Exhaust gas purification apparatus, and method for thawing liquid reducing agent or precursor thereof
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United States of America Patent
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Aug 15, 2017
Grant Date -
May 14, 2015
app pub date -
Jan 21, 2015
filing date -
Jul 24, 2012
priority date (Note) -
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Abstract
An exhaust gas purification apparatus includes: a reduction catalyst converter that reduces and purifies nitrogen oxides in exhaust gas; a tank that stores a liquid reducing agent or precursor thereof; and an injection nozzle that injects the liquid reducing agent or precursor thereof stored in the tank on an exhaust gas upstream side of the reduction catalyst converter. Some of the exhaust gas flowing through an exhaust pipe is diverted to the tank by a bypass pipe, to cause an exchange of heat between the diverted exhaust gas and the liquid reducing agent or precursor thereof stored in the tank, thereby thawing the liquid reducing agent or precursor thereof frozen in the tank.
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