THERMISCHE UND REIBUNGS-PROBLEME DES KALTSTARTES VON VERBRENNUNGSMOTOREN

Abstract

Operation at low temperatures sets special demands on the engine (preheating, heat reten- tion, starting device, etc.) with the aim to decrease the starting time when cold starting. For that purpose preheating is necessary at component part temperatures below -20 to -30 °C. The analysis of rotational losses when cold starting a motor shows that the part of the friction coming from the bearings increases against that of the piston when engine starting temperature is low.