> What do you mean an actual turbocharger? A turbo runs by the exhaust passing
> through a small turbine which is conected to a larger turbine which pumps
> air into to the intake side of the engine thus increasing the amount of air in
> the cylinders. A supercharger (or roots blower which is a type of
> supercharger) has the same effect as a turbo but is mechanically driven by
> belts as on cars or on larger diesles gear driven like GMs. Most larger
> diesels are either turbo or supercharged due to the amount of air reqired in
> the cylinders to enable combustion to occur, more air = more efficient (up to
> a point).
Sorry, what?
EMD diesels use the supercharger to scavenge the cylinders after a power
stroke - being two stroke engines, they don't have an exhaust stroke to
do that. I far as I'm aware, the supercharger on these engines doesn't
significantly compress the intake charge air - they're simply roots
scavenged, naturally aspirated engines. I'm really not sure about your
last point, either. Diesels being compression ignition, the compression
and stochiometric qualities of the intake charge are, AFAIA, what's
important for effective combustion. [1]
What I meant was this: Does 2301 now have a (more powerful)
turbocharged, forced induction engine? What modifications did it receive
to warrant a new class number?
> David Malcolm
[1] I make no claim of mechanical engineering prowess - if I'm talking
turds, feel free to shower me with shit and derision.
-- Rob Kearey Network Services Prentice Centre University of Queensland 3365 8527 r.kearey@prentice.uq.edu.au