Abstract: An internal combustion engine has a plurality of cylinders arranged in rows in an engine block, with reciprocable pistons in the cylinders. A cylindrical valve housing chamber is defined in the block over each row of cylinders and communicates with the cylinders through an inlet-exhaust passage in each cylinder. A rotary valve is rotatably mounted in the valve housing chamber and has a plurality of circumferentially spaced intake and exhaust passages with apertures defined in the valve surface which are selectively alignable over the inlet-exhaust passages of the respective cylinders. To further insure a complete burning of the air-fuel mixture, a bomb valve chamber is provided adjacent each cylinder haing a gas passage near the top of the pistons. The gas passage communicates the cylinder with the bomb valve chamber. A rotatable globe-draped bomb valve is selectively opened and closed to entrap a portion of the combustion products which are rich in unburned air-fuel mixture.

Abstract: A rotary internal combustion engine which includes a plurality of cylinders equiangularly mounted around a central rotary valve assembly on an axial horizontal shaft, in which more complete combustion and less emission of unburnt gases is achieved. The engine embodies a valving rotor comprising horizontally spaced discs having two properly located intake and exhaust valve passages and related generally cup-shaped intake/exhaust guide means eccentrically mounted on the shaft. This arrangement together with correspondingly horizontally spaced intake/exhaust ports in the respective cylinders, provides for dual intake charges and for the exhaust gas to be discharged twice and more completely in a single exhaust stroke via the properly located exhaust valves. The exhaust valves, which are also in the horizontally spaced rotor discs, are circumferentially displaced from the respective intake valves and also from each other.