[P2]

Does anyone understand how the single motor eDrive 40 provides traction? Is it similar to an open differential like my old 2006 325 RWD? Or is it like a limited slip or fixed differential?
I'm thinking ahead to slippery street driving in ChicagoLand. I had the 06 RWD for 11 years and learned to drive in Western NY on RWD. So, I'm no stranger to snow and open diffs. Wife is not a fan however. . Just wondering what to expect.

[Encanto]

Originally Posted by P2

Does anyone understand how the single motor eDrive 40 provides traction? Is it similar to an open differential like my old 2006 325 RWD? Or is it like a limited slip or fixed differential?
I'm thinking ahead to slippery street driving in ChicagoLand. I had the 06 RWD for 11 years and learned to drive in Western NY on RWD. So, I'm no stranger to snow and open diffs. Wife is not a fan however. . Just wondering what to expect.

The traction control is embedded in the electric motor management system, and what BMW calls "near-actuator wheel slip limitation" means that this is an open differential where the traction, front/rear torque distribution and slip are all controlled by the motor management system.

[P2]

Originally Posted by Encanto

The traction control is embedded in the electric motor management system, and what BMW calls "near-actuator wheel slip limitation" means that this is an open differential where the traction, front/rear torque distribution and slip are all controlled by the motor management system.

Thanks. I read up on what little I can find on this.

If I understand correctly, minus any electric assist, the low (or no) friction wheel will spin while the wheel with friction will remain stationary along with the vehicle . The i4 uses the "near-actuator wheel slip limitation" to slow the low friction wheel which they claim to be more effective than the DSC system which I would have had on my 06 325 RWD.

I see the i3 uses this system. I did search for some info on i3 in the snow and will do so some more.

[WallyF]

P2,
Have you found out any details on the i3 near actuator limited slip? How does it work to limit the spin of the low friction (slipping) wheel?

Thanks
WallyF

[P2]

Originally Posted by WallyF

P2,
Have you found out any details on the i3 near actuator limited slip? How does it work to limit the spin of the low friction (slipping) wheel?

Thanks
WallyF

Not anything more then above.

[WallyF]

Which is better for driving on snow and ice covered roads using all season tires? Staggered or square setup?

Wallyf

[Rich9600]

Originally Posted by WallyF

Which is better for driving on snow and ice covered roads using all season tires? Staggered or square setup?

Wallyf

Thinner rear tyres give more road pressure and bite in better. The logic on previous RWD BMW's was to go square for snow.
However, on driving an e40 I took a photo of the tyre options. Thinking of winters for my order.
Square 18's at H rating and Slightly Staggered 19" 'performance' winter tyres at V are both listed for the MSport e40.