WO2013122380A1 - Appareil pour modifier un taux de compression - Google Patents

Appareil pour modifier un taux de compression Download PDF

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Publication number
WO2013122380A1
WO2013122380A1 PCT/KR2013/001120 KR2013001120W WO2013122380A1 WO 2013122380 A1 WO2013122380 A1 WO 2013122380A1 KR 2013001120 W KR2013001120 W KR 2013001120W WO 2013122380 A1 WO2013122380 A1 WO 2013122380A1
Authority
WO
WIPO (PCT)
Prior art keywords
eccentric member
crank pin
eccentric
connecting rod
compression ratio
Prior art date
Application number
PCT/KR2013/001120
Other languages
English (en)
Korean (ko)
Inventor
맹호재
Original Assignee
Maeng Ho Jae
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
Priority claimed from KR1020120075130A external-priority patent/KR101354163B1/ko
Application filed by Maeng Ho Jae filed Critical Maeng Ho Jae
Publication of WO2013122380A1 publication Critical patent/WO2013122380A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/02—Varying compression ratio by alteration or displacement of piston stroke

Definitions

  • the present invention relates to a compression ratio variable device, and more particularly to a compression ratio variable device that can vary the compression ratio of the mixer in the combustion chamber of the internal combustion engine.
  • the thermal efficiency of a heat engine is increased when the compression ratio is high, and in the case of a spark ignition engine, when the ignition timing is advanced to a certain level, the thermal efficiency is increased.
  • the spark ignition engine has a limitation in advancing the ignition timing because abnormal combustion may occur when advancing the ignition timing at a high compression ratio, which may cause engine damage.
  • a typical variable compression ratio (VCR) device is a device that changes the compression ratio of a mixer according to the operating state of the engine.
  • the conventional variable compression ratio device improves fuel efficiency by increasing the compression ratio of the mixer in a low load condition of the engine, and lowers the compression ratio of the mixer in a high load condition of the engine to prevent knocking from occurring.
  • variable compression ratio apparatus has realized a change in the compression ratio by changing the length of the connecting rod connecting the piston and the crankshaft.
  • This type of variable compression ratio device consists of a plurality of links in the portion connecting the piston and the crankshaft so that combustion pressure is transmitted directly to the links. As a result, the durability of the links has become weak.
  • the present invention has been made to solve the above problems, by adjusting the compression ratio of the mixer in the combustion chamber by varying the length of the connecting rod connecting the piston from the crank pin through the eccentric member during the lifting movement of the piston and of the connecting rod It is an object of the present invention to provide a compression ratio variable device capable of adjusting a rotation radius at which a lower end rotates.
  • Compression ratio variable apparatus for achieving the above object is coupled to the crank pin of the crankshaft, the eccentric member is coupled so that the position of the rotation center with respect to the center of rotation of the crank pin, the lower end rotates to the eccentric member
  • a connecting rod capable of being coupled and connected to the piston and the eccentric member and the crank pin or the eccentric member and the connecting rod are selectively coupled to each other to rotate integrally so that the center of rotation of the eccentric member is the center of rotation of the crank pin. It is provided with a control unit for adjusting the rotation radius of the lower end of the connecting rod rotates relative to the center of rotation of the crankshaft.
  • the control unit includes a first clutch for fixing or releasing the eccentric member and the crank pin to each other, a second clutch for fixing or releasing the eccentric member and the connecting rod to each other, and driving the first clutch and the second clutch.
  • the first clutch and the second clutch are installed on the crank pin and the eccentric member, respectively, and generate magnetic force by a power source so that the crank pin and the eccentric member or the eccentric member and the connecting rod are integral with each other. It includes a first and a second magnetic member for magnetically coupling so as to be rotated, the eccentric member is preferably formed to be slidable a predetermined distance along the crank pin.
  • the first clutch is installed on the crank pin and generates a magnetic force by power supply, and is installed on the crank pin so as to slid along the longitudinal direction of the crank pin, the drive according to the driving of the first magnetic member
  • the second clutch is installed on the eccentric member and generates a magnetic force by power supply, and along the longitudinal direction of the eccentric member
  • a second spline member installed on the eccentric member to be slidable, the second spline member being in contact with or separated from the second magnetic member according to the driving of the second magnetic member, wherein the eccentric member and the connecting rod are respectively the first and second members.
  • the eccentric member is installed on the crank pin so as to slide a predetermined distance along the longitudinal direction of the crank pin
