Patent ID: 7942117
Filing Date: 2011-05-17
Classification: F02B

Abstract:
1. An engine comprising: an air compression module comprising at least two compressors, each having a compressor inlet and a compressor outlet, wherein at least one of the compressors comprises a first piston-cylinder device having a compressor inlet valve at the inlet and compressor outlet valve at the output; first means for conducting compressed air from the compressor outlet of the first compressor to the inlet of the second compressor; and second means for conducting compressed air from the outlet of the second compressor; an expander module comprising and wherein the second piston cylinder device further comprises an expander outlet valve near the head for controlling the expulsion of heated exhaust gas, and wherein said outlet valve is open when the piston is at the bottom dead center position and is closed at a selected point as the piston moves toward the top dead center position allowing exhaust gas remaining in the cylinder to be recompressed; and wherein the engine further comprises means for conducting the exhaust gas from the expander outlet valve.