Internal combustion rotary engine

A rotary engine comprising:

• a stator housing having a perimeter casing and first and second annular sidewalls joined thereto;
• a cylindrical rotor disposed in said housing between said first and second sidewalls and having a coaxial drive shaft fixedly joined to a center of said rotor and rotatably mounted to said first and second sidewalls, said rotor having four slots extending radially inwardly from a perimeter thereof and equiangularly spaced from each other;
• four planar vanes slidably mounted in respective ones of said rotor slots;
• said perimeter casing being oblong and having first and second diametrically arcuate portions and first and second diametrically opposite flat portions disposed therebetween, with said arcuate portions being spaced radially further from said rotor perimeter than said flat portions to define generally crescent shaped, diametrically opposite first and second working chambers in which said rotor vanes travel;
• an inlet port disposed through said casing adjacent to an upstream end of said first chamber and said casing second flat portion for receiving a compressible fluid for being compressed in said first chamber as said rotor rotates in said casing;
• an exhaust port disposed through said casing adjacent to a downstream end of said second chamber and said casing second flat portion for discharging combustion gases therefrom;
• a flow chamber fixedly joined to said casing at said first flat portion thereof, and having in turn an inlet passage disposed in flow communication with a downstream end of said first chamber for receiving said compressed fluid therefrom, a central storage passage for temporarily storing said compressed fluid, and an outlet passage disposed in flow communication with an upstream end of said second chamber for discharging thereto said compressed fluid stored in said storage passage, said flow chamber further including means for allowing one-way flow through said flow chamber from said first chamber to said second chamber;
• said inlet passage, storage passage, and outlet passage being configured in a crossing loop for changing flow direction of said compressed fluid from a forward direction in a direction of travel of said vanes to a rearward direction relative to said vane travel direction;
• and
• a spark plug disposed in said casing adjacent to said upstream end of said second chamber and downstream from said flow chamber, and being predeterminedly angularly spaced from said flow chamber outlet passage for defining a combustion zone at said upstream end of said second chamber.