JP4384945B2 - 直噴式ディーゼル機関の燃焼室形状 - Google Patents
直噴式ディーゼル機関の燃焼室形状 Download PDFInfo
- Publication number
- JP4384945B2 JP4384945B2 JP2004203257A JP2004203257A JP4384945B2 JP 4384945 B2 JP4384945 B2 JP 4384945B2 JP 2004203257 A JP2004203257 A JP 2004203257A JP 2004203257 A JP2004203257 A JP 2004203257A JP 4384945 B2 JP4384945 B2 JP 4384945B2
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- JP
- Japan
- Prior art keywords
- combustion chamber
- ratio
- diesel engine
- diameter
- shape
- 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 description 55
- 238000002347 injection Methods 0.000 title claims description 29
- 239000007924 injection Substances 0.000 title claims description 29
- 239000000446 fuel Substances 0.000 claims description 52
- 239000007921 spray Substances 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000000779 smoke Substances 0.000 description 42
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000015067 sauces Nutrition 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
- F02B23/0651—Means or methods to improve the spray dispersion, evaporation or ignition the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Description
本発明の目的は、無負荷運転時において、黒煙の発生量を抑制すると同時に、負荷運転時のNOx及び燃費も良好に維持できるディーゼル機関の燃焼室形状を提供することである。
(燃焼室の構成)
図1は本発明を適用した直噴式ディーゼル機関の燃焼室の拡大縦断面図であり、この図1において、シリンダブロックのシリンダライナ1内にピストン2が嵌合しており、ピストン2の頂壁3に燃焼室(キャビティ)5を形成してあり、燃焼室5の上方は、シリンダヘッド7の下面により閉塞されている。シリンダヘッド7には、シリンダ中心線C1上に噴口中心O1が位置する燃料噴射弁10が取り付けられており、噴口角度αで燃料を円錐状に噴射(噴霧)するようになっている。なお、図1のピストン2は上死点位置の状態で示してある。
図3は、圧縮比を一定とし、燃焼室深さH1に対する山部高さH2の比H2/H1の変化と、無負荷運転時の黒煙(黒煙濃度)の関係を示す図である。図3から理解できるように、上記比H2/H1が0.85〜1.00の範囲では、黒煙の発生量が最低値に抑制された状態で変化せず、上記比H2/H1が0.85から0.7へ小さくなる範囲では、黒煙の発生量は穏やかに増加するが、上記比H2/H1が0.7よりも小さくなると、黒煙の発生量は急激に増加する。したがって、上記比H2/H1の範囲を、0.7≦H2/H1≦1.0とすることにより、黒煙の発生量を許容可能な範囲に抑制でき、好ましくは、0.85≦H2/H1≦1.0の範囲にすることにより、黒煙の発生量を効果的に抑制することができるのである。
2 ピストン
3 ピストン頂壁
5 燃焼室
7 シリンダヘッド
10 燃料噴射弁
12 山部
13 山部の頂面
14 傾斜面部
15 受け皿部
20 噴口
Claims (4)
- ピストン頂壁に凹状の燃焼室を形成し、略シリンダ中心線上に噴口中心を有する燃料噴射弁の噴口から所定の噴口角度で前記燃焼室に燃料を噴射する直噴式ディーゼル機関の燃焼室形状において、
燃焼室の壁面は、
燃焼室中央部に形成されると共に燃料噴霧が衝突しない斜面角度及び裾端直径を有する裁頭円錐状の山部(12)と、
該山部(12)の裾端から山部(12)の斜面角度より小さい角度で外下がりに傾斜すると共に前記燃料噴霧が衝突して径方向の外周側に流れる傾斜面部(14)と、
該傾斜面部の外周端から円弧状に立ち上がって燃焼室外周端に至ると共に前記燃料噴霧が衝突してトッププリアランスT側に流れる受け皿部(15)と、
から構成されている、
ことを特徴とする直噴式ディーゼル機関の燃焼室形状。 - 前記山部は、燃焼室深さH1に対する燃焼室底面からの山部高さH2の比H2/H1が、0.7≦H2/H1≦1.0であり、ボア径Bに対する山部頂面の直径D1の比D1/Bが、D1/B≦0.3であり、ボア径Bに対する山部の裾端の直径D2の比D2/Bが、D2/B≦0.5であることを特徴とする請求項1記載の直噴式ディーゼル機関の燃焼室形状。
- 噴口直径dに対する噴霧到達距離Lの比L/dが、150≦L/d≦250であることを特徴とする請求項1又は2記載の直噴式ディーゼル機関の燃焼室形状。
- 前記傾斜面部の斜面角度θは、0°<θ≦15°であることを特徴とする請求項1〜3のいずれか一つに記載の直噴式ディーゼル機関の燃焼室形状。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004203257A JP4384945B2 (ja) | 2004-07-09 | 2004-07-09 | 直噴式ディーゼル機関の燃焼室形状 |
DK05743770.9T DK1767758T3 (da) | 2004-07-09 | 2005-05-25 | Form på forbrændingsmotorkammer på dieselmotor med direkte indsprøjtning |
