Cylinder liner comprising a supereutectic aluminum/silicon alloy for sealing into a crankcase of a reciprocating piston engine

US6309480A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Franz Ruckert · Esslingen am Neckar, DE
• Peter Stocker · Murrhardt, DE
• Roland Biedermann · Stuttgart, DE
• Roland Rieger · Waiblingen, DE

Key dates

• Filing date: Jun 9, 2000
• Grant date: Oct 30, 2001
• Expiry date: Jun 9, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12736
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A cylinder liner cast into a reciprocating piston engine made of a supereutectic aluminum/silicon alloy which is free of mixed-in particles of hard material and which is composed in such a way that fine silicon primary crystals and intermetallic particles automatically form from the melt as hard particles. A blank is allowed to grow from finely sprayed melt droplets by spray compaction, with a fine distribution of hard particles being produced by setting the spray for small melt droplets. The fine-grained, hard particles formed from the melt and also the mechanical exposure of the hard particles on the surface of the cylinder results not only in high wear resistance and high contact area of the surface, but also in gentle treatment of the piston and its rings.