Patent ID: 7698892
Filing Date: 2010-04-20
Classification: F01K

Abstract:
1. An external combustion engine comprising: a container sealed with a working liquid in a way adapted to flow therein; a heater for heating and vaporizing the working liquid in the container; and a cooler for cooling and liquefying the vapor of the working liquid heated and vaporized by the heater; wherein the displacement of the working liquid caused by the volume change of the vapor is output by being converted into the mechanical energy, the external combustion engine further comprising: a pressure regulating container sealed with a pressure regulating liquid and communicating with the container; a heating means for heating and vaporizing the pressure regulating liquid; and a restrictor means disposed in the communicating portion between the pressure regulating container and the container; wherein the pressure regulating container and the heating means are adapted to maintain at least a part of the pressure regulating liquid in a boiling state; and wherein the pressure regulating container is adapted to have such a thermal resistance that the temperature (Th) of the high-temperature portion of the pressure regulating container for vaporizing the pressure regulating liquid assumes a value intermediate between the temperature (T