Now that is some old news. Are we to assume Ducati has not worked this over the past 10 years..and this incident is on a 2013 Honda haha?
What I find interesting about the thread is that now we're on the wheel speed sensor. Which is fine but I would now assume we're in agreeance that the DTC has nothing to do with ABS modulating rear wheel speed, because there's no hydraulic force available for DTC/ABS to work with.
Riddle me this.....
Why does DTC intervene in a straight line in poor grip conditions? It isn't because of the IMU detecting slide.
Do you remember Dani Pedrosa's high-side at Aragon 2013? Famously caused by Marquez's front wheel hitting his rear wheel sensor, which left it dangling... Next corner, launched to the moon!!
To say that relative wheel speed isn't part of the algorithm for DTC is just fanciful.
We're now on the subject of wheel speed and traction control which was said to be fundamental of bikes but also one shouldn't completely rely on the electronics for safety.
What do you mean straight line in poor grip, that's the same exact axis wiggle at speed which is just the same as wheel slip during turn, albeit RPM. Rear wheel speed is not the same as front wheel speed in a straight line is it not? Or would you make the foolish mistake to aim straight at it or go WOT on a wet surface? Roll through it at speed like a chicane and let the tires do their work
Now for the MotoGP or expert track riders that race in the rain - Evo2 is used for the rain, but again that could be managed by front wheel speed, DTC along the long axis of the bike, lean angle and throttle position as part of the RPM function. Rear wheel speed is considered by the IMU - but the software is also predictive, so the bike is assuming a slower speed coming into a turn - from front wheel speed at the front of the bike axis, lean angle, selected gear, other evo2 parameters - but the rear TC can also be turned down and allowed for rear wheel slip, ignoring rear wheel speed. DTC only option is to slightly delay the throttle to slightly manage engine power, in literally milliseconds of a turn is that minutia even seen by the IMU, and it's surely felt by the rider if you're aware of the turn you're going into, but again milliseconds. The excessive lean or slip that would occur from going in steep on a wet surface is due to rider error, not the bike software. I'm not doubting rear wheel speed for Evo2 specifically, that is indeed considered part of the equation but again very marginal considering, it's the last physical sensor position along the bike axis. All the other parameters of the bike is adjusting to lower power output through the turn, to then slightly open the throttle back to the rear wheel.
The primary for getting throttle back open is the software being selected to use, and the rider opening the throttle to a set position, if the software sees the rider going too wide on the throttle, the ECU modifies the throttle signal to then verify a slower band on engine RPM. RPM is a much more immediate and consistent signal compared to a phonic wheel sensor related
specifically to wheel speed. What if the rear wheel is locked because ABS is off? There's no wheel speed feedback because the phonic wheel isn't spinning. You're left with front wheel speed, lean angle, and a software setting. What's the IMU/ECU to do besides control throttle position? Once the engine RPM is slow enough for the software, then only, is the rider allowed to fully utilize the throttle that they think was open, but in reality was slightly delayed by ECU. With a locked rear wheel is the DTC function not the same, as a "rear wheel with excessive speed"? Wouldn't the ECU delay engine power in both instances? Rear wheel speed is much lower in the equation, if even fully referenced. The environment for that is extremely specific and I would say rider induced.
Or take an extended swingarm in the rain, that's even worse. The IMU has a set axis length by bike length, but now the reference is wrong because of a longer swingarm, that in turn allows the bike to slip that much millimeters further, that correlates directly to the length of extended swingarm, before the IMU realizes the slide. Again rear wheel speed is at the lower end of the equation.
If I'm in the market for Evo2 to race/ride in the rain, I would maybe consider the speed sensor specifically for that purpose, but it's not all inclusive for the software and would honestly not be noticed by the rider if they know what they're doing on the bike, like when the DTC settings are down, with rain tires, all still allowed by evo2.
When was the last time we've seen a Ducati high side or lose of traction control in MotoGP or on a public track, using either software?
