Snow Mode--still too much regenerative braking

[Redline]

I was out that night in the Edina/SLP area and the roads were terrible that night. Drove by a big car fire on 100.

The regen was also causing some issues for me and I really, really had to be cautious with it on HWY 100.

Sponsored

 

[Bullwinkle]

If the truck isn't using the friction brakes to slow down, there is no ABS in the traditional sense. It would all be up to the motors to modulate regen so as not to lock up the wheels. This can still be effective but it might feel different since there is no solenoid to pulse the application of the brakes.

If you have regenerative braking assist turned on, it be in effect since the battery will likely be cold when it's snowy, and then traditional ABS will be a factor. I'm not sure at what battery temperature this comes into play, but I think it's actually pretty high. On my Model S the battery needed to be over 67F to get full regen.

Regen definitely works in sub freezing temps with Rivians and there is no way to turn it off.

 

[CrazyOne]

It definitely takes practice switching from regular braking to regen braking in general, and even more so when the bad weather comes. I just try to think of it as the same technique used when I had manual vehicles.

Rivian should allow regen to be turned off for those who would prefer it, though…

I still have my manual car. They are not the same.

Rivian is like driving a manual car in first gear all the time, without the ability to go into neutral or use the clutch.

 

[COdogman]

I still have my manual car. They are not the same.

Rivian is like driving a manual car in first gear all the time, without the ability to go into neutral or use the clutch.

I never went into neutral with a manual when trying to slow down on ice or snow. Whenever possible I would gear down and let the transmission do some of that work, which IMO is a similar feeling to using regen brakes when lifting off the accelerator.

Whether one prefers the low or high setting I guess you could say it feels like second or first gear??‍ Once one practices slowly lifting off the accelerator and allowing the brakes to ease in, it’s not like one or the other.

 

[CrazyOne]

I never went into neutral with a manual when trying to slow down on ice or snow. Whenever possible I would gear down and let the transmission do some of that work, which IMO is a similar feeling to using regen brakes when lifting off the accelerator.

Whether one prefers the low or high setting I guess you could say it feels like second or first gear??‍ Once one practices slowly lifting off the accelerator and allowing the brakes to ease in, it’s not like one or the other.

Depends on the engine. I4 engines don't have much braking while V6/V8 engines have too much in 1st. I have a V6. Turbo doesn't matter for engine braking afaik.

I always clutch in or go to neutral in 1st gear for a smooth ride. Not so in other gears in the dry, but definitely clutch in while driving in snow. Else the wheels lockup.

 

[Bullwinkle]

Depends on the engine. I4 engines don't have much braking while V6/V8 engines have too much in 1st. I have a V6. Turbo doesn't matter for engine braking afaik.

I always clutch in or go to neutral in 1st gear for a smooth ride. Not so in other gears in the dry, but definitely clutch in while driving in snow. Else the wheels lockup.

I have had plenty of manual transmission cars. Downshifting to brakes is fun and works great for 3 seasons. On ice it locks the wheels and is a recipe for disaster.

 

[beatle]

Regen definitely works in sub freezing temps with Rivians and there is no way to turn it off.

It may not disable regen entirely, but it's weaker in the cold. If it feels the same to you, check that regen braking assistance is not turned on. With it on, the friction brakes will be blended in to offer similar braking performance to full regen, even if it's freezing.

 

[Bullwinkle]

It may not disable regen entirely, but it's weaker in the cold. If it feels the same to you, check that regen braking assistance is not turned on. With it on, the friction brakes will be blended in to offer similar braking performance to full regen, even if it's freezing.

Are you saying make sure it is at the lowest level on the Snow mode screen or is this a separate toggle in settings somewhere?

 

[R1TCntrlMaIzzy]

Are you saying make sure it is at the lowest level on the Snow mode screen or is this a separate toggle in settings somewhere?

This..

 

[SparkyR1t]

Teslas don't have as much regen i think and also have a coast mode or something I think

2024 Model Y does not have a low regen mode any longer. Just full regen. Should be fun in the snow. I have communicated with Tesla and they have no immediate plans to remedy although this could be done via software update.

 

[Bullwinkle]

This..

Thank you. If friction brakes are being added, then antilock should work. Hmm, next time it is icy, I may have to find a parking lot and try both ways.

 

[sgec]

Below about 10mph ALL regen goes to the front wheels. This results in the front wheels locking up making it impossible to steer.

 

[Bullwinkle]

Below about 10mph ALL regen goes to the front wheels. This results in the front wheels locking up making it impossible to steer.

That would explain why I was sliding and unable to steer

 

[Bullwinkle]

It may not disable regen entirely, but it's weaker in the cold. If it feels the same to you, check that regen braking assistance is not turned on. With it on, the friction brakes will be blended in to offer similar braking performance to full regen, even if it's freezing.

I just checked and I do have Regenerative Braking Assist on. I assume that antilock is active to the extent the brakes are used.

 

[beatle]

I just checked and I do have Regenerative Braking Assist on. I assume that antilock is active to the extent the brakes are used.

That'd be my guess as well. I wonder if regen ABS is superior to friction brake ABS in super-low traction situations? Heck, I wonder what regen "ABS" feels like.

Sponsored