Sensor Questions?

[Clinton L. Corbin]

>At 10:42 AM 2/5/96 -0800, you wrote:
>>
>>Clint writes:
>>
>>>Quick question: what exactly is going to cause this "sudden increase in the
>>>amount of required air" that is going to draw a vacuum?
>>
>>I don't know all of the physics behind it, but it is related to the velocity 
>>and inertia of the air, length of intake track, etc.  The previous post 
>>about "acceleration enrichment strategies that are a function of throttle 
>>transients" was correct and is how the computer compensates for this 
>>condition.
>>
>>>Just remember that a MAF system also has to be calibrated to the engine it 
>>is
>>>on.  The MAF give out a voltage (or frequency) depending on how much air is
>>>going through it.  It does not tell you "currently, there is x Kg/sec 
>>flowing
>>>through me".
>>
>>Excuse me?  That's exactly what the MAF *does* tell you:  mass air flow 
>>(kg/hr) flowing through the meter and into the engine.  That's the beauty of 
>>the MAF.  Pressure, temperature, and density variations do not have a 
>>(large) effect on the accuracy.
>>
>>Bryan Zublin
>>bzublin at gi.com
>>
>>
 >
>I think what Clint is saying is that the MAF produces a frequency or voltage
>PROPORTIONAL to the mass of air currently passing through it, rather than a
>binary or BCD number showing exactly what the current flow is.....its all a
>matter of the way he phrased the statement. With any 2-wire device, it's
>usually the user's responsibility to decode the data into some meaningful
>result.

Thanks, that was what I was TRYING (unsucessfully I might add!) to say.  When I
reread that sentence, it took me a few minutes to figure it out again.  Sorry
for the confusing English.  

Clint
ccorbin at intel7.intel.com