Franco-Crosti Boiler for Steam Trains

[NW Mailing List]

".In simple terms I explained the differences to my car customers between
the two that a supercharger forced fresh air through the engine to boost
power where as a turbocharger recirculated partially burnt exhaust gas back
through the engine to be burned a second time"

 

No, no, no, and no. That's 1000% wrong. Both a supercharger and a
turbocharger are air compressors that shove more air (and therefore more
oxygen) into an internal combustion engine. More air = more power. The
difference between the two is how they are driven. A supercharger has a
direct mechanical connection to the engine. That can be a belt, or gears, or
directly to the crankshaft. A turbocharger is powered by the engine's
exhaust gases spinning a turbine which the spins the compressor.  The
exhaust gases are then vented to the air. There may be some applications
where a small portion of exhaust gas is recycled to the engine to lower
pollutants or increase fuel efficiency, but that is external to the
turbocharger and not part of its function.  

 

Rob Doorack

North Andover, MA

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