JP5562386B2 - 多気筒ディーゼル機関 - Google Patents
多気筒ディーゼル機関 Download PDFInfo
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- JP5562386B2 JP5562386B2 JP2012189699A JP2012189699A JP5562386B2 JP 5562386 B2 JP5562386 B2 JP 5562386B2 JP 2012189699 A JP2012189699 A JP 2012189699A JP 2012189699 A JP2012189699 A JP 2012189699A JP 5562386 B2 JP5562386 B2 JP 5562386B2
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- valve
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- intake valve
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- engine
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- 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
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead 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
- 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
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- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
- F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
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- 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
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
- F02D13/0219—Variable control of intake and exhaust valves changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
-
- 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
- F02D13/0223—Variable control of the intake valves only
- F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
- F02D13/023—Variable control of the intake valves only changing valve lift or valve lift and timing the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related
-
- 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
- F02D13/0261—Controlling the valve overlap
-
- 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
- F02D13/0269—Controlling the valves to perform a Miller-Atkinson cycle
-
- 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
- F01L1/053—Camshafts overhead type
- F01L2001/0535—Single overhead camshafts [SOHC]
-
- 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
- F01L1/3442—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 hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34446—Fluid accumulators for the feeding circuit
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- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/10—Providing exhaust gas recirculation [EGR]
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- 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)
- Valve-Gear Or Valve Arrangements (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
ガソリン機関の参考例において、従来型機関でもすでに得ることができている前記「掃気」効果は、上述の形式の可変弁駆動系統を図4の線図形式で示されるプロファイルを有する吸気弁を制御するカムの利用と組み合わせることで得られる。図4において、プロファイルはカムの表示の左回りで示される。ここで示されるように、吸気弁リフトを生成するカムのプロファイルの部分C1は、弁リフトサイクルの初期部分において略一定のリフトのブート部分C2を有するプロファイルである。
ディーゼル機関に適用される本発明の実施形態において、吸気弁を制御するカムは図6で示される線図形式で示されるプロファイルを示し(カム軸の右回りの回転を参照)、図7で示さるタイプの吸気弁リフトプロファイルを生成する。
9 付勢ばね手段
11 カム軸
14 カム
15 タペット
16 ポンピングピストン
23 放出路
24 電磁弁
70 排気弁
C 圧力流体室
C2 ブート部分
H リフト
Claims (4)
- 吸気通路を制御する少なくとも一つの吸気弁(7)と排気通路を制御する少なくとも一つの排気弁とを各気筒に備えると共に、前記吸気弁(7)及び排気弁をそれぞれ閉位置に付勢する付勢ばね手段(9)を備え、
前記吸気弁(7)と前記排気弁とをそれぞれタペット(15)を介して作動させる少なくとも一つのカム軸を備え、
少なくとも各吸気弁(7)は、油圧手段を介して前記各タペット(15)に連結されると共に、前記付勢ばね手段(9)の付勢力に抗して各タペット(15)により前記油圧手段を介して作動される可変駆動型であり、前記油圧手段は、前記タペット(15)に連結されたポンピングピストン(16)に対向する圧力流体室(C)を含んでおり、
該圧力流体室(C)は、前記各タペット(15)から前記可変駆動型の吸気弁(7)への動力伝達を切断して前記各付勢ばね手段(9)の付勢作用により前記吸気弁(7)を急速に閉じるために、電磁弁(24)を介して放出路に接続されており、
前記内燃機関の1つ以上の作動パラメータの関数として前記可変駆動型の吸気弁(7)の開弁時期および開弁期間(リフト)を変更させるように前記各電磁弁(24)を制御する電子制御手段(25)を備えており、
各吸気弁(7)を作動させる前記カム軸のカムは、略一定のリフト(H)のブート部分(C2)を含む弁リフトプロファイルを生成するように形成されている、多気筒ディーゼル機関において、
