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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions Coasting in Eco Pro or Comfort mode to save fuel

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      05-26-2020, 04:24 PM   #23
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Quote:
Originally Posted by hamera View Post
You will see this blue car icon. You can activate coasting yourself by pulling the upshift paddle twice fairly quickly.
I was out for a longer run today and can confirm that you can ‘coast’ in Comfort and Adaptive drive modes.
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      05-28-2020, 02:59 PM   #24
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Hi,

Will try the rapid double upshift next time I'm on highway.

I enabled coasting in comfort by coding.

Here's what I coded, using E-Sys & ProLauncher, but should work with Bimmercode in Expert Mode:
* DKOMBI4 ECU
Anzeige_Configuration> 10Seglen_In_Comfort_Modus from 00 to 01
* HG_MGU:
Not sure which function --UPDATED
3008 FES>Global_Conf_Sailing from 00 to 01
3008 FES>Eff_Dyn_Sailing from 00 to 01
3009 Efficient _Dynamics>Sailing_Counter from 00 to 01

You end up with a check box to check on iDrive under SETTINGS, CAR

This will give you coasting in Comfort; you should already have in EcoPro (check box in SETTINGS, CAR,DRIVE MODE)

Hope that helps!
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      09-17-2020, 03:07 PM   #25
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Quote:
Originally Posted by RSnic View Post
Hi,

Will try the rapid double upshift next time I'm on highway.

I enabled coasting in comfort by coding.

Here's what I coded, using E-Sys & ProLauncher, but should work with Bimmercode in Expert Mode:
* DKOMBI4 ECU
Anzeige_Configuration> 10Seglen_In_Comfort_Modus from 00 to 01
* HG_MGU:
Not sure which function (HMI_SPEECH?)
Global_Conf_Sailing from 00 to 01
Eff_Dyn_Sailing from 00 to 01
Sailing_Counter from 00 to 01

You end up with a check box to check on iDrive under SETTINGS, CAR

This will give you coasting in Comfort; you should already have in EcoPro (check box in SETTINGS, CAR,DRIVE MODE)

Hope that helps!
Hi RSnic,

When you say you’re not sure which function, are you saying you’re not sure which of those three actually enables coasting? Thanks in advance
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      09-17-2020, 08:43 PM   #26
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All this sturm und drang for a sip of gas.

Why didn't you just buy all-electric to begin with?
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      09-18-2020, 02:57 AM   #27
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this does not happen with me. The engine literally shuts off if I'm coasting (like start/stop but in motion). I think this happens in both Comfort and Eco Pro, but don't quote me on that.
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      09-18-2020, 06:23 AM   #28
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X32G20 ,

Sorry for the confusion. No, not all; at the time when I made the original post, I couldn't remember what section of the Head Unit, those items were in & I mistakenly called "section" "function". The section is useful when searching with Bimmercode

See my original post, which I updated

Hope that helps!
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      09-18-2020, 09:15 PM   #29
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Quote:
Originally Posted by Eagle Creek View Post
Quote:
Originally Posted by SoFlo_Nick View Post
The only time i use ECO Pro is if I'm cruising with little traffic, Other than that I like to have quick access to power.
Agreed. Eco pro makes the throttle slow to respond. I found myself in a situation unable to overtake as quickly as I wanted and thereby hindering other traffic. That's why I don't use Eco Pro that often anymore.
While in Eco-pro, just push the lever in to DS and the car will accelerate just as fast as Sport mode.
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      11-08-2020, 07:04 AM   #30
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Quote:
Originally Posted by Eagle Creek View Post
Imo this would only be beneficial at modest declines for a reasonable amount of distance. At more steep declines keeping it in gear the weight of the car alone should keep it rolling with 0 usage of gas. Does the car indeed detect this and in this case choose the keep the engine connected to the wheels?

I drove a manual KIA in France last summer, went down a hill in second gear and didn't have to give any gas for almost 5 full minutes. Just going down in 2nd and breaking ever so slightly every now and then. Absolutely no gas needed.
It's a bit late to reply to this now, but engines are designed so that they save more fuel if you leave the car in gear and coast compared to putting the car in neutral and letting it freewheel. The engine shuts down the fuel flow even if the drive is engaged. It doesn't do that in neutral.
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      05-03-2023, 12:49 PM   #31
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For a change, I want to turn off coasting, as I understand correctly, I only have to do these 4 things, only the opposite...
Quote:
Originally Posted by RSnic View Post
* DKOMBI4 ECU
Anzeige_Configuration> 10Seglen_In_Comfort_Modus from 00 to 01
* HG_MGU:
Not sure which function --UPDATED
3008 FES>Global_Conf_Sailing from 00 to 01
3008 FES>Eff_Dyn_Sailing from 00 to 01
3009 Efficient _Dynamics>Sailing_Counter from 00 to 01
And is it possible to somehow enable the option in ECO Individual to have a checkbox to enable/disable coasting?
As in this photo:
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      05-03-2023, 03:11 PM   #32
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Quote:
Originally Posted by Eagle Creek View Post
Hey guys,



Conclusion: when the engine is not connected to the wheels, some fuel is needed to keep it running. However, when it is connected to the wheels, no fuel is needed to keep it running.

What am I not seeing here ?
No, an ICE engine without fuel cannot "keep running".
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      05-03-2023, 03:37 PM   #33
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Quote:
Originally Posted by Mason Hatcher View Post
No, an ICE engine without fuel cannot "keep running".
Perhaps "still rotating" is more appropriate.

