KERS; how to or how not to use...

If the ZS has KERS (or regen) then I can't see why they wouldn't employ it for ACC.

Does the ZS have a power meter 0-100% for discharge and negative for KERS or regen?
 
But surely KERS is activated when you press the brake pedal as in the MG4? Just that you have the option to press harder for regular braking.
No. KERS in MG ZS activates when you take your foot off the acccelerator. The brake pedal has no effect on regenerative braking, so it should be called regenerative deceleration.
 
Max KERS is always beneficial, with One Pedal Driving being the easiest driving mode, as your hardly need to brake in town, which really should be the default.
Coasting with minimum KERS is the most beneficial, as acceleration requires more energy from the battery than you put into it with deceleration due to regenerative slowing.
 
I would think that high KERS over a short period is less efficient than low KERS over a longer period (as in bringing the vehicle from one speed to a lower speed) due to losses involved in the KERS system at higher currents
 
Coasting with minimum KERS is the most beneficial, as acceleration requires more energy from the battery than you put into it with deceleration due to regenerative slowing.
Maybe so, but OPD gives maximum car control as all wheels are driven at all times and I would think any coasting benefit to acceleration would be minimal / unnoticeable.
 
Maybe so, but OPD gives maximum car control as all wheels are driven at all times and I would think any coasting benefit to acceleration would be minimal / unnoticeable.
No, it's quite significant actually. You can recoup 65% to 75% of the energy from the vehicle's motion, but you need 100% of the energy to get it moving up to the same speed again. Letting the vehicle roll further means you travel further for less, giving you a better m/kWh.
 
No, it's quite significant actually. You can recoup 65% to 75% of the energy from the vehicle's motion, but you need 100% of the energy to get it moving up to the same speed again. Letting the vehicle roll further means you travel further for less, giving you a better m/kWh.
Interesting, are there any studies showing that conclusively? I’m getting the expected range on my Xpower, driving enthusiastically with OPD always on, of 3.4ml kw/hr
 
Interesting, are there any studies showing that conclusively? I’m getting the expected range on my Xpower, driving enthusiastically with OPD always on, of 3.4ml kw/hr
Well, it's the laws of thermodynamics, but if you do an internet search, you'll find it. Or you can do it yourself by looking at the m/kWh meter as you drive along. This time of year I'm getting 4 to 5 m/kWh using coasting, and upping the KERS as I come to a stop. (It was easier in the Hyundai cars as they had paddles on the steering wheel)

When I see a red traffic light in the distance, if I coast to a stop, I can get 0.2 to 0.3 m/kWh increase. Driving up to the lights and using KERS 3 to stop, I only get 0.1 to 0.2 m/kWh. Obviously it depends on the distance you coast.
 
Well, it's the laws of thermodynamics, but if you do an internet search, you'll find it. Or you can do it yourself by looking at the m/kWh meter as you drive along. This time of year I'm getting 4 to 5 m/kWh using coasting, and upping the KERS as I come to a stop. (It was easier in the Hyundai cars as they had paddles on the steering wheel)

When I see a red traffic light in the distance, if I coast to a stop, I can get 0.2 to 0.3 m/kWh increase. Driving up to the lights and using KERS 3 to stop, I only get 0.1 to 0.2 m/kWh. Obviously it depends on the distance you coast.
Impressive! I wonder if eco mode and energy saving modes could do something similar, in future?
 
Impressive! I wonder if eco mode and energy saving modes could do something similar, in future?
I believe most studies say that rapid deceleration at high speed is best done with regenerative braking and slow decelaration is best done with coasting.
 
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