CNB2005800229325A CN100504048C (zh) | 2004-07-09 | 2005-05-25 | 直喷式柴油机的燃烧室形状 |
US11/629,707 US7472678B2 (en) | 2004-07-09 | 2005-05-25 | Combustion chamber shape of direct injection type diesel engine |
EP05743770A EP1767758B1 (en) | 2004-07-09 | 2005-05-25 | Shape of combustion chamber of direct-injection diesel engine |
PCT/JP2005/009545 WO2006006308A1 (ja) | 2004-07-09 | 2005-05-25 | 直噴式ディーゼル機関の燃焼室形状 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004203257A JP4384945B2 (ja) | 2004-07-09 | 2004-07-09 | 直噴式ディーゼル機関の燃焼室形状 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006022773A JP2006022773A (ja) | 2006-01-26 |
JP4384945B2 true JP4384945B2 (ja) | 2009-12-16 |
Family
ID=35783665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004203257A Expired - Fee Related JP4384945B2 (ja) | 2004-07-09 | 2004-07-09 | 直噴式ディーゼル機関の燃焼室形状 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7472678B2 (ja) |
EP (1) | EP1767758B1 (ja) |
JP (1) | JP4384945B2 (ja) |
CN (1) | CN100504048C (ja) |
DK (1) | DK1767758T3 (ja) |
WO (1) | WO2006006308A1 (ja) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004045634A1 (de) * | 2004-09-21 | 2006-04-06 | Daimlerchrysler Ag | Brennkraftmaschine |
FR2925601A1 (fr) * | 2007-12-19 | 2009-06-26 | Renault Sas | Chambre de combustion pour moteur thermique |
FI121089B (fi) * | 2008-05-19 | 2010-06-30 | Waertsilae Finland Oy | Puristussytytteinen polttomoottori ja menetelmä polttomoottorin käyttämiseksi |
US10180115B2 (en) | 2010-04-27 | 2019-01-15 | Achates Power, Inc. | Piston crown bowls defining combustion chamber constructions in opposed-piston engines |
CN102947545B (zh) | 2010-04-27 | 2015-11-25 | 阿凯提兹动力公司 | 用于对置活塞发动机的燃烧室构造 |
US9512779B2 (en) | 2010-04-27 | 2016-12-06 | Achates Power, Inc. | Swirl-conserving combustion chamber construction for opposed-piston engines |
CN103168148B (zh) | 2010-08-16 | 2015-09-02 | 阿凯提兹动力公司 | 对置活塞发动机的燃料喷射的喷洒模式 |
US9309807B2 (en) | 2011-05-18 | 2016-04-12 | Achates Power, Inc. | Combustion chamber constructions for opposed-piston engines |
US20130104848A1 (en) | 2011-10-27 | 2013-05-02 | Achates Power, Inc. | Fuel Injection Strategies in Opposed-Piston Engines with Multiple Fuel Injectors |
DE102012103195A1 (de) | 2012-04-13 | 2013-10-17 | Mwm Gmbh | Kolben einer Brennkraftmaschine |
DE102012103212A1 (de) * | 2012-04-13 | 2013-10-17 | Mwm Gmbh | Kolben einer Brennkraftmaschine |
DE102012103206B4 (de) | 2012-04-13 | 2017-08-03 | Caterpillar Energy Solutions Gmbh | Kolben einer Brennkraftmaschine |
US9211797B2 (en) | 2013-11-07 | 2015-12-15 | Achates Power, Inc. | Combustion chamber construction with dual mixing regions for opposed-piston engines |
CN103835803B (zh) * | 2014-02-24 | 2016-02-24 | 大连理工大学 | 柴油机碰撞分流燃烧室 |
JP6160564B2 (ja) * | 2014-06-09 | 2017-07-12 | マツダ株式会社 | ディーゼルエンジン |
