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1 displacement (mL)
of the piston from the upper dead center to the bottom dead space volume by the point is referred to as cylinder displacement; if the engine has several cylinders, the volume of work and the all cylinders called engine displacement. Generally expressed in mL. Engine displacement is one of the most important structural parameters, it is more than the number of cylinder bore and more representative of the size of the engine, it is closely related to the displacement of many indicators of the engine.
Obviously, the same engine displacement, bore and stroke may be different, such as the above example, the travel distance significantly greater than the diameter of the cylinder, the engine also having a diameter greater than the number of strokes, and the final volume of the cylinder may be the same , what different bore and stroke does it mean?
proved relatively short stroke of the engine high speed focus, high-powered, and the long stroke of the engine can output more torque. We can imagine, the larger the stroke, the greater the amount of displacement of the piston, connecting rod of the same amplitude of motion increases, if we regarded as the center of rotation of the crankshaft center, then obviously a long stroke engine circle drawn than the short stroke a larger engine, which means that the radius of the circle to be larger. Before we have said, the distance can be the center point of the center of rotation of the crankshaft to the connecting rod and the axis of the crankshaft seen arm, the arm length longer stroke of the engine, the torque output more natural.
However, the same crankshaft revolution, long-stroke distance of the piston reciprocating engine further than the short-stroke piston engine, and therefore with respect to the short-cycle engines, engine speed Pianman long-stroke slow speed means the power is relatively low. In this context a short-stroke engine has a greater advantage because of its relatively higher speed, the faster the piston displacement, can do more work per unit time.
Displacement (L)
Introduction
Displacement (L) is a manifestation of the fact displacement (mL) rounded.