AIR FLOW RATE MEASURING DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an air flow rate measuring device capable of restraining an operation load, and easily replaceable with a frequency system from a voltage value system while securing measuring accuracy when converted into an air flow rate from a frequency in a frequency system air flow rate measuring device. SOLUTION: Frequency output of an air flowmeter 50 is detected as a period T by a frequency measuring part 32, a detecting result of this period T is converted into a voltage value V by a predefined conversion expression, and the voltage value V is converted into an air flow rate Q.