Flow rate detector for vehicle engines, has gain compensation unit that amplifies signal from flow detector with alternating current gain in frequency range greater than minimum pulsating frequency of fluid

摘要

A flow detector outputs a signal based on flow rate of a fluid that utilizes heat transfer phenomenon. A gain compensation unit amplifies the signal from the flow detector with an alternating current gain larger than direct current gain at zero frequency, in a frequency range higher than minimum pulsating frequency of the fluid.