| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure without a consumption calibration gas by providing a step analyzing each component of an undiluted exhaust gas and a step analyzing a predetermined component of a diluted exhaust gas. SOLUTION: For example, mass discharge measurement for a vehicle 12 is performed by a gas analyzer 28 measuring concentration of each component, and preferably a gas analyzer 32 of an oxygen sensor. An undiluted exhaust gas is measured by the analyzer 28, and in a mixed gas of an exhaust gas and diluted air drawn into by a blower 24, the flow rate thereof is measured by a mass flow meter 36 and the oxygen concentration thereof is measured by an analyzer 32. For example, by using these data and oxygen concentration in the atmosphere obtained by a predetermined method, mass discharge of each component in the exhaust gas is determined by predetermined computing with a computer 40. For example, compensation for influence caused by each component in an exhaust gas to the analyzer 32 of a zirconium oxide oxygen sensor, is performed by a predetermined compensation algorithm. |
