US20110271921A1 - Engine that is equipped with continuous variable valve lift system - Google Patents

Engine that is equipped with continuous variable valve lift system Download PDF

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Publication number
US20110271921A1
US20110271921A1 US12/938,664 US93866410A US2011271921A1 US 20110271921 A1 US20110271921 A1 US 20110271921A1 US 93866410 A US93866410 A US 93866410A US 2011271921 A1 US2011271921 A1 US 2011271921A1
Authority
US
United States
Prior art keywords
drum shaft
camshaft
control
cam
shaft
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.)
Abandoned
Application number
US12/938,664
Other languages
English (en)
Inventor
Gyu Wan Kim
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.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors Corp
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 Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Assigned to HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION reassignment HYUNDAI MOTOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, GYU WAN
Publication of US20110271921A1 publication Critical patent/US20110271921A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
    • F01L13/0026—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio by means of an eccentric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries

Definitions

  • the present invention relates to an engine having a continuously variable valve lift system. More particularly, the present invention relates to an engine having a continuously variable valve lift system that continuously varies lift of a valve disposed at an intake port through which intake air is supplied to a combustion chamber.
  • VVL variable valve lift
  • variable valve lift apparatus is necessary to securely fix a camshaft, a control shaft, and a drum shaft in a valve operating process using torque of the camshaft.
  • Various aspects of the present invention are directed to provide an engine having a continuously variable valve lift system having advantages of securely supporting a camshaft, a control shaft, and a drum shaft so as to variably control a valve.
  • the engine having a continuously variable valve lift system may include a camshaft having an input cam formed at one side thereof, wherein the camshaft may be mounted on a cylinder head, a drum shaft that may be disposed with a predetermined distance from the camshaft, wherein a swing arm may be rotatably mounted at one side thereof, a control shaft that may be disposed with a predetermined distance from the drum shaft, wherein a control cam that varies a position of the drum shaft may be formed thereto, an output cam that may be rotatably mounted on the camshaft and may be connected to and moved by the swing arm, such that the output cam variably lifts a valve mounted in the cylinder head according to a position of the drum shaft, a first cap, of which a lower portion thereof may be fixed on an upper portion of the cylinder head, and including a first semicircular portion sliding with an exterior circumference of the camshaft formed at one side of a lower part thereof, and a second semicircular portion sliding with
  • the engine may further may include an input link connecting one end of the swing arm to the input cam eccentrically so as to rotate the swing arm on the drum shaft by the input cam, an output link connecting the other end of the swing arm to the output cam so as to rotate the output link on the camshaft, and a control link eccentrically connecting the control cam of the control shaft with the drum shaft so as to vary a position of the drum shaft disposed in the guide slot.
  • the engine may further include a guide drum that may be fixed on the drum shaft and moves along the guide slot.
  • a straight line connecting a rotation center of the drum shaft and a rotation center of the control shaft may have an ascent angle ranging from approximately 10 to approximately 30 degrees in a central direction of the cylinder head, wherein the camshaft may be disposed at a predetermined distance from the drum shaft in a lower direction of the drum shaft.
  • a first oil passage may be formed along a central line of the control shaft, a second oil passage may be diverged from the first oil passage and may be formed along the control cam, the control link, and the drum shaft, and a third oil passage may be formed along a central line of the drum shaft to lubricate sliding surface between the drum shaft and the swing arm.
  • a first cap may be fixed on a cylinder head
  • a second cap may be fixed on the first cap
  • a control shaft may be interposed between the first cap and the second cap
  • a camshaft may be interposed between the first cap and the cylinder head
