JP2009270563A - 連続可変バルブリフト装置 - Google Patents
連続可変バルブリフト装置 Download PDFInfo
- Publication number
- JP2009270563A JP2009270563A JP2008290146A JP2008290146A JP2009270563A JP 2009270563 A JP2009270563 A JP 2009270563A JP 2008290146 A JP2008290146 A JP 2008290146A JP 2008290146 A JP2008290146 A JP 2008290146A JP 2009270563 A JP2009270563 A JP 2009270563A
- Authority
- JP
- Japan
- Prior art keywords
- camshaft
- valve lift
- variable valve
- continuously variable
- cam
- 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.)
- Pending
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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
-
- 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
- F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L13/0042—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams being profiled in axial and radial direction
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
-
- 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
- F01L2013/0078—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 cam contact point by axially displacing the camshaft
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
【解決手段】a)入力部、b)入力部の回転力が伝達されて、長さ方向に相対的位置変動が可能に連結されたカムシャフト、c)カムシャフトの相対的位置を調節する調節部、d)カムシャフトの長さ方向に、断面積が徐々に変わるように側面が傾き、かつ断面が歪んだ形状の傾斜カム、e)傾斜カムの回転により往復運動する媒介部、f)媒介部の往復運動によって開閉されるバルブ開閉部、を含んで構成される。
【選択図】図1
Description
図1は、本発明の実施の形態による連続可変バルブリフト装置の構成を概略的に示した斜視図であり、図2はその部分断面図であり、図3は連続可変バルブリフト装置の各構成を概略的に示した図面である。
傾斜カム210の歪んだ断面形状により、傾斜カム210と接する傾斜部422が上下に往復運動し、ロッカーレバー420がロッカーシャフト410を中心にピボット運動するようになる。
図4は、連続可変バルブリフト装置のローリフトモードでの作動を、図5は、ハイリフトモードでの作動を示している。
エンジンの要求負荷が小さくなってローリフトモードになると、図4に示すように、偏心カム310が回転して、カムシャフト200の位置がカムシャフトスプロケット110から相対的に遠くなる。そうすると、傾斜カム210と傾斜部422のカムシャフト200に対する傾きと、偏心カム310が偏心する大きさとによって、バルブ510の開閉量と開閉時間が相対的に短くなる。つまり、図2に示したゼロリフト区間428とバルブ開閉部500の接触する時間が長くなる。
また、出力部424の形状の設計によっては、可変気筒装置(CDA;Cylinder Deactivation)モードの運転も可能である。
110;カムシャフトスプロケット
120;フロントジャーナル
125;フロントジャーナル結合部
130;弾性部
200;カムシャフト
205;カムシャフト結合部
210;傾斜カム
300;調節部
310;偏心カム
400;媒介部
410;ロッカーシャフト
420;ロッカーレバー
422;傾斜部
424;出力部
426;リフト区間
428;ゼロリフト区間
500;バルブ開閉部
510;バルブ
Claims (7)
- a)入力部、
b)前記入力部の回転力が伝達されて、長さ方向に相対的位置変動が可能に連結されたカムシャフト、
c)前記カムシャフトの相対的位置を調節する調節部、
d)前記カムシャフトの長さ方向に、断面積が徐々に変わるように側面が傾き、かつ断面が歪んだ形状の傾斜カム、
e)前記傾斜カムの回転により往復運動する媒介部、
f)前記媒介部の往復運動によって開閉されるバルブ開閉部、を含んで構成されることを特徴とする連続可変バルブリフト装置。 - 前記入力部は、フロントジャーナルを有して、前記カムシャフトに回転力を伝達するとともに、前記カムシャフトを長さ方向に相対的位置変動可能に連結することを特徴とする請求項1に記載の連続可変バルブリフト装置。
- 前記フロントジャーナルには、前記カムシャフトを外に押し出す方向に力を与える弾性部が形成されていることを特徴とする請求項2に記載の連続可変バルブリフト装置。
- 前記調節部は、前記カムシャフトの前記入力部と反対側端部と接触する偏心カムを有して、前記偏心カムの回転により前記カムシャフトの長さ方向相対的位置を調節することを特徴とする請求項1に記載の連続可変バルブリフト装置。
- 前記媒介部は、前記カムシャフトと平行に形成されたロッカーシャフトと、前記ロッカーシャフトに形成されたロッカーレバーを有し、前記ロッカーシャフトを中心に前記ロッカーレバーがピボット運動することを特徴とする請求項1に記載の連続可変バルブリフト装置。
- 前記ロッカーレバーは、前記傾斜カムと接触する傾斜部と、前記バルブ開閉部と接触する出力部とを有して構成されることを特徴とする請求項5に記載の連続可変バルブリフト装置。
- 前記出力部は、前記ロッカーレバーのピボット運動により前記バルブ開閉部のバルブリフトが発生するリフト区間と、バルブリフトが発生しないゼロリフト区間とを有することを特徴とする請求項6に記載の連続可変バルブリフト装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080040846A KR20090114947A (ko) | 2008-04-30 | 2008-04-30 | 연속 가변 밸브 리프트 장치 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2009270563A true JP2009270563A (ja) | 2009-11-19 |
