Intake Air Temperature

[Bruce Plecan]

Oww, new buzz word.
This thermal slew rate changes by part number.
Like some CTS exchange just fine with some IAT, but the CTS are way slower,
changing in response to temp..
Sneezy


| I've done a little temp measurement for a DAQ project I know instantaneous
| is not a reality. I guess a better question would be "How many degrees per
| second do you need the sensor to change?" Lets call it "Thermal slew rate"
| :)
|
| I was using a GM MAT sensor with a heat gun and getting 40-50 degrees per
| second. If that helps any. Unfortunately I don't have a GM part number for
| you guys...
|
| Charles Brooks
|
| -----Original Message-----
| From: Ord Millar <ord at aei.ca>
| To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
| Date: Sunday, May 30, 1999 8:37 PM
| Subject: Re: Intake Air Temperature
|
|
| >I recently did a lot of worth with a temperature sensor in liquids - and
a
| >sensor in flowing liquid has a time constant of 5 seconds or so (time to
| >reach 90% of the new value).  The TC for most sheathed  temperature
sensors
| >in air is 30-90 seconds.  The problem is that dry air has low heat
capacity
| >compared to solids or liquids, and gases are poor conductors of heat.
| >
|
|