US 12,480,882 B2
Exhaust gas analysis device, exhaust gas analysis method, and program storage medium for exhaust gas analysis device
Tomohiko Ishizaki, Kyoto (JP); and Tomoshi Yoshimura, Kyoto (JP)
Assigned to HORIBA, LTD., (JP)
Appl. No. 18/029,911
Filed by HORIBA, LTD., Kyoto (JP)
PCT Filed Sep. 22, 2021, PCT No. PCT/JP2021/034823
§ 371(c)(1), (2) Date Apr. 2, 2023,
PCT Pub. No. WO2022/071066, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 2020-167674 (JP), filed on Oct. 2, 2020; and application No. 2020-185255 (JP), filed on Nov. 5, 2020.
Prior Publication US 2023/0366827 A1, Nov. 16, 2023
Int. Cl. G01N 21/76 (2006.01); G01N 1/22 (2006.01); G01N 1/38 (2006.01); G01N 33/00 (2006.01)
CPC G01N 21/766 (2013.01) [G01N 1/2252 (2013.01); G01N 1/38 (2013.01); G01N 33/004 (2013.01); G01N 2001/386 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An exhaust gas analysis device that analyzes exhaust gas generated as a result of fuel being combusted comprising:
a first analyzer that measures a concentration of a component to be measured in the exhaust gas;
a second analyzer that measures a concentration of CO2 in the exhaust gas;
a storage portion that stores a hydrogen/carbon ratio, which is a ratio between hydrogen and carbon composing the fuel, or an input receiving portion that receives an input of the hydrogen/carbon ratio;
a moisture concentration estimating portion that, based on the concentration of CO2 and on the hydrogen/carbon ratio of the fuel, estimates a concentration of moisture in the exhaust gas; and
a correcting portion that, based on the concentration of moisture and a sensitivity coefficient that shows a relationship between the concentration of moisture and a sensitivity of the first analyzer, corrects effects of moisture on the concentration of the component to be measured.