  • a drum shaft penetrates the second cap, such that each constitute elements may be securely fixed.
  • FIG. 1 is a partial perspective view of an engine having a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • FIG. 2 is a first partial cross-sectional view of an engine having a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • FIG. 3 is a second partial cross-sectional view of an engine having a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • FIG. 4 is a partial perspective view of a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • FIG. 5 is a partial exploded perspective view of a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • FIG. 6 is a partial exploded side-view of a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • FIG. 1 is a partial perspective view of an engine having a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • an engine having a continuously variable valve lift system includes a camshaft 105 , an output cam 150 , an input cam 130 , an input link 135 , a first cap 120 , a guide drum 117 , a worm wheel 114 , a drum shaft 115 , a control link 210 , a second cap 125 , a swing arm 140 , a control cam 112 , a control shaft 110 , a cylinder head 100 , and an output link 145 .
  • the camshaft 105 , the control shaft 110 , and the drum shaft 115 are disposed to be parallel to each other with a predetermined distance therebetween, a tappet 310 is disposed at a lower portion of the camshaft corresponding to the output cam 150 , and a valve 300 is disposed at a lower portion of the tappet 310 .
  • the input cam 130 is formed at one side of the camshaft 105 , and the input cam 130 has a circular section and is eccentric from a rotation center of the camshaft.
  • the swing arm 140 is disposed at one side of the drum shaft 115 , and the input link 135 connects one end of the swing arm 140 with the input cam 130 .
  • the input link 135 pulls or pushes out one end of the swing arm 140 by the input cam 130 such that the swing arm 140 rotates on the drum shaft 115 .
  • the control cam 112 is formed at one side of the control shaft 110 , and the control link 210 connects the control cam 112 and the drum shaft 115 . In this case, if the control shaft 110 rotates, the control link 210 pulls or pushes the drum shaft 115 such that the position of the drum shaft 115 is changed.
  • the guide drum 117 is disposed at one side of the drum shaft 115 , and the drum shaft 115 rotatably penetrates the guide drum 117 .
  • the guide drum 117 moves along a guide slot 127 of the second cap 125 .
  • control link 210 pushes or pulls the drum shaft 115 , the guide drum moves along the guide slot 127 of the second cap 125 to change the position of the drum shaft 115 .
  • the worm wheel 114 is disposed at one end portion of the control shaft 110 , a worm gear is engaged with the worm wheel 114 , and the worm gear is rotated by a motor.
  • a control portion controls the motor depending on the driving condition of the engine to rotate the control shaft.
  • the output cam 150 is disposed near the input cam 130 on the camshaft 105 .
  • the camshaft 105 rotatably penetrates the output cam 150 .
  • the output link 145 connects one side of the output cam 150 with the other end of the swing arm 140 through a link member, and if the swing arm 140 rotates with a predetermined angle on the drum shaft 115 , the output link 145 pushes or pulls one side of the output cam 150 such that the output cam 150 rotates on the camshaft 105 by a predetermined angle.
  • the position of the drum shaft 115 is varied according to rotation of the control shaft 110 in an exemplary embodiment of the present invention, and the geometry through which the swing arm 140 moves the output cam 150 is changed such that the lift amount of the valve 300 is continuously varied.
  • FIG. 2 is a first partial cross-sectional view of an engine having a continuously variable valve lift system according to an exemplary embodiment of the present invention
  • FIG. 3 is a second partial cross-sectional view of an engine having a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • the camshaft 105 is disposed on the cylinder head 100
  • the first cap 120 is disposed to fix the camshaft 105
  • the control shaft 110 is disposed at a right upper portion of the first cap 120
  • the drum shaft 115 is disposed at a left upper portion of the first cap 120 .
  • the second cap is fixed on the first cap.
  • a main gallery 200 is formed in the cylinder head 100 at a lower side of the control shaft 110 such that oil flows in a length direction of the control shaft 110 .
  • oil is supplied through the main gallery 200 with a predetermined pressure.
  • a first oil passage 230 is formed along a central line of the control shaft 110
