Race Logic Traction Control
We have been authorised Race Logic traction control and launch control system installers for many years and continue to be be impressed with these products. We have found that many OEM traction control systems are very intrusive and sometimes even dangerous. Consider the type of OEM traction control system that uses the engine throttle to limit power as a method of traction control (which most typres are), and this system operates just when you need power to avoid a difficult situation. This can be very dangerous!
The Race Logic traction control and launch control system works in a completely different way, by sequentially cutting the fuel injectors or ignition, to a point that provides you with the correct amount of power for the prevailing conditions. The system is completely adjustable making it a vital tool for optimising chassis balance and vehicle performance.
In rear wheel drive cars you can use full throttle through corners with greater confidence that the rear end isn’t going to suddenly break away. In front wheel drive cars, push-on understeer is cured, with the system determining the optimum amount of power to balance the vehicle. For all cars in wet and slippery conditions the vehicle accelerates as fast as grip allows without allowing a loss of control.
Not only does it positively enhance the performance of the vehicle, Racelogic traction and launch control systemalso dramatically reduces the chances of an accident.
The system works by monitoring the speed of all four wheels using the ABS system or specially fitted sensors. When wheel spin is detected the engine power is reduced, by cutting a single injector pulse, until grip is resumed. This occurs in a thousandth of a second, and appears to the driver as a slight misfire with no loss in acceleration.
Maximum acceleration is achieved by limiting the slip between the tyre and the road. The point at which a tyre is just beginning to slip against the road gives the maximum coefficient of friction value.
From the graph on the left it can be seen that the maximum coefficient of friction (µ) occurs at a slip between tyre and road of 10% when dry, and around 5% when wet.
Many factors affect the ideal level of slip, wet / dry conditions, speed of the vehicle, lateral g-force (cornering), tyre compound, tyre pressures etc. Ideally the driver should be able to dial in a base level of slip that takes into account weather and tyres, and the system should adjust automatically for speed of the vehicle and lateral g-force.
When cornering, the system will reduce the amount of slip available, to prevent lateral slip from occurring, and vary this amount depending on the speed of the vehicle. At high speed, low grip situations, this slip should be around 1-2% to maintain forward momentum, and at low speed high grip situations, this can be much higher.
Cutting a single injector pulse
The idea of cutting fuel to an engine sets alarm bells ringing in engine builders, as they all know that running a lean combustion mode will elevate in-cylinder temperatures very rapidly. The denser the air/fuel charge, the more heat the lean burn can generate. Therefore it is vital that a fuel cut system will not cause a lean burn.
Racelogic Traction Control prevents lean burn by removing 100% of the pulsed fuel delivery – essentially the affected cylinder takes a gulp of fresh air; the in-cylinder temperature remains virtually unaffected.
Prolonged fuel cut on one particular cylinder would cause scavenging of the petrol lining the inlet tracts, and when the next full fuel pulse arrived, it would be partially reduced in quantity by the re-wetting of these tracts. RL Traction Control rotates cylinder cutting to prevent this situation from occurring.
The launch control facility allows a driver to have a full throttle opening whilst the system holds the engine speed at the correct RPM for a perfect launch. This eliminates the task and delay of the driver trying to balance the clutch and throttle on take off.
We have many years of experience installing and calibrating the Race Logic traction control and launch control system so please contact us here to discuss or purchase the right system for you http://www.tdi-plc.com/contact-us/
In addition to the above, we offer the following services for race and high performance cars:
- Dyno testing and drivetrain optimisation http://www.tdi-plc.com/motorsport/chassis-dyno-testing-optimisation/
- Race car preparation http://www.tdi-plc.com/motorsport/race-vehicle-preparation/
- Race vehicle calibration http://www.tdi-plc.com/motorsport/race-vehicle-calibration/
- Aerodynamics development http://www.tdi-plc.com/motorsport/aerodynamics-development/
- Chassis engineering and calibration http://www.tdi-plc.com/motorsport/chassis-engineering-and-calibration/
- Track-side support http://www.tdi-plc.com/motorsport/track-side-support/
- Engine building and testing http://www.tdi-plc.com/road-car-optimisation/race-engine-build-and-test/
- Servicing and repairs http://www.tdi-plc.com/road-car-optimisation/performance-car-servicing-and-repairs/