Severe low-temperature conditions, in which considerable part of Russian Motor\nPark is operated, affect vehicles negatively. Cold weather causes higher fuel consumption and\nCO2 emissions always. It is because of temperature profile changing of automobile motors,\nother systems and materials. For enhancement of car operation efficiency in severe winter\nenvironment the dependency of engine warm-up and cooling time on ambient air temperature\nand wind speed described by multifactorial mathematical models is established. -On the basis\nof experimental research it was proved that the coolant temperature constitutes the engine\nrepresentative temperature and may be used as representative temperature of engine at large.\nThe model of generation of integrated index for vehicle adaptability to winter operating\nconditions by temperature profile of engines was developed. the method for evaluation of\nvehicle adaptability to winter operating conditions by temperature profile of engines allows to\ndecrease higher fuel consumption in cold climate.
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