Hybrid Car ‚Äď More Fun with Less Gas

Has anyone seen a steam engine/electric battery hybrid vehicle? - Page 13

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Posted by user on June 6, 2009, 9:25 pm
 
Richard W. wrote:

The rabbit was not considered a midsized car, the prius is. Even so that
was with the old EPA Standards under which the early Prius was rated at
over 60 MPG in the city and 51 MPG highway

Posted by News on June 20, 2009, 12:36 pm
 



They do not. Diesels are also filthy and noisy and good for tractors.



Posted by Day Brown on June 20, 2009, 1:42 pm
 News wrote:

Argue with Carnot. He says the efficiency of an engine depends on the
ratio of the temp of the air/fuel mix before to after combustion.

Gasoline burns at something like 1400 deg f, Diesel at 1700 deg f, and
being hotter, the engine needs better cooling and more robust exhaust
valves. You can burn diesel in a gas engine but you'll burn valves doing
it. And because diesel burns at a higher temp, the pressure on the
piston is higher, and this tends to blow the rod bearings, connecting
rods, wrist pins, and crankshaft journals.

So the diesel engine hasta be made more robust right from the git go.
The noise is from the compression combustion, but a more robust engine
can suppress that, and the heavier valves that resist burning clatter
louder, but sleeve valves would solve that.

The particulates are dirty looking, but its the stuff in the exhaust of
gas engines that you cant see that is a bigger problem.


Posted by Stormin Mormon on June 20, 2009, 2:40 pm
 Thanks, that answered one of the questions I'd had for a
while. Q: For example, during a hurricane evacuation.
Gasoline is sold out. Suppose you try to run diesel in a
gasoline auto. What goes wrong? I remember that some
gasoline engines will run on kerosene, if the engine is
started on gasoline, and switched over. During a hurricane
evac, you might pull into the fuel station with a warm
engine, have diesel available, and need to drive a couple
hundred miles. Keep the engine running, so you aren't
restarting.  Where, presumably, you could buy gasoline and
then be able to restart.

From what you write, it would do a lot of damage in the
meantime.

--
Christopher A. Young
Learn more about Jesus
  www.lds.org
.



Gasoline burns at something like 1400 deg f, Diesel at 1700
deg f, and
being hotter, the engine needs better cooling and more
robust exhaust
valves. You can burn diesel in a gas engine but you'll burn
valves doing
it. And because diesel burns at a higher temp, the pressure
on the
piston is higher, and this tends to blow the rod bearings,
connecting
rods, wrist pins, and crankshaft journals.

So the diesel engine hasta be made more robust right from
the git go.
The noise is from the compression combustion, but a more
robust engine
can suppress that, and the heavier valves that resist
burning clatter
louder, but sleeve valves would solve that.

The particulates are dirty looking, but its the stuff in the
exhaust of
gas engines that you cant see that is a bigger problem.



Posted by Day Brown on June 21, 2009, 2:21 am
 Stormin Mormon wrote:

I can see getting away with it if you keep the temperature, load, and
rpm low. But yeah, you can seriously fuck up an engine quick.

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