It also slows down via regen when coming up to a junction round about etc. and even if you are approaching a speed limit too fast. It is a good system but my only criticism is that I would prefer the regen/engine braking to be a little more severe as when to does cut in and slows the car it is too early and leaves you crawling to the junction if that makes sense!
It's a balancing act. Lift off too early, and as you said, end up needing throttle, lift too late, need to put brakes and I think engine wouldn't even switch off! Mine's a 30TFSI, and I feel that sometimes when approaching a roundabout from NSL speeds, engine braking even up to over 5k revs doesn't seem to slow the car down much if at all, but I can feel it when the battery is shown as charging (regen I guess).
I think it’s just a characteristic of the car that takes a little time to get used to. At first, it felt like the car and I were fighting for control. Now it seems to work well for the most part. Get it right and the car brings you into a roundabout at just the right speed to continue through or stop; or brings you into traffic lights with the engine off.
My understanding of the mild hybrid system is that there isn't an electric motor to power the cars forward motion, more that in circumstances where the car can coast, the engine can cut out and the power in the small hydrid battery can maintain the electrical systems that would otherwise draw power from the engine and also provide power to restart the engine via the alternator when you need to resume driving under engine power. That's why you lose a bit of speed when it kicks in on the flat.
In contrast to full hybrids, mild hybrid cars aren’t intended to be powered by the motor alone. The motor-generator is only used for regen braking and to stop, start and assist/boost the engine (and as an alternator). Personally, I view it more as a better auto-stop/start system than as a hybrid in the conventional sense.
i dont want to disable the crash prevention etc just that coasting thing. Hi. I quite like the 'artificial intelligence' and chuckle to myself when the car slows itself down when approaching a roubabout. One concern I have about that is that I don't think the brake lights come on as cars behind don't seem slow down. Maybe it's perhaps the drivers of those cars are less intelligent . As an aside, do you know of any threads about the failure of the stop/start function as the function on my car has stopped working.
Has it stopped working with the arrival of warmer weather? I find that if the aircon is working hard then the car will leave the engine running (to power the compressor, I guess). You could test this by setting the aircon to off whilst stopped with the engine running, to see if that allows the engine to cut out.
Hi. Possibly has coincided with the warmer weather but I tend not to use the aircon. A check of potential drain on battery shows only minimal functions in use. I think the issue coincided with an mmi reset rather than the warmer weather. The switch function is ok though (illuminates when I switch the function off).
That's interesting. I do have the heater temp on 'low'. I'll give that a go and see what happens. Cheers.
I found that if I had it on cruise control, sometimes at long downhill sections, engine would shut itself off, however the speed would increase. Eg...if I set it to 68mph, some downhill sections would increase the speed (with engine off) to about 70 plus. I think once it hits 72/73mph, the engine would restart to use the regen to brake to avoid 'overspeed.'
You need to put "S" on the gearbox to turn off the "coasting", pressing the button you mentioned disables only the start-stop when the car stops.
If it's in the front of the lights, or a slight wait yes. But when crawling in traffic especially say entering BW tunnel, the stop with engine off is like 1-3 seconds only. So in a slow moving traffic to cover the 3-400 meters, the engine would turn on and off maybe 30-40 times in a space of 5 mins. Not sure how good that is. However in other conditions like at normal traffic lights or roundabouts, yea, I don't bother turning it off, and let it do its thing.
I’ve noticed this, annoying with the air conditioning as well. It doesn’t pump as nicely when the engine is off.
Yes, on Eco AC mode it tends to still shut off the engine, although on On AC mode, more times than not, it would not turn off the engine.
I hope so but I dont think they do judging by the drivers getting really close to me when the car is regen braking. I think this frustrates other drivers thinking my brake lights aren't working. I have never noticed my brake lights come on empty unlit a roads when the car is regen braking. I havent had any mates follow me to confirm this and maybe I am wrong.
From my experience they do not illuminate, I always look in my rear view mirror when the regen braking is active, even when it’s at its strongest coming to a junction, I do not see any brake lights in reflection of peoples registration plates behind me until I begin physically braking.
I have a MY21 30 TFSI MHEV, and I 'don't believe' they come on. My observation though is from a double decker bus behind me and I couldn't see the lights come on (assuming regen you mean the mpg bar goes to green to charge the battery?) on the reflective bus front glass, but once I did press the brakes, I could def see it!
Just taking your foot off the accelerator might not activate the brake lights as the rate of deceleration is similar to engine braking (which would not activate brake lights on a conventional car).
