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Vehicle Design Data Characteristics / July 19, 2021

Piston motion equations

The motion of a non-offset piston connected to a crank through a connecting rod (as would be found in internal combustion engines), can be expressed through several mathematical equations. This article shows how these motion equations are derived, and shows an example graph. Crankshaft geometry   Diagram showing geometric layout of piston pin, crank pin and crank center Definitions

The motion of a non-offset piston connected to a crank through a connecting rod (as would be found in internal combustion engines), can be expressed through several mathematical equations. This article shows how these motion equations are derived, and shows an example graph.

Crankshaft geometry

 

Diagram showing geometric layout of piston pin, crank pin and crank center

Definitions