Nfuzzy
Posts: 119
Joined: Mon Jul 28, 2014 5:37 pm
Delivery Date: 22 Jul 2014
Leaf Number: 06333
Location: Colorado

Brake lights in B mode

Wed Apr 08, 2015 6:18 pm

Almost got rear ended again tonight. I think it's crazy that the brake lights don't come on any time your foot is completely off the accelerator when in B mode. After all people gently tap their brakes all the time with less deceleration and yet the lights come on.
2015 Leaf S with QC, purchased July '14
35000mi as of August-17, 92% SOH
7kw Solar

cwerdna
Gold Member
Posts: 7256
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Brake lights in B mode

Wed Apr 08, 2015 6:34 pm

If you truly believe this is a safety issue, you should file a formal complaint w/Nissan and NHTSA: http://www.safercar.gov/.

From page 9-15 of the '15 Leaf manual:
REPORTING SAFETY DEFECTS
For USA

If you believe that your vehicle has a defect
which could cause a crash or could
cause injury or death, you should immediately
inform the National Highway Traffic
Safety Administration (NHTSA) in addition
to notifying NISSAN...

'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

LeftieBiker
Posts: 7359
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Brake lights in B mode

Wed Apr 08, 2015 8:34 pm

How is it different from driving a standard shift car in one of the low gears, and taking your foot off the gas...?
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

XeonPony
Posts: 315
Joined: Sun Nov 03, 2013 5:58 pm
Delivery Date: 03 Nov 2013
Leaf Number: 413826
Location: Yorkton, sask, Canada

Re: Brake lights in B mode

Thu Apr 09, 2015 6:40 am

Report the idiot behind you that wasn't paying attention, nothing wrong with the car, just the morons head!

Never have I even been near rear ended when regen breaking, but I do fade it in, I just don't take my foot right off so I come to a screeching halt!
2013 SV Leaf, Level 2 charger, so far all works great! 130Km daily, 100% charge at night on 240 then trickle charge for 8H durring the day on 120v.

Level 2 charge starts at 130am environmental starts at 6am to 25c for a toasty warm defrosted car!

User avatar
Nubo
Posts: 4498
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Brake lights in B mode

Thu Apr 09, 2015 10:03 am

LeftieBiker wrote:How is it different from driving a standard shift car in one of the low gears, and taking your foot off the gas...?


Yeah, LEAF regen isn't any stronger than 3rd-gear engine braking on most of the manual-transmission cars I've had, even though most of them had engines of less than 2 Liter displacement.

That said, motorists seem to have become increasingly impatient over the last decade or so. Perhaps it's just the ubiquity of antilock brakes and directional stability systems that allows them to feel safe while cutting things closer. In any case as EVs become more mainstream it's probably a good idea for the DOT to come up with some rate of regen-induced deceleration past which a brake light must be activated. The EV knows speed and regen intensity and can easily calculate deceleration rate. A standard for brake-light activation would be a good thing.
I noticed you're still working with polymers.

knightmb
Posts: 420
Joined: Mon Jan 12, 2015 7:41 pm
Delivery Date: 15 Sep 2013
Leaf Number: 414897
Location: Franklin, TN

Re: Brake lights in B mode

Thu Apr 09, 2015 2:15 pm

Nfuzzy wrote:Almost got rear ended again tonight. I think it's crazy that the brake lights don't come on any time your foot is completely off the accelerator when in B mode. After all people gently tap their brakes all the time with less deceleration and yet the lights come on.

If this happens at night, your tail lights are already on. You increase car distance at night for that exact reason, so I agree with the others here, you just had the bad luck of having drivers behind you that don't know how to drive.

RePo
Posts: 107
Joined: Sat Oct 13, 2012 8:55 am
Delivery Date: 28 Mar 2013
Leaf Number: 404201
Location: Houston, TX

Re: Brake lights in B mode

Thu Apr 09, 2015 2:37 pm

That's why I have a DVR in the back window. I already have their license plate and the fact that their on the phone while tailgating me.
Found my super black 2013 Leaf.

Y8UYGAS
Posts: 2
Joined: Mon Jan 23, 2017 6:50 pm
Delivery Date: 24 Jan 2017

Re: Brake lights in B mode

Mon Jan 23, 2017 7:22 pm

I think this would be a great idea. The B mode is plenty powerful to warrant brake lights. The argument that people should be paying attention is lame. People DON'T pay attention (I also cycle commute) and in the dark it is hard to judge speed differences. I've driven mostly manual trans cars before this and would never use the engine braking as often as with the Leaf. I would coast down hills and to stop signs to increase fuel savings, there was little to benefit from engine braking for normal driving.

arnis
Posts: 751
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: Brake lights in B mode

Tue Jan 31, 2017 4:53 am

No. Up to 30kW regen is acceptable without brake lights. It is just smooth deceleration.
No surprises.
There is no data that suggests Leaf's get rear ended more due to regen.

But going way above 30kW it gets more reasonable.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

Durandal
Posts: 315
Joined: Wed Sep 21, 2016 8:55 am
Delivery Date: 22 Sep 2016
Leaf Number: 025018
Location: Central Arkansas

Re: Brake lights in B mode

Tue Jan 31, 2017 7:56 am

RePo wrote:That's why I have a DVR in the back window. I already have their license plate and the fact that their on the phone while tailgating me.

Good point. I need to add my rear "dash cam" to my Leaf. I keep dawdling.
Pulled the trigger on going EV on 10/2016 with a 2012 Leaf, and a Tesla Model 3 reservation expected to receive in June 2018.

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