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|1. (WO2017154688) OPEN EMISSION ANALYSIS METHOD AND DEVICE|
|Applicants:||HONDA MOTOR CO.,LTD.
|Title:||OPEN EMISSION ANALYSIS METHOD AND DEVICE|
[Problem] To simply and reliably prevent the leak of an exhaust gas when carrying out an open emission analysis of the exhaust gas. [Solution] A filter 40 that is made from sponge and is air-permeable and elastic is interposed between a collection port 11 and an exhaust port 7a of an exhaust gas collection unit 10, such that the gap formed between the collection port 11 and the exhaust port 7a is closed. In such a state, when the interior of the exhaust gas collection unit 10 suctions at a fixed flow-rate, the exhaust gas and outside air surrounding the exhaust port 7a is taken into the interior of the exhaust gas collection unit 10 from the collection port 11. At such time, the flow-rate of outside air taken in via the filter 40 is restrained by the ventilation resistance of the filter 40, and therefore the total flow-rate of the exhaust gas and outside air taken into the exhaust gas collection unit 10 is caused to be smaller than the suction flow-rate, such that the exhaust gas is prevented from leaking out.