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Davis Technologies utilizes a very advanced, Patented method to detect wheel slip. These systems monitor the rate of acceleration of the engine (typical), and if the rate exceeds a pre-determined threshold, the system retards engine timing to reduce the power delivered to the rear wheels. These systems monitor the acceleration of the engine as many as 100 times a second. One advantage of this type of system is the lack of external sensors, such as wheel speed or ground speed sensors. Our Self Learning feature allows the system to determine the allowable acceleration threshold automatically. This greatly enhances the performance of the system in changing track conditions. This feature is very useful in longer races, and anytime the track has changing grip conditions around the circuit, such as different radius corners or differences in the banking. Another advantage of these systems is that they are actually able to detect wheel slip better than most wheel speed sensor based systems. The reason for this is that our systems monitor the rotation of the crankshaft through the distributor signal. The distributor fires every 90 degrees of crank rotation (V8), and w/ a 1:1 top gear you can measure tire rotation within 1/4 of a turn. Now factor in a 5:1 final drive (rear end) ratio and tire rotation can be measured within 1/20 of a turn (that is about 4-5 inches on most tires). The fact that the engine is turning much faster than the wheels, amplifies the slip at the crankshaft, making our systems much more sensitive than the typical wheel speed systems available today. Put simply, if the tires slip the distributor revs. The only reason for the sudden increases in revs at the distributor, other than a bad clutch or broken driveline, is wheel spin. Typically, sensor based systems measure tire rotation no more than every 1/4 of a turn. The front and rear are compared to each other to check for slip. With a margin of error of 1/4 of a turn at each wheel, it may take as much as 1/2 of a turn of tire slip for the system to react. If a tire is allowed to slip a half a turn before a correction is made, it is very hard to stop the slip. A system that uses a preset percentage of slip, between the rear wheel speed to front wheel (or ground) speed, cannot compensate for these changing conditions that are inherent in all types of racing. Sometimes the driver needs to "slip" the tires through one corner more than another, this is impossible if the system only allows a certain percentage of speed difference between the front and rear wheels. This is the feature that puts Davis Technologies at the head of the field in traction control. No other manufacture has systems as advanced as Davis Technologies.
------------------------------------------------------------------------------------------- Click Here To Watch Video Of Davis Technologies Traction Control In Action
Here are some Pictures we caught w/ a high speed camera at the Cleveland Test- You can see the tire spinning badly in the first picture, the Traction Control is turned off. In the next 3 consecutive
frames the Traction Control is On (different lap than first pic) you can see the tire start
to spin, kicking up a little dust. The Traction Control
kicked in (notice it only slipped for about 5 inches of tire
rotation) and the tire stops spinning and the side wall begins
to wrinkle as the tire hooks up. Davis Technologies
Traction Control is FAST !!
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