US 12,134,978 B2
Aftertreatment device and engine
Shinsuke Kasazaki, Osaka (JP)
Assigned to YANMAR HOLDINGS CO., LTD., Osaka (JP)
Filed by YANMAR HOLDINGS CO., LTD., Osaka (JP)
Filed on Jul. 13, 2023, as Appl. No. 18/351,627.
Claims priority of application No. 2022-134346 (JP), filed on Aug. 25, 2022.
Prior Publication US 2024/0068386 A1, Feb. 29, 2024
Int. Cl. F01N 3/02 (2006.01); F01N 3/035 (2006.01); F01N 3/20 (2006.01)
CPC F01N 3/035 (2013.01) [F01N 3/2066 (2013.01); F01N 2250/02 (2013.01); F01N 2610/02 (2013.01); F01N 2610/08 (2013.01); F01N 2610/1453 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An aftertreatment device comprising:
a DPF case having an inlet pipe and a bottom surface portion, the inlet pipe being positioned on a rear end side of the bottom surface portion of the DPF case;
an SCR case having an exhaust outlet pipe and a bottom surface portion, the exhaust outlet pipe being positioned on a rear end side of the bottom surface portion of the SCR case;
an exhaust connection pipe that connects the DPF case and the SCR case;
a mixer arranged at an upstream end of the exhaust connection pipe in a flow direction of exhaust gas; and
a urea water injection portion that injects urea water into the mixer.