Quote:
Originally Posted by Simonas
Just something that came across both of my brain cells 
Why not design an engine to act as an air pump when decelerating, and store the compressed air so that is could be used much like a turbo on acceleration? |
Gas turbine - Wikipedia, the free encyclopedia
Read down to the section on compressed air energy storage.
Compressed air energy storage - Wikipedia, the free encyclopedia
Bottom line is your thinking is valid, since an engine is a pump and with modern variable valve lift and timing you could use the engine as an air pump when deceleration is required.
Friction brakes will soon be history.
Sorry Midas.
regards
Mech