F1发动机

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A time traveler from 50 years ago would find today's Formula 1 cars radically
different， but would be equally surprised at the relative lack of change in engine
technology. Turbochargers have come and gone and there hasn't been a switch to
two- stroke or rotary， scotch yoke engines - let alone to gas turbines or something not even
invented in 1950. The good old four- stroke internal combustion engine powered the very
first Grand Prix car in 1906 and lives on in a form instantly recognizable by any
time- traveling engineers from 1950.
What would impress them is the performance of the current breed of 3.0- liter
naturally
aspirated engine， that pumps out in excess of 260hp per liter， when in 1950， 80hp per liter
was a competitive figure. With careful attention to breathing and the development of
highly potent fuel - including the generous use of n itromethane- the 2.5- liter Vanwall of
1957 attained 120hp per liter as a "flash" dyno reading. Its more representative 115hp per
liter race output- on a marginally less eye- watering (but still drag racing style) mix- was
still then an all - time high for a natu rally aspirated Formula 1 engine.
The following season exotic fuel was outlawed and， at a stroke， power outputs fell
below 110hp per liter. However， Fl being Fl， they were soon creeping up again. Ten years
on， development was such that， running on "pump" gasoline， 1967's Cosworth DFV
produced 133hp per liter. Astonishingly， the current Cosworth 3.0 - liter， Formula 1 engine，
fed comparable fuel and likewise naturally aspirated， produces about twice that!