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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum Start stop paradox
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      05-23-2013, 07:10 AM   #1
BMWrules7
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Start stop paradox

So, if I drive my car with ASS disabled, will my starter last forever since its beefed up? How about the engine? Will it last forever too?
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      05-23-2013, 08:02 AM   #2
Luigi524TD
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Possible that the starter will ... even on a short drive (say less than 10 miles in suburbia) my engine goes through the stop/start/stop cycle about 30 times. The most annoying is when I approach a red traffic light and am stopped for about 10-15 seconds and just as it's ready to turn green - the engine stops!!

I just turned 3,000 miles so next trip to the dealer will be to reset it to "off unless selected on". Until then I usually shift to "S" to defeat the stop-start cycle.
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      05-23-2013, 09:03 AM   #3
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Quote:
Originally Posted by BMWrules7 View Post
So, if I drive my car with ASS disabled, will my starter last forever since its beefed up? How about the engine? Will it last forever too?
Does any engine or starter last forever?
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      05-23-2013, 08:18 PM   #4
BMWrules7
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Quote:
Originally Posted by The X Men
Quote:
Originally Posted by BMWrules7 View Post
So, if I drive my car with ASS disabled, will my starter last forever since its beefed up? How about the engine? Will it last forever too?
Does any engine or starter last forever?

There is only one way to know. And neither you nor I will be on this planet long enough to answer your question properly.

But, the paradox here is that by NOT using a system (ASS) designed to save the environment, you may be really saving the environment far more by having a working engine that has been over-engineered to withstand countless brutal stop start cycles and thus this engine will stay running in a car decades longer instead of suffering a pre-mature death decaying in a landfill.
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      05-23-2013, 10:09 PM   #5
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Do modern BMWs really still use an electric starter for ASS? I thought all cars these days supply fuel to the cylinders when ASS kicks in and the ignition system fires the cylinders that are in compression to restart the motor. In other words the electric starter is only used when the car is first started or if it sat for a long time in traffic with ASS. The fuel in the cylinders should be good for several minutes waiting for a spark.
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      05-24-2013, 12:49 AM   #6
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Quote:
Originally Posted by Krash7172 View Post
Do modern BMWs really still use an electric starter for ASS? I thought all cars these days supply fuel to the cylinders when ASS kicks in and the ignition system fires the cylinders that are in compression to restart the motor. In other words the electric starter is only used when the car is first started or if it sat for a long time in traffic with ASS. The fuel in the cylinders should be good for several minutes waiting for a spark.
Thats not right its deffinately the starter motor being used.
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      05-24-2013, 07:51 AM   #7
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Quote:
Originally Posted by Krash7172 View Post
Do modern BMWs really still use an electric starter for ASS? I thought all cars these days supply fuel to the cylinders when ASS kicks in and the ignition system fires the cylinders that are in compression to restart the motor. In other words the electric starter is only used when the car is first started or if it sat for a long time in traffic with ASS. The fuel in the cylinders should be good for several minutes waiting for a spark.
I think Mercedes use that system, the re-start is smoother by firing up the cylinder in compression.
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      05-24-2013, 07:55 AM   #8
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Quote:
Originally Posted by BMWrules7 View Post
There is only one way to know. And neither you nor I will be on this planet long enough to answer your question properly.

But, the paradox here is that by NOT using a system (ASS) designed to save the environment, you may be really saving the environment far more by having a working engine that has been over-engineered to withstand countless brutal stop start cycles and thus this engine will stay running in a car decades longer instead of suffering a pre-mature death decaying in a landfill.
Hmmmm, if you can design a starter or an engine that can last forever, you will be a very rich man.
Many owners do not like the ASS system, but there is really no need to justify why you dont like it. The system is not perfect, it has its glitches, thats why I dont like it. The design intention is good, but the technology is not ready yet. Like many innovation, it will get better.
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      06-21-2013, 03:26 PM   #9
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Question: if I take my 528i to the dealership, do they give me the option to switch the feature to already off when I start the car?? If that makes sense
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      06-21-2013, 04:59 PM   #10
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Quote:
Originally Posted by big worm
Question: if I take my 528i to the dealership, do they give me the option to switch the feature to already off when I start the car?? If that makes sense
You are asking if the dealer will apply the iDrive patch that will keep ASS set at the last mode selected on subsequent engine starts, right?

Well, the general consensus for European countries is that this update will no longer be applied by the Centre since the patch adversely alters the published km/L statistics.

For the USA, some folks have reported that this patch is no longer free, but can be applied if you are willing to pay hourly rates.

My thought: Just get used to pressing the ASS defeat button the moment after you press the start button.


Sooner or later, you will condition yourself to keeping the ASS disabled.

Also, anytime you realise (after the engine shuts off) that ASS is turned on, always wait for your car to restart on its own (using the normal ASS restart cycle). Why?

Because, even though you don't subscribe to this green nonsense, you may as well make the most of it and save the petrol anytime you become aware that ASS is actually enabled after the fact.

Also, make sure you set your commute to and from work as a "trip." Then select your trip when you drive off to work in the morning.

Why? Assuming your commute is longer than 20 minutes, when you get back in your car and press the
Start button in the evening, your car will immediately prompt you to see if you want to be navigated to home. Click "yes" right away.

Then, as you prepare to get yourself ready for departure, your car will silently be evaluating traffic conditions to get you home on the best route.
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      06-22-2013, 03:47 AM   #11
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or you can go the coding route. I recently set my to be last setting. So if I leave it off when I shut the car down, that's the state it is in when you start again.
if you google coding, you'll find plenty of information on that
Easiest though as mentioned previously is just to get used to switching off when you start the car .
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      06-23-2013, 02:40 AM   #12
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Mine came switched off and have never attempted to turn it on. From what I'm reading, I probably never should.
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      06-23-2013, 06:24 PM   #13
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Quote:
Originally Posted by The X Men View Post
I think Mercedes use that system, the re-start is smoother by firing up the cylinder in compression.
That's right yeah, Mercedes' ASS is far superior. That uses a very brief turn of the starter motor (if required) and fires the cylinder.

However, what I wonder is; how does that work in the diesel engines? Surely that must be purely starter motor reliant?
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