| 摘要 |
PROBLEM TO BE SOLVED: To provide a dilution device for sampling gas, for example exhaust gas, from an engine or another emission source, and analyzing particles included in the gas. SOLUTION: This dilution device includes an inlet port and an outlet port. The dilution device also includes a first porous conduit defining an internal passage. The first porous conduit has a plurality of pores that communicate between an outside region on the outside of the first porous conduit and the internal passage. The dilution device also includes a second porous conduit disposed around the first porous conduit. The second porous conduit defines a first chamber on the periphery centered at the first porous conduit. The second porous conduit has a plurality of pores that communicate between an outside region on the outside of the second pours conduit and the first chamber. The dilution device further includes a housing disposed on the periphery of the second porous conduit. The housing defines a second chamber on the periphery centered at the second porous conduit. The housing has an inlet port in communication with the second chamber. The first porous conduit includes a port at a first end of the first porous conduit in communication with the second chamber. COPYRIGHT: (C)2008,JPO&INPIT
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