Embedded Composite Piston Structure for High-Temperature Strength
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Solution Overview
Problem
Pistons in high-power engines, particularly 2-stroke engines, face issues with excessive wear and deformation due to high temperatures and combustion pressures, leading to material instability and potential failure.
Innovation Solution
The integration of an insert made from a material other than aluminum, such as hardened steel or stainless steel, within the piston, connected to the aluminum crown and skirt via interconnections, enhances structural support and stability, with features like grooves and channels to secure the insert and improve operational robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a piston is made of aluminum to reduce weight, then the weight decreases, but the strength and stability under high temperatures and combustion pressures deteriorate
Solution Approach 1:
The patent applies composite materials by integrating an insert made of a material other than aluminum (such as steel or iron) into the aluminum piston. This creates a composite structure where the aluminum matrix provides lightweight properties while the embedded insert provides enhanced strength and stability under high temperatures and combustion pressures, effectively resolving the contradiction between weight reduction and strength maintenance.
2Stability of the object's composition
If the piston crown is supported by an insert, then the stability improves, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the piston into distinct functional zones: the aluminum crown/skirt structure and the embedded insert. The insert is positioned specifically at the crown region where strength is most needed, creating a segmented structure that provides targeted support without unnecessarily complicating the entire piston design. This localized approach maintains stability while controlling overall complexity.
Data Source
AI summary
A piston, comprising a crown, an insert having an outer ring, an inner ring, and at least one interconnection between the outer ring and the inner ring, and a skirt integrally formed with the crown through the insert so that the crown and skirt are made from a type of aluminum and the insert is made from a material other than aluminum.