Engine cooling system and cooling method

Abstract

The invention discloses an engine cooling system and a cooling method. The cooling system comprises a water pump, a double-valve temperature regulator, a machine oil cooler, a water jacket of a cylinder body, a water jacket of a cylinder cover, a water tank radiator and an EGR cooler. The cooling system adopts a water passage circulation as follows: when the engine is started, the water pump begins to work; cooling liquid firstly flows into the machine oil cooler and enters in the water jacket of the cylinder cover to cool the key area of the cylinder cover, and then enters in the water jacket of the cylinder body from a gasket circulating hole of the cylinder cover to cool the cylinder body and the EGR cooler. The cooling liquid in the cooling system firstly cools the cylinder cover to reduce the temperature of the cylinder cover by 10 DEG C to 15 DEG C, enhance aeration efficiency, enlarge air inlet quantity, promote complete combustion, reduce the formation of discharge objects andenhance output efficiency; After cooling the cylinder cover, the cooling liquid enters in the cylinder body for cooling the cylinder body; the higher temperature of the cylinder body can reduce friction, improve fuel efficiency, enhance the output efficiency and reduce peak value pressure and temperature in the cylinder.

Description

technical field [0001] The invention belongs to the field of automobiles and is suitable for a closed forced water-cooled engine cooling system. Background technique [0002] In the existing engine cooling system, the coolant usually enters the cylinder block through the water pump, then enters the thermostat through the cylinder head, circulates through the thermostat, and finally returns to the water pump. For details, see figure 1 ; or the coolant enters the cylinder body and cylinder head water jacket respectively through the water pump, and then circulates through the thermostat, and finally returns to the water pump. For details, see figure 2 . Generally, it is only required that the engine operating temperature should not be overheated or overcooled, but for traditional engine cooling methods, either the temperature of the cylinder head is too high or the temperature of the cylinder block is slightly lower. This not only affects the fuel consumption rate and output...

AI Technical Summary

Problems solved by technology

[0003] Therefore, it is very important to ensure that the engine always works in the optimum temperature range. If the cylinder temperature is too low or the cylinder head temperature is too high, it will not only affect the efficiency of the engine, but also seriously affect the emission pollution of the engine, and at the same time cause energy consumption. waste

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