térfogatcsúsztatású

Térfogatcsúsztatású is a Hungarian term that translates to "volumetric displacement" or "positive displacement" in English. It refers to a type of pump or engine mechanism where a fixed volume of fluid is moved with each cycle of operation. This is in contrast to dynamic pumps, which impart velocity to the fluid to create flow.

In volumetric displacement devices, the working chamber's volume expands to draw in fluid, and then contracts to expel it. This ensures a consistent volume of fluid is transferred, regardless of the back pressure. Common examples include gear pumps, piston pumps, screw pumps, and vane pumps. These mechanisms are often used in applications requiring precise flow control, high pressures, or the handling of viscous fluids where consistent delivery is critical. The principle is fundamental to many hydraulic systems, as well as in internal combustion engines where pistons displace a fixed volume of air-fuel mixture. The efficiency of volumetric displacement devices can be affected by internal leakage, often referred to as slip.