  • a second oil passage 212 is diverged from the first oil passage 230 and is formed along the control cam 112 , the control link 210 k, and the drum shaft 115
  • a third oil passage 220 is formed along a central line of the drum shaft 115 .
  • a first ring 280 is formed at one end portion of the input link 135
  • a second ring 282 is formed at the other end portion thereof.
  • the input cam 130 is inserted through the first ring 280
  • a pin formed at one end portion of the swing arm 140 is inserted through the second ring 282 . Accordingly, if the camshaft 105 rotates, the input cam 130 pulls or pushes one end portion of the swing arm 140 through the input link 135 .
  • a third ring 284 is formed at one end portion of the control link 210
  • a fourth ring 286 is formed at the other end portion thereof.
  • the control cam 112 is inserted through the third ring 284
  • the drum shaft 115 is inserted through the fourth ring 286 . Accordingly, if the control shaft 110 rotates, the control cam 112 pulls or pushes the drum shaft 115 through the control link 210 .
  • the drum shaft 115 penetrates the swing arm 140 , and the swing arm 140 slides on an exterior circumference of the drum shaft 115 to rotate on the drum shaft.
  • oil supplied to the third oil passage 220 of the drum shaft 115 flows in an oil passage formed in the drum shaft 115 to effectively lubricate the sliding surface between the drum shaft 115 and the swing arm 140 .
  • FIG. 1 and FIG. 2 structure and oil passages of a continuously variable valve lift system disposed at the right bank corresponding to the right camshaft 105 are explained, and since the structure of the left bank corresponding to the left camshaft is similar or identical to that of the right bank side, the detailed description thereof is omitted in an exemplary embodiment of the present invention.
  • a straight line passing through a rotation center of the control shaft 110 and a rotation center of the drum shaft 115 is lowered in a central direction of a cylinder head.
  • the descent angle of the straight line can range from 10 to 30 degrees in another exemplary embodiment of the present invention.
  • FIG. 4 is a partial perspective view of a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • the first cap 120 is mounted on the cylinder head 100
  • the second cap 125 is mounted on the first cap 120 .
  • a fixing bolt 520 sequentially penetrates the second cap 125 and the first cap 120 to be fixed to the cylinder head 100 such that the first cap 120 and the second cap 125 are secured to the cylinder head 100 .
  • FIG. 5 is a partial exploded perspective view of a continuously variable valve lift system according to an exemplary embodiment of the present invention
  • FIG. 6 is a partial exploded side-view of a continuously variable valve lift system according to an exemplary embodiment of the present invention.
  • a first semi-circular groove 510 is formed outside the cylinder head 100 at a lower portion of the first cap 120
  • a second semi-circular groove 500 is formed inside the cylinder head 100 at an upper portion of the first cap 120 .
  • a third semi-circular groove 505 is formed at a part corresponding to the second semi-circular groove 500 of the first cap 120 at a lower portion of the second cap 125 .
  • Another semi-circular groove is formed at an upper portion of the cylinder head 100 corresponding to the first semi-circular groove 510 , and the camshaft 105 is rotatably disposed through a circular penetration hole formed by the first semi-circular groove 510 and the other semi-circular groove formed at the upper portion of the cylinder head 100 .
  • control shaft 110 is rotatably disposed through a circular penetration hole formed by the second semi-circular groove 500 and the third semi-circular groove 505 .
  • the third semi-circular groove 505 is formed at a lower portion of the second cap 125 , and the guide slot 127 is formed at the center of the second cap 125 .
  • the guide slot 127 is extended from the outside to the inside of the cylinder head 100 such that the drum 117 and the drum shaft 115 move inward or outward depending on the rotational position of the control shaft 110 .
  • the fixing bolts 520 sequentially penetrate the second cap 125 and the first cap 120 , are engaged with the cylinder head 100 to fix the first cap 120 and the second cap 125 , and rotatably support the camshaft 105 , the control shaft 110 , and the drum shaft 115 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US12/938,664 2010-05-06 2010-11-03 Engine that is equipped with continuous variable valve lift system Abandoned US20110271921A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0042401 2010-05-06
KR1020100042401A KR101171906B1 (ko) 2010-05-06 2010-05-06 연속 가변 밸브 리프트 시스템을 구비한 엔진

