Auto stop start kicks in too early

matt666 · 07-22-2018, 02:37 PM

As above really, anyone else find this? When crawling up to a red light gradually slowing down the ASS will often kick in and turn the engine off when I’ve not actually stopped moving, maybe doing 1mph.

I had ASS on my F30 and that worked fine, left a second or so before actually stopping before turning the engine off

530iDriver · 07-22-2018, 02:55 PM

That hasn't been my experience when driving the car in ECO Pro individual, but then again, I don't use ECO mode or ASS all the time.

Boba · 07-22-2018, 03:03 PM

I find the reverse. If I creep towards a standstill it seems to delay or even prevent the auto stop. I think that hesitating on the pedal gives the software a clue that you might not actually stop after all.

bpbaud · 07-22-2018, 03:20 PM

Here's the way mine behaves: I'm braking for a car that stops in front of me. As I approach it, I ease up on the brake a little to prevent a jerk when it actually stops. (I've heard this referred to as limo braking.) As I do that, or maybe just before I do that, the engine stops then immediately restarts. The system seems to think that I was coming to a stop then changed my mind. Annoying.

Dephead2004 · 07-22-2018, 04:39 PM

Agreed bpbaud, perfect description. I am so used to limo braking that puts hard to get out of the habit. I think the ASS is just a tad too sensitive and needs to alloys the car to actually stop not just nearly stop.

Osheatwo · 07-22-2018, 07:38 PM

For the last two days I been driving in ECO Pro Mode and noticed this a few time as well. I keep this feature off so had not noticed it until now.

roadske · 07-23-2018, 12:19 AM

I noticed this also. I was told by the dealer that diesels stopngo are more ‘rough’ - but I’m not sure I believe that answer. (Drive a 530d)
What engines are you guys driving?

matt666 · 07-23-2018, 01:26 AM

Quote:

Originally Posted by bpbaud

Here's the way mine behaves: I'm braking for a car that stops in front of me. As I approach it, I ease up on the brake a little to prevent a jerk when it actually stops. (I've heard this referred to as limo braking.) As I do that, or maybe just before I do that, the engine stops then immediately restarts. The system seems to think that I was coming to a stop then changed my mind. Annoying.

That is how mine behaves. It didn’t do that on the 330d I had so something has changed. Hopefully it can be fixed with a software update

Dephead2004 · 07-23-2018, 01:43 AM

Mine is a petrol

Dephead2004 · 07-23-2018, 01:44 AM

Quote:

Originally Posted by Osheatwo

For the last two days I been driving in ECO Pro Mode and noticed this a few time as well. I keep this feature off so had not noticed it until now.

Are you thinking that it's in eco pro mode only?

Bibbles · 07-23-2018, 03:23 AM

Start car, put into Sport+ mode. Forget ASS or Eco Poo mode exist.

nsa100 · 07-23-2018, 04:24 AM

Quote:

Originally Posted by Bibbles

Start car, put into Sport+ mode. Forget ASS or Eco Poo mode exist.

I agree with this

But seriously, the stop start could do with maybe a 1-2 seconds delay to make sure you are fully stopped.

Osheatwo · 07-23-2018, 05:07 AM

Quote:

Originally Posted by Dephead2004

Quote:

Originally Posted by Osheatwo

For the last two days I been driving in ECO Pro Mode and noticed this a few time as well. I keep this feature off so had not noticed it until now.

Are you thinking that it's in eco pro mode only?

Not sure because I don't use the feature I keep it off. If you use ECO Pro Mode it kick in automatic even when it still turned off

I will try it in comfort mode and see if it does it.

TreyWaters · 07-23-2018, 06:04 AM

Quote:

Originally Posted by bpbaud

Here's the way mine behaves: I'm braking for a car that stops in front of me. As I approach it, I ease up on the brake a little to prevent a jerk when it actually stops. (I've heard this referred to as limo braking.) As I do that, or maybe just before I do that, the engine stops then immediately restarts. The system seems to think that I was coming to a stop then changed my mind. Annoying.

