Novel engine intelligent cooling system and control method based on split cooling and reversed cooling

Abstract

The invention discloses a novel engine intelligent cooling system and control method based on engine split cooling and reversed cooling. The cooling system comprises a cylinder cover water sleeve, an engine body water sleeve, an electronic control water pump, electronic thermostats, an electronic control fan, a radiator, an expansion tank, a temperature sensor, a motor and an electronic control unit. In the working process of the system, cooling liquid is pumped into an engine water sleeve through the electronic control water pump, the first electronic thermostat controls the cooling liquid to enter the cylinder cover water sleeve and the engine body water sleeve according to the rotating speed and load signals of an engine, and the cooling liquid flows from top to bottom and passes through a cooling cylinder cover and an engine body to flow out; and the second electronic thermostat distributes the flow of the cooling liquid entering large circulation and small circulation according to the temperature of the cooling liquid of a header pipe, and the cooling liquid is circulated to be pumped into the engine body of the engine to be cooled. By means of the novel engine intelligent cooling system and control method, the flow of the cooling liquid of the cylinder cover and the engine body of the engine can be accurately distributed, uneven cooling is reduced, and the heating time of the engine is shortened; and meanwhile, the heat state of heated components is optimized through reversed cooling.

Description

technical field [0001] The invention relates to the field of engine intelligent cooling, in particular to a novel intelligent engine cooling system and control method based on split cooling and reverse cooling. Background technique [0002] As the power density of diesel engines and the explosion pressure in the cylinder continue to increase, the thermal load of heated parts including cylinder heads and cylinder liners continues to increase, and the number of thermal failure cases is gradually increasing. At the same time, the direction of energy saving and emission reduction of diesel engines is The general trend. Therefore, the continuous development of diesel engines puts forward stricter requirements on its reliability, fuel economy and emission performance. Therefore, the cooling system should provide sufficient cooling strength for the high heat load area to ensure its thermal reliability, and at the same time reduce the heat load area. Cooling flow in low zones avoid...

AI Technical Summary

Problems solved by technology

[0003] In the traditional cooling system, an integrated water jacket is adopted for the cooling of the cylinder head and the cylinder liner. The heat load is higher than that of the cylinder liner. This cooling method cannot independently adjust the cooling intensity of the cylinder head and cylinder liner, so it will cause insufficient cooling of the cylinder head or excessive cooling of the cylinder liner.

At the same time, the coolant first cools the cylinder liner and then cools the cylinder head, which will inevitably cause the temperature of the cylinder head water jacket coolant to be higher than that of the cylinder liner water jacket coolant, which is not conducive to the reasonable control of the cooling intensity of the cylinder head and cylinder liner.

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