We've had fuel cut off, on the over-run for 30-years or more, so no fuel is used with the drivetrain engaged.
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      05-04-2023, 05:31 AM   #34
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I dug up a thread from three years ago with a specific question...
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      05-05-2023, 02:01 PM   #35
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Quote:
Originally Posted by HighlandPete View Post
Perhaps "still rotating" is more appropriate.

We've had fuel cut off, on the over-run for 30-years or more, so no fuel is used with the drivetrain engaged.
I have read that several times and still don't know what you are saying.

Do you mean that the forward motion of the vehicle is enough to keep the engine turning, with the transmission engaged, even though the engine is not running because fuel is cut off?
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      05-05-2023, 02:27 PM   #36
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Quote:
Originally Posted by Mason Hatcher View Post
I have read that several times and still don't know what you are saying.

Do you mean that the forward motion of the vehicle is enough to keep the engine turning, with the transmission engaged, even though the engine is not running because fuel is cut off?
Yes, it is as simple as that. Typically the engine will start fuelling again just a few revs above idle, to ensure smooth transition back to running state. My first petrol motor with fuel cut off on the over-run, was a 1990 vehicle.
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      05-08-2023, 08:26 PM   #37
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Quote:
Originally Posted by HighlandPete View Post
Yes, it is as simple as that. Typically the engine will start fuelling again just a few revs above idle, to ensure smooth transition back to running state. My first petrol motor with fuel cut off on the over-run, was a 1990 vehicle.
Spot on. Some engines also have a system where if running light loads some of the cylinders will shut off. I think one of my Jaguar V8s and a Holden with the 5.7 litre V8 both shut down one bank of 4 cylinders when just gently cruising, i.e. they weren't being fuelled until you called for more power. The Jaguar in particular (a 2003 XJ8 X350 series with the 4.2 litre motor) was remarkably economical for such a large car.
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      05-09-2023, 07:33 AM   #38
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Question here:
Then, what about staying on Drive mode at the traffic light?
Do you think it will save more gas than being in Neutral position?
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      05-09-2023, 07:43 AM   #39
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I love "coasting" and passing people never touching the throttle. I will never understand why people brake going down a hill when there is one you are about to go back up just in front of it. Just let it ride buddy.
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      05-15-2023, 02:25 PM   #40
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Has anyone tried this on a 2019 330i? My car definately coasts in Eco Pro mode, and I coded the 4 settings above to enable it in Comfort mode (and ensured the new checkbox is checked) but I haven't been able to get it to coast in comfort mode.

Does it matter if you rapid double upshift via the paddles or the stick shifter? I'm just noticing the image from the Eco Pro screen showing the tip with the stick shifter and I'm wondering if thats what I have to use instead of the paddles which is what I've been trying with (using the stick shifter while in regular drive mode doesnt make sense to me when using the "upshift" term since its not in manual mode).
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      05-15-2023, 10:24 PM   #41
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Quote:
Originally Posted by RooR_CA View Post
Question here:
Then, what about staying on Drive mode at the traffic light?
Do you think it will save more gas than being in Neutral position?
I wouldn't have thought it would make the slightest bit of difference. If you want to save fuel, use the Auto Stop/Start. I know some on here hate it, but I use mine all the time, just overriding it by flicking the lever across to Sport if I ever feel the need (e.g. making a turn across traffic)
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      05-16-2023, 06:32 AM   #42
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Quote:
Originally Posted by Gaviatrix View Post
I wouldn't have thought it would make the slightest bit of difference. If you want to save fuel, use the Auto Stop/Start. I know some on here hate it, but I use mine all the time, just overriding it by flicking the lever across to Sport if I ever feel the need (e.g. making a turn across traffic)
Thx, yes it makes a lot of sense
Auto Start/Stop is the way to save fuel indeed.
I use it mainly when I have to do a quick stop in order to not turn off completely the engine (like a quick stop under 5 minutes).

In Traffic, I’d say, it would depend of traffic in your aera.
Got surprised a few times on ECO while I had to start quickly to avoid car coming and throttle was squishy with no response lol.

So for me Eco is definitely more a highway mode than a city one as the throttle respond very slowly.

BTW I like your technic of switching modes on purpose for scenario like I’ve just described.
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      05-16-2023, 10:06 PM   #43
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Quote:
Originally Posted by RooR_CA View Post
Thx, yes it makes a lot of sense
Auto Start/Stop is the way to save fuel indeed. I use it mainly when I have to do a quick stop in order to not turn off completely the engine (like a quick stop under 5 minutes).
In Traffic, I’d say, it would depend of traffic in your aera. Got surprised a few times on ECO while I had to start quickly to avoid car coming and throttle was squishy with no response lol. So for me Eco is definitely more a highway mode than a city one as the throttle respond very slowly. BTW I like your technic of switching modes on purpose for scenario like I’ve just described.
I drive in Adaptive pretty much all the time except on a long highway trip when I might select Eco. I find Eco too unresponsive for general use. If I'm just stopped at the lights or in traffic on my morning commute, the Auto Stop/Start function is unobtrusive and plenty quick enough to fire up. But I like the reassurance of just knocking the lever across when you know you're likely to need to pull away smartly. As an old manual (stick-shift) man I tend to regard the flappy paddles as toys I only play with on the open road. The removal of the gear selector from the centre console on the LCI cars is another black mark in my book.
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      11-10-2023, 10:11 PM   #44
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Quote:
Originally Posted by RooR_CA View Post
Question here:
Then, what about staying on Drive mode at the traffic light?
Do you think it will save more gas than being in Neutral position?
Older auto transmission definitely saved fuel by being in neutral. Most modern ones fully disengage when you are stopped and it's still in drive mode. I can't guarantee it but I would be absolutely shocked if it made an difference in the G20 with ZF transmission.
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