  • the control unit is a first protruding key protruding from the crank pin and the first formed on the eccentric member 2, a magnetic member installed on one side of the protruding key and the crank pin to pull the eccentric member to one side of the crank pin, and an elastic member installed between the magnetic member and the eccentric member to elastically bias the eccentric member in the other direction of the crank pin.
  • the protruding key is the first protruding key is separated from the first key groove when the eccentric member is moved to one side, the second protruding key is coupled to the second key groove, the eccentric member to the other side If the copper may be formed such that the second projecting key is a separate and a first key protrusion at the second keyway engaged with the first key groove.
  • the compression ratio variable device is preferably further provided with a sensor for detecting the eccentric direction of the eccentric member with respect to the crank pin.
  • the compression ratio variable apparatus can adjust the distance of the stroke driven by the piston up and down by increasing the top dead center of the piston and lowering the bottom dead center, so that the output of the engine can be more easily and widely controlled.
  • FIG. 1 is a partial perspective view showing an internal drive of an internal combustion engine including a variable compression ratio apparatus according to the present invention
  • FIG. 2 is a perspective view showing a first embodiment of the compression ratio variable device of FIG.
  • Figure 3 is a front view showing a state in which the eccentric member is coupled to the crank pin
  • Figure 4 is a front view showing a state in which the eccentric member is coupled to the connecting rod
  • FIG. 5 is a view showing a comparison of the height change of the top dead center according to the rotation of the eccentric member
  • FIG. 6 is a schematic view showing a radius of rotation of the connecting rod at the position of the eccentric member in the state (a) of FIG.
  • FIG. 7 is a schematic view showing a radius of rotation of the connecting rod at the position of the eccentric member in the state of FIG.
  • FIG. 8 is an exploded perspective view showing a second embodiment of a compression ratio variable device of the present invention.
  • FIG. 9 is a cross-sectional view showing a state in which the eccentric member is connected to the crank pin in the embodiment of FIG.
  • FIG. 10 is a cross-sectional view showing a state in which the eccentric member is connected to the connecting rod in the embodiment of FIG. 8;
  • FIG. 11 is a cross-sectional view showing a state in which an eccentric member is connected to a crank pin in a third embodiment of a compression ratio variable device of the present invention
  • FIG. 12 is a cross-sectional view showing a state in which the eccentric member is connected to the connecting rod in the embodiment of FIG.
  • FIG. 13 is a partial perspective view showing a fourth embodiment of a compression ratio variable device
  • FIG. 14 is a front view of FIG. 13.
  • the compression ratio variable apparatus 100 of the present invention adjusts the positions of the top dead center and the bottom dead center of the piston 10 installed in the internal combustion engine to control the fuel by the rise of the piston 10 in the combustion chamber. This is to adjust the compression ratio of air.
  • the piston 10 is connected to the crankshaft 20 by the connecting rod 120, the crank arm 21 is provided between the crankshaft 20, the crank arm 21 is The crank pin 22 is connected to the connecting rod 120 is installed.
  • crankshaft 20 One end of the crankshaft 20 is provided with a rotary joint (not shown) for supplying power through the crankshaft 20, and the crankshaft 20, the crank arm 21 and the crank pin 22 are It is formed to be able to supply power to the control unit 130 to be described later.
  • the compression ratio variable apparatus 100 includes an eccentric member 110 installed on the crank pin 22, a connecting rod connecting the eccentric member 110 and the piston 10 ( 120 and the control unit 130 to control the connection between the eccentric member 110 and the crank pin 22 and the connecting rod 120.
  • the connecting rod 120 is directly connected to the crank pin 22, but in the present invention, the eccentric member 110 is installed between the crank pin 22 and the connecting rod 120.
  • the eccentric member 110 is a cylindrical member surrounding the crank pin 22, the center of rotation (C2) of the eccentric member 110 is formed so as to be spaced apart from the rotation center (C1) of the crank pin 22 by a predetermined distance. have.
  • the eccentric member 110 is rotatably formed with respect to the crank pin 22 so that the center of rotation C2 of the eccentric member 110 is lower, upper, or side with respect to the center of rotation C1 of the crank pin 22. It can be located at.
  • the connecting rod 120 is coupled to surround the eccentric member 110, and the lower end is coupled to the eccentric member 110, and the upper end is coupled to the piston 10 to crank shaft kinetic energy according to the lifting and lowering of the piston 10 Connect with (20).
  • the connecting rod 120 connects the upper connecting portion 121 to connect with the piston 10, the lower connecting portion 123 and the upper connecting portion 121 and the lower connecting portion 123 to be coupled to the eccentric member 110.
  • the rod 122 is provided, and the upper connection part 121 is rotatably coupled to the piston 10 because the fastening pin 11 penetrating the piston 10 is passed therethrough, and the lower connection part 123 is provided.
