Stop start and braking

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monkeyhanger
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Re: Stop start and braking

Post by monkeyhanger »

That's the way stop-start with DSG is designed, like it or not. Add in the annoyance of stop-srart firing up the engine when the car in front has shuffled forward a foot while a traffic light is still red (thanks to the ACC system).

I switch stop start off every journey and only put it on when I know I'm in for a long wait e.g. roadworks.

With the battery drain the dashcam has in parking monitoring, the car rarely has the spare battery capacity to support stop start anyway.

Stop start works far better on a manual car where clutch pedal use governs stop start activation so you can anticipate a light change, have the engine fire up prior to the light change and only move off when you put the car into gear.

ACC works best with DSG, Stop Start works best with a manual box.
SRGTD
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Re: Stop start and braking

Post by SRGTD »

Andy Beats wrote: Tue Oct 20, 2020 8:47 am With regard to LED brake lights, the 'light technology' may well not result in dazzling as much as traditional bulbs on a 'bulb v bulb' basis, but manufacturers have more than made up for that by making ridiculously large brake lights.
Some cars have them run the full width of the tailgate, it's ridiculous and I get dazzled more by brake lights than ever before.
Audi is one car manufacturer that seems to have an obsession with illuminating the entire width of some of their cars. IMO you wouldn’t want to be sitting behind an A8 at night for very long with the driver applying the brakes (check out the YouTube video at around 2min 10sec to 2min 20sec). Audi’s A7 is pretty much the same, and there are probably other Audi models with similar rear end light shows.

https://www.youtube.com/watch?v=7slec58xdj4
Andy Beats
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Re: Stop start and braking

Post by Andy Beats »

SRGTD wrote: Tue Oct 20, 2020 10:00 am
Audi is one car manufacturer that seems to have an obsession with illuminating the entire width of some of their cars. IMO you wouldn’t want to be sitting behind an A8 at night for very long with the driver applying the brakes (check out the YouTube video at around 2min 10sec to 2min 20sec). Audi’s A7 is pretty much the same, and there are probably other Audi models with similar rear end light shows.

https://www.youtube.com/watch?v=7slec58xdj4
They also do those 'sweeping' indicators.
They almost make me physically ill, they're such a pile of wa....
SRGTD
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Posts: 2293
Joined: Sun Oct 11, 2015 9:40 pm
Drives: 2020 AW Polo GTI+, Pure White.
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Re: Stop start and braking

Post by SRGTD »

Andy Beats wrote: Tue Oct 20, 2020 10:45 am
SRGTD wrote: Tue Oct 20, 2020 10:00 am
Audi is one car manufacturer that seems to have an obsession with illuminating the entire width of some of their cars. IMO you wouldn’t want to be sitting behind an A8 at night for very long with the driver applying the brakes (check out the YouTube video at around 2min 10sec to 2min 20sec). Audi’s A7 is pretty much the same, and there are probably other Audi models with similar rear end light shows.

https://www.youtube.com/watch?v=7slec58xdj4
They also do those 'sweeping' indicators.
They almost make me physically ill, they're such a pile of wa....
Taking form over function a step too far IMO.
vc-10
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Re: Stop start and braking

Post by vc-10 »

monkeyhanger wrote: Tue Oct 20, 2020 9:35 amAdd in the annoyance of stop-srart firing up the engine when the car in front has shuffled forward a foot while a traffic light is still red (thanks to the ACC system).
This is the most annoying thing ever. I wish there was a way to turn it off. I don't see why they implemented it- it gets confused so often and kicks the engine back on for no reason. The most annoying thing is that the system on my Ibiza can 'see' the car in front of the car in front. Quite often at city traffic lights that car is able to go but the car in front of you isn't. So it kicks the engine back. Infuriating.
Nodster
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Re: Stop start and braking

Post by Nodster »

ryanponti wrote: Mon Oct 19, 2020 9:16 am
Nodster wrote: Sun Oct 18, 2020 1:20 pm
PO10ASH wrote: Sat Oct 17, 2020 9:03 pm Anyhow, I've found myself starting to put my car into N and then keeping my foot on the brake, but only when sat for awhile.
I don't think you need to do that, if you're keeping your foot on the brake just keep it in D. The clutch will be disengaged automatically so there's no wear to worry about by sitting stationary whilst in D. :) Saves you having to keep going from N > D. Fair enough if you wanted to apply the handbrake and lift off the brake.
I thought that this would be the case but the car does feel like its still trying to pull away even with the brake pressed hard hinting towards slight friction on the clutch. I put the active sport display on and if you leave the car in neutral the boost gauge shows 0.26-0.28 bar, if its in D its usually 0.34-0.38. I have sat there before and just switched between the two and you can see the change in boost.

I thought maybe by shifting into D the car thinks we are going to move so has prepared to set off so i came to stop whilst in D and it stayed in the 0.34-0.38 range then knocked it into N and it dropped back to 0.26-0.28. I know this isn't exactly a large increase in boost 1.7 PSI ish but it indicates to me that there is something causing the car to produce extra boost and my conclusion was extra friction in the drive-train as that is the only thing that is changing.
I wonder if the slight boost increase from "N" to "D" is perhaps as you say, preparing to move, but also for hill assist. So that extra boost is what helps hold / crawl? Dunno... just spit balling now. :)
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