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1. WO2021065723 - EXHAUST GAS RECIRCULATION DEVICE

Publication Number WO/2021/065723
Publication Date 08.04.2021
International Application No. PCT/JP2020/036290
International Filing Date 25.09.2020
IPC
F02M 26/05 2016.01
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
02EGR systems specially adapted for supercharged engines
04with a single turbocharger
05High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
F02M 26/38 2016.01
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
38with two or more EGR valves disposed in parallel
F02M 26/42 2016.01
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
42having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
Applicants
  • いすゞ自動車株式会社 ISUZU MOTORS LIMITED [JP]/[JP]
Inventors
  • 大久保 幸広 OKUBO Yukihiro
  • 和光 栄治 WAKO Eiji
  • 山中 清志郎 YAMANAKA Kyoshiro
  • 山本 泰裕 YAMAMOTO Yasuhiro
Agents
  • 日比谷 征彦 HIBIYA Yukihiko
  • 日比谷 洋平 HIBIYA Yohei
Priority Data
2019-18050330.09.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) EXHAUST GAS RECIRCULATION DEVICE
(FR) DISPOSITIF DE RECIRCULATION DE GAZ D’ÉCHAPPEMENT
(JA) 排気再循環装置
Abstract
(EN)
An exhaust gas recirculation device 80 comprises a plurality of systems of recirculation channels 81 and 82 that branch from an exhaust system of an engine 10 and merge with an intake system of the engine 10, thereby recirculating at least part of exhaust gases to the intake system, wherein, of the plurality of systems of recirculation channels 81 and 82, at least two systems of recirculation channels 81 and 82 are formed with channel lengths that differ from each other, and of the recirculation channels 81 and 82 with different channel lengths, at a predetermined portion of the shorter recirculation channel 81, a reduced-diameter portion 40 that reduces the channel diameter of the shorter recirculation channel 81 is provided.
(FR)
L'invention concerne un dispositif de recirculation des gaz d'échappement 80 comprenant une pluralité de systèmes de canaux de recirculation 81 et 82 qui se ramifient à partir d'un système d'échappement d'un moteur 10 et fusionnent avec un système d'admission du moteur 10, ce qui permet de faire recirculer au moins une partie des gaz d'échappement vers le système d'admission, où, parmi la pluralité de systèmes de canaux de recirculation 81 et 82, au moins deux systèmes de canaux de recirculation 81 et 82 sont formés avec des longueurs de canal qui diffèrent l'une de l'autre et, parmi les canaux de recirculation 81 et 82 avec différentes longueurs de canal, au niveau d'une partie prédéterminée du canal de recirculation plus court 81, une partie à diamètre réduit 40 réduit le diamètre de canal du canal de recirculation plus court 81.
(JA)
エンジン10の排気系から分岐して、エンジン10の吸気系に合流することにより、排気の少なくとも一部を吸気系に再循環させる複数系統の再循環通路81,82を備える排気再循環装置80であって、複数系統の再循環通路81,82は、少なくとも2系統の再循環通路81,82が互いに異なる流路長で形成されており、当該異なる流路長の再循環通路81,82のうち、短い再循環通路81の所定部位に、当該短い再循環通路81の流路径を縮小させる縮径部40が設けられている。
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