In-vehicle exhaust gas analysis system, inspection system for in-vehicle exhaust gas analysis system, inspection method for in-vehicle exhaust gas analysis system, and inspection program

An inspection method for an in-vehicle exhaust gas analysis system that includes a flowmeter, including a mounting tube to be externally attached to an exhaust pipe of a vehicle, to measure a flow rate of exhaust gas discharged from the vehicle, and an exhaust gas analyzer to analyze a concentration of a measurement target component contained in the exhaust gas and to be supplied with a standard gas containing a predetermined component that is a component contained in the exhaust gas, the inspection method comprising:

• supplying a standard gas to the flowmeter and the exhaust gas analyzer via a gas supply port of a standard gas mechanism such that atmospheric air from around the gas supply port is permitted to inflow with the standard gas;
• supplying the standard gas to the mounting tube in a state in which the mounting tube is not attached to the exhaust pipe of the vehicle via a gas supply tube;
• calculating a detected mass of the predetermined component supplied to the in-vehicle exhaust gas analysis system by using a flow rate obtained by the flowmeter and a concentration of the predetermined component obtained by the exhaust gas analyzer;
• acquiring a supply mass of the predetermined component supplied to the in-vehicle exhaust gas analysis system;
• and
• comparing the detected mass and the supply mass, wherein the predetermined component is a component contained in the exhaust gas.

An in-vehicle exhaust gas analysis system comprising:

• a flowmeter, including a mounting tube to be externally attached to an exhaust pipe of a vehicle, configured to measure a flow rate of exhaust gas discharged from the vehicle;
• an exhaust gas analyzer configured to analyze a concentration of a measurement target component contained in the exhaust gas, and to be supplied with a standard gas containing a predetermined component that is a component contained in the exhaust gas;
• a standard gas supply mechanism including a gas supply port configured to supply the standard gas to the flowmeter and the exhaust gas analyzer, and a gas supply tube configured to supply the standard gas to the mounting tube in a state in which the mounting tube is not attached to the exhaust pipe of the vehicle, wherein the standard gas supply mechanism is configured to permit an inflow of atmospheric air from around the gas supply port;
• and
• one or more processors programmed to
• calculate a detected mass of the predetermined component by using a flow rate obtained by the flowmeter and a concentration of the predetermined component obtained by the exhaust gas analyzer,
• acquire a supply mass of the predetermined component supplied to the flowmeter and the exhaust gas analyzer, and
• compare the detected mass and the supply mass.