| 摘要 |
The present invention is one that is, in an exhaust gas analyzing apparatus used together with a CVS mechanism, adapted to be able to make an analysis with high accuracy, and an analyzing mechanism is provided with: a target component concentration meter that measures a moisture-influenced concentration related value that is a value related to concentration of a measuring target component in a state of being influenced by moisture; and a moisture concentration meter that measures a moisture concentration related value that is a value related to concentration of the moisture, and adapted to, on the basis of the moisture concentration related value, eliminate the influence of the moisture from the moisture-influenced concentration related value to calculate each of the first concentration related value and the second concentration related value. |
| 主权项 |
1. An exhaust gas analyzing apparatus that is used together with a CVS mechanism that is configured to sample a total amount of exhaust gas emitted from an internal combustion engine, produce mixed gas by mixing diluent gas with the exhaust gas of which the total amount is sampled, and make a flow rate of the mixed gas constant, the exhaust gas analyzing apparatus comprising:
a mixed gas containing bag that samples and contains the mixed gas; a diluent gas containing bag that samples and contains the diluent gas; and an analyzing mechanism including a target component concentration meter that measures a first moisture-influenced concentration related value that is a value related to concentration of a measuring target component contained in the mixed gas, and that measures a second moisture-influenced concentration related value that is a value related to concentration of the measuring target component contained in the diluent gas, a moisture concentration meter that measures a first moisture concentration related value that is a value related to concentration of moisture associated with the mixed gas, and that measures a second moisture concentration related value that is a value related to concentration of moisture associated with the diluent gas, and, an arithmetic unit that calculates a first actual concentration related mixed gas value from the first moisture-influenced concentration related value and the first moisture concentration related value, that calculates a second actual concentration related diluent value from the second moisture-influenced concentration related value and the second moisture concentration related value, and that calculates a corrected value related to concentration of the measuring target component contained in the exhaust gas by subtracting the second actual concentration related diluent value from the first actual concentration related mixed gas value, wherein the corrected value related to concentration of the measuring target component contained in the exhaust gas is used for fuel consumption ratio measurement or adjustment of the diluent gas. |
