Start-stop logic
Thread Starter
Audiworld Junior Member
Joined: Dec 2012
Posts: 38
Likes: 0
Start-stop logic
Hi
I kind of like the auto start/stop feature, but how it works looks a bit funny to me
It does not stop always, and sometimes it stops and then does not stop the next time I press the brakes. Also, I've noted that the engine only stays stopped for 1 minute.
Does anyone have a good feel on how the logic behind it works, what makes the OBC decide that now I'll stop the engine and why are longer stops not supported?
I kind of like the auto start/stop feature, but how it works looks a bit funny to me
It does not stop always, and sometimes it stops and then does not stop the next time I press the brakes. Also, I've noted that the engine only stays stopped for 1 minute.
Does anyone have a good feel on how the logic behind it works, what makes the OBC decide that now I'll stop the engine and why are longer stops not supported?
Super Moderator
Joined: Jul 2001
Posts: 13,980
Likes: 124
From: SE Massachusetts, U.S.
Stop/Start is determined by various factors such as engine temp, outside temp, energy load, etc. As the engine gets no water cooling when stopped for a period of time, it may determine that it needs to run at that point. Also, in my car at least, you have to press firmly down on the brake pedal for it to activate. Feathering the brakes to a gradual stop doesn't seem to activate it at all and just a bit less pedal pressure after stopping will deactivate it and the engine restart.
I'm not crazy about the feature and rarely have it activated.
I'm not crazy about the feature and rarely have it activated.
AudiWorld Member
Joined: Feb 2005
Posts: 394
Likes: 1
Here some specifics from Audi:
http://www.audiusa.com/com/brand/en/...m.browser.html
The start-stop function only works when …
•the driver’s door and the bonnet are closed
•the driver is wearing a seat belt
•the vehicle has been driven at faster than 4 km/h before stopping
•the vehicle is not pulling a trailer
In some cases the engine will not be switched off, for instance when …
•the engine temperature is still too low
•the difference between the interior temperature and the temperature selected via the air conditioning system is still too great
•the outside temperature is very high or very low
•the windscreen is being de-iced
•the optional parking aid or the optional park assist is activated
•the battery charge is too low
•the steering wheel is at a sharp angle or is being turned
•reverse gear is engaged
•the road is steep
The engine is started automatically by the system when …
•the vehicle rolls forward
•the windscreen is being de-iced
•there is a large difference between the interior temperature and the temperature selected via the air conditioning system
•the brake pedal has been depressed several times in succession
•the battery charge is too low
•power consumption is too high
Despite all this, I still like it and use it constantly.
The start-stop function only works when …
•the driver’s door and the bonnet are closed
•the driver is wearing a seat belt
•the vehicle has been driven at faster than 4 km/h before stopping
•the vehicle is not pulling a trailer
In some cases the engine will not be switched off, for instance when …
•the engine temperature is still too low
•the difference between the interior temperature and the temperature selected via the air conditioning system is still too great
•the outside temperature is very high or very low
•the windscreen is being de-iced
•the optional parking aid or the optional park assist is activated
•the battery charge is too low
•the steering wheel is at a sharp angle or is being turned
•reverse gear is engaged
•the road is steep
The engine is started automatically by the system when …
•the vehicle rolls forward
•the windscreen is being de-iced
•there is a large difference between the interior temperature and the temperature selected via the air conditioning system
•the brake pedal has been depressed several times in succession
•the battery charge is too low
•power consumption is too high
Despite all this, I still like it and use it constantly.
Audiworld Junior Member
Joined: Oct 2012
Posts: 53
Likes: 0
At first, I didnt like the feature at all.. I think I didnt trust it a whole lot. There was something a little unnerving about my car cutting off at a stop or light. I tried it for a few days, and slowly began to like it.
Now, for whatever reason, I love it.. I pretty much leave it on all the time.
Johnny
Now, for whatever reason, I love it.. I pretty much leave it on all the time.
Johnny
AudiWorld Senior Member
Joined: May 2002
Posts: 631
Likes: 2
From: Texas
I have been leaving it on all the time, but I'm not completely sold on it. I wanted to give it a chance since it's new to me. Anyway, but I think once summer hits in Texas, it won't be turning off very often!
AudiWorld Senior Member
Joined: Jul 2010
Posts: 797
Likes: 1
Thread
Thread Starter
Forum
Replies
Last Post
rentonrenton
Q5/SQ5 MKII Discussion
1
Oct 25, 2017 12:09 PM
sconney
Audi 90 / 80 / Coupe quattro / Cabriolet
15
Jun 17, 2003 04:13 AM
Steve S.
A4 (B5 Platform) Discussion
22
Jan 4, 1999 03:13 PM
