HEIHE- High Efficiency Integrated Heat Engine
The present invention is a High Efficiency Integrated Heat Engine, or HEIHE for short. HEIHE comprises twin compound cylinder structure, with the first cylinder being the primary combustion and/or expansion cylinder; the second cylinder being the secondary combustion and/or expansion cylinder. Power strokes driven by expansions of different working fluids such as air-fuel combustion products and steam, as well as compressed air during air hybrid braking power regeneration mode, are integrated into one engine block. Twin cylinder structure provides the secondary compound expansions of three (3) different fluids as to harness the energies that would be lost with the exhaust fluids or during braking. All of these make HEIHE work around six (6) cycles with twelve (12) operation strokes. Among six (6) working cycles involved, four (4) cycles contain four (4) different power strokes but only one of the power strokes consumes the fuel. Thus the fuel conversion efficiency could be greatly increased, or even be doubled comparing with the conventional internal combustion engine (ICE).
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