Patent ID: 8789406

Claim:
An exhaust gas sampling and analysis system comprising a main flow channel whose proximal end is connected to an introduction port configured to introduce an exhaust gas, a first suction pump connected to the main flow channel configured to introduce the exhaust gas into the main flow channel, a flow restriction mechanism arranged on the main flow channel, a measurement flow channel that extends from the main flow channel in the downstream of the flow restriction mechanism and that samples and circulates the exhaust gas flowing in the main flow channel, an analysis device that is arranged on the measurement flow channel and that analyzes the sampled exhaust gas, a compensation flow channel that extends from the main flow channel in the downstream of a point from which the measurement flow channel extends and that supplies the main flow channel with a compensation gas, and a flow rate adjustment mechanism that is arranged on the compensation flow channel and that adjusts a flow rate of the compensation gas to be supplied to the main flow channel, wherein the flow restriction mechanism and the first suction pump depressurizes the pressure of the exhaust gas that passes through the flow restriction mechanism, and the flow rate adjustment mechanism adjusts the flow rate of the compensation gas supplied to the main flow channel so as to make the pressure of the exhaust gas at the point from which the measurement flow channel extends at a predetermined value.