Heat generating resistor type air flow measuring device, reverse flow judgment method and error correction method

摘要

The present invention accurately corrects an error of a heat generating resistor type air flow rate measuring apparatus caused by pulsation in an intake pipe in detecting an air flow rate of an internal combustion engine.;For this purpose, a heating resistor is placed in an auxiliary air passage where it is difficult to directly enter the counterflow, and the ratio of the amplitude and the average value is used by using the maximum value, the minimum value, And at the same time corrects the error due to the increase of the net flow.