vger105
Posts: 7
Joined: Sun Oct 09, 2011 6:10 am
Delivery Date: 09 Oct 2011

Shifting into "B" mode

Sun Dec 17, 2017 7:04 pm

We are the deleriously happy owners of a 2017 Leaf SV, with a question. Is there any reason not to shift into the "B" mode. The regen seems a.compelling reason to do so.
Thanks for any insight.

LeftieBiker
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Location: Upstate New York, US

Re: Shifting into "B" mode

Sun Dec 17, 2017 7:11 pm

There are other topics on this, but the short answer is that B Mode is good for city driving, but D Mode is better for highway driving, because coasting is much more efficient than using Regen.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GerryAZ
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Re: Shifting into "B" mode

Mon Dec 18, 2017 12:16 am

B mode is great for "one pedal" driving. I use it all the time, especially in slow and go on the freeway. Differences in energy consumption between B mode, D mode, and shifting to N for coasting really depend upon driving style. If you hold the accelerator in the neutral position where there is no power in or out when coasting, it is the same as shifting to neutral and it does not matter whether you are in D or B mode. If you tend to move the accelerator pedal more than necessary to hold a steady speed, then D mode and shifting to neutral may improve efficiency under certain conditions compared to B mode.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

DaveinOlyWA
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Leaf Number: 314199
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Re: Shifting into "B" mode

Mon Dec 18, 2017 8:19 am

I do B or neutral. Nothing else. There is no negative to shifting as much as you want. You are not wearing out anything that would not be worn during the normal driving process
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 2483 miles, 490 GIDs, 38.2 Ahr available, SOH 99.30, Hx 114.37
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Bob
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Location: New Hampshire

Re: Shifting into "B" mode

Mon Dec 18, 2017 9:13 am

All of the previous comments are good advice but in most cases, these differences are small. They will save you a little bit in efficiency if you get it right, and perhaps cost a bit in efficiency if you just forget the shift and drive in D all the time. But it won't double your range.

That said, no matter what else you do, B-mode is great for slowing the car when coming down a hill, sort of like downshifting an ICE. Not only will it save your brakes but it will regenerate. You can do the same thing by pushing on the brake pedal lightly, but most people wait until the last minute and then push too hard. B-mode is much more effective.

Bob

LeftieBiker
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Re: Shifting into "B" mode

Mon Dec 18, 2017 11:38 am

I find that for all normal downhills (including some fairly steep ones) D + Eco provides the best regen braking. B mode slows the car too much and I have to press the accelerator to keep speed up.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

coupedncal
Posts: 7
Joined: Mon Nov 13, 2017 11:11 pm
Delivery Date: 06 Aug 2017
Leaf Number: 309668

Re: Shifting into "B" mode

Tue Dec 19, 2017 11:18 pm

I have seen some reference to not using the B mode in hot (or maybe it was the cold) climate. Any basis to this or do i not remember it correctly?

LeftieBiker
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Re: Shifting into "B" mode

Tue Dec 19, 2017 11:40 pm

B mode produces some battery heating, especially on long steep downhills, and that would be undesirable in hot temps.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

brotherjethro
Posts: 45
Joined: Mon Jul 03, 2017 6:21 am
Delivery Date: 03 May 2017
Location: Vancouver, WA

Re: Shifting into "B" mode

Fri Dec 22, 2017 8:29 am

I almost always drive in B mode -- but one annoyance causes me to shift to D mode: If you're using cruise control and you turn it off while in B mode, the car will slow aggressively, which is usually not what I want. So I try to remember to shift into D if I turn on cruise.
2013 Pearl White SV, bought used in 2017 with only 5100 miles. Vancouver, WA.

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Nubo
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Re: Shifting into "B" mode

Fri Dec 22, 2017 9:40 am

brotherjethro wrote:I almost always drive in B mode -- but one annoyance causes me to shift to D mode: If you're using cruise control and you turn it off while in B mode, the car will slow aggressively, which is usually not what I want. So I try to remember to shift into D if I turn on cruise.


When transitioning out of cruise-control I will apply my foot to the accelerator to find the "neutral point", before cancelling cruise to "accept the hand-off". This avoids the deceleration and it's something I've used in both drive modes and also on other cars in general. Keeps the passengers happy. 8-)
I noticed you're still working with polymers.

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