Air Mass - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Air Mass
Posted by Mr. Science (more from Mr. Science) on Tue, 1 Oct 2002 08:38:32
In Reply to: T7 Torque, BobS, Mon, 30 Sep 2002 23:10:30
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The T7 ECU has a preprogrammed relation between the air mass flow into the engine and how much torque that air mass flow should produce.
"The engine torque curve is stored in the control module memory. It specifies the maximum engine torque at various engine speeds. Engine torque is directly proportional to air mass/combustion. The unit in the engine torque curve, Nm, is converted to mg air/combustion. The value taken from the curve is the maximum air mass/combustion value the engine variant allows."
A feedback loop measures actual air mass combustion, compares it to the desired value, and adjusts accordingly.
I'm still trying to learn more details about how exactly the air mass sensors work in terms of taking into account air density, temperature, relative humidity, etc.
'Roo
posted by 12.13.238...
Posts in this Thread:
- T7 Torque, BobS, Mon, 30 Sep 2002 23:10:30
- Air Mass, Mr. Science, Tue, 1 Oct 2002 08:38:32 <-- Viewing This Message
- Re: Air Mass, Dean, Tue, 1 Oct 2002 13:37:16
- Link, Mr. Science, Tue, 1 Oct 2002 08:39:51
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