Yogi62
Posts: 184
Joined: Sat Jan 12, 2013 7:29 pm
Delivery Date: 13 Apr 2013
Leaf Number: 405771
Location: Boston

brake mode = brake light?

Sat Feb 23, 2013 11:59 am

In a 2013 in brake mode, if you are slowing down by using regen braking, does it light the brake lights even if you don't hit the brake pedal? Driving a 2012 I am a bit worried that cars behind me aren't aware how much I might be slowing down/by just lifting off the throttle in Eco mode.

Thanks!

User avatar
ttweed
Posts: 1090
Joined: Tue Sep 07, 2010 8:31 am
Delivery Date: 01 Apr 2011
Leaf Number: 1317
Location: La Jolla, CA
Contact: Website

Re: brake mode = brake light?

Sat Feb 23, 2013 3:01 pm

I don't have a 2013, but the brake lights do not come on in my 2011 unless you actually push the brake pedal. Unless they reworked the regen function radically for 2013, you have nothing to worry about with slowing down when lifting off the throttle. The braking effect in the Leaf from regen is not any stronger than the engine compression braking that takes place in an ICE car on throttle lift. Anyone behind you should be able to react to such minor deceleration without any signal, just as they do for an ICE car.

TT
Tom Tweed
La Jolla, CA
Plowshare Media
2011 SLe #1317 del. 4/1/11
1st bar lost at 31,953 miles
2nd bar lost at 38,685 miles
3rd bar lost at 50,711 miles
4th bar lost at 59,758 miles after 64 months
Battery replaced at 61,307 miles.

User avatar
TomT
Posts: 10645
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: brake mode = brake light?

Sat Feb 23, 2013 3:03 pm

Agreed. My manual BMWs actually had stronger compression braking than the Leaf has regen braking...
ttweed wrote:I don't have a 2013, but the brake lights do not come on in my 2011 unless you actually push the brake pedal. Unless they reworked the regen function radically for 2013, you have nothing to worry about with slowing down when lifting off the throttle. The braking effect in the Leaf from regen is not any stronger than the engine compression braking that takes place in an ICE car on throttle lift. Anyone behind you should be able to react to such minor deceleration without any signal, just as they do for an ICE car.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

Publius
Posts: 141
Joined: Thu Dec 27, 2012 10:27 pm
Delivery Date: 04 Jan 2013
Leaf Number: 025447
Location: Rochester, NY

Re: brake mode = brake light?

Sat Feb 23, 2013 4:31 pm

I find that I'm more aware of my surroundings when I'm driving a car with a manual transmission or my LEAF. Occasionally I tap the breaks if I'm worried that the car behind me isn't paying close enough attention. Usually I don't find it to be a problem, though.
2015 Pacific Blue e-Golf SEL
Former 2012 Cayenne Red LEAF SL
Member of the 100 Mile Club

Geraldk
Posts: 35
Joined: Thu Jan 17, 2013 12:49 am
Delivery Date: 22 Dec 2012
Leaf Number: 026909
Location: Long Beach, CA
Contact: Website

Re: brake mode = brake light?

Sat Feb 23, 2013 11:53 pm

I was thinking that when you take your foot off go pedal it should light the first set of lights and as car slows down the lights would grow up or down depending on regen. I read that the BMW does this.

User avatar
TomT
Posts: 10645
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: brake mode = brake light?

Sun Feb 24, 2013 9:45 am

The BMW EV has far more aggressive regen that the Leaf, even the 2013, so it probably makes more sense in their case.
Geraldk wrote:I was thinking that when you take your foot off go pedal it should light the first set of lights and as car slows down the lights would grow up or down depending on regen. I read that the BMW does this.
Last edited by TomT on Mon Feb 25, 2013 10:29 am, edited 1 time in total.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

kovalb
Posts: 373
Joined: Tue Jun 28, 2011 12:37 pm
Delivery Date: 09 Apr 2014
Location: Phoenix

Re: brake mode = brake light?

Mon Feb 25, 2013 10:14 am

13MY B-mode is like downshifting an ICE powered car with a tranny. The brake lights do not come on.
Had six Nissan LEAFs in five years. Hope to get another.
Retired Nissan Employee (NTCNA-AZ). Opinions expressed here are my own.

User avatar
TomT
Posts: 10645
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: brake mode = brake light?

Mon Feb 25, 2013 10:31 am

I drove a 2013 this weekend and was actually surprised at how little additional regen there was in B... I had expected a bigger difference.
kovalb wrote:13MY B-mode is like downshifting an ICE powered car with a tranny. The brake lights do not come on.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

GregH
Posts: 860
Joined: Fri Jul 01, 2011 4:16 pm
Delivery Date: 13 Jun 2011
Leaf Number: 26967
Location: Irvine, CA

Re: brake mode = brake light?

Mon Feb 25, 2013 3:10 pm

TomT wrote:I drove a 2013 this weekend and was actually surprised at how little additional regen there was in B... I had expected a bigger difference.
kovalb wrote:13MY B-mode is like downshifting an ICE powered car with a tranny. The brake lights do not come on.
How did it compare to the ECO mode on the '11-12 cars? Still little or no regen at high SOCs? The Leaf is the only EV I've ever driven that so obnoxiously limits regen at high SOCs. Try taking a Chevy Volt with a full charge and throw it in "B" mode.. now THAT is regen.. Even at low SOCs the Leaf regen is kindof wimpy.
As far as the brake lights, all the AC Propulsion cars have incredible regen and at higher levels, the brake light does come on and a light on the dashboard lights up to let the driver know. Not sure if the Mini-E has the same setup.
'17 blue Volt Premier w/ACC
'12 SL black Leaf
'11 SL blue Leaf
RAV4-EV 2002-2005
Gen1 & Gen2 EV1 1997-2003
PV 2.4Kw, 10kWh lithium battery SCE TOU-DA

User avatar
TomT
Posts: 10645
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: brake mode = brake light?

Mon Feb 25, 2013 4:10 pm

The car I got to drive for about an hour had a SOC of 70 percent when I received it so, unfortunately, I had no way of evaluating regen at higher SOCs...
GregH wrote:How did it compare to the ECO mode on the '11-12 cars? Still little or no regen at high SOCs? The Leaf is the only EV I've ever driven that so obnoxiously limits regen at high SOCs.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

Return to “Engineering”