Stroke (engine)

Stroke earlier than only the vertical movement of an object has been designated from the bottom upward. The original word stroke can therefore be derived from lifting.

Stroke to the direction

• If it is the original, vertical stroke from bottom to top, one speaks today of the upstroke.
• The reverse movement to the upward movement is referred to as a downward stroke.

Also, a continuously repeated up and down motion of an object is collectively referred to as the hub, see for example the tidal range. Over time, it has therefore become customary to refer to all movements of an object from point A to point B in a straight line, regardless of their direction and stroke.

Stroke of cylinders, pistons and guides

The stroke of a cylinder is colloquially referred to as cylinder stroke. The capacity of a cylinder ( the cylinder displacement ) results from the multiplication of stroke and piston area.

Stroke in linear technology

• If a linearly movable component is extended, it is called pre-stroke.
• If a linearly movable member is retracted, one speaks accordingly of the return stroke.
• With double stroke, a complete sequence of forward and return stroke is meant.

In the linear technology thus means stroke the path traveled by a linear guide, the stroke of an actuator or a linear drive, this machine elements and assemblies can be installed in practically any position in space, ie the forward and return stroke so that can be done in virtually any direction.

In particular, electro-mechanical actuators are also referred to as electro-mechanical lift cylinders, electromechanical cylinder or just a stroke cylinder.

Hub for engines

In piston engines, the path traveled by the piston between the upper and lower dead point is referred to as stroke or stroke. Since many engines, the cylinders are arranged horizontally instead of vertically and horizontal movements between defined points can be referred to as a stroke for example today.