| 摘要 |
PURPOSE:To reduce incurring of a pumping loss and to improve fuel consumption, by a method wherein air is fed from the actuating chamber under a compression stroke of the one of adjoining cylinders to the actuating chamber under a suction stroke of the other, and other cylinder is brought into a rest. CONSTITUTION:A rotary piston engine 1 is provided in a casing 2 with a plurality of cylinders C1-C3. In this case, a communicating passage 31, through which the one under a compression stroke of actuating chambers 11 and 12 of the first and second cylinders C1 and C2 is communicated to the other under a suction stroke of the actuating chambers 12 and 11 according to rotation of rotors 10A and 10B, is formed in a first intermediate housing 5 between the first and second cylinders C1 and C2 and further near the suction ports 15 and 16 than a long shaft. A control valve 33, actuated in linkage with control of an accel, is situated in the communicating passage 31. A reduced number of cylinder running device is provided for closing a shutter valve 32 located in an intake air passage 17a for low speed running of the third cylinder C3 during given low load running and bringing the third cylinder C3 into a rest.
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