Tim Green
Established Member
The brake lights do come on when using Kers only (no footbrake), but only on level 3 kers which I use all the time. You can check this by driving at night and looking in the rear view mirror.
Do the brake lights come on when the friction brakes are used to auto control the set speed under ACC do you know?The brake lights do come on when using Kers only (no footbrake), but only on level 3 kers which I use all the time. You can check this by driving at night and looking in the rear view mirror.
I've not used it for a while, but I think it does.My question was about automatic braking under ACC when regen is not used and the brake pedal is not depressed manually.
Yes ?I think our cars also have emergency braking warning rapid flash brake lights - I assume they work by sensing the rapid deceleration?
They come on when EBA (Emergency Brake Assist) comes into action i.e. when you press the brake pedal quickly, no need for sensing the deceleration. The EBA ECU monitors the speed of the pedal press via the potentiometer on the brake pedal (not how hard it's pressed).I think our cars also have emergency braking warning rapid flash brake lights - I assume they work by sensing the rapid deceleration?
Give it a tryI didn’t realise that - so it can be created whilst stationary by pressing the brake quickly? And what about the situation where you start off with gentle braking and then increase by slowing pressing but you end up with a lot of braking force and slowing down quite quickly?
The brake pedal def causes regen in my car.In my experience I have not noticed the brake pedal providing any additional regen. I always have it in kers 3.
This I think is unique to the mg.
In my Mitsubishi outlander phev and Lexus rx450h the brake pedal increase the amount of regen first before the friction brakes kick in. I can’t recall what it did in the first gen Nissan Leaf.
Hi Cocijo, yes I have found with ours if you watch the amps, when you apply the brake pedal lightly the regen cuts in more, i.e. you can feel the car slowing down faster and the amps going back into the battery increases over and above what your Kers setting (we use 3) is.This has been discussed in other threads But as far as I can tell no dedicated post.
My main queries are around the relationship between application of the footbrake and regen.
Does the first part of depressing the pedal always engage regen first and then if further depressed the friction brakes also?
We know that we get regen when we release the accelerator and that this is incremental.
If in regen3 we lift fully off, does then applying the footbrake give even more regen braking? A sort of extra boost that is more than fully lifted off regen3? I don’t really notice this when driving if it does.
I’ve read in a few posts that using the footbrake engages more regen - I think someone has measured this? Is there a direct link between the footbrake and regen or do the two systems work completely independently of each other? I also believe Miles mentioned this on one of the podcasts but can’t find his commnents.
It makes sense to use regen instead of friction brakes where possible but how does this work on the MG when the footbrake is applied?
Regen is definitely speed and momentum related and I wonder if applying the footbrake and reducing the speed gives the impression of additional regen? I’m just surmising here and giving my experiences - I don’t know the answer - i’m interesting to hear what members think.
Yes - this seems to be the general consensus. Are you sure it’s not just increasing as the car slows down because the regen is not linear and not due to the footbake being pressed?Hi Cocijo, yes I have found with ours if you watch the amps, when you apply the brake pedal lightly the regen cuts in more, i.e. you can feel the car slowing down faster and the amps going back into the battery increases over and above what your Kers setting (we use 3) is.