Kinematic model for an hyperstatic crankshaft-connecting rod-piston system; 1 : body, 2 : crankshaft, 3 : connecting rod, 4 : piston
<a href="//commons.wikimedia.org/wiki/User:Cdang" title="User:Cdang">Cdang</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>