Method and apparatus for separating a partial flow from a...

G - Physics – 01 – M

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G01M 15/00 (2006.01) G01M 15/10 (2006.01) G01N 1/22 (2006.01) G01N 1/24 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2284479

Method and apparatus (1) for separating, by means of a probe, a partial flow from a flow of gases coming from an exhaust pipe (8) of, for instance, an engine such as a diesel engine for a vehicle (9), the exhaust pipe being connected, by means of a sealingly connectable conduit (4), to a chamber formed by a number of walls, which chamber is surrounded by a housing (2) and communicates, by at least one wall passage, with a space defined between the housing and the chamber walls in which, by extraction means (3, 5, 6) and via optionally closable suction openings, an extraction flow to a remote location is generated, to which extraction flow the flow of gases coming from the exhaust pipe and fed to the chamber via the conduit, and the partial flow separated via the probe, are added.

Ce procédé et ce dispositif (1) servent à séparer, au moyen d'une sonde, un flux partiel à partir d'un écoulement de gaz provenant d'un tuyau d'échappement (9) d'un moteur, par exemple, un moteur Diesel d'un véhicule (9), le tuyau d'échappement étant relié au moyen d'une conduite de raccordement étanche (4) à une chambre délimitée par un certain nombre de parois, entourée par un carter (2) et communiquant, par au moins un passage ménagé à travers une paroi, avec un espace défini entre le carter et les parois de la chambre. Dans cet espace, grâce à des moyens d'extraction (3, 5, 6) et via des ouvertures d'aspiration pouvant être éventuellement fermées, un écoulement d'extraction est produit vers un emplacement à distance, écoulement auquel sont ajoutés l'écoulement de gaz provenant du tuyau d'échappement et dirigé dans la chambre via la conduite, et l'écoulement partiel séparé au moyen de la sonde.

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