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CHARACTERISTICS OF AN ARTICULATED RHOMBIC PRISM PISTON:
   MORE LEVELLED OUTPUT TORQUE 

vittorio.scialla@strumentiperleaziende.com
2. An articulated rhombic piston outputs torque for 108° out of 360°, that is 30% of a revolution.
In a four-piston engine, power strokes will overlap by 20%, and the torque output will be more levelled, similar to that of a 5 cylinders engine.

Output torque of a single piston

Output torque of a four-piston engine
                       • = Cylindrical piston         • = Articulated rhombic prism piston

ADVANTAGES

Improved
performance
Improved
efficiency 
Cost
reduction
Lower
vibration/
noise
Longer
durability
Higher
reliability
Note
***
More levelled output torque
    ** **     Output torque is more levelled, similar to that of a 5 cylinders engine, however no balance shaft is needed.
     **       The flywheel may be reduced, or eventually eliminated.