Specs for MAF
#1
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I'm looking for the specs for the internals components of the MAF electronics. I know the pin outs and how the mechanics work but would like to know the graphical interaction between flow and resistance, resistors etc are mapped. How it is calibrated etc. I'm not looking to rebuild them but want to get a dang good idea how it works internally in relation to real time data.
#2
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Oh we got some funny guys here LOL, thanks for the PM's.
#3
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Hot wires, rushing air, resistance changes, fluctuating voltages, output translation, all combined with various other sensorary input resulting in a signal transmitted to the injectors timed to throw some fuel into the combustion chamber at the same time piston is nearing TDC, valves are closed and the same time spark plug fires.
Time seems to be a common factor suggesting that an Oven Controlled Crystal Oscillator (OCXO) could be utilized to further enhance the alogorithmic metric.
Hope this helps
Time seems to be a common factor suggesting that an Oven Controlled Crystal Oscillator (OCXO) could be utilized to further enhance the alogorithmic metric.
Hope this helps
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Last edited by the flyin' scotsman; 01-13-2014 at 01:16 AM.
#4
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MAF operation doesn't look at the changing resistance of the wire. Instead, the wire is heated to a certain temperature, temperature measured by a thermistor. The amount of current needed to maintain wire temperature is what changes as changes in mass air flow affect how much heat is carried from the wire. So the resistance of the wire is critical, as is the thermistor welded to the wire.
#6
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#8
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As Ken has shown, the output voltage is measured from a varying current/vs air mass flowing through the sensor assembly. Uses a bridge circuit to give a compensated output.
Output is volts versus kg per sec air mass.
The response time of the MAF to changes of airflow is very fast, 1-3mS.
Output is volts versus kg per sec air mass.
The response time of the MAF to changes of airflow is very fast, 1-3mS.