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1. WO2019130760 - MULTI-CYLINDER ENGINE INTAKE STRUCTURE

Publication Number WO/2019/130760
Publication Date 04.07.2019
International Application No. PCT/JP2018/039238
International Filing Date 22.10.2018
IPC
F02M 35/10 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
35Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
10Air intakes; Induction systems
F02F 1/42 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads
24Cylinder heads
42Shape or arrangement of intake or exhaust channels in cylinder heads
F02M 26/17 2016.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
26Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation systems
13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
17in relation to the intake system
F02M 35/104 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
35Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
10Air intakes; Induction systems
104Intake manifolds
CPC
F02F 1/243
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads 
24Cylinder heads
243Cylinder heads and inlet or exhaust manifolds integrally cast together
F02F 1/42
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads 
24Cylinder heads
42Shape or arrangement of intake or exhaust channels in cylinder heads
F02F 1/4235
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads 
24Cylinder heads
42Shape or arrangement of intake or exhaust channels in cylinder heads
4235of intake channels
F02M 26/17
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
26Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
17in relation to the intake system
F02M 26/19
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
26Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
17in relation to the intake system
19Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
F02M 26/41
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
26Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
41characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
Applicants
  • ヤンマーパワーテクノロジー株式会社 YANMAR POWER TECHNOLOGY CO., LTD. [JP]/[JP]
Inventors
  • 内堀 正崇 UCHIBORI Masataka
  • 霜野 慎 SHIMONO Makoto
  • 池谷 亜以 IKETANI Ai
Agents
  • 宮地 正浩 MIYAJI Masahiro
Priority Data
2017-25049527.12.2017JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) MULTI-CYLINDER ENGINE INTAKE STRUCTURE
(FR) STRUCTURE D'ADMISSION DE MOTEUR À MULTIPLES CYLINDRES
(JA) 多気筒エンジンの吸気構造
Abstract
(EN) Provided is a technique for suppressing, while adopting a simple and logical configuration in a multi-cylinder engine, worsening of exhaust emissions due to EGR rate variations by allowing a mixture gas having an EGR gas substantially uniformly diffused therein to be distributed, as fresh air, into individual intake ports and taken into individual cylinders. This multi-cylinder engine intake structure is provided with: a fresh air distribution chamber 20 into which a plurality of fresh air distribution openings 25 communicating with the individual intake ports 12 are opened; and a gas collection chamber 30. The gas collection chamber 30 includes: a communication region 30B into which a first communication opening 7a communicating with the fresh air distribution chamber 20 is opened; a first mixture region 30A into which an air inlet 31a and an EGR gas inlet 32a are opened and which is positioned upstream of the communication region 30B in a flow direction of a mixture gas M of air A and EGR gas R; and a second mixture region 30C positioned downstream of the communication region 30B in the flow direction of the mixture gas M.
(FR) L'invention concerne une technique de suppression, tout en adoptant une configuration simple et logique dans un moteur à multiples cylindres, de la dégradation des émissions d'échappement causée par des variations du taux de RGE en permettant la distribution d'un gaz de mélange contenant un gaz de RGE diffusé de façon sensiblement uniforme à l'intérieur de celui-ci, en tant qu'air frais, dans des orifices d'admission individuels et admis dans des cylindres individuels. Cette structure d'admission de moteur à multiples cylindres comprend : une chambre de distribution d'air frais (20) dans laquelle s'ouvre une pluralité d'ouvertures de distribution d'air frais (25) communiquant avec les orifices d'admission individuels (12); et une chambre de collecte de gaz (30). La chambre de collecte de gaz (30) comprend : une région de communication (30B) dans laquelle s'ouvre une première ouverture de communication (7a) communiquant avec la chambre de distribution d'air frais (20); une première région de mélange (30A) dans laquelle s'ouvrent une entrée d'air (31a) et une entrée de gaz de RGE (32a) et qui est positionnée en amont de la région de communication (30B) dans une direction d'écoulement d'un gaz (M) de mélange d'air (A) et de gaz de RGE (R); et une deuxième région de mélange (30C) positionnée en aval de la région de communication (30B) dans la direction d'écoulement du gaz de mélange (M).
(JA) 多気筒エンジンにおいて、簡単且つ合理的な構成を採用しながら、EGRガスが略均質に拡散した混合ガスを新気として各吸気ポートに分配して各気筒に吸気させて、EGR率のばらつきに起因する排気エミッションの悪化を抑制する技術を提供する。各吸気ポート12に通じる複数の新気分配口25が開口する新気分配室20とガス収集室30とを備え、ガス収集室30が、新気分配室20に通じる第1連通口7aが開口する連通領域30Bと、空気導入口31a及びEGRガス導入口32aが開口すると共に空気AとEGRガスRとの混合ガスMの通流方向に沿って連通領域30Bよりも上流側に位置する第1混合領域30Aと、混合ガスMの通流方向に沿って連通領域30Bよりも下流側に位置する第2混合領域30Cとを有する。
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