Why do you want no regen in snow?

[teartags]

I have driven OPD exactly once in my life and that was on my First Drive in an R1T. I felt like I picked it up pretty quickly and enjoyed it. I'm looking forward to exploring it more when I pick up my own R1T (tomorrow!)
One thing I don't understand are the frequent requests here for NO regen in snow mode. The way I drive in the snow is to avoid touching the brakes as much as possible. Especially when I'm coming down a pass, but generally all the time. It seems to me that as soon as the brakes lock, you're done for. Therefore, I downshift (in my automatic) as much as I possibly can. So if you have no regen, isn't your only way to slow down this coasting 7k lb. truck to use the brakes? The theory seems like OPD is an almost infinite amount of gears to downshift to without the high RPM of a gear downshift that could also start you spinning. Not being in high regen makes sense to me as I would think that would be a lot more herky-jerky and the wheels could break loose.

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[WSea]

Lower regen in snowmode. The natural reaction in a slide is to take your foot off the go pedal causing regen induced locked up tires. Most likely much of what you're reading are old threads prior to the update with snowmode.

 

[R.I.P.]

I have driven OPD exactly once in my life and that was on my First Drive in an R1T. I felt like I picked it up pretty quickly and enjoyed it. I'm looking forward to exploring it more when I pick up my own R1T (tomorrow!)
One thing I don't understand are the frequent requests here for NO regen in snow mode. The way I drive in the snow is to avoid touching the brakes as much as possible. Especially when I'm coming down a pass, but generally all the time. It seems to me that as soon as the brakes lock, you're done for. Therefore, I downshift (in my automatic) as much as I possibly can. So if you have no regen, isn't your only way to slow down this coasting 7k lb. truck to use the brakes? The theory seems like OPD is an almost infinite amount of gears to downshift to without the high RPM of a gear downshift that could also start you spinning. Not being in high regen makes sense to me as I would think that would be a lot more herky-jerky and the wheels could break loose.

You are downshifting in a vehicle with a differential, and letting the inherent stability of the traction wheel keep you straight while the wheel with the least traction tries to slow you down. Very effective.

Since the QM has no differential, it cannot do this. Regen in the QM is like hitting the brakes; all 4 slide & you lose control. It was FREEKY when I first got my QM.

Snow mode helps mask this issue by dialing the regen way back, but the problem is still there.

 

[TollKeeper]

There was a video on YouTube where a QM is going down a snow covered road downhill. The owner is going slow, and then the rear wheels lock up, and the drivers natural reaction was to take his foot off the pedal, and the fronts locked up... Well it was just a slip and slide at that point.

I cant find the video at the moment..

 

[Electrified Outdoors]

I had this problem with a Bolt EV. The high regen is too much and will cause sliding especially if you let off quickly. Snow mode not only reduces regen to a low setting but it remaps the accelerator to smooth out power delivery.

Think of it as hitting the brakes hard vs just light application of the brakes. Its similar with regen.

With an EV you need to change the wat you drive it in snow/ice. Abruptly letting off accelerator is not a good thing to do in an EV in the snow.... It takes a lot of getting used to.

 

[Dark-Fx]

I didn't have any issues with my R1T in flatland last year but I run snow tires. They make all the difference IMO. If you are sliding/locking up tires trying to slow down you were going too fast for the amount of traction you have available.

 

[M00v0vr]

You are downshifting in a vehicle with a differential, and letting the inherent stability of the traction wheel keep you straight while the wheel with the least traction tries to slow you down. Very effective.

Since the QM has no differential, it cannot do this. Regen in the QM is like hitting the brakes; all 4 slide & you lose control. It was FREEKY when I first got my QM.

Snow mode helps mask this issue by dialing the regen way back, but the problem is still there.

Ya, what he said, snow mode is better, no mode would be best.

 

[mkhuffman]

There was a video on YouTube where a QM is going down a snow covered road downhill. The owner is going slow, and then the rear wheels lock up, and the drivers natural reaction was to take his foot off the pedal, and the fronts locked up... Well it was just a slip and slide at that point.

I cant find the video at the moment..

That actually makes a lot of sense. Regen will bring the truck to a stop, so when the tires have no traction, they stop even though the truck is still moving.

In a ICE vehicle the wheels keep moving, just more slowly. They never stop unless you hit the brakes.

 

[pc500]

Because when you drive down an icy ass mountain road that's unpaved and has grade like this, you push in the clutch on a stick shift to maintain directional control and either pulse the brakes or usa abs.

Modulating that is hard. There are simply some cases where coasting is best.

 

[Ingo B]

That actually makes a lot of sense. Regen will bring the truck to a stop, so when the tires have no traction, they stop even though the truck is still moving.

In a ICE vehicle the wheels keep moving, just more slowly. They never stop unless you hit the brakes.

Yeah, OPD is a huge paradigm shift, and we have to recreate that coasting effect by staying active with the accelerator. It goes against decades of muscle memory and instincts.

 

[Nexus]

The way I drive in the snow is to avoid touching the brakes as much as possible. Especially when I'm coming down a pass, but generally all the time. It seems to me that as soon as the brakes lock, you're done for. Therefore, I downshift (in my automatic) as much as I possibly can.

Back in the day, it was recommended, in snow, to put automatic vehicles in neutral prior to stopping. This was because if you tried to use both, with a rear wheel drive vehicle, the fronts could lock and/or thr rears could spin since they were being driven by thr transmission. I could see this being an issue if, as posted earlier, the driver needs to slow faster than the transmission is capable.

 

[Nine_One_Six_R1S]

Back in the day, it was recommended, in snow, to put automatic vehicles in neutral prior to stopping. This was because if you tried to use both, with a rear wheel drive vehicle, the fronts could lock and/or thr rears could spin since they were being driven by thr transmission. I could see this being an issue if, as posted earlier, the driver needs to slow faster than the transmission is capable.

I have not been in this situation, but what is one's best response in this situation (assume a Quad with all 4 wheels locked in a descend) :

1. brake - I assume it would do nothing since you are already stopped in the computers eye.
2. Slight tap of acceleration - might regain some traction with the right tires
3. shift into neutral - what happens here?

 

[mtberman]

I have driven my new dual motor R1T in snow/icy conditions a few times now and my truck always starts to slide a little in All Purpose due to the aggressive regen upon lifting off.

Mine does not really SLIDE - slide, however. The ABS and stability control also activate upon sensing lift-off induced slippage and pretty much cancel out most of the actual sliding.

I always switch to Snow Mode. The low regen lends a calmness that is hard to duplicate when you’re a human driver who just felt their new $90K car slide on ice. One’s instinct is always to let off the pedal.

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