  • the lower connection portion 123 is divided into a lower portion and an upper portion like the conventional connecting rod 120, so that the two divided members are positioned to surround the eccentric member 110, and then fastened to each other through the fixing screw 124. Combine with (110).
  • the adjusting unit 130 couples or disconnects the connecting rod 120, the eccentric member 110, and the crank pin 22 to each other during the reciprocating motion of the piston 10. Is rotated about the eccentric member 110 or rotated about the crank pin 22, the first clutch for coupling or separating the crank pin 22 and the eccentric member 110, and the eccentric member 110 And a second clutch for engaging or separating the connecting rod 120.
  • the first clutch includes a first magnetic member 131 formed on the crank pin 22, and the second clutch is a second magnetic member 132 formed on the eccentric member 110.
  • the eccentric member 110 and the connecting rod 120 have one side so as to be magnetically coupled when power is applied to the first magnetic member 131 or the second magnetic member 132 to generate magnetic force.
  • the magnet is attached to or molded into a material containing a magnetic material.
  • the first magnetic member 131 and the second magnetic member 132 generate magnetic force through power supplied through the crank shaft 20, the crank arm 21, and the crank pin 22.
  • the first magnetic member 131 is driven so that the eccentric member 110 is coupled with the first magnetic member 131 so that the eccentric member 110 and the crank pin 22 are integrally formed.
  • the second magnetic member 132 and the connecting rod 120 may be coupled to each other, and the crank pin 22 and the eccentric member 110 may be disengaged so that the eccentric member 110 may be rotated. It may be constrained to rotate about 22).
  • the driving control of the first magnetic member 131 and the second magnetic member 132 is carried out by a controller, which controls the crank pin 22 or the eccentric member to detect the eccentric position of the eccentric member 110. Check the eccentric position of the eccentric member 110 through a sensor installed in the 110 to drive the first magnetic member 131 and the second magnetic member 132 to rotate to the set position. To control.
  • the eccentric member 110 is a second magnetic member ( 132 is integrated with the connecting rod 120 and rotates between the eccentric member 110 and the crank pin 22 when the crankshaft 20 rotates with respect to the upward and downward reciprocating motion of the piston 10. This is done.
  • the eccentric member 110 when power is applied to the first magnetic member 131 and the driving of the second magnetic member 132 is stopped, the eccentric member 110 is coupled to the first magnetic member 131 and the eccentric member 110 is cranked. It behaves integrally with the pin 22 and slips between the connecting rod 120 and the eccentric member 110.
  • adjustment unit 130 can change the position of the center of rotation of the eccentric member 110 with respect to the center of rotation of the crank pin (22).
  • FIG 5 (a) is a state in which the center of rotation (C2) of the eccentric member 110 is located below the center of rotation (C1) of the crank pin 22 when the piston 10 is located at the top dead center
  • (b ) Shows a state in which the rotation center C2 of the eccentric member 110 is located above the center of rotation C1 of the crank pin 22 when the piston 10 is located at the top dead center.
  • the top dead center of the piston is located on the upper side, thereby increasing the compression ratio of fuel and air in the combustion chamber.
  • the size of the rotation radius of the end of the connecting rod 120 is also changed.
  • the eccentric member 110 is integrally rotated with the crank pin 22 so that slip occurs between the connecting rod 120 and the eccentric member 110, and thus, the connecting rod ( The center point at which the 120 rotates becomes the center of rotation C2 of the eccentric member 110.
  • the control unit 130 allows the eccentric member 110 to be selectively coupled with the crank pin 22 or the connecting rod 120 so that the eccentric member 110 is provided.
  • the eccentric position of the crank pin 22 By changing the eccentric position of the crank pin 22 to adjust the length of the extension from the end of the piston 10, as well as the size of the rotation radius of the connecting rod 120 rotates.
  • FIG. 8 to 10 show a second embodiment of the compression ratio variable apparatus 100. As shown in FIG.
  • Compression ratio variable device 100 of the present embodiment is the first and second magnetic members 148 and 149, the crank pin 22 and the eccentric control unit 140 is formed on the crank pin 22 and the eccentric member 110, respectively
  • the first and second spline members 141 and 142 are installed in the member 110 to be able to travel a predetermined distance along the longitudinal direction.
  • the first and second spline members 141 and 142 are provided at one side with a coupling part 143 having a predetermined area so as to be magnetically coupled with the first and second magnetic members 148 and 149, and from the coupling part 143.
  • Each of the crank pin 22 and the eccentric member 110 is formed of an insertion portion 144 extending in a cylindrical shape surrounding the outer circumferential surface.
  • Splines are formed on the outer circumferential surface of the insertion portion 144, and protrusions 145 protruding inward are formed on the inner circumferential surface, respectively.
  • sliding grooves 146 extending along the longitudinal direction and into which the protrusions 145 are inserted are formed so that the first and second spline members 141 and 142 are formed. Is constrained so as to be integrally rotated to the crank pin 22 and the eccentric member 110, respectively, and is only sliding along the longitudinal direction.
  • the spline groove 147 is formed on the inner circumferential surface of the eccentric member 110 and the connecting rod 120 so that the splines of the first and second spline members 141 and 142 can be inserted and fastened, respectively.
  • the adjustment unit 140 of the present embodiment has the second spline member 142 when the second magnetic member is driven and the driving of the first magnetic member 148 is released. ) Is coupled to the second magnetic member 149 and separated from the connecting rod 120 so that the connecting rod 120 is rotated about the eccentric member 110, where the first spline member 141 is eccentric. Is inserted into the spline groove 147 of the member 110 is coupled to the eccentric member 110 to be integrated with the crank pin 22.
  • the second spline member 142 is inserted into the spline groove 147 of the connecting rod 120 to be fastened.
  • the first spline member 141 is configured to be rotated about the crank pin 22 while the eccentric member 110 moves integrally with the connecting rod 120 by being separated from the eccentric member 110.
  • the eccentric member 110 or the connecting member is formed by rotating centrifugal force, respectively.
  • the spline groove (141, 142) by pulling the first and second spline members 141 and 142 to the eccentric member 110 and the connecting rod 120, respectively, 147 may be further provided with a separate magnetic member 153 to enter.
  • 11 and 12 illustrate a third embodiment of the compression ratio variable device 100.
  • Compression ratio variable device 100 of the present embodiment the first and second protruding keys (151, 152) and the crank pin 22, the control unit 150 is formed to protrude to the crank pin 22 and the eccentric member 110, respectively It consists of a magnetic member 153 is installed on the crank arm 21 is connected to one side of the, and the elastic member 154 is installed between the magnetic member 153 and the eccentric member 110.
  • crank pin 22 and the eccentric member 110 are formed to protrude outward from the outer circumferential surface of the first and second protruding keys 151 and 152, respectively, and one side of the eccentric member 110 and the connecting rod ( First and second key grooves 155 and 156 corresponding to the first and second protruding keys 151 and 152 are formed on the other side of the 120, respectively.
  • the first protruding key 151 is inserted into the first key groove 155, and when the eccentric member 110 is moved to the other side, the second protruding key 152 is moved to the second side.
  • the first protruding key 151 is inserted into the key groove 156 so as to be separated from the first key groove 155.
  • the magnetic member 153 pulls and transfers the eccentric member 110 to the other side.
  • the eccentric member 110 moves to the other side as described above.
  • the 151 is separated from the first key groove 155 and the second protruding key 152 is inserted into the second key groove 156 so that the eccentric member 110 is integrally rotated with the connecting rod 120. Therefore, in this state, the connecting rod 120 is rotated about the center of rotation of the crank pin 22, so that the eccentric position of the eccentric member 110 can be adjusted.
  • the elastic member 154 elastically biases the eccentric member 110 to one side. Accordingly, the second protruding key 152 is separated from the second key groove 156. As the first protruding key 151 is inserted into the first key groove 155, the eccentric member 110 is rotated integrally with the crank pin 22. Therefore, in this state, the connecting rod 120 is rotated about the center of rotation of the eccentric member 110, and in the driving state of the piston 10 and the connecting rod 120 usually maintains such a connection form.
  • FIG. 13 and 14 illustrate a fourth embodiment of the compression ratio variable apparatus 100.
  • Compression ratio variable device 100 of the present embodiment is the control unit 160 is the driven gear 161 is formed on one side outer peripheral surface of the eccentric member 110, and the control motor 162 is installed on the crank arm (21) and , And is provided with a drive gear 163 which is installed in the control motor 162 and meshes with the driven gear 161.
  • control gear 162 and the drive gear 163 installed on the control motor 162 is fixed to the crank arm 21 to rotate integrally with the crank pin 22, driven gear portion formed in the eccentric member 110 Since the 161 is engaged with the drive gear 163, the eccentric member 110 is rotated integrally with the crank pin 22.
  • the driving gear 163 is rotated through the control motor 162 to rotate the eccentric member 110 through the driven gear 161.
  • the compression ratio variable device 100 of the second to fourth embodiments also selectively adjusts the eccentric member 110 to be integral with the connecting rod 120 or the crank pin 22 through the adjusting units 140, 150 and 160. By changing the eccentric position of the) through this can adjust the length from the crank pin 22 to the upper end of the piston 10, and further it is possible to adjust the rotation radius of the connecting rod 120 rotates.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

