In which application is a positive-displacement pump primarily used?

A positive-displacement pump is primarily used for delivering oil under pressure to engine components. This type of pump operates by trapping a fixed amount of fluid and forcing that volume into the discharge pipe. Its ability to generate a high pressure makes it particularly suited for applications where precise fluid delivery is critical, such as in lubrication systems for engines.

In engine components, the timely and consistent supply of oil is essential for maintaining proper lubrication, reducing friction, and preventing wear. Thus, the characteristics of a positive-displacement pump ensure that engine components receive a steady flow of oil, even under varying load conditions.

Other applications such as cooling systems, fuel transfer, or air circulation more commonly utilize centrifugal pumps or specific designs that cater to those processes, as they typically require lower pressures and different flow dynamics compared to those needed in oil delivery systems. Therefore, the specific use of a positive-displacement pump in delivering oil is a vital function in mechanical systems where reliability and pressure are paramount.