초록 ▼

The present invention provides an exhaust gas analyzing system utilizing a mini-diluter method in which measurement accuracy of the exhaust gas analyzing system can be evaluated by the system itself. In the exhaust gas analyzing system, a sampling flow path is connected to an exhaust gas flow path t

The present invention provides an exhaust gas analyzing system utilizing a mini-diluter method in which measurement accuracy of the exhaust gas analyzing system can be evaluated by the system itself. In the exhaust gas analyzing system, a sampling flow path is connected to an exhaust gas flow path through which gas exhausted from an engine flows to sample a portion of the exhaust gas. The sampled exhaust gas is diluted with dilution gas introduced through a dilution gas flow path which is connected in parallel to the sampling flow path. A portion of the diluted exhaust gas is stored in a sample bag. The diluted exhaust gas in the sample bag is analyzed in a gas analyzing portion, wherein flow rate of the exhaust gas is measured, trace gas with a known concentration is introduced into the exhaust gas flow path upstream from a connecting point located between the exhaust gas flow path and the sampling flow path while monitoring flow rate of the trace gas, diluted trace gas is analyzed in the gas analyzing portion, and total mass of the trace gas calculated from a result of the analysis is compared with total mass of the introduced trace gas to evaluate measurement itself.

대표청구항 ▼

1. An exhaust gas analyzing system, comprising:a sampling flow path connected to an exhaust gas flow path through which gas exhausted from an engine flows to sample a portion of said exhaust gas; a dilution gas flow path connected in parallel to said sampling flow path, said dilution gas flow path d

1. An exhaust gas analyzing system, comprising:a sampling flow path connected to an exhaust gas flow path through which gas exhausted from an engine flows to sample a portion of said exhaust gas; a dilution gas flow path connected in parallel to said sampling flow path, said dilution gas flow path diluting said sampled exhaust gas with a dilution gas to form a diluted exhaust gas; a sample bag storing a portion of said diluted exhaust gas; a gas analyzing portion analyzing said diluted exhaust gas in said sample bag; wherein flow rate of said exhaust gas is measured; and a trace gas with a known concentration introduced into said exhaust flow path while monitoring flow rate of said trace gas, said trace gas introduced into said exhaust flow, path upstream from a first connecting point, said first connecting point connecting said exhaust gas flow path to said sampling flow path, said trace gas forming diluted trace gas when mixed with said diluted exhaust gas and said dilution gas, said diluted trace gas analyzed in said gas analyzing portion; wherein total mass of said trace gas calculated from a result of said analysis in said gas analyzing portion is compared with total mass of said introduced trace gas to evaluate said analysis of said diluted trace gas in said gas analyzing portion.