WO2008111695A1 - Moteur rotatif - Google Patents

Moteur rotatif Download PDF

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Publication number
WO2008111695A1
WO2008111695A1 PCT/KR2007/001236 KR2007001236W WO2008111695A1 WO 2008111695 A1 WO2008111695 A1 WO 2008111695A1 KR 2007001236 W KR2007001236 W KR 2007001236W WO 2008111695 A1 WO2008111695 A1 WO 2008111695A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary
housing
cylinder
rotary engine
rotary cylinder
Prior art date
Application number
PCT/KR2007/001236
Other languages
English (en)
Inventor
Jin-Gieong Go
Original Assignee
Himtool 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 Himtool Co., Ltd. filed Critical Himtool Co., Ltd.
Priority to PCT/KR2007/001236 priority Critical patent/WO2008111695A1/fr
Publication of WO2008111695A1 publication Critical patent/WO2008111695A1/fr

Links

Classifications

    • 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
    • F02B57/00—Internal-combustion aspects of rotary engines in which the combusted gases displace one or more reciprocating pistons
    • 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
    • F01B13/00—Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion
    • F01B13/02—Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion with one cylinder only

Definitions

  • the present invention relates to rotary engines. More particularly, the present invention relates to a rotary engine that performs all operations of intake, compression, expansion by combustion and exhaust only by a circular motion in place of a linear motion, and that produces power via generation of an expansion force by burning a compressed fuel-air gas mixture, which is formed by mixing clean air introduced into a rotary cylinder while forcing the gas mixture having completed work to be pushed out of the cylinder, and a fuel injected into the cylinder while the interior space of the cylinder is shrunk and compressed.
  • a compressed fuel-air gas mixture which is formed by mixing clean air introduced into a rotary cylinder while forcing the gas mixture having completed work to be pushed out of the cylinder, and a fuel injected into the cylinder while the interior space of the cylinder is shrunk and compressed.
  • a rotary engine has the construction of directly converting an expansion force of gas into the circular movement and thus does not experience anywhere near the problems of the conventional piston engine. Since the rotary engine neither performs the linear reciprocation nor has the valves, it has merits such as a small number of components, low noise, small size and light weight. Such merits of the rotary engine have promoted development of various rotary engines. However, since only the rotary engine invented by German engineer Wankel among various rotary engines has been put into practical use, the rotary engine generally refers to a "Wankel rotary engine.”
  • a roughly triangular rotor both rotates once about its axis and makes three orbital revolutions about a spinning shaft during three rotations of the spinning shaft, for which three corners of the rotor meanderingly rotate along an inner wall of an oval-like epitrochoid- shaped housing to change the sizes of three spaces inside the housing, performing operations of intake, compression, expansion by combustion, and exhaust.
  • the Wankel rotary engine has merits as follows. Since all the gravity centers of the components make the circular movement, it is possible to easily remove vibration only with a balancing weight, which lowers the mechanical loss. In addition, the Wankel rotary engine provides a uniform torque by a single combustion for each rotation of the spinning shaft, has a small number of components due to no need of the valves and connecting rods for converting the linear reciprocation into the circular movement, and experiences low friction-related energy loss. As a result, the Wankel rotary engine can be operated quietly at very high speed, and produces as much power as the piston engine about twice the size of the piston engine.
  • the Wankel rotary engine suffers from problems as follows. Since a corner-gap sealing pad is disposed on each triangular corner of the rotor and directly contacts flame, it becomes lowered in endurance and suffers from great friction. In addition, while the corner-gap sealing pad passes through a connection hole between an igniter and a combustion chamber, there is leakage of gas due to failure of sealing the corner gap by the corner-gap sealing pad. Furthermore, every point of side sealing pads moves along their epitrochoids different from each other and scratches a lateral side of the housing with non-uniform friction.
  • the engine experiences an overlap phenomenon, which is severe in the case where the intake and exhaust ports are positioned around the housing.
  • the intake and exhaust ports are positioned on the lateral side of the housing, it is possible to prevent the overlap phenomenon, whereas the gas mixture makes whirlpool, making it difficult to perform intake of air and provide non-uniform flame when the whirlpool rotates at high speed.
  • the Wankel rotary engine is lowered in efficiency and causes severe air pollution.
  • the Wankel rotary engine is difficult to manufacture due to the epitrochoid inner surface of the housing, to increase a compression ratio, and to manipulate and repair the components thereof due to different thermal expansion coefficients of the components.
  • a rotary engine disclosed in Korean Patent No. 0109268 filed on 1993 by the inventor of the present invention does not suffer from the aforementioned problems of the Wankel rotary engine.
  • the rotary engine of the inventor comprises two rotary devices, each of which has a rotary cylinder making a single rotation to suck and supply gas while a spinning shaft rotates twice, and discharges the gas after performing combustion and expansion of the gas to produce power while the gas sucked and compressed into the one rotary device is moved to another rotary device.
  • a rotary engine has a problem in that two or three rotary devices are required to constitute the rotary engine. Disclosure of Invention
  • a rotary engine comprises: a housing having a cylindrical interior space, an intake port through which air is introduced into the housing, and an exhaust port through which a gas having completed work is exhausted to an outside of the housing; a pair of disc-shaped housing cover plates, each including a smaller disc attached to an inner center of the cover plate and having a spinning shaft-hole formed at a location deviated from a center of the smaller disc; a rotary cylinder having inner walls facing each other, and an outer surface rounded to allow idling of the rotary cylinder and having a size corresponding to that of an inner surface of the housing; a rotary piston interposed between the inner walls of the rotary cylinder to divide a space of the rotary cylinder into two spaces and reciprocate along the inner walls of the rotary cylinder, the rotary piston having a cylindrical shaft-hole formed through a center of the rotary piston; a revolving shaft rotatably fitted into the shaft-hole formed through the center of the rotary rotary
