Piston stroke
The piston stroke is the maximum distance that a piston can cover in its cylinder in one direction.
In reciprocating piston engines , the piston stroke is the distance of the up and down movement from bottom to top dead center . It is determined by the crankshaft radius of the crankshaft under the influence of a possible twist (if the axis of the crankshaft and the cylinder axis do not intersect, which is particularly the case with compactly built VR engines and double-piston engines with a common crankshaft).
In the German standard DIN 1940 "Internal Combustion Engines", the piston stroke has been defined as the distance between the two dead centers since July 1946 and should be specified in mm; the formula symbol is recommended for him .
The displacement of a cylinder results from the piston stroke times the cross-sectional area of the cylinder bore (times the number of cylinders for the engine as a whole).