What is the function of moveable counterweights on an engine crankshaft?

The function of moveable counterweights on an engine crankshaft primarily focuses on the reduction of torsional vibrations. As the engine operates, different components, such as pistons and connecting rods, create varying forces and moments that can lead to vibrations. Torsional vibrations can cause stress and wear on engine components, affecting the performance and longevity of the engine.

By utilizing moveable counterweights, the crankshaft can be dynamically balanced to counteract these vibrations. As the engine speed changes, the position of the counterweights can adjust, providing a balancing force that helps smooth out the power delivery and minimizes vibrations throughout the engine. This balance is crucial for maintaining engine stability and performance, especially in high-speed or high-load conditions. Thus, the implementation of moveable counterweights is essential for enhancing the overall operational efficiency and reliability of the engine system.