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    • 48. 发明公开
    • EXHAUST TREATMENT DEVICE FOR DIESEL ENGINE
    • 柴油机排气处理装置
    • EP2832961A1
    • 2015-02-04
    • EP13768358.7
    • 2013-02-25
    • Kubota Corporation
    • AKETA MasahiroMATSUKAWA YosukeSUGIMOTO Satoshi
    • F01N3/01F01N3/02F01N3/037F01N3/08F02D21/08F02D23/00
    • F01N3/0892B01D53/32B01D53/922B01D2258/012B01D2259/818F01N3/01F01N3/037F02M26/15F02M26/35Y02T10/121Y02T10/20
    • To provide an exhaust treatment device for a diesel engine capable of reducing NOx concentration in a discharged gas.
      In order to solve this problem, there is provided an exhaust treatment device for a diesel engine in which an exhaust flow divider 2 is provided in an exhaust path 1, the exhaust flow divider 2 causes an exhaust 3 to flow an EGR gas 4 with PM unevenly distributed and a remaining discharged gas 5 in a divided manner, the EGR gas 4 is recirculated to a combustion chamber 6, and the discharged gas 5 is discharged to an atmospheric side, wherein a first corona discharge passage 7 and a second corona discharge passage 8 are provided at the exhaust flow divider 2, corona discharge in the first corona discharge passage 7 causes the PM, water vapor, and oxygen in the exhaust 3 to generate electron attachment, electrostatic force causes the exhaust 3 to flow the EGR gas 4 with the electron-attached PM, water vapor, and oxygen unevenly distributed and the remaining discharged gas 5 in a divided manner, the discharged gas 5 is guided to the second corona discharge passage 8, corona discharge in the second corona discharge passage 8 causes gas molecules in the discharged gas 5 to dissociate, and NOx in the discharged gas 5 is reduced to nitrogen.
    • 提供一种能够降低排出气体中的NOx浓度的柴油发动机的排气处理装置。 为了解决该问题,提供了一种用于柴油发动机的排气处理装置,其中排气分流器2设置在排气通道1中,排气分流器2使得排气3使EGR气体4在PM 不均匀分布的废气5和分开的剩余排气5,EGR气体4被再循环到燃烧室6,并且排气5被排放到大气侧,其中第一电晕放电通道7和第二电晕放电通道 8被设置在排气分流器2处,第一电晕放电通道7中的电晕放电引起排气3中的PM,水蒸气和氧气产生电子附着,静电力使得排气3使EGR气体4流动 电子附着的PM,水蒸汽和氧气不均匀地分布并将剩余的排出气体5分开,排出的气体5被引导到第二电晕放电通道8,电晕放电在t 第二电晕放电通道8使放电气体5中的气体分子解离,并且放电气体5中的NOx被还原成氮气。