The hybrid "evolution" theory doesn't work. I think Toyota's approach
was right, for the time: make a substantially more efficient gas engine.
They did a brilliant job.
But to migrate that to an EV is difficult. First, you still need a
fairly substantial gas engine, if you want the vehicle capable of long
distance freeway travel. Once the battery is depleted, the ICE needs to
be sufficient on its own. Second, if you want a larger battery, you now
have to find additional space - you still need the ICE and the
transmission and all the other junk. And more weight for a larger
battery. It just doesn't work. The 40-50 mile range hybrids are probably
the limit this technology can go.
I think people in general are quite aware of EVs now, especially seeing
teslas on the road. it seems people are waiting for enough range and
quick enough charging that they don't have to be concerned any more than
they are driving and ICE-V. We're getting close to that. The other
factor is price, which is dropping (for what you get) every year. It's
coming ! We don't need a transition vehicle.
(And I realize I can be over optimistic, but I feel strongly about this
:)
Peri
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------ Original Message ------
From: "Lee Hart via EV" <[email protected]>
To: "(-Phil-) via EV" <[email protected]>
Cc: "Lee Hart" <[email protected]>
Sent: 03-Apr-21 11:53:43 AM
Subject: Re: [EVDL] free piston generators
(-Phil-) via EV wrote:
The difference is in the Chevy Volt, just like the Prius and other similar
hybrids, they use a power-split device to directly connect the ICE to the
wheels. Obviously this was chosen because unlike the series hybrid, there
are less conversion stages before the power meets the road. However, in
the case of Obrist's technology, the benefits of only having the
generator(s) connected means they can do clever tricks to optimize the
efficiency that allows it to always run at the most optimal speed.
How is it different than the Prius-type power split device? It can drive the
vehicle on pure electric, or pure ICE, or both in any combination.
When the Prius came out, it was 99% ICE -- it had a range of 5 miles as an EV,
and 500 miles as an ICE. This was mostly due to the small battery (about 1 KWH).
My first thought was that over time, hybrids would increase battery capacity,
and decrease ICE capacity. But that hasn't happened. 20 years later, the best
EV-like hybrids only have a 20-40 mile EV range, and still a 400-500 mile ICE
range. So they are still 90% ICEs.
It would seem that the best way to "wean" the general public away from ICEs and
fossil fuels would be to make hybrids that can do 90% of their driving as EVs, and only
use their ICE on rare occasions (like a long trip once a month).
But no one seems to even consider such an approach.
Lee
-- All children are born engineers. Watch them at play. They're not
just playing; they're experimenting, building and learning. That's
engineering! Then we get them in school and squash it out of them.
(Geoffrey Orsak, Southern Methodist University dean of engineering)
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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