METHOD FOR OPERATION OF THE LIQUID COOLING SYSTEM OF THE INTERNAL COMBUSTION ENGINE Russian patent published in 2021 - IPC F01P3/02 F01P7/16 

FIELD: engine technology.

SUBSTANCE: invention can be used in liquid cooling systems designed for pre-start preparation of internal combustion engines for start-up. The method for operation of the liquid cooling system of internal combustion engines consists in the fact that the coolant is circulated through the cavities of the cylinder head (3), cylinder block (16) and cooling radiator (8) using a liquid pump (9) and pipelines. The coolant flows are controlled using thermostats (2), (17). The coolant is heated during pre-start preparation using a pre-start heater (1) and the coolant temperature is measured using a temperature sensor (6) installed in the cylinder head (3). During the pre-start thermal preparation of the engine, the drive of the main liquid pump (9) is switched off using an electromagnetic coupling (10). Coolant circulation is carried out only in the cavity of the cylinder head (3) using an autonomous liquid pump with an electric drive. When the maximum permissible temperature in the head (3) of the unit is reached, the preheater (1) is turned off and the engine is started. If, during engine operation, the liquid temperature in the head (3) of the block reaches a preset maximum value, the drive of the autonomous liquid pump is simultaneously switched off and the drive of the main liquid pump (9) is switched on, which simultaneously circulates the liquid through the cavities of the head (3) of the block and the block (16) of the cylinders. With a further increase in the temperature of the liquid, the coolant is circulated through the cooling radiator (8) and, if necessary, the cooling fan (26) is turned on. When the temperature of the liquid in the head (3) of the unit decreases below the set minimum value, the cooling fan (26) is first turned off. If the temperature of the liquid continues to decrease, then the cooling radiator (8) is turned off. With a further decrease in the temperature of the liquid, the drive of the main liquid pump (9) is simultaneously switched off and the drive of the autonomous liquid pump is switched on.

EFFECT: reduction of energy costs and time for pre-start thermal preparation as well as hazardous emissions into the atmosphere.

1 cl, 1 dwg