Autronica SM4, Руководство пользователя

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SM4 Manual by MRM-Racing V3.0
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Tuning Guide
Setting up the A/F table
Here is the AF table with some colored fields to show how it works. Below is how the
different zones work with the engines fuelling. In this example we use a modern turbo
engine.
Startup fuelling zone:
This zone determines how rich the engine is fuelled when trying to start.
Idle zone:
This is where the engine idles. Should be fuelled so the engine idles nice and calm, and
that it does not heat up to much, and to avoid sot buildup.
Idle rpm's acceleration zone:
This zone determines the fuelling if we where on idle, but start to accelerate from idle.
Spool up transient power zone:
This zone is a bit tricky. The engine will in this zone spool up the turbo very quickly. That
leads to fuel starvation. Some of the starvation can be handles by TPS acceleration
enrichment. On the SM4, there is much more sophisticated methods to counter the
starvation, with rpm rate and boost rate enrichment tables, and with chip version 1.09 we
also have the transient enrichment system, wich completely solve the problems with
spool up starvation.
We set the fuelling in this zone to assure that the engine will not come out of the spoolup
with a debt in fuel that cause starvation all the way up in the full power zone.
Since the engine will not be in this area for so very long, it does not matter much if we
are a bit on the rich here. It only helps the engine when it comes into the full power zone.