Mass air flow measurement system and method

A mass air flow measurement method according to the steps of:

• placing an upstream minus downstream temperature air flow sensor in a flow of a gas, wherein the sensor has a sensor time constant;
• receiving an output signal from the sensor responsive to a mass flow amount of the gas that flows past the sensor, wherein when the gas pulses with cycle times approaching and below the sensor time constant, the sensor output lags the flow and on average is below an accurate average of the mass flow amount;
• and
• high pass filtering the sensor output with a high pass filter, wherein the high pass filter has a zero with a time constant substantially equal to the sensor time constant, wherein the high pass filter effectively amplifies high frequency portions of the sensor output signal and compensates for the lag and low average of the sensor output to gas pulses with cycle times approaching and below the sensor time constant, wherein, an output of the high pass filter is, on avenge, substantially equal to the accurate average of the mass flow amount.