While I was waiting on the boat with my car, I asked someone on the Genius line about it. He had no clue, and said take it to the dealer. When I was taking redelivery, my agent at the Performance center knew exactly what I was talking about. He just said don't feather the brakes when stopping (which is the term I learned for what you described as 'limo braking'.)

9 months later, and I still can't kick the habit of feathering - it's just too ingrained. So, yeah, I'm still plagued by the auto-stop-start stopping then immediately restarting.

530iDriver · 07-23-2018, 12:36 PM

Do any of you really see a benefit in using ASS? Significantly better mileage?

JohnEnglish · 07-23-2018, 12:57 PM

Quote:

Originally Posted by 530iDriver

Do any of you really see a benefit in using ASS? Significantly better mileage?

ASS is not about improving mileage, it's about reducing ground level emissions.

en1gma · 07-23-2018, 01:42 PM

Quote:

Originally Posted by matt666

As above really, anyone else find this? When crawling up to a red light gradually slowing down the ASS will often kick in and turn the engine off when I’ve not actually stopped moving, maybe doing 1mph.

I had ASS on my F30 and that worked fine, left a second or so before actually stopping before turning the engine off

I have exactly the same problem. Mine is a 530i petrol. All previous cars (incl. 2 x F10) never suffered from this.

My habit is also to 'feather the brakes', as someone else mentions.

ADS-UK · 07-23-2018, 05:24 PM

Quote:

Originally Posted by JohnEnglish

Quote:

Originally Posted by 530iDriver

Do any of you really see a benefit in using ASS? Significantly better mileage?

ASS is not about improving mileage, it's about reducing ground level emissions.

In city traffic, ASS could save up to 10% fuel. That's the official line.

JohnEnglish · 07-23-2018, 07:33 PM

Quote:

Originally Posted by ADS-UK

In city traffic, ASS could save up to 10% fuel. That's the official line.

Interesting, I always see ASS pitched as a way to reduce ground level green house emissions.

ztx84 · 07-24-2018, 02:10 AM

I think there is a display in the trip computer somewhere that shows the total time the ASS has been engaged for... It would be interesting to see how long the stop/start cuts the engine for over the course of a full tank of fuel. I imagine in city driving it could mount up to be a fairly significant number.

LexProf · 07-25-2018, 02:25 PM

Quote:

Originally Posted by matt666

As above really, anyone else find this? When crawling up to a red light gradually slowing down the ASS will often kick in and turn the engine off when I’ve not actually stopped moving, maybe doing 1mph.

I had ASS on my F30 and that worked fine, left a second or so before actually stopping before turning the engine off

I notice the same thing in my M550i. The car will shut down before I come to a full stop. Can be quite annoying in traffic which is at a crawl because everyone is not actually stopped, but my car will shut down. Grrr.

Dephead2004 · 07-26-2018, 01:27 AM

Confirmed that it is only a nuisance in eco pro mode and not comfort. Cardiff traffic huh!

Anyone got a fix to add a second to cut out in eco pro?

