Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8007653A FR2479904A1 (en) 1980-04-04 1980-04-04 Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase

Publications (2)

Publication Number Publication Date
FR2479904A1 true FR2479904A1 (en) 1981-10-09
FR2479904B1 FR2479904B1 (en) 1983-11-04

Family

ID=9240552

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8007653A Granted FR2479904A1 (en) 1980-04-04 1980-04-04 Light alloy engine cylinder - is fitted with guide rings forming ports allowing passage of gas from crankcase

Country Status (1)

Country Link
FR (1) FR2479904A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558530A1 (en) * 1984-01-23 1985-07-26 Steyr Daimler Puch Ag Cast cylinder for two-stroke internal combustion engines
US4802447A (en) * 1985-12-17 1989-02-07 Brunswick Corporation Foam pattern for engine cylinder block
DE10361293B4 (en) * 2003-12-24 2017-07-13 Andreas Stihl Ag & Co. Kg Cylinder of an internal combustion engine for a hand-held implement
EP3105444A4 (en) * 2014-02-13 2017-09-20 Cobra Aero LLC Multi-piece cylinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412234C (en) * 1923-07-15 1925-04-16 Hans Glaser Two-stroke internal combustion engine with crankcase and load pump
FR1081882A (en) * 1953-05-09 1954-12-23 Particular device of the gas transfer channels on an internal combustion engine
FR1156332A (en) * 1955-12-24 1958-05-14 Cylinder for injection internal combustion engine with air cooling
FR2311929A1 (en) * 1975-05-22 1976-12-17 Outboard Marine Corp INTERNAL COMBUSTION ENGINE SUPPLY BY SUCCESSIVE SUPPLY OF SCAN AIR, COMBUSTION AIR AND FUEL

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412234C (en) * 1923-07-15 1925-04-16 Hans Glaser Two-stroke internal combustion engine with crankcase and load pump
FR1081882A (en) * 1953-05-09 1954-12-23 Particular device of the gas transfer channels on an internal combustion engine
FR1156332A (en) * 1955-12-24 1958-05-14 Cylinder for injection internal combustion engine with air cooling
FR2311929A1 (en) * 1975-05-22 1976-12-17 Outboard Marine Corp INTERNAL COMBUSTION ENGINE SUPPLY BY SUCCESSIVE SUPPLY OF SCAN AIR, COMBUSTION AIR AND FUEL

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558530A1 (en) * 1984-01-23 1985-07-26 Steyr Daimler Puch Ag Cast cylinder for two-stroke internal combustion engines
US4802447A (en) * 1985-12-17 1989-02-07 Brunswick Corporation Foam pattern for engine cylinder block
DE10361293B4 (en) * 2003-12-24 2017-07-13 Andreas Stihl Ag & Co. Kg Cylinder of an internal combustion engine for a hand-held implement
EP3105444A4 (en) * 2014-02-13 2017-09-20 Cobra Aero LLC Multi-piece cylinder

Also Published As

Publication number Publication date
FR2479904B1 (en) 1983-11-04

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