Air/gas engine hybrid idea

[Occasionally6]

Another couple of thoughts:

If you allow high pressure air into a cylinder that hasn't quite gone past TDC it will spin backwards (for air driven start after stop).

Although the air store may start out at 450 psi (or whatever), the pressure will drop as air is removed from the store i.e. you have to work using pressure somewhat lower than the peak storage pressure. It also means that you cannot extract all the energy from the stored air because you have to set a minimum, working, pressure.

[cRiPpLe_rOoStEr]

Originally Posted by Xist

People often said that if crazy ideas work, then every car manufacturer would be using them.

Some ideas might initially sound crazy, but are actually quite smart. The problem is all about marketing.

[Occasionally6]

While on ideas. The Stihl 4-Mix is worth a look. It's a crankcase supercharged 4-stroke, not vastly dissimilar to the Scuderi engine, just using the non-combustion side of a single piston rather than two separate pistons.