November 18, 2005 The turbocharger , which has dominated the
development of the internal combustion engine for the last 30
years, turned 100 years old this week. On 16 November 1905 Swiss
engineer Dr. Alfred Buchi received patent No. 204630 from the
Imperial Patent Office of the German Reich for a machine
consisting of a compressor (turbine compressor), a piston
engine, and a turbine in sequential arrangement. Porsche chose
the occassion to introduce its very latest take on the
turbocharger, this time with variable turbine geometry (VTG).
This extensive article covers the development and major
achievements of the turbocharger and the new VTG technology
which realises even more efficiency, resulting in a significant
improvement of engine flexibility and acceleration particularly
at low engine speeds. In introducing the new 911 model some 31
years after it gave us the first series production sports car
with an exhaust gas turbocharger (the 1974 Porsche 911 Turbo),
Porsche will be presenting the world's first tu