Working gas circulation engine

Abstract

In a working gas circulation engine, water vapor contained in exhaust gas after combustion is separated and removed at higher efficiency as compared with the conventional technology, the influence of remaining water vapor is prevented from reducing the ratio of specific heats of working gas and deteriorating the thermal efficiency of the engine. A working gas circulation engine which comprises a circulation passage part which connects an inlet port communicated to a combustion chamber and an exhaust port communicated to the combustion chamber in the exterior of the combustion chamber, supplies fuel, oxygen, and working gas to the combustion chamber to burn the fuel in the combustion chamber, and supplies the working gas contained in the exhaust gas discharged through the exhaust port from the combustion chamber to the combustion chamber through the circulation passage part and the inlet port. The working gas circulation engine comprises a water vapor condensing means which interposes in said circulation passage part and has an entrance part and an exit part, the water vapor condensing means removes water vapor from gas flowing thereinto through the entrance part from said circulation passage part by condensing water vapor contained in the gas and discharges the gas from the exit part to said circulation passage part, a gas pressure detecting means to detect the pressure of the gas flowing into said water vapor condensing means, and a gas pressure adjusting means to adjust the pressure detected by said gas pressure detecting means.