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- Definition: Articulated pistons are a type of piston construction that features a two-piece design. This design separates the piston into an upper section (crown or dome) and a lower section (skirt), which are linked together by a piston pin.
- Key Features:
- Two-Piece Construction: The piston crown and skirt are distinct components, allowing for different materials and properties to be used for each part. For example, the crown may be made from steel for durability and heat resistance, while the skirt may be made from aluminum for lighter weight and better thermal conductivity.
- Linking Mechanism: The piston crown and skirt are connected by a piston pin, which enables relative movement between the two parts. This design helps manage thermal expansion and contraction, and improves performance and durability.
- Materials: Many modern engines (post-1994) use articulated pistons with a steel crown and an aluminum skirt, combining the benefits of both materials.
- Benefits:
- Enhanced Durability: The separate crown can withstand higher temperatures and stresses, while the aluminum skirt provides lighter weight and better heat dissipation.
- Improved Performance: Reduces friction and wear due to the separate components moving independently.
- Thermal Management: Helps in managing the thermal expansion of different materials, improving engine efficiency and longevity.
Articulated pistons are often used in high-performance and modern engines to optimize both strength and weight, leading to better overall engine efficiency and durability.
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