Covered by one or more of the following U.S. Patents: 9,371,792, 9,091,224, 9,254,748, and other issued and pending patents.
Important: Do not disable the VSA in FlashProManager for software traction control to function (you can switch off or disable fully the VSA using the dashboard button).
Software based traction control uses the wheel speed inputs from the factory VSA unit. It is not available for all vehicles.
There are some differences from hardware traction control in that the target wheel slip is fixed with software traction control and also the power reduction method is retard only with software traction control.
The software traction control can be used with the factory VSA either enabled or disabled. We recommend leaving the factory VSA enabled unless the factory VSA is intrusive.
The difference between Hondata software traction control and factory VSA is that the factory VSA reduces power by the so called 'slow torque' method. This means that it will close the throttle plate and with turbo vehicles, reduce boost. The 'slow torque' method is slow to both reduce power and bring back in power once the wheel slip is reduced. Hondata software traction control reduces power to the 'fast torque' method, which is basically retarding the ignition timing to reduce power. The advantage of this method is that the power reduction is instant and also the power and be bought back in instantly. The disadvantage of fast torque reduction is that at high power reduction levels the engine will misfire, which causes no damage but will make the exhaust pop, which is unacceptable for OEM applications. Also the Hondata software traction is under your control whereas the factory VSA is fixed in parameters and operation.
Enabled will enable software traction control. The traction control can be disabled while driving by switching on the cruise control main. Note that the cruise control does not need to be active; just the cruise control main switched on.
Minimum speed is the minimum speed from the un-driven wheels before the traction control operates.
Target slip is the maximum wheel slip between the driven wheels and un-driven wheels before the engine output is reduced.
Ignition Retard sets the amount of ignition retard when wheel slip occurs. Values are interpolated between columns.
Cornering correction corrects the wheel slip when the vehicle is turning, as the front wheels will be faster than the rear wheels when turning. The compensation values are calculated from the track and wheelbase of the vehicle and should not need to be altered.
Launch compensation allows for increased wheel slip at slow speeds.
Smoothing can use with PID control or a maximum change rate to smooth the operation of the traction control retard.
If use PID is enabled, then the P, I and D gains are used plus the D smoothing. Otherwise the change rate increasing and decreasing are used.