1988-08-01

Research Needs for Diesel Engines 881178

Combustion of highly non-homogeneous fuel-air mixtures and the use of hydrodynamic lubrication of piston rings are identified as barriers to long-term progress in diesel engines. The characteristics of non-homogeneous mixtures are discussed and the effects of various injection system modifications are illustrated using a turbulent fuel jet model. The problems caused by the hydrodynamic oil film at the piston rings are identified, and the potential of boundary lubrication is discussed.

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