Flow detector

Abstract

Abstract PURPOSE: To obtain accurate mean flow rate and make the controlling of engines, etc. accurate by using the hot wire of the fineness until at least pulsating components appear in waveform and below this and using the correction circuit of the pulsating time making ingenious use of said fluctuation components. CONSTITUTION: The output waveform A relating to mass flow is obtained by using the hot wire 1 provided to a suction line and a hot wire control circuit 3 controlled by a sensor 2 for suction temperature correction. The voltages B, C based on the upper limit value and lower limit value by the pulsation of this output waveform are detected by a fluctuation detecting circuit 4 and the differential voltage thereof D is outputted. This differential voltage D is inputted to an output correction circuit 5, which then adds 0.25% of this differential voltage D, as a correction voltage E, to the output voltage A and outputs the same as a correction output F. This correction output F controls an engine control circuit 6, by the output whereof an injector 7 or the like may be accurately controlled. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Hatsuo Nagaishi
• 👤 Toyoaki Nakagawa

Bibliographic Details