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7 Series - F01 / F02 (2009 - current)
The new re-designed 7 series F01 / F02 leads off the BMW Fxx chassis code!

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  #1  
Old 07-23-2011, 06:15 AM
GTZ GTZ is offline
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Brake energy regeneration

Hello from Greece.
As BMW says all F01 models are equipped with Brake Energy Regeneration system.This system has an extra blue coloured indicator in the rpm meter of the instrument panel.
Although my cars' specs describe this option (code 1CD),there is no indicator into the instrument panel.
Is this possible to make it shown in my car?

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  #2  
Old 07-23-2011, 06:21 AM
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swb3 swb3 is offline
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I believe your car does not have it for some odd reason. Both of my cars have the blue band that shows this feature and it is not selectable, or can not be turned on or off (to my knowledge). Is yours an early model that might not have had the feature?
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Old 07-23-2011, 06:44 AM
GTZ GTZ is offline
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It's a 2008 model but for sure it has this equipment.It's described in the equipment sheet that comes with my car.If someone types my VIN in a BMW dealer he will have all my cars options inclunding "1CD" (brake energy regeneration).
I will contact the dealer soon...and I'll find out what's happening here...
Thanks for your answer!
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  #4  
Old 07-23-2011, 08:57 AM
Deutsch100 Deutsch100 is offline
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The first batch of very early F01 models in the USA did NOT have the Energy Regeneration feature. It's great though, and really, really helps keep front wheels much cleaner (greatly reduced brake dust).
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Old 07-25-2011, 08:16 AM
CC Brown CC Brown is offline
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Brake energy regeneration is a misnomer. All it means is when your car is braked a clutch runs the alternator. The brake don't regenerate anything! So if you think the brakes are generating electricity and helping you stop and using less brakes and thus less brake dust. Dream on!
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  #6  
Old 07-25-2011, 10:33 AM
GeneJ GeneJ is offline
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Quote:
Originally Posted by CC Brown View Post
Brake energy regeneration is a misnomer. All it means is when your car is braked a clutch runs the alternator. The brake don't regenerate anything! So if you think the brakes are generating electricity and helping you stop and using less brakes and thus less brake dust. Dream on!
I will Dream On, this is my 10th BMW, my 5th 7 and it is the only one that has had very little dust.
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  #7  
Old 07-25-2011, 01:15 PM
Deutsch100 Deutsch100 is offline
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Quote:
Originally Posted by CC Brown View Post
Brake energy regeneration is a misnomer. All it means is when your car is braked a clutch runs the alternator. The brake don't regenerate anything! So if you think the brakes are generating electricity and helping you stop and using less brakes and thus less brake dust. Dream on!

NOT Dreaming Dude!! The 2010 750i is my 8th NEW BMW since 2004, and even after one week of daily driving, I barely have a light coating of brake dust.

I have also had 2 Hybrid Lexuses...and same thing! Almost no brake dust, even with daily driving in miserable Los Angeles traffic.

Brake Regeneration makes for dramatically reduced dust!!!
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  #8  
Old 07-25-2011, 05:15 PM
eclou eclou is offline
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well if there is a clutch driving the alternator then the deceleration energy is being sucked up by the alternator and you don't have to apply as much brake pressure. Makes sense that there is less dust generated.
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Old 07-25-2011, 05:42 PM
chrischeung chrischeung is offline
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How does this relate to less braking for the discs? It's purely at the engine to alternator.

"This energy is created by the generator (also known as the alternator) which converts the engine's power output into electricity."

http://www.bmw.com/com/en/insights/t...eneration.html
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  #10  
Old 07-25-2011, 06:28 PM
eclou eclou is offline
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Quote:
Originally Posted by chrischeung View Post
How does this relate to less braking for the discs? It's purely at the engine to alternator.

"This energy is created by the generator (also known as the alternator) which converts the engine's power output into electricity."

http://www.bmw.com/com/en/insights/t...eneration.html
reading that description makes me agree that it is not true brake regeneration. However the alternator clutch engages when you are braking, so it is decelerating the rpms of the engine thru parasitic drag that does not exist when the car is accelerating. By that definition every single conventional car uses the alternator to enhance braking! What it really should be described as is acceleration enhancement where the clutch for the alternator disengages upon acceleration - in most cars the A/C clutch already disengages for acceleration to reduce drag
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  #11  
Old 07-25-2011, 07:18 PM
chrischeung chrischeung is offline
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Right - so I'd expect more brake dust. The car is heavier, there is less retardation, and there is more power when accelerating, giving you a higher speed before braking.

BMW may have updated their brake compounds in recent years. I'm noticing less brake dust on my M3 as well than I would expect. I may be just driving less, or there's less traffic after I moved?
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Last edited by chrischeung; 07-26-2011 at 05:40 AM.
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  #12  
Old 07-26-2011, 01:23 AM
GTZ GTZ is offline
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Take a look here.
It says clearly that "BMW brake energy regeneration" means that battery is NOT CHARGING when you accelerate!!!It is charging "when your BMW is braking, coasting or decelerating".This feature saves fuel because the altenator is not in operation during acceleration!!!
It hasn't anything to do with the brake pads and the produced dust of course!

In other "normal" cars the altenator charges the battery when coasting,braking,decelerating PLUS accelerating.This is the difference...

Last edited by GTZ; 07-26-2011 at 01:33 AM.
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  #13  
Old 07-26-2011, 07:11 AM
Deutsch100 Deutsch100 is offline
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Quote:
Originally Posted by GTZ View Post
Take a look here.
It says clearly that "BMW brake energy regeneration" means that battery is NOT CHARGING when you accelerate!!!It is charging "when your BMW is braking, coasting or decelerating".This feature saves fuel because the altenator is not in operation during acceleration!!!
It hasn't anything to do with the brake pads and the produced dust of course!

