JP5398548B2 - 往復動ピストン燃焼エンジンの動弁機構 - Google Patents
往復動ピストン燃焼エンジンの動弁機構 Download PDFInfo
- Publication number
- JP5398548B2 JP5398548B2 JP2009549832A JP2009549832A JP5398548B2 JP 5398548 B2 JP5398548 B2 JP 5398548B2 JP 2009549832 A JP2009549832 A JP 2009549832A JP 2009549832 A JP2009549832 A JP 2009549832A JP 5398548 B2 JP5398548 B2 JP 5398548B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- exhaust valve
- valves
- cam lobe
- engine
- 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.)
- Expired - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000010363 phase shift Effects 0.000 description 3
- 230000002000 scavenging effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Images
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/34413—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using composite camshafts, e.g. with cams being able to move relative to the camshaft
-
- 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
- F01L1/26—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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Gear-Shifting Mechanisms (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
図1に概略的に示した動弁機構を有する四弁エンジンのシリンダにおいては、カムシャフトが、調整部品としての二つの吸気弁1や二つの排気弁2に作用する。即ち、第1カムシャフト3が吸気弁1に作用すると共に、第2カムシャフト4が排気弁2に作用する。それぞれが一対になっている吸気弁1と排気弁2とは、それぞれ、第1の弁と第2の弁とを備えている。即ち、吸気弁1は第1吸気弁1pと第2吸気弁1sとを備え、排気弁2は第1排気弁2pと第2排気弁2sとを備えている。前述した二つのカムシャフト3,4のそれぞれは、互いに相対的に回転可能な(つまり、位相調整可能な)二つのカムローブ、即ち、第1カムローブ5および第2カムローブ6を有している。該カムシャフト3,4のそれぞれは、互いに相対的に回転可能であると共に互いに同軸に配置された二つのシャフト、即ち、内側シャフト7および筒状の外側シャフト8を備える。
各第1カムローブ5は、外側シャフトに接続して固定され、各第2カムローブ6は、内側シャフト7に接続して固定される。内側シャフト7に接続して固定された第2カムローブ6は、外側シャフト8に回転可能に取り付けられると共に、ピン9によって固定された状態で内側シャフト7に接続される。カムシャフト3,4は、例えば、対応する外側シャフト8によって駆動される。この場合、第2カムローブ6は、対応するカムシャフトと同じスピードで回転する第1カムローブ5に対して位相調整可能となっている。
ここでは、比較のために、図1のエンジンシリンダの弁1および2についてのエンジン動作の制御曲線を図2(a)に示すと共に、本発明に係るエンジンブレーキ動作の制御曲線を図2(b)に示す。
図3において、同図(a)には、回転速度が高いときの駆動動作を示すと共に、同図(b)には、回転速度が低いときの本発明の駆動動作を示す。同図(b)に示された第2吸気弁1sに向かう矢印P2の方向へ位相をシフトさせると、第2吸気弁1sが遅れて開くことによって、「吸気」行程(C)における充填動作が改善される。このことによって、低回転速度状態における燃焼が改善される。図3の制御図の構成の目的および名称は、図2に対応している。
図4において、同図(a)には、回転速度が高いときのエンジンの部分負荷運転を示すと共に、同図(b)には、エンジンの全負荷運転を示す。
図5(a)は、エンジンの部分負荷運転を示し、図5(b)は、本発明に係るエンジンの全負荷運転を示す。二つの制御図の違いは、排気弁1,2が位相シフトするように駆動されることにある。第2排気弁2sは、第1排気弁2pより早く開かれている。二つの排気弁の間の位相シフトの方向を矢印「P4」で示す。図5(b)に示す本発明に係る制御曲線に示すように、とりわけ全負荷運転では、排気行程(B)よりも前に第2排気弁2sによる排気を行うことと、第1排気弁2pによる長時間の排気とによって、スカベンジングが改善される。こうして、フレッシュガスの充填を改善できる。このようにして、燃焼が全体的に改善される。
Claims (2)
- カムシャフトのカムローブによって駆動される少なくとも三つの弁がエンジンシリンダごとに設けられ、少なくとも二つの弁が第1及び第2の排気弁として機能の点で同じ動作をする往復動ピストン燃焼エンジンの動弁機構であって、
前記カムシャフトは、前記第1の排気弁を駆動する第1のカムローブと、前記第2の排気弁を駆動すると共に前記第1のカムローブに対して位相調節可能な第2のカムローブとを備え、
前記第1の排気弁だけが該第1の排気弁に対応するエンジンシリンダの排気行程において開き、前記第2の排気弁だけが該第2の排気弁に対応するエンジンシリンダの膨張行程の全期間に亘って開くように前記第1のカムローブと前記第2のカムローブの位相を相違させることによって、エンジンブレーキ動作を実現することを特徴とする動弁機構。 - 各エンジンシリンダの第2の排気弁は、該第2の排気弁に対応するエンジンシリンダの第1の排気弁よりも小さいリフト量で開くカムローブと対応することを特徴とする請求項1に記載の動弁機構。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007007758.2 | 2007-02-16 | ||
