> ROTARY PISTON ENGINE

> To provide a rotary piston engine capable of enhancing intake efficiency.

> SOLUTION: In a rotary piston engine, there are provided a rotor housing 5 encircling an outer periphery of a rotor 3, and a side housing 6 provided at a lateral side of the rotor 3 for partitioning a rotor housing chamber 2 together with the rotor housing 5. An intake port 11 is formed in the side housing 6, and a side exhaust port 13 formed in the side housing 6 and a peri-cyclic exhaust port 14 formed in the rotor housing 5 are provided as exhaust ports 13, 14. The side exhaust port 13 is provided at a position where a period for the intake port 11 opening in an operation chamber A in an intake stroke and a period for the side exhaust port 13 opening do not overlap with each other, and the peri-cyclic exhaust port 14 is provided at a position where a period for the intake port 11 opening in the operation chamber A in the intake stroke and a period for the peri-cyclic exhaust port 14 opening overlap with ...

> 17 figures