Combustion engine with dual function motor element and rotary valve for cyclical fuel and exhaust metering

Claim 1

In a combustion powered engine, an apparatus for effecting combustion of fuel gas comprising means for volumetrically compressing a mixture of air and fuel homogeneously mixed without stratification, including an operating member disposed within a casing and movable therein to cause volumetric compression of said mixture and volumetric expansion of combustion gas, means defining a cylindrical volume, means forming an introducing part through which said compressed mixture can be fed from said casing into said cylindrical volume, means defining a mixture chamber where a flow of said mixture can be established along an outer annular layer portion of said cylindrical volume concentric with said cylindrical volume in a direction away from said introducing part, means for receiving said mixture flow and effecting continuous combustion of the mixture by heat radiated from a hot surface and provided at a position within said cylindrical volume and remote from said introducing part, said cylindrical volume defining means including a cylindrical combustion tube provided adjacent of said casing, said mixture chamber defining means including a cylindrical convection tube provided within said cylindrical combustion tube concentrically therewith so as to leave said chamber between the inner peripheral wall surface of said cylindrical combustion tube and the other peripheral wall surface of said cylindrical convection tube, said convection tube having an end open to said mixture chamber, said continuous combustion effecting means including a heat radiation plate provided within said convection tube concentrically therewith so as to divide the inside of the convection tube into a combustion chamber which is in communication with said mixture chamber through said opening end of said convection tube and a combustion gas chamber, said heat radiation plate being heated by combustion gas in said combustion chamber, whereby the resultant heat accumulated therein radiates into said combustion chamber to ignite fuel and air mixture introduced into said combustion chamber, combustion gas chamber ports provided in said heat radiation plate, said introducing part forming means including an aperture provided in the wall of said combustion tube to allow said mixture chamber to communicate with said casing, and outlet part forming means comprising an aperture provided in the wall of said convection tube to allow said combustion gas chamber to communicate with said casing, and including a rotary valve provided concentrically with said combustion tube to serve to allow compressed mixtue to be introduced into said mixture chamber through said aperture of said combustion tube from said casing only when said operating member in said casing is in an ending portion of its compression stroke and to allow combustion gas to flow into said casing through said aperture of said convection tube from said combustion gas chamber only when said operating member in said casing is in an initial portion of its expansion stroke, whereby a constant pressure can be maintained in said fuel and air mixture chamber.