caross
Posts: 51
Joined: Wed May 29, 2013 7:07 am
Delivery Date: 26 May 2013
Leaf Number: 406569
Location: Bryn Mawr, PA

Drive Mode "D" or "B" and why?

So, I'm a new Leaf owner, and an even newer member here... so please forgive if I posted this in the wrong place... or if it was discussed before. Quick search did not bring anything up.

What is the real difference between "D" and "B" drive modes? "B" is clearly more agressive on the breaking, but does it reduce power consumption? Reason I am asking is that, yesterday, on a drive I was on a long downward sloping highway. I was in "B" mode, because that seemed to be the most efficient thing to do. But then it got me thinking... I have a lot less "glide" distance.

So, what gives?

When should I use it? When should I not use it?

Thanks!
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apvbguy
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Delivery Date: 10 Apr 2013
Location: Jacksonville FL.

Re: Drive Mode "D" or "B" and why?

caross wrote:So, I'm a new Leaf owner, and an even newer member here... so please forgive if I posted this in the wrong place... or if it was discussed before. Quick search did not bring anything up.

What is the real difference between "D" and "B" drive modes? "B" is clearly more agressive on the breaking, but does it reduce power consumption? Reason I am asking is that, yesterday, on a drive I was on a long downward sloping highway. I was in "B" mode, because that seemed to be the most efficient thing to do. But then it got me thinking... I have a lot less "glide" distance.

So, what gives?

When should I use it? When should I not use it?

Thanks!
AFAIK it has no effect on driving or power consumption, it does make the brakes "grabbier" for more regen.
If I use the B mode I use it like a downshift on a gasser. I rarely use it at all
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evnow
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Re: Drive Mode "D" or "B" and why?

"B" gives a lot more regen just by releasing the accelerator. With some practice this helps you do almost one pedal driving. It is great for city driving where you have to frequently slow down for traffic lights or just traffic. It is also good when you are going downhill.

D is better for gliding and can be more efficient in relatively constant speed situations like freeways.

I drive almost exclusively in B. BTW, for the '11/'12 owners, this is close to the Eco mode, without sacrificing the acceleration (more accurately acceleration for a given distance of the accelerator).
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caross
Posts: 51
Joined: Wed May 29, 2013 7:07 am
Delivery Date: 26 May 2013
Leaf Number: 406569
Location: Bryn Mawr, PA

Re: Drive Mode "D" or "B" and why?

Cool, thanks.

It does seem that the Leaf will require some slight variation driving habits - all of which I am willing to do - just takes time to learn tho.
2013 Leaf : SL : Silver / Black
ENIAC
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Leaf Number: 224
Location: Sun Diego, CA USA

Re: Drive Mode "D" or "B" and why?

evnow wrote:"B" gives a lot more regen just by releasing the accelerator. With some practice this helps you do almost one pedal driving. It is great for city driving where you have to frequently slow down for traffic lights or just traffic. It is also good when you are going downhill.

D is better for gliding and can be more efficient in relatively constant speed situations like freeways.

I drive almost exclusively in B. BTW, for the '11/'12 owners, this is close to the Eco mode, without sacrificing the acceleration (more accurately acceleration for a given distance of the accelerator).
I wish there was an S/W update from Nissan I could opt into to turn my "E" to "B".
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wsbsteven
Posts: 47
Joined: Mon May 06, 2013 7:55 pm
Delivery Date: 18 May 2013
Leaf Number: 408488
Location: Saint Louis, MO

Re: Drive Mode "D" or "B" and why?

I started driving in b mode all the time because I was having trouble adjusting to the brakes. In my Prius I could regen brake down to low speeds until I felt the grab of the friction brakes. In the Leaf I brake with the same pressure and I wouldn't slow down much at all so I'd brake more to compensate which then would engage the friction brakes throwing me forward. I found that using b mode to do my regen braking for me gives it a Prius like experience so when I do use the brakes it's a lot smoother.
LEAFfan
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Re: Drive Mode "D" or "B" and why?

B mode doesn't reduce Power/Energy Usage, but ECO does. I leave it in B ECO not for regen into the pack, but for braking after coasting in N while approaching lights. It's more efficient to coast in N than using regen unless you're going down steep terrain.
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DanCar
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Re: Drive Mode "D" or "B" and why?

LEAFfan wrote:B mode doesn't reduce Power/Energy Usage, but ECO does...
Not sure what your trying to saying here, but B mode does reduce power energy usage rather than using friction brakes. It reduces energy usage because energy is put back into the battery pack and thus overall energy usage goes down. Yeah, B mode doesn't lower the climate control usage of energy or anything else similar to what ECO mode does.
2013 Leaf SL leased 3/10/2013
caross
Posts: 51
Joined: Wed May 29, 2013 7:07 am
Delivery Date: 26 May 2013
Leaf Number: 406569
Location: Bryn Mawr, PA

Re: Drive Mode "D" or "B" and why?

I guess for me it is the goal to use the most efficient use of the battery without "inconvenience" in my driving style.

As it is now, I always drive in ECO mode and in "B" mode for the majority of my drive time.

I'm seeing about 3.9 M/kWh average.
2013 Leaf : SL : Silver / Black
LEAFSpecialist
Posts: 10
Joined: Wed May 01, 2013 9:31 am

Re: Drive Mode "D" or "B" and why?

The "B" mode actually stands for Brake Mode and was created to allow the vehicle to slow down using more regen braking and less brake.

A good place to use this is coming down steep hills/mountains or in traffic for added regen. It also changes the sensitivity of the gas pedal so you will have to accelerate more to get the car back up to speed.

Hope this helps, and happy driving!

~LEAFSpecialist

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