DE102007007758A DE102007007758A1 (de) | 2007-02-16 | 2007-02-16 | Ventiltrieb eines Hubkolben-Verbrennungsmotors |
PCT/EP2008/051805 WO2008098991A1 (de) | 2007-02-16 | 2008-02-14 | Ventiltrieb eines hubkolben-verbrennungsmotors |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010518322A JP2010518322A (ja) | 2010-05-27 |
JP5398548B2 true JP5398548B2 (ja) | 2014-01-29 |
Family
ID=39433926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009549832A Expired - Fee Related JP5398548B2 (ja) | 2007-02-16 | 2008-02-14 | 往復動ピストン燃焼エンジンの動弁機構 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9080472B2 (ja) |
EP (1) | EP2118454B1 (ja) |
JP (1) | JP5398548B2 (ja) |
AT (1) | ATE466171T1 (ja) |
DE (2) | DE102007007758A1 (ja) |
WO (1) | WO2008098991A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103180556B (zh) * | 2011-04-15 | 2015-06-10 | 丰田自动车株式会社 | 发动机的控制装置 |
DE102012220543A1 (de) | 2012-11-12 | 2014-05-15 | Schaeffler Technologies Gmbh & Co. Kg | Nockenwellenverstelleinrichtung |
EP2915964A1 (en) | 2014-03-03 | 2015-09-09 | Mechadyne International Limited | Internal combustion engine |
DE102015016526A1 (de) * | 2015-12-19 | 2017-06-22 | Daimler Ag | Verfahren zum Betreiben einer Hubkolben-Verbrennungskraftmaschine |
DE102017201343A1 (de) | 2017-01-27 | 2018-08-02 | Mahle International Gmbh | Ventiltrieb für eine Hubkolbenbrennkraftmaschine und Verfahren zur Ventilsteuerung in einer Hubkolbenbrennkraftmaschine |
CN107023342B (zh) * | 2017-06-07 | 2020-05-19 | 大连理工大学 | 一种变模式气门驱动系统 |
CN107100686B (zh) * | 2017-06-07 | 2020-04-14 | 大连理工大学 | 一种单凸轮轴开关支点式变模式气门驱动系统 |
CN107060941B (zh) * | 2017-06-07 | 2020-05-19 | 大连理工大学 | 一种双凸轮轴开关支点式变模式气门驱动系统 |
DE102019113746A1 (de) * | 2019-05-23 | 2020-11-26 | Volkswagen Aktiengesellschaft | Brennkraftmaschine mit variabler Auslassventilbetätigung |
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2007
- 2007-02-16 DE DE102007007758A patent/DE102007007758A1/de not_active Withdrawn
-
2008
- 2008-02-14 EP EP08716853A patent/EP2118454B1/de not_active Not-in-force
- 2008-02-14 DE DE502008000602T patent/DE502008000602D1/de active Active
- 2008-02-14 WO PCT/EP2008/051805 patent/WO2008098991A1/de active Application Filing
- 2008-02-14 JP JP2009549832A patent/JP5398548B2/ja not_active Expired - Fee Related
- 2008-02-14 US US12/527,343 patent/US9080472B2/en not_active Expired - Fee Related
- 2008-02-14 AT AT08716853T patent/ATE466171T1/de active
Also Published As
Publication number | Publication date |
---|---|
US9080472B2 (en) | 2015-07-14 |
JP2010518322A (ja) | 2010-05-27 |
US20100212625A1 (en) | 2010-08-26 |
EP2118454B1 (de) | 2010-04-28 |
DE102007007758A1 (de) | 2008-08-21 |
ATE466171T1 (de) | 2010-05-15 |
EP2118454A1 (de) | 2009-11-18 |
DE502008000602D1 (de) | 2010-06-10 |
WO2008098991A1 (de) | 2008-08-21 |
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