Patent ID: 8820138
Filing Date: 2014-09-02
Classification: G01M,G01N

Abstract:
1. A system for taking an exhaust gas sample from an internal combustion engine, the system comprising: a first exhaust gas channel fluidically connected to a first exhaust gas source for a first exhaust gas via a first exhaust gas inlet; a first air channel with a first air filter disposed therein, the first air channel being configured to suck in ambient air; a first mixing zone in which the first exhaust gas channel meets the first air channel, the first mixing zone being configured to mix the first exhaust gas with the ambient air so as to obtain a first exhaust gas/air mixture; a second exhaust gas channel fluidically connected to a second exhaust gas source for a second exhaust gas via a second exhaust gas inlet; a second mixing zone in which the second exhaust gas channel meets a second air channel configured to suck in ambient air, the second mixing zone being configured to mix the second exhaust gas with the ambient air so as to obtain a second exhaust gas/air mixture; a dilution tunnel configured to have the first exhaust gas/air mixture or the second exhaust gas/air mixture flow therethrough; at least one sampling probe configured to take particle samples arranged in the dilution tunnel; a pump configured to convey the first exhaust gas/air mixture or the second exhaust gas/air mixture; and a control device and a measurement device configured to respectively control and measure mass flows; wherein the first exhaust gas/air mixture and the second exhaust gas/air mixture are each configured to flow into the dilution tunnel and to the at least one sampling probe, wherein, either the first exhaust gas/air mixture or the second exhaust gas/air mixture flow into the dilution tunnel and to the at least one sampling probe at any time.