A new Federal-Mogul aluminium piston for a triple turbo diesel engine with 93 kW/l power illustrates that aluminium continues to offer potential for extreme engine applications. At the same time, passenger car engines with ignition pressures greater than 220 bar and more than 100 kW/l of specific output will necessitate steel pistons. Steel designs for such extreme applications require special attention to thermal management, though. In this article, Federal-Mogul shows different engineering aspects of aluminium and steel pistons.
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