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1. (WO2017154688) OPEN EMISSION ANALYSIS METHOD AND DEVICE

Pub. No.:    WO/2017/154688    International Application No.:    PCT/JP2017/008020
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: G01N 1/00
F01N 3/00
G01N 1/22
Applicants: HONDA MOTOR CO.,LTD.
本田技研工業株式会社
Inventors: FUJII Satoshi
藤井 聡
OKONOGI Takuma
小此木 卓馬
NIHEI Hideo
仁平 秀男
Title: OPEN EMISSION ANALYSIS METHOD AND DEVICE
Abstract:
[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.