Paulj
Standard Member
I've noticed that I get quite of lot of regen. when actually braking, as opposed to allowing the kers to slow the car down, great, but can anyone tell me how that actually works?
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I understand that, but how do the brakes make electricity when applied?
It sounds like the motor has different levels - we know about KERs 1, 2 and 3 - suppose as you're seeing a higher current when braking, the this is essentially a level 4? Which would mean that the one foot driving concept could be possible in the MG (via software?)Yes, I get that the motor acts as a generator when in 'overun' mode, however that doesn't explain why, when already slowing, with regen showing a positive current, applying the brakes quite hard will increase the positive current, according to the needle anyway.
I think pressing the brake pedal actually does not - at first - apply brakes, but allows the wheels to spin the motor creating regen instead. I believe it does this because the car is more "drive by wire" and complicated alogrithms are in play, so the ECU decides what method to use to slow the car. A sharper pedal press will activate the brakes. I see similar behaviour in our current Mitsubishi PHEVSurely applying the brakes will take some load off the regen rather than applying more?
Exactly this. My Leaf can get up to 30kW in regen. If you demand more braking force, it starts to apply the physical brakes. The blend between regen and physical braking is almost unnoticeable. Physical braking is blended in as speed drops, taking over fully somewhere below 15mph because the wheels can't spin the motor fast enough to take enough energy to slow the car down.KERS 1,2,3 are set levels of regen braking.
The brakes use the max regen available before any brake pads make contact.
'Applying the brakes' doesn't mean that the brake pads are used. The car will progressively increase the regen level as you press the brake pedal and will not use the friction brakes until maximum regen is achieved.Surely applying the brakes will take some load off the regen rather than applying more?
It can't be just my car, next time you all have a drive, do an actual test and see if this happens. Obviously you won't be braking for very far, so it is pretty momentary, unless descending a steep hill of course.
Page 168 of the (LR) manualI've noticed that I get quite of lot of region when actually braking, as opposed to allowing the kers to slow the car down, great, but can anyone tell me how that actually works?
Yeah, I was hoping that when they do the brake light fix for KERS, they would up KERS3 to the max at the same time. Seems not though.It sounds like the motor has different levels - we know about KERs 1, 2 and 3 - suppose as you're seeing a higher current when braking, the this is essentially a level 4? Which would mean that the one foot driving concept could be possible in the MG (via software?)
Think I already posted elsewhere that my Ampera rear discs and pads had to be replaced at about 50k due to being worn down because they'd more or less seized through lack of use.The friction brakes can actually suffer from rust because they are used so little. A mechanic at my Hyundai dealership told me that he saw an Ionic (first generation) with 100,000 miles and the disks and pads were like new.