US 12,234,761 B2
Exhaust gas purification device and engine
Tsuyoshi Inoue, Osaka (JP); Daisuke Morimitsu, Osaka (JP); and Kohei Iwamoto, Osaka (JP)
Assigned to YANMAR HOLDINGS CO., LTD., Osaka (JP)
Appl. No. 18/272,988
Filed by Yanmar Holdings Co., Ltd., Osaka (JP)
PCT Filed Dec. 1, 2021, PCT No. PCT/JP2021/044089
§ 371(c)(1), (2) Date Jul. 18, 2023,
PCT Pub. No. WO2022/158130, PCT Pub. Date Jul. 28, 2022.
Claims priority of application No. 2021-006377 (JP), filed on Jan. 19, 2021.
Prior Publication US 2024/0309786 A1, Sep. 19, 2024
Int. Cl. F01N 3/20 (2006.01); F02B 29/04 (2006.01); F02B 37/22 (2006.01); F02M 35/10 (2006.01)
CPC F01N 3/2066 (2013.01) [F02B 29/0406 (2013.01); F02B 37/225 (2013.01); F02M 35/10157 (2013.01); F01N 2610/1453 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An exhaust gas purification device for purifying nitrogen oxides of exhaust gas, the exhaust gas purification device comprising:
a catalyst that is provided in an exhaust passage that is configured to allow an exhaust gas discharged from an engine to flow in a predetermined exhaust direction and promote reduction of the exhaust gas; and
an injection nozzle that is provided in the exhaust passage upstream from the catalyst in the predetermined exhaust direction and is configured to inject a reducing agent for reducing the exhaust gas,
wherein the injection nozzle has:
an injection hole configured to enable injection of the reducing agent toward the catalyst and at a first point in the exhaust passage, and
a discharge hole configured to enable discharge of a cooling medium at least in a direction opposite to the predetermined exhaust direction and at a second point in the exhaust passage upstream from the first point in the predetermined exhaust direction.