Free Republic
Browse · Search
General/Chat
Topics · Post Article

To: ProtectOurFreedom
Tesla (and other EV makers) use regenerative braking where braking converts a lot of the kinetic energy to potential energy stored in the battery. That is the huge advantage of EVs, especially city buses, where it is constant start/stop all day long. It’s not much of an advantage for EVs outside towns and cities where you go long distances without braking.

True, although there are still large losses involved in that. It helps, but any braking is still mostly a waste of your kinetic energy. Coasting to a light is much more efficient, although that doesn't work with EVs. I don't know if you've ever driven a Tesla, but there is no coasting in it - the second you let off the gas, the electric motors are dragging, greatly slowing you down. You have to keep constant pressure on the pedal to maintain speed.
47 posted on 12/21/2020 7:21:01 AM PST by Svartalfiar
[ Post Reply | Private Reply | To 36 | View Replies ]


To: Svartalfiar

Yes, there’s no free round-trip on energy...something about the Second Law of Thermodynamics if I recall correctly. ;>) But regenerative braking DOES capture a lot of the kinetic energy that otherwise would be converted to heat in the brakes. That’s how EVs get such high “mileage” claims.

Never driven a Tesla, but that would certainly change the way you drive. That sounds like race car driving — you are either accelerating or decelerating, there is no coasting.

With a gas engine, I watch stop lights WAY ahead of me and start coasting up to them way in advance. There is a little compression braking, but not much. I try to time it so I can never come to a full stop if possible.

This is really helpful for passenger comfort rather than going full speed to the stoplight, slamming on the brakes, waiting and then jack rabbit start. It also helps fuel economy.


48 posted on 12/21/2020 8:40:10 AM PST by ProtectOurFreedom ("Inside Every Progressive Is A Totalitarian Screaming To Get Out" -- David Horowitz)
[ Post Reply | Private Reply | To 47 | View Replies ]

Free Republic
Browse · Search
General/Chat
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson