| 摘要 |
<p>An apparatus (10) for diluting exhaust gas emissions by using a small fraction of a continuously extracted exhaust sample (12) combined with a pollutant-free diluent (36) through a system of devices such as critical flow orifices (22, 48) at a predetermined and precisely controlled flow ratio. A small quantity of gas is extracted from the diluted exhaust gas available with the purified air or nitrogen to produce a mixture having a dew point below ambient air temperature and satisfying the flow requirements of an analysis system.</p> |
