pistão

Pistão is a term originating from Portuguese that refers to a piston, a component found in reciprocating engines and pumps. A piston is a sliding piece within a cylinder that moves back and forth. Its primary function is to transfer force from expanding gas in an engine cylinder to the crankshaft via a connecting rod, or in a pump, to move fluid.

In internal combustion engines, the piston is crucial for the four-stroke cycle. It compresses the fuel-air mixture, is pushed down by the explosion of the mixture, and then expels the exhaust gases. The shape and material of the piston are designed to withstand high temperatures and pressures while maintaining a tight seal within the cylinder. This seal is typically achieved with piston rings.

Pistons are also used in various types of pumps, such as reciprocating pumps. In these applications, the piston's movement draws fluid into the cylinder and then forces it out. The size and design of pistons vary greatly depending on their intended use, ranging from small pistons in hydraulic systems to large pistons in industrial engines. The smooth movement and sealing capability of the piston are essential for the efficient operation of these mechanical devices.