Efficient hybrid engine cooling system and engine cooling method

Abstract

The invention relates to the technical field of engines, in particular to an efficient hybrid engine cooling system and an engine cooling method. The efficient hybrid engine cooling system comprises amain mechanical water pump, a cylinder cover water jacket, a cylinder body water jacket, an EGR cooler, a temperature regulator and a radiator which are sequentially communicated end to end to form water circulation. A second one-way valve and an electronic water pump are sequentially connected between the water inlet end of the cylinder cover water jacket and the water outlet end of the EGR cooler in series, a first one-way valve is arranged on a main water way between an engine oil cooler and the second one-way valve, and the circulation direction of the first one-way valve is consistent with that of the main water way. The circulation direction of the second one-way valve is set to be the direction from the electronic water pump to the second one-way valve. According to the system andthe method, a circulation loop is the shortest after an engine is shut down, the resistance is low, the heat dissipation efficiency of a turbocharger is improved, and the operation reliability of theengine is maintained.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a high-efficiency hybrid engine cooling system and an engine cooling method. Background technique [0002] The cooling system is an important part of the engine. During the operation of the engine, the parts in contact with high-temperature gas or exhaust are strongly heated, and the cooling system is required to dissipate the excessive heat on these parts, otherwise various adverse consequences will occur, such as: deterioration of lubricating oil, damage of normal oil film; The heated parts expand and destroy the normal clearance of the kinematic pair; the thermodynamic performance of the parts decreases or even fails. In addition, it should not be cooled too much, otherwise it will cause poor combustion, increase emissions, and reduce fuel economy; the viscosity of the engine oil will increase, the friction loss of the moving pair will increase, and the engine will work rough...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned prior art, electronic water pumps are used, which can cool the turbocharger after the engine stops, but there are still deficiencies: after the engine stops, the cooling passages of the main water pump and the oil cooler are not cut off, and the electronic water pump is still working. Water is supplied to the thermostat, radiator and oil cooler cooling water passage in the main cooling water passage of the engine, which greatly diverts the coolant flow through the turbocharger, and the oil cooler is far away from the combustion chamber and exhaust pipe, and its cooling The demand is small and there is no need to cool down after shutdown

This results in a large workload for the electronic water pump, and the cooling effect of the turbocharger is not good.

Images