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Old 05-14-2016, 10:41 AM   #1
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Does EOC (engine off coasting) work with EVs?

Anyone have any direct experience experimenting with EOC with their EV?

Thanks,
Doug
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Old 05-14-2016, 02:57 PM   #2
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How can engine off coasting work on a car with no engine?
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Old 05-14-2016, 03:26 PM   #3
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Quote:
Originally Posted by Draigflag View Post
How can engine off coasting work on a car with no engine?
I dunno. That's why I'm asking someone as smart as you, Paul.

I was wondering if an EV can increase it's range (save electricity) by pulsing power to the electric motor instead of applying continuous power. This pulsing power would sorta be line EOC.
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Old 05-14-2016, 09:58 PM   #4
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You would be better to do Neutral Glides in an EV. There is no need to turn off the key as there is no engine to shut off. A Neutral Glide will disable regenerative braking, so you will be able to glide farther.
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Old 05-14-2016, 10:19 PM   #5
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This doesn't make any sense.
An EV has a battery. That battery is a kinetic energy storage device.
Why would you want to eliminate the storing of the kinetic energy?
To shorten the car's range?
What I think you do not understand is; When you drive an electric motor. That electric motor acts as a generator. What it generates, gets stored in the battery.
When you drive an engine. It doesn't generate anything.
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Old 05-14-2016, 10:33 PM   #6
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Because of the laws of thermodynamics. The process of taking the kinetic energy, converting to electric, storing in the battery, then retrieving it later and converting back to kinetic has quite a bit of parasitic loss. It is far better to leave the energy in the wheels whenever possible.
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Old 05-16-2016, 06:00 AM   #7
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And regenerative braking slows the car down. If you aren't coming to a stop, it is better to glide at speed.

Depending on make, model, and drive mode, you might need to put the EV in neutral. They don't have to have regenerative braking to stimulate transmission drag, and foot off accelerator is the same as being in neutral; I think the EV1 worked this way.

Then others can have one pedal driving. Foot off accelerator is full regen brake that is strong enough to bring the car to a stop. Apply more pedal for less braking until you get to a point where power is applied. There is a neutral/glide area between brake and power. The friction brakes operated by the other pedal are for holding the car on steep hills and emergency stops.
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