Cam rotary engine power system of internal combustion type

A power system of cam rotary internal combustion engine, comprising an inner cavity member, an external rotating surface member, a cam, end cover members, cam followers, valves and valve controllers;

• wherein, rise and fall intervals of the cam's contour profile causing size change of the cam surface, an annular clearance with varied dimension being formed by encircling the cam with the inner surface of the inner cavity rotating surface member, the outer surface of the external rotating surface member and the end cover members, in which the coupled surfaces form the contact sealing relationship except the cam contour profile;
• the cam being fixed with one of the inner cavity member or the external rotating surface member and rotated relative to the other;
• a set of cam followers being installed on the inner cavity member or the external rotating surface member which is not fixed with the cam, sealing contact being formed by a higher pair joints between the cam followers and the smooth cam contour profile surface, so as to separate the annular clearance into a plurality of sealing working chambers along the circumferential direction;
• under the control of valve controllers, valves being used to connect the inlet and exhaust ports in each chambers, and to control flow direction of fuel or spent gas in an orderly manner;
• by controlling the timing of the valve switch and the volume change of each working chamber, the intake, compression, expansion and exhaust phases of Otto cycle being completed periodically;
• in the expansion stroke, the chemical energy produced by fuel combustion being acted on the cam contour profile and cam followers in the form of high pressure, so that the mechanical energy being output by the two in the form of relative rotating motion.