High-Performance Cast Aluminum Pistons for Highly Efficient Diesel Engines

Document Number: 2007-01-1438

Date Published: April 2007

Author(s):
Frank TH Doernenburg
Simon Reichstein - Federal Mogul Nurnberg GmbH
Rainer Weiss - Federal-Mogul Corp.
Scott David Peter Kenningley - Federal-Mogul Corp.
K. Lades - Federal-Mogul Corp.

Abstract:
This paper introduces a new hypereutectic aluminum alloy for piston casting, an improved casting process and a new re-melting procedure. The resulting microstructures improve the fatigue performance of the piston combustion bowl region exposed to severe cyclic thermal and mechanical loading in modern diesel engine applications. It is shown how composition and material properties of the new alloy increase the material¿s fundamental properties, compared to an existing hypereutectic alloy. The new casting process minimizes the occurrence of fine oxide inclusions which helps to exploit the fundamental material strength. Finally the paper describes the combustion bowl re-melting process and gives engine validation results to illustrate its considerable influence on premature fatigue failure.

File Size: 858K
Product Status: In Stock

Included in: SP-2073

See other papers presented at SAE World Congress & Exhibition, April 2007, Detroit, MI, USA, Session: CI and SI Power Cylinder Systems (Part 3 of 4) Power Cylinder Durability and Reliability

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