Exhaust purification unit
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United States of America Patent
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Oct 19, 2021
Grant Date -
Apr 26, 2018
app pub date -
Mar 29, 2016
filing date -
Mar 30, 2015
priority date (Note) -
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Abstract
An exhaust purification unit includes: a connecting pipe transmitting exhaust gas to a selective reduction catalyst (SCR); a urea water injection valve arranged to face an exhaust upstream end of the connecting pipe and injecting urea water into the connecting pipe; a mixer chamber forming a flow path along which exhaust gas flows from an exhaust downstream end of a front stage casing and turns back to the exhaust upstream end of the connecting pipe; and a flow adjustment member provided in the mixer chamber, being a member having a truncated-cone shape which extends from a vicinity of the injection opening of the urea water injection valve towards the connecting pipe with a diameter thereof gradually increasing, in which a plurality of small holes is formed, and in which a claw that guides the exhaust gas towards the exhaust downstream-side is provided for each of the plurality of small holes.
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