Re: OT: Diesel hybrids


"The Benevolent dbu" <relaxand@xxxxxxxxxxxxxxx> wrote in message
news:relaxand-1112BC.03165209022006@xxxxxxxxxxxxxxxxxxxxxxxxxxxx

<snipped>

The challenge to producing a ddiesel hybrid 18 wheeler (tractor-trailer)
is
weight. The amount of cargo tractor trailers can carry is often limited
by
gross vehicle weight. In other words, the trucks are capable of carrying
more weight than is legal on many roads. The batteries needed to
acceptably
power a tractor trailer would probably reduce the vehicle's payload too
much
to carry anything but really light loads like feathers or bread.

BTW, I believe that the term "18 wheeler" is going to become one of those
anachronistic terms like "dialing" a phone number or "ring" tone. Single
wide tires are gradually replacing dual tires for improved fuel
efficiency
at lower cost so an 18 wheeler will become a 10 wheeler.

Batteries=weight, but perhaps in future batteries the weight will come
down, however I see your point. Why not then have a 18 wheeler
(tractor-trailer) set up like the locomotives on rail, diesel-motor
generator or won 't that work? I don't believe they use batteries or do .
they? One thing for sure the hybrid vehicles electrical/electronic
systems are a complicated one to say the least, with 600 volt motors
ect. I wonder about the long term reliability in harsh climates.
--

I'm sure future batteries will be lighter than those available today so
perhaps big truck hybrid technology will become economically feasible.

I don't know if current diesel-electric locomotives use batteries or not. I
saw an article about a hybrid diesel-electric locomotive with batteries so
I'm guessing that the current technology does not have a means to store
significant amounts of electricity. The big advantage of electric motors,
besides being clean, is that they produce significant torque, which help
when starting from a dead stop. A diesel hybrid would probably be better
suited to a truck that does a lot of stop-and-go than to one that is used
primarily for over the road use.
--

Ray O
(correct punctuation to reply)


.

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