Circulating piston engine

An engine, comprising:

• a housing defining an annular bore;
• an air intake assembly including an air intake port and an air outlet port provided on the housing;
• a fuel distribution assembly;
• an exhaust gas port;
• a piston assembly disposed within the annular bore, the piston assembly configured to be coupled to a drive mechanism;
• a valve configured to oscillate between a first position within the annular bore to allow the piston assembly to travel within the annular bore from a first location proximate to the valve to a second location distal to the valve and a second position within the annular bore to define a combustion chamber relative to the piston assembly at the second location;
• and
• a cam assembly, comprising:
• a conjugate splined barrel cam defining a spline profile about an outer periphery of the conjugate splined barrel cam, the conjugate splined barrel cam configured to rotate the spline profile about an axis of rotation;
• a rocker arm having a cam follower disposed in proximity to the spline profile of the conjugate splined barrel cam, the rocker arm configured to rotate about a pivot joint in response to rotation of the spline profile of the conjugate splined barrel cam about the axis of rotation;
• and
• a toggling assembly disposed between the rocker arm and the valve, the toggling assembly configured to oscillate the valve between the first position and the second position in response to rotation of the rocker arm about the pivot joint.