JP2008157223A - 可変駆動する吸気弁と一定リフトのブート部分を含むリフトプロファイルとを有する内燃機関 - Google Patents
可変駆動する吸気弁と一定リフトのブート部分を含むリフトプロファイルとを有する内燃機関 Download PDFInfo
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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
- 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
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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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
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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
- 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
- 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
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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
- F02D13/0223—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
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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
- F02D13/0261—Controlling the valve overlap
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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
- F02D13/0269—Controlling the valves to perform a Miller-Atkinson cycle
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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
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0535—Single overhead camshafts [SOHC]
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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
- F01L1/34—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
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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
-
- 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)
Abstract
【解決手段】本願による内燃機関は、吸気弁(7)と各制御カムとの間に介装された圧力流体室(C)を含む吸気弁(7)に対する可変駆動装置と、各カムが弁を開いた状態を維持する状態の場合でも、各付勢ばね手段(9)によって吸気弁(7)を急速に閉じるために、圧力流体室(C)を開放して流体を排出させる電磁弁(24)と、を備える。可変弁作動系統は、略一定のリフトのブート部分(C2)を含む吸気弁リフトプロファイルを上昇させるように成形された吸気弁制御用のカムの使用との組合せにより使用される。このブート部分は、過給機付き直噴式ガソリン機関の場合、TDCの前に吸気弁開弁サイクルの最初の部分に設定される。逆に、ディーゼル機関の場合、ブート部分(C2)は、BDC後の吸気弁開弁サイクルの最終部分に設定される。
【選択図】図6
Description
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 (10)
- 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)を備えている多気筒の内燃機関において、
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ことを特徴とする多気筒の内燃機関。 - 請求項1に記載の内燃機関において、
該内燃機関は、ガソリン機関、特に過給機付きガソリン機関、とりわけ直噴式ガソリン機関であり、
略一定のリフト(H)の前記ブート部分(C2)は、前記各シリンダのピストンの上死点(TDC)より前であって、吸気弁リフトサイクルの初期部分に設定されていることを特徴とする内燃機関。 - 請求項2に記載の内燃機関において、
前記電子制御手段は、前記内燃機関の回転速度が所定の閾値未満のときに前記ブート部分(C2)が有効となるように、前記吸気弁リフトサイクルの前記初期部分の間、前記電磁弁(24)を閉状態に維持することを特徴とする内燃機関。 - 請求項2に記載の内燃機関において、
前記ブート部分(C2)の前記一定のリフト(H)が前記吸気弁(7)の最大リフトの少なくとも4分の1に等しいことを特徴とする内燃機関。 - 請求項2に記載の内燃機関において、
略一定のリフト(H)の前記ブート部分(C2)が上死点(TDC)の前の駆動軸の回転角度で少なくとも40°の範囲に亘ることを特徴とする内燃機関。 - 請求項2に記載の内燃機関において、
前記ブート部分(C2)のリフト変動範囲は、0.2mm/rad未満であることを特徴とする内燃機関。 - 請求項1に記載の内燃機関において、
該内燃機関はディーゼル機関であり、
略一定のリフト(H)の前記ブート部分(C2)が下死点(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いることを特徴とする内燃機関。 - 請求項7に記載の内燃機関において、
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内燃機関。 - 請求項7に記載の内燃機関において、
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内燃機関。 - 請求項7に記載の内燃機関において、
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内燃機関。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
EP06425851.0 | 2006-12-20 |
Related Child Applications (1)
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JP2012189699A Division JP5562386B2 (ja) | 2006-12-20 | 2012-08-30 | 多気筒ディーゼル機関 |
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JP2008157223A true JP2008157223A (ja) | 2008-07-10 |
JP5279241B2 JP5279241B2 (ja) | 2013-09-04 |
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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 |
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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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JP2010112372A (ja) * | 2008-11-07 | 2010-05-20 | Crf Soc Consortile Per Azioni | 互いに同径で接続されたメインローブおよび追加のローブを有し吸気弁を制御するカムを備えるディーゼルエンジン |
JP2010138902A (ja) * | 2008-12-09 | 2010-06-24 | Man Diesel Se | 内燃機関のバルブを制御するための方法及びバルブカム |
JP2012007611A (ja) * | 2010-06-18 | 2012-01-12 | Crf Soc Consortile Per Azioni | 非作動となり得るシリンダを備え、吸気バルブの可変制御で排気再循環を行う、内燃エンジン、及び、内燃エンジンの制御方法 |
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JP2010138902A (ja) * | 2008-12-09 | 2010-06-24 | Man Diesel Se | 内燃機関のバルブを制御するための方法及びバルブカム |
JP2012530211A (ja) * | 2009-06-17 | 2012-11-29 | ワルトシラ フィンランド オサケユキチュア | ピストンエンジンのガス交換用制御装置 |
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Also Published As
Publication number | Publication date |
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ES2318714T3 (es) | 2009-05-01 |
ATE417997T1 (de) | 2009-01-15 |
DE602006004371D1 (de) | 2009-01-29 |
EP1936132A1 (en) | 2008-06-25 |
US20080149055A1 (en) | 2008-06-26 |
JP5279241B2 (ja) | 2013-09-04 |
JP5562386B2 (ja) | 2014-07-30 |
US7819100B2 (en) | 2010-10-26 |
JP2012229707A (ja) | 2012-11-22 |
EP1936132B1 (en) | 2008-12-17 |
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