Patent ID: 7673595
Filing Date: 2010-03-09
Classification: F01B,F02B

Abstract:
1. In an internal combustion engine having an annular rotor rotatable in a direction about a central axis in a housing and in which cylinders are arranged in a common plane and hold respective main pistons reciprocable along respective piston axes and having respective inner ends pivoted on an eccentric axis, the improvement wherein the cylinders have outer ends pivoted in an outer casing of the rotor, the cylinders open radially outward through the outer casing of the rotor and each form a working chamber with the respective main piston, a combustion chamber formed in the housing has an inner end opening radially inward on an inner housing surface surrounding the outer casing of the rotor, each main piston has a respective smaller secondary piston shiftable along the respective piston axis and exposed in the respective working chamber, and the combustion chamber extends at an angle of 70 to 85 degrees relative to a radius from the central axis.