Publications (1)

Publication Number Publication Date
US20110271921A1 true US20110271921A1 (en) 2011-11-10

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US12/938,664 Abandoned US20110271921A1 (en) 2010-05-06 2010-11-03 Engine that is equipped with continuous variable valve lift system

Country Status (5)

Country Link
US (1) US20110271921A1 (zh)
JP (1) JP5751802B2 (zh)
KR (1) KR101171906B1 (zh)
CN (1) CN102235200B (zh)
DE (1) DE102010060587A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120132159A1 (en) * 2010-11-30 2012-05-31 Kia Motors Corporation Continuous variable valve lift apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10480358B2 (en) * 2015-06-22 2019-11-19 Hyundai Motor Company Continuously variable valve timing apparatus and engine provided with the same
KR101664084B1 (ko) * 2015-12-14 2016-10-10 현대자동차 주식회사 연속 가변 밸브 듀레이션 장치 및 이를 포함하는 엔진
US10202875B2 (en) 2015-12-14 2019-02-12 Hyundai Motor Company Powertrain

Citations (18)

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US5787849A (en) * 1995-11-21 1998-08-04 Mitchell; Stephen W. Valve timing phase changer
US5913292A (en) * 1997-04-23 1999-06-22 Unisia Jecs Corporation Variable valve timing and lift mechanism of internal combustion engine
US6055949A (en) * 1997-12-26 2000-05-02 Nissan Motor Co., Ltd. Variable valve actuator apparatus
US6367436B2 (en) * 2000-02-24 2002-04-09 Delphi Technologies, Inc. Belt-driven variable valve actuating mechanism
US6378474B1 (en) * 1999-06-01 2002-04-30 Delphi Technologies, Inc. Variable value timing mechanism with crank drive
US6382152B2 (en) * 2000-02-23 2002-05-07 Delphi Technologies, Inc. Crank gear variable valve actuating mechanism
US6386161B2 (en) * 2000-01-13 2002-05-14 Delphi Technologies, Inc. Cam link variable valve mechanism
US6390041B2 (en) * 1999-12-21 2002-05-21 Unisia Jecs Corporation Variable-valve-actuation apparatus for internal combustion engine
US6422187B2 (en) * 2000-01-26 2002-07-23 Delphi Technologies, Inc. Variable valve mechanism having an eccentric-driven frame
US6591802B1 (en) * 2002-04-10 2003-07-15 Delphi Technologies, Inc. Variable valve actuating mechanism having a rotary hydraulic lash adjuster
US6694934B1 (en) * 2002-11-22 2004-02-24 Eaton Corporation Variable valve actuator for internal combustion engine
US20040187822A1 (en) * 2003-03-27 2004-09-30 Hitachi Unisia Automotive, Ltd. Valve operating apparatus of internal combustion engines
US7055476B2 (en) * 2003-06-02 2006-06-06 Hitachi, Ltd. Valve actuation apparatus for internal combustion engine
US20080078346A1 (en) * 2006-09-28 2008-04-03 Jongmin Lee System for selectively varying engine valve open duration
US7469668B2 (en) * 2003-06-03 2008-12-30 Honda Motor Co., Ltd. Valve-moving device for engine
US20090031971A1 (en) * 2007-08-01 2009-02-05 Kiyoung Kwon Continuous variable valve lift apparatus
US20090301418A1 (en) * 2008-06-04 2009-12-10 Nissan Motor Co., Ltd. Variable valve system for internal combustion engine
US20110036317A1 (en) * 2009-08-12 2011-02-17 Hyundai Motor Company Continuously variable valve lift device for vehicle

