Spinning the tires not only makes the
car harder to drive, but it also causes higher tire temps and
excessive tire wear.
Lifting off the throttle or
counter steering to correct for this 5% mistake,
not only upsets the rhythm, it slows the car down!
Typically, if a driver makes a 5%
mistake with the throttle, he/she has to correct 20-25% to fix
But if the tire slip is detected within one cylinder worth of crank rotation, as the
Davis Technologies systems do, then a small reduction in power
can reduce or stop the tire slip.
The Non Self-Learning systems, such as our TMS-750,
periodically compare the rate of acceleration of the crankshaft
to an Adjustable Fixed Rate (AFR), known as Threshold.
If the Engine RPM rate of
change is in excess of that Threshold, then a correction is
made; therefore, reducing the slip.
The comparison is made every cylinder (1/4 of a turn of
the crank shaft).
for spikes in RPM that are caused by wheel slip. If these spikes are large
enough, then a correction is made, reducing the slip.
By adjusting the Threshold, the driver can tune the system to the desired
systems, such as our TMS-750-SL,
TMS-5500-SL, and TMS-9500-SL
series, compare the rate of acceleration of the crankshaft to
a calculated threshold value that is constantly updated based on
the average of the previous measurements.
This update occurs on every crankshaft revolution.
So, if the last 1/4 of a turn of the
crankshaft (one cylinder) is faster than the average of the last
full revolution (4 cylinders), then a slip is detected.
Through this very advanced
process, the system constantly
accounts for track conditions,
tire condition, even driving style to constantly update the
These settings are updated as many as 200 times a second to keep the unit
calibrated to exactly the right settings regardless of changing conditions.
Basically, the systems learn the average rate of acceleration of
the crankshaft, and if there is a sudden spike in RPM above that
rate, then a correction is made.
This allows the system
to adjust to the Correct settings even if one corner has more grip
than another, or even one groove to another.
The user does have an adjustment referred to as “Mode” that sets the
overall sensitivity of the system to make a correction based the
extent of the tire slip. By adjusting the Mode, the
driver can tune the system to the desired "feel".
The speed and learning capabilities of our systems is what makes Davis
Technologies the best racing traction control on the market
today. Allowing you to focus on
chassis set-up, and not be distracted by constantly having to
adjust your traction control settings, as with systems that work
on a percentage of slip between the front and rear wheels.