Family
ID=41131097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008290146A Pending JP2009270563A (ja) | 2008-04-30 | 2008-11-12 | 連続可変バルブリフト装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090272346A1 (ja) |
JP (1) | JP2009270563A (ja) |
KR (1) | KR20090114947A (ja) |
CN (1) | CN101571062B (ja) |
DE (1) | DE102008063337A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8776739B2 (en) | 2010-10-08 | 2014-07-15 | Pinnacle Engines, Inc. | Internal combustion engine valve actuation and adjustable lift and timing |
CN103228877A (zh) * | 2010-10-08 | 2013-07-31 | 品纳科动力有限公司 | 内燃机阀门驱动和可调节的升程及定时 |
CN102182529A (zh) * | 2011-05-24 | 2011-09-14 | 奇瑞汽车股份有限公司 | 一种可变升程凸轮轴 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63253107A (ja) * | 1987-04-06 | 1988-10-20 | Tatsuya Nakazawa | 内燃機関の吸・排気弁リフトタイミング可変装置 |
JP2007046459A (ja) * | 2005-08-05 | 2007-02-22 | Otics Corp | 可変動弁機構 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3025259A1 (de) * | 1973-05-18 | 1981-01-15 | Nissan Motor | Ventilbetaetigungsmechanismus |
US4494506A (en) * | 1982-02-03 | 1985-01-22 | Mazda Motor Corporation | Intake system for an internal combustion engine |
US5367991A (en) * | 1993-03-23 | 1994-11-29 | Mazda Motor Corporation | Valve operating system of engine |
US5445117A (en) * | 1994-01-31 | 1995-08-29 | Mendler; Charles | Adjustable valve system for a multi-valve internal combustion engine |
JP3275761B2 (ja) * | 1996-05-13 | 2002-04-22 | トヨタ自動車株式会社 | 内燃機関の動弁装置 |
US6298813B1 (en) * | 1999-10-08 | 2001-10-09 | Toyota Jidosha Kabushiki Kaisha | Variable valve apparatus of internal combustion engine |
JP3992000B2 (ja) * | 2004-02-19 | 2007-10-17 | 日産自動車株式会社 | 内燃機関の吸排気バルブ温度推定装置及びバルブクリアランス量推定装置 |
CN1814992A (zh) * | 2006-03-10 | 2006-08-09 | 王雪松 | 连续可变气门正时配气机构活塞式内燃机 |
CN100410502C (zh) * | 2006-04-14 | 2008-08-13 | 江门市硕普科技开发有限公司 | 一种发动机自适应气门相位装置 |
CN1851242A (zh) * | 2006-04-14 | 2006-10-25 | 江门市硕普科技开发有限公司 | 一种发动机连续可变气门相位驱动装置 |
-
2008
- 2008-04-30 KR KR1020080040846A patent/KR20090114947A/ko not_active Application Discontinuation
- 2008-11-12 JP JP2008290146A patent/JP2009270563A/ja active Pending
- 2008-11-26 US US12/324,549 patent/US20090272346A1/en not_active Abandoned
- 2008-12-24 CN CN2008101894449A patent/CN101571062B/zh not_active Expired - Fee Related
- 2008-12-30 DE DE102008063337A patent/DE102008063337A1/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63253107A (ja) * | 1987-04-06 | 1988-10-20 | Tatsuya Nakazawa | 内燃機関の吸・排気弁リフトタイミング可変装置 |
JP2007046459A (ja) * | 2005-08-05 | 2007-02-22 | Otics Corp | 可変動弁機構 |
Also Published As
Publication number | Publication date |
---|---|
US20090272346A1 (en) | 2009-11-05 |
KR20090114947A (ko) | 2009-11-04 |
DE102008063337A1 (de) | 2009-11-05 |
CN101571062B (zh) | 2013-06-05 |
CN101571062A (zh) | 2009-11-04 |
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