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US9003A (en) * 1852-06-08 Improvement in wheel-cultivators
JP3984321B2 (ja) 1996-10-07 2007-10-03 株式会社日立製作所 Ｖ型内燃機関の吸排気弁駆動制御装置
JP3921290B2 (ja) * 1998-01-22 2007-05-30 株式会社日立製作所 内燃機関の可変動弁装置
JP4858119B2 (ja) 2006-11-27 2012-01-18 日産自動車株式会社 シリンダヘッド構造
KR101317140B1 (ko) * 2007-08-01 2013-10-08 현대자동차주식회사 무단 가변 밸브 리프트 장치
KR101042287B1 (ko) 2008-10-16 2011-06-17 한국과학기술원 원격 제어 모바일 유닛 자동 충전 시스템 및 방법

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5787849A (en) * 1995-11-21 1998-08-04 Mitchell; Stephen W. Valve timing phase changer
US5913292A (en) * 1997-04-23 1999-06-22 Unisia Jecs Corporation Variable valve timing and lift mechanism of internal combustion engine
US6055949A (en) * 1997-12-26 2000-05-02 Nissan Motor Co., Ltd. Variable valve actuator apparatus
US6378474B1 (en) * 1999-06-01 2002-04-30 Delphi Technologies, Inc. Variable value timing mechanism with crank drive
US6390041B2 (en) * 1999-12-21 2002-05-21 Unisia Jecs Corporation Variable-valve-actuation apparatus for internal combustion engine
US6386161B2 (en) * 2000-01-13 2002-05-14 Delphi Technologies, Inc. Cam link variable valve mechanism
US6422187B2 (en) * 2000-01-26 2002-07-23 Delphi Technologies, Inc. Variable valve mechanism having an eccentric-driven frame
US6382152B2 (en) * 2000-02-23 2002-05-07 Delphi Technologies, Inc. Crank gear variable valve actuating mechanism
US6367436B2 (en) * 2000-02-24 2002-04-09 Delphi Technologies, Inc. Belt-driven variable valve actuating mechanism
US6591802B1 (en) * 2002-04-10 2003-07-15 Delphi Technologies, Inc. Variable valve actuating mechanism having a rotary hydraulic lash adjuster
US6694934B1 (en) * 2002-11-22 2004-02-24 Eaton Corporation Variable valve actuator for internal combustion engine
US20040187822A1 (en) * 2003-03-27 2004-09-30 Hitachi Unisia Automotive, Ltd. Valve operating apparatus of internal combustion engines
US7055476B2 (en) * 2003-06-02 2006-06-06 Hitachi, Ltd. Valve actuation apparatus for internal combustion engine
US7469668B2 (en) * 2003-06-03 2008-12-30 Honda Motor Co., Ltd. Valve-moving device for engine
US20080078346A1 (en) * 2006-09-28 2008-04-03 Jongmin Lee System for selectively varying engine valve open duration
US20090031971A1 (en) * 2007-08-01 2009-02-05 Kiyoung Kwon Continuous variable valve lift apparatus
US20090301418A1 (en) * 2008-06-04 2009-12-10 Nissan Motor Co., Ltd. Variable valve system for internal combustion engine
US20110036317A1 (en) * 2009-08-12 2011-02-17 Hyundai Motor Company Continuously variable valve lift device for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120132159A1 (en) * 2010-11-30 2012-05-31 Kia Motors Corporation Continuous variable valve lift apparatus

Also Published As

Publication number Publication date
DE102010060587A1 (de) 2011-11-10
KR101171906B1 (ko) 2012-08-07
CN102235200B (zh) 2015-04-15
KR20110122997A (ko) 2011-11-14
CN102235200A (zh) 2011-11-09
JP5751802B2 (ja) 2015-07-22
JP2011236885A (ja) 2011-11-24

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Legal Events

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AS Assignment

Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, GYU WAN;REEL/FRAME:025242/0001

Effective date: 20101029

Owner name: KIA MOTORS CORPORATION, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, GYU WAN;REEL/FRAME:025242/0001

Effective date: 20101029

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION