[Phildas1]

I have had a 22 iX 50 for about a year and drive mainly in B mode in around town driving and D mode ( set on adaptive) for highway. I just noticed a few days ago when driving that it seems like when I toggle between D and B mode it seems like there is some regen going on in B even when the accelerator pedal is depressed. When driving at 60mph on flat roads in D and toggling to B the car slows to about 55. Toggling back to D the car gets back to 60. This is without any change in the pedal. Don’t think it is in my head. Any thoughts?

[mindmachine]

Originally Posted by Phildas1

I have had a 22 iX 50 for about a year and drive mainly in B mode in around town driving and D mode ( set on adaptive) for highway. I just noticed a few days ago when driving that it seems like when I toggle between D and B mode it seems like there is some regen going on in B even when the accelerator pedal is depressed. When driving at 60mph on flat roads in D and toggling to B the car slows to about 55. Toggling back to D the car gets back to 60. This is without any change in the pedal. Don’t think it is in my head. Any thoughts?

It may be happening, but it just doesn't make any sense as to why BMW would do that. Why burn electricity to make re-gen happen while driving w/o letting off the accelerator.

[ggalanis]

Originally Posted by Phildas1

I have had a 22 iX 50 for about a year and drive mainly in B mode in around town driving and D mode ( set on adaptive) for highway. I just noticed a few days ago when driving that it seems like when I toggle between D and B mode it seems like there is some regen going on in B even when the accelerator pedal is depressed. When driving at 60mph on flat roads in D and toggling to B the car slows to about 55. Toggling back to D the car gets back to 60. This is without any change in the pedal. Don’t think it is in my head. Any thoughts?

Working as designed.

In B mode, the first part of the pedal travel (let's say 20%) is used for modulating braking/Regen.
So when cruising in D mode you are likely using 15% of the throttle pedal travel. Switch to B mode and now you are telling the car to Regen a bit.

[26theone]

I think D mode is pretty great. It apparently also uses regen instead of mechanical brakes when pressing the brake pedal even in D mode. So you get to coast plus get some regen and lots of regen when you press the brake pedal. Best of both worlds really. The adaptive regen does make it harder to get used to how it coasts but overall I think a great compromise. Underrated feature not even available in Teslas. My wheels stay so clean compared to my previous X5. It doesnt seem to be using the brake pads much at all.

[Pictor]

Originally Posted by mindmachine

It may be happening, but it just doesn't make any sense as to why BMW would do that. Why burn electricity to make re-gen happen while driving w/o letting off the accelerator.

That's not quite what's happening. The motor can either regenerate energy or consume energy for forward motion. It cannot do both at the same time. I suppose it's possible to have one motor regenerate while the other accelerates but it's illogical and inefficient given the losses involved. I suspect what you're feeling is the difference in pedal resistance between the two modes. As a driver, having more resistance makes it easier to modulate the accelerator better with the added feedback.

[ggalanis]

Originally Posted by 26theone

I think D mode is pretty great. It apparently also uses regen instead of mechanical brakes when pressing the brake pedal even in D mode. So you get to coast plus get some regen and lots of regen when you press the brake pedal. Best of both worlds really. The adaptive regen does make it harder to get used to how it coasts but overall I think a great compromise. Underrated feature not even available in Teslas. My wheels stay so clean compared to my previous X5. It doesnt seem to be using the brake pads much at all.

Full coasting by completely letting off the throttle is only available if you are on adaptive. I don't use any other regen setting so I don't know if there is a throttle position in those settings where the car actually coasts so forgive me if there is, but even if that is the case, it wouldn't be as easy/intuitive as fully letting off the pedal.

I wish they simply had a setting with no automatic regen.

[bmwix1]

If you want to perform a tank move with quad motors, you would brake (regen) on the inner front wheel and put high torque low speed on the outter wheels with 4 wheel steering enabled (3 in use).

[ZigmundUK]

Originally Posted by ggalanis

Working as designed.

In B mode, the first part of the pedal travel (let's say 20%) is used for modulating braking/Regen.
So when cruising in D mode you are likely using 15% of the throttle pedal travel. Switch to B mode and now you are telling the car to Regen a bit.

Yes this. The pedal is calibrated differently in each mode.

I’m now a constant B mode driver - I call it dodgems mode. I like the fact that just through the one pedal you can go from 100% power to 100% regen braking. Very few times I need to move over to the brake pedal now.

I wish I could just have the car default to efficient mode and B as standard…

[NomoTesla]

Originally Posted by ggalanis

Full coasting by completely letting off the throttle is only available if you are on adaptive. I don't use any other regen setting so I don't know if there is a throttle position in those settings where the car actually coasts so forgive me if there is, but even if that is the case, it wouldn't be as easy/intuitive as fully letting off the pedal.

I wish they simply had a setting with no automatic regen.

Put 'er in Neutral!

[ricerboi]

Originally Posted by NomoTesla

Put 'er in Neutral!

Speaking of which, does it mess up the motors if we go in and out of N and D at highway speeds?

[darylp310]

Originally Posted by ricerboi

Speaking of which, does it mess up the motors if we go in and out of N and D at highway speeds?

Since there are no gears, wouldn't this be effectively the same thing as coasting? The car swaps in and out of coasting mode all the time when you are driving in D mode, right?

[ZigmundUK]

Originally Posted by ricerboi

Speaking of which, does it mess up the motors if we go in and out of N and D at highway speeds?

What would be the advantage of this? D mode generally coasts where it needs to. I would never recommend manually moving to N while moving in case you need to emergency brake - the D mode will keep the motor engaged and thus less likely to skid.

[ricerboi]

Originally Posted by ZigmundUK

What would be the advantage of this? D mode generally coasts where it needs to. I would never recommend manually moving to N while moving in case you need to emergency brake - the D mode will keep the motor engaged and thus less likely to skid.

I don’t know. I’m asking purely from a curiosity standpoint, like will toggling between D and N at speed damage the electric motor like in a manual car going 80mph clutching in and popping it into 6th gear (it’s fine) or an automatic at 80mph going from N to D where the trans has to match gear and rev. D obviously regens so it’s probably better.

The only time I actually use N is at a car wash where the little wheels on the rail push your car.

[ZigmundUK]

Originally Posted by ricerboi

I don’t know. I’m asking purely from a curiosity standpoint, like will toggling between D and N at speed damage the electric motor like in a manual car going 80mph clutching in and popping it into 6th gear (it’s fine) or an automatic at 80mph going from N to D where the trans has to match gear and rev. D obviously regens so it’s probably better.

The only time I actually use N is at a car wash where the little wheels on the rail push your car.

Interesting. I suspect there is no physical clutch - it’s just either electronically on or not. Like a dynamo - it’s only harder to push when you switch the light on. (Showing my age)

[thebishman]

In ‘B’ mode there is no way to adjust Regen is there? I ask because at times say when coming up to a traffic light with no one in front of me the iX doesn’t seem like it wants to slow down/stop completely and I’ve had to switch to the brake pedal.
But, if there’s a car in front already stopped, the iX always comes to a complete stop even when I’m modulating my foot the same amount; (I’m assuming it’s using radar to increase Regen in this latter scenario).

I know that in ‘D’ mode you can vary Regen, but not in ‘B’ it seems?

[Pictor]

In the B position, I can bring the car to a complete stop even when there is no car in front of me. In D position, the car will not come to a stop unless you press the brake.

[Ginster6]

Originally Posted by Pictor

In the B position, I can bring the car to a complete stop even when there is no car in front of me. In D position, the car will not come to a stop unless you press the brake.

in D mode. if you set adaptive... it will slow and stop, well almost stop still need to brake. if there is a vehicle in front.

[darylp310]

Originally Posted by thebishman

In ‘B’ mode there is no way to adjust Regen is there? I ask because at times say when coming up to a traffic light with no one in front of me the iX doesn’t seem like it wants to slow down/stop completely and I’ve had to switch to the brake pedal.
But, if there’s a car in front already stopped, the iX always comes to a complete stop even when I’m modulating my foot the same amount; (I’m assuming it’s using radar to increase Regen in this latter scenario).

I know that in ‘D’ mode you can vary Regen, but not in ‘B’ it seems?

There's no way to adjust the strength of Reg in 'B' mode. Indeed when I'm driving too fast, sometimes merely taking my foot off the accelerator is not enough to stop the car at intersections, so I need to put my foot on the brake.

But rest assured, with the BMW iX, even if you have to put your foot on the brake, you are STILL USING REGEN!! The BMW system is very intelligent, so it tries to use regen to stop you all the time whether you are using 'B' mode, or 'D' mode. It's very subtle and you won't even noticed that it's not applying the physical brakes! So you are still getting all the energy transferred back to the battery even if you have to press the brake manually!!

[Pictor]

Originally Posted by Ginster6

in D mode. if you set adaptive... it will slow and stop, well almost stop still need to brake. if there is a vehicle in front.

The 'almost stop' function of D hasn't been my experience. Adaptive D will slow the car but will not stop the car in a reasonable time. You will need to use the brake in this position. I use Adaptive D all the time on highways but in town I use B which will bring the car to a stop.

[mfdutra]

Even in B, try to actually use the brakes every so often, maybe every few days, to clean them.

[NomoTesla]

B mode will come to a complete stop in all situations using single pedal. No need for brakes and no need for Auto Hold.

[exxxviii]

Originally Posted by mfdutra

Even in B, try to actually use the brakes every so often, maybe every few days, to clean them.

One point of note here... using the brake pedal does not always engage the friction brakes. It will use regen unless harder braking is needed. So, you sometimes will need to aggressively hit the brakes to get to friction.

The general advise to occasionally use friction brakes is solid. I will go weeks without friction brakes ever engaging.