| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow rate measurement device capable of shortening measurement time when measuring a flow rate of a fuel injected from a fuel injection valve, while switching measurement conditions.SOLUTION: A flow rate measurement device 100 includes: a high pressure pump 11; a common rail 12; a measurement unit 20 for measuring an injection amount from an injector 40; and a control unit 30 for controlling the high pressure pump 11 and the injector 40 on the basis of a plurality of measurement conditions including valve opening time TQ different from each other. The control unit 30 calculates an amount of change &Dgr;I of a command value with respect to the high pressure pump 11 for generating flow amount change corresponding to a predicted amount of change &Dgr;Q of an injection amount of the injector 40 at the time of measurement condition switch in a discharge amount of the high pressure pump 11. Also, at the time of measurement condition switch, a command value I' after correction which is corrected by the amount of change &Dgr;I is imparted to the high pressure pump 11. |
