US 12,410,738 B2
Exhaust gas purification apparatus and construction machinery including the same
Rin Hyun, Seoul (KR); Dong Young Jin, Seo-gu (KR); and Beomjun Kang, Seoul (KR)
Assigned to HD HYUNDAI INFRACORE CO., LTD., Incheon (KR)
Filed by HD Hyundai Infracore Co., Ltd., Incheon (KR)
Filed on Nov. 17, 2023, as Appl. No. 18/512,249.
Claims priority of application No. 10-2022-0156173 (KR), filed on Nov. 21, 2022.
Prior Publication US 2024/0167407 A1, May 23, 2024
Int. Cl. F01N 3/035 (2006.01); E02F 9/08 (2006.01); F01N 3/021 (2006.01); F01N 3/04 (2006.01); F01N 3/20 (2006.01); F01N 13/00 (2010.01); F01N 13/18 (2010.01)
CPC F01N 3/035 (2013.01) [E02F 9/0858 (2013.01); F01N 3/021 (2013.01); F01N 3/2066 (2013.01); F01N 13/0097 (2014.06); E02F 9/0891 (2013.01); F01N 3/04 (2013.01); F01N 13/017 (2014.06); F01N 13/1888 (2013.01); F01N 2330/38 (2013.01); F01N 2560/00 (2013.01); F01N 2570/14 (2013.01); F01N 2590/08 (2013.01); F01N 2610/02 (2013.01); F01N 2610/11 (2013.01); F01N 2610/1406 (2013.01); F01N 2610/1453 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An exhaust gas purification apparatus for purifying exhaust gas emitted from an engine and discharges the exhaust gas to an outside, the apparatus comprising:
a body formed with an opening area in which one area is opened;
an intake part disposed on a first side of the body and having an inlet through which the exhaust gas is introduced;
a body cover capable of covering the opening area;
a filter disposed inside the body and capable of entry and exit through the opening area, wherein the filter is positioned with a portion of an outer peripheral surface facing an inner peripheral surface of the body cover;
a selective reduction catalyst disposed inside the body to reduce nitrogen oxides contained in exhaust gas passing through the filter, having a first catalyst disposed in parallel to the filter in the body and disposed to be relatively closer to the inlet than the filter and a second catalyst disposed in parallel to the first catalyst in the body; and
a discharge part disposed on a second side of the body and having an outlet through which exhaust gas which is branched after the pass filter and passes through the first catalyst and the second catalyst is discharged, wherein the outlet is disposed relatively higher on the body than the inlet,
wherein the intake part further comprises:
a guide area formed on one side of the body with an outwardly protruding portion, and elongated in one direction of the body so that the exhaust gas flowing from the inlet is directed to the filter.