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Link G4+ Xtreme vs Link G4X Xtreme traction control


Lewis

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Hi there. 

I would like to know for those that have tried and tested the traction control on both platforms. 

Is there any difference between them in terms of applying the power to the road, how do they act, is there any difference on how intrusive/progressive they are? Do they act as an On/Off switch? 

What's the maximum frequency the DI of the new ecu can handle? 

Any input will be appreciated, thanks. 

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Both can work very well and can acheive smooth and fast arrest of wheel slip. 

The G4+ was a lot more basic, it could only apply retard and cut proportionally with each other at the same time for torque reduction.  G4X torque reduction is more sophisticated with a dedicated torque management function.  So the ecu can estimate how much torque the engine is making and achieve the required reduction using a mixture of retard, cuts, e-throttle & closed loop boost control.  It will initially use retard, then cut to arrest slip since these have immediate effect on torque, but also initiate reduction of throttle and boost at the same time, when these slower moving torque reduction methods catch up the cuts and retard will be removed or reduced.  This allows less reliance on cuts and retard which can be quite hard on the engine especially in cases such as a wet endurance race where your TC may be working hard for hours. 

G4+ only had 2 slip tables, G4X has 2 slip tables and an overlay table, and you can also add a GP PWM to one axis of one of the tables if you want to add further control dimensions.  

G4X has further improvements to the slip sources also - for example it can be set up to use the "outside wheel" (uses the on board acclerometers to determine which way the car is cornering) for the driving wheel speed source which works better for some types of diffs.  It can also switch between two different wheel speed calibrations if for example you have different sized wet and dry tyres or drag/road tyres etc.

 

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On 12/28/2022 at 1:32 AM, Lewis said:

Hi there. 

I would like to know for those that have tried and tested the traction control on both platforms. 

Is there any difference between them in terms of applying the power to the road, how do they act, is there any difference on how intrusive/progressive they are? Do they act as an On/Off switch? 

What's the maximum frequency the DI of the new ecu can handle? 

Any input will be appreciated, thanks. 

This G4+ had somewhat less sophisticated; it could only simultaneously apply retard and cut in proportion to each other for torque reduction. A specific torque control function makes the G4X torque reduction more advanced. Therefore, the ecu can determine how much torque the engine is producing and then reduce it to the desired level using a combination of retard, cuts, e-throttle, and closed loop boost control. Since they have an immediate impact on torque, it will first employ retard and then cut to arrest slip. At the same time, it will start to reduce throttle and boost, and when these slower-moving torque reduction techniques catch up, the cuts and retard will be eliminated link tracker or scaled back. G4X contains 2 slip tables, an overlay table, and the option to add a GP PWM to one of the tables' axes if you wish to add more control dimensions. G4+ only has 2 slip tables. G4X has made other changes to the slip sources as well. For instance, it may be configured to utilise the "outside wheel" (uses the on-board accelerometers to identify which way the car is cornering) for the driving wheel speed source, which is preferable for various types of diffs. If you have various sized wet and dry tyres, drag or road tyres, etc., it can also switch between two distinct wheel speed calibrations.

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