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MAHLE steel pistons for diesel engines
In diesel engines, steel pistons provide significant potential for reducing CO2 emissions in comparison with the aluminum pistons that have been typical up to now. MAHLE has therefore developed steel pistons for passenger car diesel engines to readiness for series production. The fundamental design advantages in comparison with aluminum pistons have already been discussed extensively. On the one hand, the benefits are found mainly in the area of frictional loss. In collaboration with a manufacturer, MAHLE has again demonstrated this frictional loss advantage in test bench analyses under both partial load and full load. Thermodynamic conditions additionally result in advantages in combustion that lead to a reduction in fuel consumption and emission levels. The lower compression height of a steel piston can also be utilized to increase the swept volume or to decrease the height of the engine.
The MONOTHERM piston from MAHLE, which has been tried and tested many times over in commercial vehicle engine applications, combines these advantages. It will be used in a series production passenger car diesel engine for the first time in 2014.