| 摘要 |
An instrument that directly measures a flow rate and air-fuel ratio of exhaust gas, and from the flow rate and air-fuel ratio of the exhaust gas, calculates fuel consumption measures the fuel consumption at high response speed and with high accuracy. The instrument is provided with: an ultrasonic flowmater (2) that measures a flow rate QEX of exhaust gas flowing through an exhaust gas flow path R; and an arithmetic unit (4) that calculates fuel consumption Fe of an engine with use of the exhaust gas flow rate QEX obtained by the ultrasonic flowmater (2) and an air-fuel ratio AFR obtained by an air-fuel ratio sensor (3) that measures the air-fuel ratio AFR of the exhaust gas flowing through the exhaust gas flow path R. FIG. 2 |
