OPERATION
In much the same way as the four-cycle CE, the induced air/fuel mixture is subjected to combustion and expansion within the engine, and is converted to power.
As shown in the figure, however, for the CE this conversion is accomplished by the vertical movement of the pistons and the opening and, closing of the valves to accomplish the four strokes of intake, compression, expansion and exhaust. Whereas, for the RE, the rotation
of the rotor opens and closes the intake and exhaust ports to complete the same four strokes. Because, for the RE, the four strokes are repeated by each of the three working chambers, there are actually three outputs (expansion strokes) during one rotation of the rotor. The eccentric shaft rotates three times for one rotation of the rotor.
T.D.C.
B.D.C.
T.D.C.
B.D.C.
T.D.C.
|
Intake |
Compression |
Expansion |
Exhaust |
|
Air/fuel mixture increases as |
Displacement becomes gradually |
Ignition occurs near top dead |
Discharge of exhaust gas occurs in |
|
displacement is increased. |
smaller, and compression pressure |
center of the compression stroke, |
the vicinity of bottom dead center. |
|
becomes greater. |
combustion begins, and expansion occurs. |
Fig. 3-1 Operation principle
