Recent Topics
amazon missing package. how often?
by WhyMe
07/17/18 12:15 AM
Filter Minder naysayers!
by ThunderOne
07/16/18 09:57 PM
Is there a 1 piece 75 Ohm to 300 Ohm coa connector
by daves66nova
07/16/18 08:46 PM
Help me choose camper wheels
by spasm3
07/16/18 08:44 PM
2012 Ford 3.0 V6 Kendall GT1 5W-20 7295 mi.
by AITG
07/16/18 08:19 PM
FCP Euro Oil change...which oil for N62 BMW
by TXCarGeek
07/16/18 07:48 PM
Suggestions on HM Oil to treat consumption
by shurguywutt
07/16/18 07:44 PM
Another headlight "restoration" using 3M kit
by 92saturnsl2
07/16/18 07:42 PM
Switching to QS Ultimate 5w30
by oilchangeguy
07/16/18 07:18 PM
6L80 pan with drain plug
by 04SE
07/16/18 07:00 PM
Fly or drive 2700 miles for company training
by Mr Nice
07/16/18 06:42 PM
Censored for [censored]
by Pajero
07/16/18 06:25 PM
Lexus SC430 Factory Repair Manual Set
by law3500
07/16/18 06:10 PM
How to get the online price at Walmart?
by Oldtom
07/16/18 05:27 PM
Cylinder head thickness?
by Hemispheres
07/16/18 05:06 PM
Finish Kare question
by 007
07/16/18 04:51 PM
ArmorAll wax wipes
by avacado11
07/16/18 03:45 PM
Meguiars products on special for Prime Day has
by SirTanon
07/16/18 03:15 PM
Most Expensive 18 Front wheel drive ,cheapest RWD?
by andyd
07/16/18 03:00 PM
My advance auto gold battery life (story)
by edwardh1
07/16/18 02:21 PM
Newest Members
Denniso, roadwarur, Auzoo2, Greaser73, Mitsu_Joe
65497 Registered Users
Who's Online
44 registered (aleneros, Bailes1992, bbhero, Black_Thunder, Bullwinkle007, 3 invisible), 1066 Guests and 41 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65497 Members
67 Forums
287203 Topics
4791151 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4575096 - 11/15/17 02:59 PM Regenerative braking yay/nay?
MoneyJohn Offline


Registered: 03/01/12
Posts: 178
Loc: Southern NY
I am not too sure if this is a right forum for this question. Admins can feel free to move accordingly.

This question is on my mind for a while. One of my vehicles has regenerative braking whereas other one does not. I personally do not like regenerative braking, esp for city driving. Many times I go from a light to the next one without my foot on an accelerator, the car just rolls. Whereas that is not possible in Forester because of regenerative braking. Sometimes I have to push pedal even on a downward slope.

What do others feel about regenerative braking? What are the benefits that I have failed to realize?

Many thanks in advance.
_________________________
2015 Subaru Forester 2.5i Premium w/ EyeSight
2006 Nissan Sentra 1.8S Special Edition

Top
#4575105 - 11/15/17 03:07 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
Eddie Offline


Registered: 12/07/03
Posts: 9649
Loc: Florida, Cape Coral
You get away with idling from light to light? I didn't realize 2006 Foresters had regenerative braking. I thought it was used in electric and Hy-bread vehicles only. Enlighten me. Ed
_________________________
CX5 Touring 2.5L :-)

Top
#4575123 - 11/15/17 03:19 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
nthach Offline


Registered: 01/02/04
Posts: 3977
Loc: California
Unless Subaru installed some sort of KERS or the "mild" hybrid system off the XV Crosstrek Hybrid, I doubt you have any provision for regenerative braking.

The Forester's CVT control logic probably incorporates better hill sensing and will hold back a "range" or two to keep it going steady down hill. Most automatics/CVTs have grade logic control that theoretically helps going up and down hill. In my experience the system does work well in some but I've always had to manually shift the Subies I've driven to get some decent acceleration up and deceleration down.

