Re: Is primary basis for hybrid mileage efficiency stop and sta rt energy recovery?

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Re: Is primary basis for hybrid mileage efficiency stop and sta rt energy recovery?

David Beard
Actually, it is finding balance between capabilities....system optimization....

the Electric motor has full torque from zero speed...so it is used for acceleration, while the ICE is used for the constant speed demand...

using the electric motor allows the ice to be downsized, and for it to be operated closer to its sweet spot...

The ICE has enough capacity to top off the battery charge so you don't have to have as large a battery pack...which is why hybrids can be made cheaper than BEV's...fewer expensive batteries...

Under severe events, like hill climbing or passing at freeway speeds it may use both the ice and the electric motor....the electric motor would pull too much energy from the battery pack to handle this event by itself, and the ICE (which was downsized) would not likely have enough power to pull this manuever in a reasonable time....so the battery pack can stay within safe operating limits and the electric motor is used kinda like a turbo boost....

IT'S the level at which the vehicle is hybridized that determines its ultimate efficiency....the prius is  a full hybrid (charge sustaining), while the hybrid ford Explorer would be a mild hybrid (basically a joke in my book)

They did a study that determined that the big suvs would be of the most benefit to hybridize...basically a 10%increase in efficiency on an SUV would equate to a greater environmental benefit than a 10%increase on a smaller car...this was due to it's higher consumption and the number of them on the road...it was also determined that it was easier to absorb the cost of the necessary technology int the larger vehicles....
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Please end thread (was primary basis for hybrid mileage efficiency)

EVDL Administrator
Please try to limit EVDL discussions to vehicles which actually use
electricity as a fuel.  This isn't true of any of the current factory
"hybrids" - they all run on gasoline.  Their manufacturers seem rather proud
of the fact that "you never have to plug them in."  

Besides, these vehicles are discussed endlessly on many dozens if not
hundreds of other forums around the net.  We really don't need to discuss
them here.

If you want to discuss converting one of these vehicles to a true hybrid
("plug hybrid") or BEV, now that's something else again.  But I don't think
this is the right place to discuss why an ICE gets good mileage.  The Prius,
Escape, HCH, etc. are 100% ICEs.  They just happen to have electric
superchargers.

Please read the EVDL posting guidelines here :

http://evdl.org/help/index.html#conv

Thanks.

David Roden
EVDL Administrator
http://www.evdl.org/


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