| 摘要 |
In order to secure accuracy the dilution-ratio of diluted exhaust-gas while making it possible accurately to measure the mass of particulate matter, an exhaust-gas measurement system (100) that has a diluted exhaust-gas flow path (L3) through which the diluted exhaust-gas produced by diluting particulate matter in the exhaust-gas by a filter (F) provided in the flow path (L3) for measurement, includes a bypass flow path (L4) that branches from the upstream side of the filter (F) and merges with the downstream side of the filter (F) and a separation flow-rate control part (30) that, while flowing the diluted exhaust-gas through the filter (F), controls the separation flow-rate of the diluted exhaust-gas flowing through the bypass flow path (L4). A condition on the flow-rate of the diluted exhaust-gas to be flowed through the filter (F) is determined according to a preset test condition; the separation flow-rate control part obtains test condition data indicating the test condition and based on the flow-rate condition, controls the separation flow-rate. |
