GenBoard/UnderDevelopment/AlphaN (2006-11-23 19:21:08)

Developer page for AlphaN

In the 2004.Nov.firmware (without the patch below applied) the base fueling algorithm options are

are supported, configurable in one bit. (The only reason for having it this way in one bit was compatibility with MegaManual and MegaTune protocol)

A patch applied at some point enables these new modes:

Note that if both MAP and TPS sensors are wired and configured correctly, either mode will work, but all will result in different VE (j) table and some will be harder to tune.

The patch works like this:

Load can be TPS / TPS .. MAP / MAP

multuplication with load

New tests here. MembersPage/SamuelLindkvist/AlphaN

When OK, update AlphaN and GenBoard/Manual.


More details

From fuelcalc.c the code is simpler than the blabla explanation:\nÿ1ÿ

remember tps_or_kpa is the TPS / MAP blend as determined by hybrid_rpm_a and hybrid_rpm_m

Thumb rule


Emils notes:

Checked how another system works, will try to write down some info here..


For a system whith the MAP hose connected before the throttle butterfly this could be one way to do it.

Note that all NA alpha-N cars need baro correction, the 'baro pressure' is often measured in the plenum before the blades to be able to compensate for badly sized air filters and ram air effect in addition to barometric compensation. This is one reason that both Lambda and ignition should be looked up from the TPS reading until pressure >110kPa.


See also