Top
#4575143 - 11/15/17 03:32 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
Cujet Offline


Registered: 02/15/03
Posts: 7217
Loc: Jupiter, Florida
I think you mean that the engine is still commanded to produce some power, even while braking. Manufacturers do this to keep catalytic converters warm and effective.

I prefer a vehicle that cuts fuel flow on throttle lift.

Try selecting neutral when decelerating. You might find that the engine is FAR above idle with the brakes applied. I find this annoying.
_________________________

Top
#4575151 - 11/15/17 03:35 PM Re: Regenerative braking yay/nay? [Re: nthach]
ag_ghost Offline


Registered: 12/08/10
Posts: 626
Loc: SF Bay Area, CA
Originally Posted By: nthach
Unless Subaru installed some sort of KERS or the "mild" hybrid system off the XV Crosstrek Hybrid, I doubt you have any provision for regenerative braking.

The Forester's CVT control logic probably incorporates better hill sensing and will hold back a "range" or two to keep it going steady down hill. Most automatics/CVTs have grade logic control that theoretically helps going up and down hill. In my experience the system does work well in some but I've always had to manually shift the Subies I've driven to get some decent acceleration up and deceleration down.

FWIW, Our 2015 Honda CR-V with a CVT exhibits this behavior coming on significant inclines in the Bay Area. My wife and I really like it. The engine tach also seems to align with this system. I've driven a friend's Tesla Model S (now departed); THAT had regnerative braking on flat surfaces ... not trivial to acclimate imho.

Kevin
_________________________
Kevin
63 Galaxie 500, 390; dad bought it new...
99 Accord V6
15 CR-V
04 Accord I4, MT(!)

Top
#4575162 - 11/15/17 03:46 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
Ethan1 Offline


Registered: 12/29/14
Posts: 1639
Loc: 'murica
I didn't even know there was a Forester hybrid shrug

Top
#4575177 - 11/15/17 03:52 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7485
Loc: S California
The 3rd gen company Prius in on the original brakes ad over 200K miles. It works just fine. Once in a while, you can feel it change over at just under 10 mph but it's not a problem. You can barely feel it if at all and then only once in a great while.

Top
#4575203 - 11/15/17 04:21 PM Re: Regenerative braking yay/nay? [Re: OneEyeJack]
TheKracken Offline


Registered: 04/18/17
Posts: 515
Loc: Fort Worth TX
Originally Posted By: OneEyeJack
The 3rd gen company Prius in on the original brakes ad over 200K miles. It works just fine. Once in a while, you can feel it change over at just under 10 mph but it's not a problem. You can barely feel it if at all and then only once in a great while.


My 2ed gen got it's first brake job at 238k miles. My 3ed gen is still on it's originals as well.
_________________________
2011 Prius 96k miles RLI 5w20
97 Toy T100 4x4: amsoil 0w20 242k Miles
04 Toy Sienna awd: Pennzoil 0w20 281k Miles

Top
#4575215 - 11/15/17 04:34 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
gathermewool Offline


Registered: 01/09/09
Posts: 6050
I think you mean engine-braking. One thing I LOVE about our Subies, is that they engine-brake well. Great for reducing gas consumption and brake wear.

Regenerative braking turns an electrical motor into a generator, so that the production of energy to refill the batteries causes the car to slow down, vice the brakes. This allows the car to slow down AND supply juice to the battery, extending the batteries range.

Top
#4575231 - 11/15/17 04:49 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
EdwardC Offline


Registered: 11/14/13
Posts: 1886
Loc: Chicago, IL
The LEAF has two settings for the amount of regen when coasting. The newest 2018 LEAF is reported to have the capability to come to a complete stop, so you can essentially drive with just one foot on the gas pedal.