略一定のリフト(H)の前記ブート部分(C2)は、下死点(BDC)の後であって、吸気弁リフトサイクルの最終部分に設定されており、
前記電子制御手段は、より高い圧縮比で作動させることが必要な時に、電磁弁を開くことによって、一定リフトの前記ブート部分(C2)が減少するように、電磁弁(24)を制御するようになっており、
さらに、前記電磁弁(24)を開く時期は、略一定リフト(H)の前記ブート部分(C2)の持続時間が変更可能となるように、変更可能となっている、ことを特徴とする多気筒ディーゼル機関。 - 請求項1に記載の多気筒ディーゼル機関において、
前記ブート部分(C2)は、下死点(BDC)の後、駆動軸の回転角度で40°以上かつ100°以下の範囲に設定されていることを特徴とする多気筒ディーゼル機関。 - 請求項1に記載の多気筒ディーゼル機関において、
前記ブート部分(C2)の前記略一定のリフト(H)は、前記吸気弁の最大リフトの3分の1以下であることを特徴とする多気筒ディーゼル機関。 - 請求項1に記載の多気筒ディーゼル機関において、
前記ブート部分(C2)のリフト変動範囲は、0.2mm/rad以下であることを特徴とする多気筒ディーゼル機関。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06425851.0 | 2006-12-20 | ||
EP06425851A EP1936132B1 (en) | 2006-12-20 | 2006-12-20 | Internal combustion engine with intake valves having a variable actuation and a lift profile including a constant lift boot portion |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007306095A Division JP5279241B2 (ja) | 2006-12-20 | 2007-11-27 | 多気筒内燃機関 |
Publications (2)
Publication Number | Publication Date |
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JP2012229707A JP2012229707A (ja) | 2012-11-22 |
JP5562386B2 true JP5562386B2 (ja) | 2014-07-30 |
Family
ID=38110768
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007306095A Active JP5279241B2 (ja) | 2006-12-20 | 2007-11-27 | 多気筒内燃機関 |
JP2012189699A Active JP5562386B2 (ja) | 2006-12-20 | 2012-08-30 | 多気筒ディーゼル機関 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007306095A Active JP5279241B2 (ja) | 2006-12-20 | 2007-11-27 | 多気筒内燃機関 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7819100B2 (ja) |
EP (1) | EP1936132B1 (ja) |
JP (2) | JP5279241B2 (ja) |
AT (1) | ATE417997T1 (ja) |
DE (1) | DE602006004371D1 (ja) |
ES (1) | ES2318714T3 (ja) |
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EP1555398B1 (en) | 2004-01-16 | 2007-02-28 | C.R.F. Società Consortile per Azioni | Internal combustion engine having a single camshaft which controls the exhaust valves mechanically, and the intake valves through an electronically controlled hydraulic device |
DE602004005600T2 (de) | 2004-10-28 | 2007-12-27 | C.R.F. S.C.P.A. | Brennkraftmaschine mit einer elektronischen Steuerung für eine Hydraulikvorrichtung zur variablen Betätigung von Einla ventilen |
JP2006207504A (ja) * | 2005-01-28 | 2006-08-10 | Mazda Motor Corp | エンジンのegr量推定方法およびエンジンの制御装置 |
JP2006220062A (ja) * | 2005-02-10 | 2006-08-24 | Toyota Motor Corp | 水素添加内燃機関の制御装置 |
EP1728978B1 (en) * | 2005-05-24 | 2007-10-31 | C.R.F. Società Consortile per Azioni | System and method for controlling load and combustion in an internal-combustion engine by valve actuation according to a multiple lift (multilift) cycle |
-
2006
- 2006-12-20 ES ES06425851T patent/ES2318714T3/es active Active
- 2006-12-20 AT AT06425851T patent/ATE417997T1/de not_active IP Right Cessation
- 2006-12-20 EP EP06425851A patent/EP1936132B1/en active Active
- 2006-12-20 DE DE602006004371T patent/DE602006004371D1/de active Active
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2007
- 2007-11-27 JP JP2007306095A patent/JP5279241B2/ja active Active
- 2007-12-12 US US12/000,448 patent/US7819100B2/en active Active
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Publication number | Publication date |
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JP5279241B2 (ja) | 2013-09-04 |
DE602006004371D1 (de) | 2009-01-29 |
US20080149055A1 (en) | 2008-06-26 |
ES2318714T3 (es) | 2009-05-01 |
JP2008157223A (ja) | 2008-07-10 |
US7819100B2 (en) | 2010-10-26 |
EP1936132B1 (en) | 2008-12-17 |
ATE417997T1 (de) | 2009-01-15 |
JP2012229707A (ja) | 2012-11-22 |
EP1936132A1 (en) | 2008-06-25 |
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