Hybrid Car – More Fun with Less Gas

Smart people buy Priuses - Page 14

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Posted by Bob & Holly Wilson on July 26, 2007, 1:18 pm
 



. . .

It isn't listed on the bill of sale nor the window sticker. The lying
"Marketing Firm" that claimed such nonsense is a fraud:

http://www.pacinst.org/topics/integrity_of_science/case_studies/hummer_v
ersus_prius.html

"Hummer versus Prius:
"Dust to Dust" Report Misleads the Media and Public with Bad Science"

Still the "Dust to Dust" report us find candidates for the "List of
Little Village Idiots."

Bob Wilson

Posted by mrv@kluge.net on July 26, 2007, 8:26 pm
 




The Prius uses NiMH for the hybrid batteries, and an AGM lead-acid
traditional 12v accessory battery.

The NiMH hybrid batteries are controlled by a very good battery-
management computer, such that it is never completely charged or
drained, which greatly impacts its lifespan.  As opposed to most
consumer products, which regularly are drained and then overcharged...


Here's the 2004 Toyota Prius Green Report (life cycle assessment):
http://www.toyota.co.jp/en/k_forum/tenji/pdf/pgr_e.pdf
(you'll need to download the Japanese fonts for your PDF reader in
order to read it, but the entire document is written in English.)

Over the lifespan of the Prius, when compared to a comparable mid-
sized gasoline vehicle, the Prius comes out ahead in the life cycle
assessment (LCA) for airborne emissions for CO2, NOx, SOx, HC, but
actually does worse for PM (thanks to the material and vehicle
production stages).  Lifespan is given as 10 years use/100,000km.  The
CO2 break-even point for the 2004 Prius compared to this unnamed
gasoline vehicle is given at 20,000km. (more CO2 is emitted during
Prius production, but the Prius makes up for it over it's driven
lifetime.)


Posted by Jeff DeWitt on July 27, 2007, 1:37 am
 

mrv@kluge.net wrote:

Only 100,000km?  That can't be right, that's only about 62,000 miles.
If your lucky a Yugo would go that far!  (OK maybe not a Yugo but a
Pinto would!).

Jeff DeWitt

Posted by Bob & Holly Wilson on July 26, 2007, 1:18 pm
 



I snagged a spare Prius battery on Ebay for $50:
160140387382

My current battery is quite healthy. I'll refurbish the second battery,
add one modification and then I'll swap it with my perfectly good
battery. This will leave me with one impressive, second battery pack.

I'll refurbish my perfectly good battery (i.e., check the cells and
normalize the charge) and will use it for backup house power. This will
allow us to float through any power outages and keep the second battery
in a good state of charge.


It looks like they go for about the same price as a gas-only, automatic
transmission. I test my transaxle oil and so far, they have come back
with normal wear patterns. Since they have a fraction of the number of
parts of a traditional, automatic transmission, I expect it to last a
very, very long time.

Bob Wilson

Posted by Michael Pardee on August 7, 2007, 6:02 pm
 


I disagree with that. I see hybridization as a central enabling technology
for passenger cars for at least half a century. The primary power source may
not always be a combustion engine; hybridization works well with fuel cells,
as Toyota is finding. The essence of hybridization is to provide an
optimized load for the power generation regardless of what the nut behind
the wheel is doing with his right foot, and in so doing it makes
acceleration performance increasingly independent of the size of the power
source.

Even in the present generation (no pun) hybrids are disconnecting
accessories from the engine. I see that as a crucial step toward any future
cars.

BTW - turboprops are still a modern powerplant and eminently practical for
shorter hops where turbofans are just too inefficient or where runways are
too short. The wife and I just returned from Alaska and made the Vancouver
to Seattle leg on a Bombardier turboprop. When flying higher and faster
turbofans come into their own.

Mike




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