In the 'D' setting on my 2016 model, it will coast freely when the gas pedal isn't pressed, with very minimal regen. in the 'B' (brake?) mode, when I let off the gas, it'll slow down a lot more, regenerating much more power. If I'm in 'B' mode and want to decelerate slower, I'll press the throttle just a little bit and it'll coast more freely.

Regen doesn't have to be limited to a gas/electric hybrid, it conceptually just means that the kinetic energy is being stored for future use. Could be charging a battery, storing compressed air, spinning a flywheel, heating something up, etc.

Since the Forester doesn't appear to be a hybrid, my guess is that you're feeling the engine braking.

I might be wrong on this, but in the past, when coasting, the computer would have to put in some amount of throttle/fuel to keep the engine idling. Newer cars, in search of fuel economy, can completely shut down all fuel input, requiring the momentum of the car to keep the engine spinning while it effectively just compresses/pumps air. I believe this is what CuJet is saying.

Top
#4575234 - 11/15/17 04:53 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
MCompact Offline


Registered: 07/21/02
Posts: 4189
Loc: KY
I like the regenerative braking on our i3; you can almost drive with just one pedal. It also works pretty well on the BMW iPerformance PHEVs.
_________________________
Mine:
2014 M235i
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2016 i3 REX
2009 Cooper Clubman

Son's
2009 328i

Buy what makes you smile...

Top
#4575359 - 11/15/17 06:30 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
HangFire Offline


Registered: 08/21/13
Posts: 2506
Loc: Central Maryland
Originally Posted By: MoneyJohn
What do others feel about regenerative braking? What are the benefits that I have failed to realize?


One thing I've learned from driving many kinds and brands of cars, is that how one manufacturer tunes one model has little/nothing to do with another. For example when I first had a GM car automatic downshift to help me compression brake, I was shocked because I had driven mostly Ford automatics (which would have upshifted just to be obnoxious, because: Ford). My Toyota likes to coast forever, but if I ease on the brakes slightly, it'll downshift too. And Hyundai... who the heck knows what that transmission was going to do next.

Point being, it's not one "regenerative braking" feel across all so-equipped cars.
_________________________
Various musings: http://hangfire.net

Top
#4575460 - 11/15/17 07:58 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
Nick1994 Online   content


Registered: 02/19/13
Posts: 10280
Loc: Phoenix, AZ
I think in your case it's a CVT thing
_________________________
2015 Hyundai Sonata 2.4L 80k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 228k Mobil 1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k Mobil 1 HM 10w40 & Fram Ultra

Top
#4575477 - 11/15/17 08:12 PM Re: Regenerative braking yay/nay? [Re: MoneyJohn]
UncleDave Offline


Registered: 06/02/14
Posts: 1703
Loc: Ca.
My lexus transmission has an engine braking mode - more conducive to one foot driving with stronger regeneration and engine compression braking.

Interesting to note that its more efficient to practically coast under deceleration - than run in engine braking/ high regeneration mode.

UD
_________________________
Uncle Dave
Cat 3126/2 MB3500/Titan/RX400H/17 Ridgeline
700HP V10/ 725HP BBC/ Raptor 700/ KFX450/ YZ250/Onan 8K/ Cat3011C

Top
#4575553 - 11/15/17 09:35 PM Re: Regenerative braking yay/nay? [Re: UncleDave]
MCompact Offline


Registered: 07/21/02
Posts: 4189
Loc: KY
Originally Posted By: UncleDave
My lexus transmission has an engine braking mode - more conducive to one foot driving with stronger regeneration and engine compression braking.

Interesting to note that its more efficient to practically coast under deceleration - than run in engine braking/ high regeneration mode.

UD


When I put my 2 Series in Eco Pro mode the engine rpm drops to idle when coasting- down to @15 mph; I've found I can bump up my commuting fuel economy by 1-2 mpg depending on traffic.
_________________________
Mine:
2014 M235i
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2016 i3 REX
2009 Cooper Clubman

Son's
2009 328i

Buy what makes you smile...

Top
Page 1 of 2 1 2 >