Exhaust gas analysis system and exhaust gas leak detecting method

Abstract

An exhaust gas analysis system of the present invention includes: an exhaust gas collecting device for collecting exhaust gas from an exhaust pipe; and exhaust gas analysis equipment for analyzing the exhaust gas. The exhaust gas collecting device includes: an exhaust gas collecting part which is provided at an exhaust gas discharge port of the exhaust pipe, having an exhaust gas collecting port that is larger than the exhaust gas discharge port, for collecting air around the exhaust gas discharge port together with the exhaust gas; a main flow passage which is connected to the exhaust gas collecting part and in which the exhaust gas and the air collected from the exhaust gas collecting part flow; and an exhaust gas detecting mechanism for continuously detecting a predetermined component contained in the exhaust gas in the vicinity of the exhaust gas collecting port in the exhaust gas collecting part.

Description

technical field [0001] The present invention relates to an exhaust gas analysis system and an exhaust gas sampling device for sampling exhaust gas discharged from an internal combustion engine, or an exhaust gas leakage detection method for detecting leakage of exhaust gas discharged from an internal combustion engine. Background technique [0002] As a device for measuring the concentration of substances contained in exhaust gas of an internal combustion engine, there is, for example, an exhaust gas analysis device having an open exhaust gas sampling unit (hereinafter referred to as an open sampling unit) disclosed in Patent Document 1. [0003] The exhaust gas analysis device includes: an open type sampling part that sucks exhaust gas discharged from an exhaust pipe of a vehicle, and sucks the atmosphere located around the exhaust pipe; A mixed gas obtained by mixing the exhaust gas and the air flows through the flow channel; and a measuring unit is provided on the flow ch...

AI Technical Summary

Problems solved by technology

However, if the exhaust pipe is inserted too much into the open-type sampling part, the test conditions will change due to the excessive load applied to the internal combustion engine, making it difficult to perform accurate exhaust gas analysis

[0010] On the other hand, if there is too much separation between the open-type exhaust gas sampling part and the exhaust pipe, there is a problem of exhaust gas leaking from between the open-type exhaust gas sampling part and the exhaust pipe, which cannot be a solution to the problem

Images