So not one, but TWO patents were filed by Mazda regarding the rotary engine earlier in the year. Both are in Japanese and both include a batch of images that show some pretty interesting changes.

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.

Download the first Patent here: Mazda Updated Rotary Patents - File 1

To provide a rotary piston engine system capable of enhancing intake efficiency, and to provide a vehicle mounted therewith.



SOLUTION: In an engine body 1, there are provided a rotor housing 5 encircling an outer periphery of a rotor, side housings 6 provided on both front and rear sides of the rotor 5, an exhaust port 13 for delivering exhaust gas from a rotor storage chamber 2, and intake ports 11, 12 for introducing intake air into the rotor storage chamber 2. The intake ports 11, 12 are formed in the side housings 6 at a front side so as to open to a lateral face 111 on the front side of the rotor storage chamber 2, and the exhaust port 13 is formed in the side housings 6 on the rear side so as to open to the lateral face 111 at the rear side out of the lateral face 111 in a longitudinal direction of the rotor storage chamber 2. A downstream end of the intake passage 30 extending from the intake ports 11, 12 is arranged at a portion near the upper-part front of the lateral.

Download the second Patent here: Mazda Updated Rotary Patents - File 2

Now, anyone out there with a better understanding of Japanese AND rotary engine workings want to further decipher what Mazda has in store for us?