FUEL CONSUMPTION MEASURING INSTRUMENT

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 flowmeter 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 flowmeter 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.

主权项

1. A fuel consumption measuring instrument that measures fuel consumption of an engine, the fuel consumption measuring instrument comprising:
an ultrasonic flowmeter that is provided in an exhaust gas flow path through which exhaust gas emitted from the engine flows, and measures a flow rate of the exhaust gas flowing through the exhaust gas flow path; and an arithmetic unit that is configured to calculate the fuel consumption of the engine with use of the exhaust gas flow rate obtained by the ultrasonic flowmeter, and an air-fuel ratio obtained by an air-fuel ratio sensor that is provided in the exhaust gas flow path and measures the air-fuel ratio of the exhaust gas flowing through the exhaust gas flow path.