What is the primary function of the piston skirt?

The primary function of the piston skirt is to support and stabilize the piston within the cylinder bore. This area of the piston is designed to provide a guiding surface that helps keep the piston aligned as it moves up and down within the cylinder. The skirt's dimensions and shape are critical in ensuring that the piston operates smoothly and efficiently, minimizing any lateral or unwanted movement.

The skirt also plays a role in facilitating proper clearance between the piston and the cylinder wall, which is essential for maintaining appropriate oil control and reducing wear. By keeping the piston correctly positioned, the skirt helps maintain the effectiveness of the piston rings and overall engine performance. Understanding this function is key for technicians working on engine design and maintenance, as improper skirt design or wear can lead to significant engine issues.