La présente invention porte sur un appareil pour modifier un taux de compression d'un gaz mixte dans une chambre de combustion d'un moteur à combustion interne. L'appareil pour modifier le taux de compression selon la présente invention comprend : un élément excentrique couplé à un maneton de telle sorte que le centre de rotation de l'élément excentrique est excentrique par rapport au centre de rotation du maneton ; une bielle dont une extrémité inférieure est couplée de façon rotative à l'élément excentrique, la bielle étant reliée à un piston ; et une unité de réglage reliée sélectivement de telle sorte que l'élément excentrique et le maneton, ou l'élément excentrique et la bielle, sont tournés comme un seul bloc l'un par rapport à l'autre pour déplacer le centre de rotation de l'élément excentrique par rapport au centre de rotation du maneton, réglant ainsi le rayon de rotation avec lequel l'extrémité inférieure de la bielle tourne par rapport au centre de rotation du vilebrequin.
PCT/KR2013/001120 2012-02-14 2013-02-13 Appareil pour modifier un taux de compression WO2013122380A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2012-0014970 2012-02-14
KR20120014970 2012-02-14
KR10-2012-0075130 2012-07-10
KR1020120075130A KR101354163B1 (ko) 2012-02-14 2012-07-10 압축비 가변장치

Publications (1)

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WO2013122380A1 true WO2013122380A1 (fr) 2013-08-22

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PCT/KR2013/001120 WO2013122380A1 (fr) 2012-02-14 2013-02-13 Appareil pour modifier un taux de compression

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WO (1) WO2013122380A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105221259A (zh) * 2015-07-08 2016-01-06 刘丕财 离心式组合曲轴节能发动机
CN112461098A (zh) * 2020-10-19 2021-03-09 中能（天津）智能传动设备有限公司 一种曲柄轴偏心轴径一致性生产现场的检测方法
US20220136431A1 (en) * 2019-07-28 2022-05-05 Almir Gonçalves Pereira Variable compression ratio device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007009834A (ja) * 2005-07-01 2007-01-18 Kayseven Co Ltd ストローク可変往復動シリンダ装置
JP2009041507A (ja) * 2007-08-10 2009-02-26 Nissan Motor Co Ltd 内燃機関
KR20100122532A (ko) * 2009-05-13 2010-11-23 이수봉 크랭크축의 기어열에 의한 가변압축비 장치
KR20110001511A (ko) * 2009-06-30 2011-01-06 현대자동차주식회사 가변 압축비 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007009834A (ja) * 2005-07-01 2007-01-18 Kayseven Co Ltd ストローク可変往復動シリンダ装置
JP2009041507A (ja) * 2007-08-10 2009-02-26 Nissan Motor Co Ltd 内燃機関
KR20100122532A (ko) * 2009-05-13 2010-11-23 이수봉 크랭크축의 기어열에 의한 가변압축비 장치
KR20110001511A (ko) * 2009-06-30 2011-01-06 현대자동차주식회사 가변 압축비 장치

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105221259A (zh) * 2015-07-08 2016-01-06 刘丕财 离心式组合曲轴节能发动机
US20220136431A1 (en) * 2019-07-28 2022-05-05 Almir Gonçalves Pereira Variable compression ratio device
US11879400B2 (en) * 2019-07-28 2024-01-23 Almir Gonçalves Pereira Variable compression ratio device
CN112461098A (zh) * 2020-10-19 2021-03-09 中能（天津）智能传动设备有限公司 一种曲柄轴偏心轴径一致性生产现场的检测方法

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