KR900006660A - 직접 분사식 디이젤엔진 - Google Patents

직접 분사식 디이젤엔진 Download PDF

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Publication number
KR900006660A
KR900006660A KR1019890014410A KR890014410A KR900006660A KR 900006660 A KR900006660 A KR 900006660A KR 1019890014410 A KR1019890014410 A KR 1019890014410A KR 890014410 A KR890014410 A KR 890014410A KR 900006660 A KR900006660 A KR 900006660A
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South Korea
Prior art keywords
combustion chamber
diesel engine
engine according
cylinder
cylinder head
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KR1019890014410A
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English (en)
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히로시 오이까와
나오히사 나까시마
다다아끼 마쓰히사
다다오 오자와
Original Assignee
나까무라 유이찌
미쓰비시지 도오샤고오교 가부시끼가이샤
고하라 도시히또
닛뽕 가이시 가부시끼가이샤
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Publication of KR900006660A publication Critical patent/KR900006660A/ko

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    • 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
    • F02B23/0618—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 having in-cylinder means to influence the charge motion
    • F02B23/0621—Squish flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • 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
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
    • F02B19/165—The shape or construction of the pre-combustion chambers is specially adapted to be formed, at least in part, of ceramic material
    • 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
    • F02B23/0603—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
    • 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
    • F02B23/0672—Omega-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 center axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F7/0087—Ceramic materials
    • 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
    • F02B23/0603—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
    • F02B2023/0612—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head the material having a high temperature and pressure resistance, e.g. ceramic
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/40—Squish effect
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/249—Cylinder heads with flame plate, e.g. insert in the cylinder head used as a thermal insulation between cylinder head and combustion chamber
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

내용 없음

Description

직접 분사식 디이젤엔진
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 일실시예에 따른 직접분사식 디이젤엔진의 피스톤 연소실을 나타낸 종단면도,
제2도는 연소실의 여러가지 치수 파라미터를 나타낸 부분 확대도,
제3도는 제2도에 나타낸 연소실 개구부의 주변영역을 나타낸 부분 확대도.

Claims (15)

  1. 직접 연료분사식 디이젤엔진에 있어서, 예정된 보어경을 갖는 실린더와, 상기 실린더 상의 실린더헤드와, 상기 실린더내에 왕복운동 가능하게 배치되며 상기 실린더 헤드에 대향한 개구부와 내벽면을 가진 연소실이 형성되어 있는 피스톤 헤드를 갖는 피스톤과, 그리고 상기 실린더 헤드에 고정장착되어 상기 연소실 내로 연료를 직접 분사하는 연료 분사노즐로써 구성되며, 상기 연소실은 상기 개구경이 상기 실린더 보어경의 55%이하이고 최대경이 상기 개구경의 128% 이상이며, 상기 내벽면은 세라믹재료로써 필수적으로 구성되는 것을 특징으로 하는 직접 연료 분사식 디이젤엔진.
  2. 제1항에 있어서, 상기 연소실은 상기 개구경이 실린더 보어경의 45% 이하인 것을 특징으로 하는 디이젤엔진.
  3. 제1항에 있어서, 상기 연소실의 상기 개구경이 실린더 보어경의 25% 이상인 것을 특징으로 하는 디이젤엔진.
  4. 제1항에 있어서, 상기 피스톤 연소실의 상기 최대경이 그 개구경의 150% 이상인 것을 특징으로 하는 디이젤엔진.
  5. 제1항에 있어서, 피스톤 헤드내의 연소실 벽과 그 주변영역이 실리콘 나이트 라이드(silicon nitride), 일부 안정화 지르코니아(zirconia), 시알론(sialon), 알루미나(alumina) 그리고 실리콘 카아바이드(silicon carbide)로서 이루어지는 그룹중에서 선정된 적어도 하나의 세라믹재료로서 필수적으로 구성되는 것을 특징으로 하는 디이젤엔진.
  6. 제1항에 있어서, 연소실 벽의 세라믹재료의 엔진의 표준작동온도하에서 열전도율이 0.08cal/cm.s℃ 이하인 것을 특징으로 하는 디이젤엔진.
  7. 제6항에 있어서, 연소실 벽의 세라믹 재료의 열전도율이 엔진의 표준작동온도하에서 0.05ca./cm.s.℃ 이하인 것을 특징으로 하는 디이젤엔진.
  8. 제1항에 있어서, 연소실 벽면이 0.02. cal/cm.s.℃ 이상의 열전도율을 가진 세라믹재료로써 구성되는 것을 특징으로 하는 디이젤엔진.
  9. 제8항에 있어서, 0.02cal/cm.s.℃ 이하의 열전도율을 갖는 재료로써 형성된 단열부재가 엔진의 냉각계로의 열전달경로에 포함되지만 연소가스에 직접 노출되지 않는 위치에 배치되는 것을 특징으로 하는 디이젤엔진.
  10. 제9항에 있어서, 상기 단열부재가 상기 실린더 헤드내, 실린더 헤드 본체와 본체아래의 실린더 헤드플레이트 사이에 배치되는 것을 특징으로 하는 디이젤엔진.
  11. 제9항에 있어서, 상기 단열부재가 상기 실린더 헤드내, 실린더 헤드 본체와 본체아래의 실린더 헤드플레이트 사이에 배치되는 것을 특징으로 하는 디이젤엔진.
  12. 제1항에 있어서, 피스톤 연소실의 상기 내표면은 그 최대경에 해당하는 영역에서 연소실의 중심측을 포함하는 평면내의 곡률반경이 실린더 보어경이 5% 이상인 것을 특징으로 하는 디이젤엔진.
  13. 제12항에 있어서, 피스톤 연소실의 상기 내표면은 그 최대경에 해당하는 영역에서, 연소실의 중심축을 포함하는 평면내의 곡률반경이 실린더 보어경의 7% 이상인 것을 특징으로 하는 디이젤엔진.
  14. 제1항에 있어서, 상기 연소실 개구부의 상하 주변모서리가 0.5mm 이하의 곡률반경을 가지는 것을 특징으로 하는 디이젤엔진.
  15. 제14항에 상기 있어서, 상기 연소실 개구부의 상하 주변 모서리가 0.3mm 이하의 곡률반경을 가지는 것을 특징으로 하는 디이젤엔진.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890014410A 1988-10-07 1989-10-06 직접 분사식 디이젤엔진 KR900006660A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63-252157 1988-10-07
JP63252157A JPH0299718A (ja) 1988-10-07 1988-10-07 直接噴射式ディーゼル機関の燃焼室構造

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KR900006660A true KR900006660A (ko) 1990-05-08

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US (1) US4953528A (ko)
EP (1) EP0363190B1 (ko)
JP (1) JPH0299718A (ko)
KR (1) KR900006660A (ko)
DE (1) DE68906631T2 (ko)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR20010110266A (ko) * 2001-11-15 2001-12-12 김창선 단열 처리된 엔진, 배출에너지를 재활용하는 엔진 및 그엔진이 장착된 고압 분사체

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EP0363190B1 (en) 1993-05-19
DE68906631D1 (de) 1993-06-24
US4953528A (en) 1990-09-04
JPH0299718A (ja) 1990-04-11
EP0363190A3 (en) 1990-07-04
EP0363190A2 (en) 1990-04-11
DE68906631T2 (de) 1993-12-09

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