Pistons for Passenger Car Diesel Engines – Aluminum or Steel?

Authors

Dr.-Ing. S. Spangenberg, Dr.-Ing. T. Hettich,
Dipl.-Ing. M. Lazzara, Dipl.-Ing. K. Schreer, MAHLE GmbH, Stuttgart

Year

2014

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 777

Summary

As a result of future CO₂ emissions targets, the power density and the mean effective pressure, i.e., the thermal and mechanical load on the pistons, can also be expected to increase further for diesel engines. The high thermal conductivity of the material means that aluminum pistons are well able to meet the performance requirements. However, measures for optimizing the cooling and strengthening of the critically stressed rim of the combustion bowl are necessary. Initial results with locally fiber-reinforced pistons indicate that peak cylinder pressures above 200 bar will be possible.

Order Members Login