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1. (WO2018198347) EXHAUST GAS PURIFICATION DEVICE

Pub. No.:    WO/2018/198347    International Application No.:    PCT/JP2017/017029
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: F01N 3/24
Applicants: TOKYO ROKI CO., LTD.
東京濾器株式会社
Inventors: AIZAWA, Hayato
相澤 勇人
TAKAYA, Tomohide
高屋 知秀
EBARA, Yuu
江原 佑
URAHAMA, Tomomi
浦濱 智美
MORI, Hitoshi
森 仁志
Title: EXHAUST GAS PURIFICATION DEVICE
Abstract:
In this exhaust gas purification device 1, an introduction part 20 for diffusing exhaust gas in the radial direction of a DOC 21 is disposed to an upstream side of the DOC 21 in a flow passage 2. The introduction part 20 includes: a flow inlet GI into which exhaust gas flows from the side relative to the flow passage 2; and an overhang part 20b that covers an exhaust gas inflow-side end surface of the DOC 21. The flow inlet GI forms a shape that widens toward a connection end part 20a on the DOC 21 side of the overhang part 20b up to a position near the outer periphery of the DOC 21. An area of the overhang part 20b facing the DOC 21 forms a shape that expands toward the outside of a casing 4, which is the side opposite the DOC 21. In the inside of the introduction part 20, a baffle 201, in which a plurality of punching holes 201a are formed on one surface facing the flow inlet GI side, is provided along the outer diameter of the DOC 21. Due to this configuration, exhaust gas can be uniformly introduced to a catalyst with a simple configuration, and exhaust gas purification performance can be sufficiently achieved.