The temperature state of the engine warmed up in freezing conditions in cold climates

A significant part of the territory of Russia is located in the cold climate zone. Negative ambient temperatures are inextricably linked to the temperature of the engine. The temperature range of the engines operated in the conditions of low temperatures of the cold climate is wider relative to the conditions of the middle band. The temperature drop of the engine is accompanied by significant stresses in the structural materials, especially in warm-up conditions. The most common low-temperature mode of operation takes place during heating after a long parking of vehicle without engine start. The temperature condition of the engine largely determines a number of factors within its working process. The completeness of fuel combustion, the consumption of crankcase gases, the viscosity of the operating materials, the conditions of thorns on the surfaces of the parts friction, the presence of condensation processes in the crankcase largely determine the reliability of operation. The activity of temperature changes in warm-up conditions is also considered. This paper describes an experiment consisting in the observation of the change in temperature of the liquids of the two systems. In the experiment, the coolant temperature of the cooling system and the oil temperature of the lubricating system as a criterion for determining the temperature state were chosen.

crankcase gas consumption, temperature state, thermally degraded and partially oxi-dized fuel fractions, crankcase gas dew point temperature