| 摘要 |
<p>A piston for an internal combustion engine includes a piston crown having an outer cylindrical wall and connected to and above a body portion of the piston. The piston includes at least one piston ring seal groove formed in the outer cylindrical wall and extending peripherally around the piston crown, and a first oil collection groove formed in the outer cylindrical wall below the at least one piston ring seal groove and extending in parallel to the at least one piston ring seal groove around an entire periphery of the piston. The first oil collection groove has a first width measured along a centerline of the piston. A second oil collection groove is formed in the outer cylindrical wall, below the first oil collection groove, extends parallel to the first oil collection groove around the entire periphery of the piston, and has a width that is at least double the width of the first oil collection groove.</p> |
