Patent ID: 9568411
Date: 2017-02-14
CPC Classifications: G01M,G01N

Claim:
1. An exhaust gas analysis system comprising: a particle concentration measurement device that measures concentration of particles contained in exhaust gas from an exhaust pipe that is connected to an internal combustion engine; a sampling cooling pipe that has an exhaust gas inlet to introduce the exhaust gas and an exhaust gas outlet connected to the particle concentration measurement device such that the exhaust gas flows through the sampling cooling pipe and enters the particle concentration measurement device via the exhaust gas outlet to guide the introduced exhaust gas; a temperature sensor that detects temperature of the exhaust gas flowing into the exhaust gas inlet; and a calculation device that uses a relational expression or relational table between the temperature of the exhaust gas and particle concentration at the exhaust gas inlet and the temperature of the exhaust gas and the particle concentration at the exhaust gas outlet, and from the detected temperature by the temperature sensor and the temperature of the exhaust gas introduced into the particle concentration measurement device, corrects the particle concentration measured by the particle concentration measurement device while the exhaust gas is flowing into the exhaust gas inlet and calculates the particle concentration of the exhaust gas flowing into the exhaust gas inlet.