  • intake and exhaust ports are opened or closed in association with a circular movement of the rotary engine such that the exhaust port can be opened earlier than the intake port.
  • the rotary piston further includes recessed combustion chambers defined on both faces of the rotary piston facing the opposite spaces inside the cylinder, respectively.
  • the housing may further include an igniter or a fuel injection device to inject a fuel.
  • the rotary engine according to the present invention can remove vibration only with a balancing weight and produce a greater output than expected in view of its size because the spinning shaft produces power by generation of an expansion force in each rotation.
  • FIG. 1 is a cross-sectional view of a rotary engine according to one embodiment of the present invention.
  • FIG. 2 is an exploded view of the rotary engine according to the embodiment of the present invention.
  • FIGs. 3 to 5 are cross-sectional views of a rotary engine according to another embodiment of the present invention.
  • FIG. 6 is a flow diagram of an operation of a rotary engine according to the present invention. Best Mode for Carrying Out the Invention
  • FIG. 1 is a cross-sectional view of a rotary engine according to one embodiment of the present invention
  • Fig. 2 is an exploded view of the rotary engine according to the embodiment
  • Figs. 3 to 5 are cross-sectional views of a rotary engine according to another embodiment of the invention.
  • the rotary engine of the invention comprises a housing 5, a rotary cylinder 4, and a rotary piston 3, into which a revolving shaft 2 having a spinning shaft 1 eccentrically secured therein is fitted into the rotary piston 3.
  • the housing 5 has a cylindrical interior space and is formed with an intake port 6 and an exhaust port 7.
  • a pair of housing cover plates 11 is firmly secured to opposite sides of the cylindrical housing 5 to close the housing 5 and serves to support the spinning shaft 1 and rotors thereof.
  • Each of the housing cover plates 11 includes a disc plate and a smaller disc plate attached to an inner center of the disc plate to form a stepped portion, and has a spinning shaft hole 12 formed at a location deviated from the center on top of the stepped portion.
  • the stepped portion is fitted into a cover plate for the rotary cylinder 4 and serves as a shaft of the rotary cylinder 4.
  • the rotary engine may further comprise an injection device 9 at a suitable location around the housing 5 to inject a fuel. Since a conventional diesel engine ignites by injecting a diesel fuel in a short period of time, during which the gas mixture is compressed, time for mixing the fuel with air is insufficient. For the rotary engine of the invention, however, the fuel can be injected into the air for a long period of time from a starting point to an ending point of a compression cycle and over a wide space in the rotary cylinder 4 which rotates, so that the fuel can be uniformly mixed with the air. It can also be contemplated that the fuel- air gas mixture is introduced into the rotary cylinder using a blower or an air pump (not shown) in place of the injection device 9.
  • An igniter 8 is further provided to the housing 5 to ignite the compressed gas mixture by creating a spark near the time of completing the compression.
  • This construction is better shown in Fig. 3.
  • the rotary engine of the invention may employ the injection device 9 to cause spontaneous ignition by injecting the fuel to sufficiently compressed air without using a separate igniter 8. This construction is shown in Fig. 4.
  • the rotary cylinder 4 has a rounded outer surface corresponding to a rounded inner surface of the housing 5, and planar inner surfaces facing each other.
  • the rotary cylinder 4 is precisely fitted into the housing 5 to cause orbital revolution.
  • the rotary piston 3 is reciprocably disposed between the inner planes of the rotary cylinder 4 facing each other to divide the interior space of the rotary cylinder into two spaces and has a cylindrical hole formed through the center of the rotary piston 3.
  • recessed combustion chambers 10 are defined on two faces of the rotary piston 3 facing the interior spaces of the rotary cylinder 4, respectively. As shown in Fig.5, spaces may be defined between the rotary piston 3 and the housing 4 so as to serve as the combustion chambers 10.
  • the revolving shaft 2 is fitted into the hole formed through the center of the rotary piston 3 and has the spinning shaft 1 secured at a location deviated from the center of the revolving shaft 2.
  • the spinning shaft 1 starts spinning, the revolving shaft 2 causes the spinning shaft 1 to revolve.
  • FIG. 6 shows the operation of the rotary engine according to the exemplary embodiment of the invention in sequence of a- b-c-d-e-f-a.
  • both the intake and exhaust ports 6 and 7 are opened, clean air is introduced into the intake port 6 by the blower or the air pump while forcing the gas having completed the work to be pushed to the outside through the exhaust port 6.
  • both the intake and exhaust ports 6 and 7 are closed and the air is mixed with a fuel injected by the injection device 9 while the air is compressed. At this time, since the fuel is injected for a relatively long period of time in a wide space inside the rotary cylinder 4 during half rotation of the spinning shaft 1, it can be uniformly mixed with the air.
  • the intake port 6 be formed to have a larger space (not shown) to allow the intake port 6 to be somewhat opened even after the exhaust port 7 is closed by the rotary cylinder 4.
  • This can be achieved by forming the intake and exhaust ports 6 and 7 to have the same size while arranging the intake port 6 to be located slightly behind the exhaust port 7 in the rotational direction of the rotary cylinder 4 rather than arranging the intake and exhaust ports 6 and 7 in a line. That is to say, the intake and exhaust ports 6 and 7 are located in a line around the housing such that the exhaust port 7 is opened and closed earlier than the intake port 6 by rotation of the rotary cylinder 4. With this configuration, while only the intake port 6 is opened with the exhaust port 7 closed, it is possible to further increase a compression ratio by forcibly providing air into the cylinder by means of the air pump.
  • the rotary engine With a simple construction of allowing intake and exhaust ports to be opened and closed by a circular movement of a rotary cylinder, the rotary engine is light and has a reduced size due to a small number of components. In the rotary engine, the center of gravity of all components makes only the circular movement, enabling complete prevention of vibration. Furthermore, even though the rotary engine rotates faster and faster, the rotary engine does not experience interference caused by inertia of machines unlike a piston engine. Therefore, since the rotary engine according to the invention can rotate at very high speed, it produces an increased output.

