Nira i7x - Variables in NIRA rk

© 2005-2016 Nira Control AB 115
6.10.3 Variables in NIRA rk
Variable Name
Type
Description
Vh Tc Action Base
Table
This is the base matrix for
the traction control.
The table value inputs are
the percentage of which
the engine cuts the ignition
as a function of engine rpm
and measured wheel slip.
A value of 0 means no
ignition cut is done and a
value of 100 would cut the
ignition completely.
This is a good map to start
calibrating first and to start
off with relatively small
table values (around 5%)
and evaluate for straight
line accelerations.
Overall slightly higher
values should be used
when wheel slip is high
and/or engine rpm is high.
Vh Tc Curve Comp Fac
Table
Multiplier for spin
calculation. The table
values are a function of the
Curve index (which
basically denotes the
degree of cornering) and
the rolling average speed.
100% is no correction and
a larger value would
activate more traction
control for a given Curve
index and rolling speed.
Vh Tc Curve Corr
Speed
Table
Spin correction based on
vehicle speed
Vh Tc Spin Der Fac
Table
Multiplier for spin derivate.
This has to do with how
fast traction is being lost. If
traction is being lost