US20160053712A1 (en) * | 2014-08-19 | 2016-02-25 | Deere & Company | Piston for Use in an Engine |
CN104632353B (zh) * | 2014-12-26 | 2018-06-05 | 江苏大学 | 一种直喷式柴油机碰撞喷雾扩散燃烧*** |
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FR840691A (fr) * | 1938-07-15 | 1939-05-02 | Moteur à combustion interne | |
US2828724A (en) * | 1953-10-08 | 1958-04-01 | Schweizerische Lokomotiv | Internal combustion engines of the injection type |
GB751585A (en) * | 1953-10-08 | 1956-06-27 | Schweizerische Lokomotiv | Improvements in or relating to internal combustion engines of the fuel injection type |
US2914044A (en) * | 1955-09-07 | 1959-11-24 | Maschf Augsburg Nuernberg Ag | Self-igniting combustion engine |
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JPS55153816A (en) * | 1979-05-17 | 1980-12-01 | Yanmar Diesel Engine Co Ltd | Combustion chamber of direct injection type diesel engine |
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JPH05106442A (ja) | 1991-10-15 | 1993-04-27 | Yanmar Diesel Engine Co Ltd | 直接噴射式デイーゼル機関 |
JPH06185364A (ja) * | 1992-12-16 | 1994-07-05 | Isuzu Motors Ltd | 直噴式ディーゼル機関の燃焼室 |
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JP2002349267A (ja) * | 2001-05-28 | 2002-12-04 | Isuzu Motors Ltd | ディーゼルエンジンの燃焼システム |
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JP2003214297A (ja) | 2002-01-24 | 2003-07-30 | Yanmar Co Ltd | ディーゼル機関の燃料噴射弁 |
FR2839114B1 (fr) * | 2002-04-24 | 2004-07-30 | Renault Sa | Chambre de combustion de moteur multicylindre a allumage par compression, notamment de type diesel a injection directe, et moteur associe |
US6739308B1 (en) * | 2002-05-24 | 2004-05-25 | Hatch & Kirk, Inc. | Fuel igniter and head for use in diesel engines and related systems and methods |
US7032566B2 (en) * | 2003-05-30 | 2006-04-25 | Caterpillar Inc. | Fuel injector nozzle for an internal combustion engine |
-
2004
- 2004-07-09 JP JP2004203257A patent/JP4384945B2/ja not_active Expired - Fee Related
-
2005
- 2005-05-25 DK DK05743770.9T patent/DK1767758T3/da active
- 2005-05-25 WO PCT/JP2005/009545 patent/WO2006006308A1/ja not_active Application Discontinuation
- 2005-05-25 CN CNB2005800229325A patent/CN100504048C/zh not_active Expired - Fee Related
- 2005-05-25 EP EP05743770A patent/EP1767758B1/en not_active Expired - Fee Related
- 2005-05-25 US US11/629,707 patent/US7472678B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
DK1767758T3 (da) | 2012-03-26 |
EP1767758A4 (en) | 2010-08-11 |
JP2006022773A (ja) | 2006-01-26 |
US7472678B2 (en) | 2009-01-06 |
US20070272191A1 (en) | 2007-11-29 |
WO2006006308A1 (ja) | 2006-01-19 |
CN100504048C (zh) | 2009-06-24 |
CN1981118A (zh) | 2007-06-13 |
EP1767758A1 (en) | 2007-03-28 |
EP1767758B1 (en) | 2012-02-22 |
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