07-22-2018, 02:37 PM	#1
matt666 Private First Class 9 Rep 161 Posts Drives: 330d Join Date: Apr 2014 Location: Nottingham, UK iTrader: (0)	Auto stop start kicks in too early As above really, anyone else find this? When crawling up to a red light gradually slowing down the ASS will often kick in and turn the engine off when I’ve not actually stopped moving, maybe doing 1mph. I had ASS on my F30 and that worked fine, left a second or so before actually stopping before turning the engine off
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07-22-2018, 02:55 PM	#2
530iDriver Colonel 1708 Rep 2,539 Posts Drives: 2017 BMW 530i Join Date: May 2018 Location: Florida iTrader: (0)	That hasn't been my experience when driving the car in ECO Pro individual, but then again, I don't use ECO mode or ASS all the time. __________________ 2017 BMW 530i, Sport Line,Alpine White, Canberra Beige Sensatec, 19 inch V-Spoke wheels, basic plain Jane build with no options whatsoever..... "Less is more". Before: 2011 BMW 328i E90 sedan, Platinum Bronze Metallic, Dakota Brown leather, 17 inch wheels, 6-speed auto, N52 6 Cyl inline N/A goodness....
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07-22-2018, 03:03 PM	#3
Boba New Member 2 Rep 14 Posts Drives: 520D Join Date: Jul 2018 Location: U.K. iTrader: (0)	I find the reverse. If I creep towards a standstill it seems to delay or even prevent the auto stop. I think that hesitating on the pedal gives the software a clue that you might not actually stop after all.
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07-22-2018, 03:20 PM	#4
bpbaud Private 3 Rep 53 Posts Drives: 530i Join Date: Nov 2017 Location: US iTrader: (0)	Here's the way mine behaves: I'm braking for a car that stops in front of me. As I approach it, I ease up on the brake a little to prevent a jerk when it actually stops. (I've heard this referred to as limo braking.) As I do that, or maybe just before I do that, the engine stops then immediately restarts. The system seems to think that I was coming to a stop then changed my mind. Annoying.
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07-22-2018, 04:39 PM	#5
Dephead2004 Lieutenant 179 Rep 548 Posts Drives: G30 520i Join Date: Feb 2018 Location: UK iTrader: (0)	Agreed bpbaud, perfect description. I am so used to limo braking that puts hard to get out of the habit. I think the ASS is just a tad too sensitive and needs to alloys the car to actually stop not just nearly stop.
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07-22-2018, 07:38 PM	#6
Osheatwo Second Lieutenant 205 Rep 252 Posts Drives: BMW M3 Comp Xdrive Join Date: May 2018 Location: Atlanta iTrader: (0) Garage List 2021 BMW X5 M50i [10.00] 2023 BMW 330E [10.00]	For the last two days I been driving in ECO Pro Mode and noticed this a few time as well. I keep this feature off so had not noticed it until now.
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07-23-2018, 12:19 AM	#7
roadske New Member 10 Rep 23 Posts Drives: BMW 5 series 2017 Join Date: Apr 2017 Location: Denmark iTrader: (0)	I noticed this also. I was told by the dealer that diesels stopngo are more ‘rough’ - but I’m not sure I believe that answer. (Drive a 530d) What engines are you guys driving?
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07-23-2018, 01:43 AM	#9
Dephead2004 Lieutenant 179 Rep 548 Posts Drives: G30 520i Join Date: Feb 2018 Location: UK iTrader: (0)	Mine is a petrol
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07-23-2018, 03:23 AM	#11
Bibbles Banned 779 Rep 1,228 Posts Drives: G31 540i MPPSK Join Date: Jul 2014 Location: Herts iTrader: (0)	Start car, put into Sport+ mode. Forget ASS or Eco Poo mode exist.
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07-23-2018, 12:36 PM	#15
530iDriver Colonel 1708 Rep 2,539 Posts Drives: 2017 BMW 530i Join Date: May 2018 Location: Florida iTrader: (0)	Do any of you really see a benefit in using ASS? Significantly better mileage? __________________ 2017 BMW 530i, Sport Line,Alpine White, Canberra Beige Sensatec, 19 inch V-Spoke wheels, basic plain Jane build with no options whatsoever..... "Less is more". Before: 2011 BMW 328i E90 sedan, Platinum Bronze Metallic, Dakota Brown leather, 17 inch wheels, 6-speed auto, N52 6 Cyl inline N/A goodness....
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07-24-2018, 02:10 AM	#20
ztx84 First Lieutenant 185 Rep 301 Posts Drives: 2022 M4 Competition Xdrive Join Date: Jan 2018 Location: Devon, UK iTrader: (0)	I think there is a display in the trip computer somewhere that shows the total time the ASS has been engaged for... It would be interesting to see how long the stop/start cuts the engine for over the course of a full tank of fuel. I imagine in city driving it could mount up to be a fairly significant number.
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07-26-2018, 01:27 AM	#22
Dephead2004 Lieutenant 179 Rep 548 Posts Drives: G30 520i Join Date: Feb 2018 Location: UK iTrader: (0)	Confirmed that it is only a nuisance in eco pro mode and not comfort. Cardiff traffic huh! Anyone got a fix to add a second to cut out in eco pro?
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