| 摘要 |
<p>A vehicle-mountable exhaust gas analyzer (100) is configured to measure concentrations of components such as NOX, CO and CO2 contained in exhaust gas discharged from a vehicle and comprises a drain separator (13) connected to an exhausted duct of the vehicle through an unheated piping (12), wherein the exhaust gas discharged from the vehicle is cooled to a normal temperature by the unheated piping, the moisture contained in the exhausted gas condensates and attaches to inside the unheated piping as liquid moisture, and the liquid moisture is discharged out of the unheated piping through the drain separator; a measuring instrument group (4,5,6) that is configured to measure concentration of the exhaust gas components in a semi-dry state wherein liquid moisture is removed by the drain separator, a dry concentration calculating part (74) that is configured to calculate concentrations of exhaust gas components in a dry state wherein moisture is completely removed, based on the concentration of moisture and the exhaust gas component concentrations obtained by the measuring instrument group; and an actual concentration calculating part (75) that is configured to calculate exhaust gas component concentrations at a time when the exhaust gas is discharged from the vehicle, based on the concentrations of the components in the dry state and a predetermined conversion equation.
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