Landscapes

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

Abstract

L'invention porte sur un moteur rotatif exécutant tous les temps d'admission, compression, détente par la combustion et échappement, uniquement dans un mouvement circulaire au lieu d'un mouvement linéaire, et obtenant sa puissance par la production d'une force d'expansion résultant de la combustion d'un mélange comprimé air frais/carburant introduit dans un cylindre tournant, et qui après avoir accompli son travail s'échappe du cylindre.
PCT/KR2007/001236 2007-03-13 2007-03-13 Moteur rotatif WO2008111695A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/001236 WO2008111695A1 (fr) 2007-03-13 2007-03-13 Moteur rotatif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/001236 WO2008111695A1 (fr) 2007-03-13 2007-03-13 Moteur rotatif

Publications (1)

Publication Number Publication Date
WO2008111695A1 true WO2008111695A1 (fr) 2008-09-18

Family

ID=39759624

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/001236 WO2008111695A1 (fr) 2007-03-13 2007-03-13 Moteur rotatif

Country Status (1)

Country Link
WO (1) WO2008111695A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091798A1 (it) * 2009-10-19 2011-04-20 Luigi Greppi Motore a combustione interna con cilindri rotanti.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537162A (en) * 1981-12-21 1985-08-27 Kienle Gerhard K Internal combustion engine having a rotating piston assembly
JPS60184931A (ja) * 1984-03-02 1985-09-20 Toshihiro Fujita ロ−タリ−エンジン
JPH03182631A (ja) * 1989-12-12 1991-08-08 Seizo Usui ４サイクルロータリーピストンエンジン
WO1993018286A1 (fr) * 1992-03-13 1993-09-16 Johann Josef Grabner Moteur a combustion interne
KR20070045834A (ko) * 2005-10-28 2007-05-02 (주)힘틀 맴돌이 엔진

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537162A (en) * 1981-12-21 1985-08-27 Kienle Gerhard K Internal combustion engine having a rotating piston assembly
JPS60184931A (ja) * 1984-03-02 1985-09-20 Toshihiro Fujita ロ−タリ−エンジン
JPH03182631A (ja) * 1989-12-12 1991-08-08 Seizo Usui ４サイクルロータリーピストンエンジン
WO1993018286A1 (fr) * 1992-03-13 1993-09-16 Johann Josef Grabner Moteur a combustion interne
KR20070045834A (ko) * 2005-10-28 2007-05-02 (주)힘틀 맴돌이 엔진

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091798A1 (it) * 2009-10-19 2011-04-20 Luigi Greppi Motore a combustione interna con cilindri rotanti.
EP2312121A1 (fr) * 2009-10-19 2011-04-20 Luigi Greppi Moteur à combustion à cylindres rotatifs

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