In other "normal" cars the altenator charges the battery when coasting,braking,decelerating PLUS accelerating.This is the difference...

Well, seriously...like I said 8 NEW BMWS since 2004, and the 2010 750i was the first BMW or German car that did not make much brake dust. Just like my 2 Lexus Hybrid RXs...almost no brake dust. There must be something with this Brake Regeneration feature, that all us NON BMW engineers do not know.

Honestly after a week of dreadful Los Angeles traffic, there is hardly even a coating of brake dust on the F01. With our M6, Range Rover, G55....one 5 mile trip to the grocery store, and without kidding...you could clean the wheels with a rag and simple green. Not so with the 750i!!!
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  #14  
Old 07-26-2011, 09:40 AM
GeneJ GeneJ is offline
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I agree with Deutsch100, brake dust is no longer a issue. I will add that the brake pedal does seem a little strange ( like the car will not coast to a stop like a normal car) and the pedal is very sensitive at low speeds. Not the best feel...but no dust.
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  #15  
Old 07-26-2011, 09:50 AM
GTZ GTZ is offline
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Brake dust has to do with the brake pad material.Nothing else...
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  #16  
Old 07-27-2011, 11:49 AM
canuckdon canuckdon is offline
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perhaps the alternator has a much larger 'drag' on the system than other cars or previous generation BMW's since it has to recharge the battery in only a portion of the driving time. That would explain less brake dust.
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Old 09-29-2011, 09:18 AM
sgcan sgcan is offline
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How do you know whether the brake energy regeneration function is working or not if there is no an extra blue coloured indicator in the engine rpm meter?

I know 2011 BMW 535i has this indicator on under the engine rpm meter, but 2011 X5 has not. When you release the gas pad or apply brake, the point goes to blue section.

Can this function be active/inactive or setup by BMW dealer?
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  #18  
Old 09-30-2011, 04:25 AM
bruno787 bruno787 is offline
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mine is a Sept/October 2008 production and its Does Not Have the Efficient Dynamics Blue Band, this i believe started in late 2009 model's clusters.

but it does have Brake energy regeneration, it just doesnt have the display in the cluster. no biggeeee for me
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  #19  
Old 09-30-2011, 12:05 PM
the-pm the-pm is offline
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On my 2011 car you can turn this indicator on and off, it is not that clear what the setting in the iDrive actually does...

1. "Settings"
2. "Info display"
3. "Additional indicators"

Energy recovery - The energy of motion of the vehicle is converted to electrical energy while coasting. The vehicle battery is partially charged and fuel consumption can be lowered.
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  #20  
Old 09-30-2011, 05:56 PM
ruey220 ruey220 is offline
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Quote:
Originally Posted by GTZ View Post
Take a look here.
It says clearly that "BMW brake energy regeneration" means that battery is NOT CHARGING when you accelerate!!!It is charging "when your BMW is braking, coasting or decelerating".This feature saves fuel because the altenator is not in operation during acceleration!!!
It hasn't anything to do with the brake pads and the produced dust of course!

In other "normal" cars the altenator charges the battery when coasting,braking,decelerating PLUS accelerating.This is the difference...
if that is the case then why would it be "greener" as the active efficiency hype indicates. it should therefore be actually lit blue when you are accelerating because it is saving more gas with less load due to no alternator working. back in the days when i rode with cheap people who had a belief they would waste gas with the AC running, they only ran it when the car was on the freeway.

frankly i think this is probably a cheap marketing gimmick on the car, i don't see a difference with this bs when the car still only gets like 13/18 MPG.
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  #21  
Old 10-04-2011, 10:58 PM
joejensen joejensen is offline
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Here is why it's greener.
1) Less alternator load on the engine when driving.
2) Alternator charges when trying to slow the vehicle. Uses the car's momentum to charge the battery

What would have been energy converted to heat (waste) becomes energy converted to battery charging. Also because the alternator is converting the momentum energy of the car, you need less brakes so less dust. My service advisor who also races BMWs claims the pad compound is the same as the E65/E66 so the difference must be the regenerative braking.

If you have not owned a BMW before you can't appreciate the difference in dust. The other poster who said a 5 mile drive would make the wheels dirty was right. Now not at all...joe
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  #22  
Old 06-21-2013, 06:57 AM
krupel krupel is offline
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Hi,

are there any New findings regarding the Blue Break Energy Regeneration Display ?

I have the Same wish for my Old f01.

(Software is up to Date)

Thank you
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  #23  
Old 06-21-2013, 07:25 AM
bruno787 bruno787 is offline
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i have an early production 740Li, i dont have the blue brake energy display on my cluster as well, my car has just been updated with the latest software including videos for idrive owner's manual. so the blue brake energy display cannot be programmed for the cluster.
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  #24  
Old 06-21-2013, 08:01 AM
krupel krupel is offline
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Quote:
Originally Posted by bruno787 View Post
i have an early production 740Li, i dont have the blue brake energy display on my cluster as well, my car has just been updated with the latest software including videos for idrive owner's manual. so the blue brake energy display cannot be programmed for the cluster.


Why are you so sure, that there is no coding possibility?

What is this Video Function for?

Greetings
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  #25  
Old 06-21-2013, 08:30 AM
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The blue regen field is a software programming item in the KOMBI. 2009 F01's did not have this feature. Any 2010+ should show it based on its programming.
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