Cooling system of power assembly

Abstract

The invention relates to a cooling system of a power assembly. The cooling system comprises an engine, a first cooling water pump, a radiator, a second cooling water pump, a first thermostat, a second thermostat, an engine oil cooler, a gearbox oil cooler, a warm air blower and a connecting pipeline. By means of the cooling system of the power assembly, it is guaranteed that an engine is warmed up rapidly during cold engine starting, the whole vehicle major cycle and the unnecessary minor cycle at the low temperature can be closed through the first thermostat and the second thermostat, and more water flow circulates between an engine cylinder and a cylinder cover through an engine minor cycle pipeline; and heat exchange is reduced, and the engine warming-up speed is increased. When the temperature of the water of the engine is low, the minor cycle of a gearbox oil cooling system is reduced at the low temperature through the second thermostat so that it can be guaranteed that the gearbox oil does not exchange heat with the cooling water of the engine at the low temperature; and the oil temperature of a gearbox is increased more rapidly, and then a better lubrication effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of automobile cooling systems, in particular to a cooling system of a power assembly. Background technique [0002] With the development of powertrain technology, the circuit of the cooling system is becoming more and more complex. With the increase of engine power, the load of the cooling system is also increasing. Some models need to water-cool the engine oil, and many automatic models also need Water cooling of transmission oil cooler and so on. These have caused the water flow demand of the entire cooling system to increase. At the same time, the increase in heat exchangers has led to the emergence of problems such as the speed of the vehicle's cold start and warm-up, and the heating of the heater in winter. [0003] Due to the complexity of the water flow branches in the existing cooling system, the capacity of the water pump is insufficient, and there are problems of slow heating and poor heating effe...

AI Technical Summary

Problems solved by technology

These have caused the water flow demand of the entire cooling system to increase. At the same time, the increase in heat exchangers has led to the problem of the vehicle's cold start and warm-up speed and the heating of the heater in winter.

[0003] Due to the complexity of the water flow branches in the existing cooling system, the capacity of the water pump is insufficient, and there are problems of slow heating and poor heating effect. Similarly, due to the limitation of water flow, there is a problem of insufficient cooling capacity for the oil cooling system

Since heat exchangers such as heaters and gearbox oil coolers have different water flow requirements in different environments, most cooling systems currently do not distribute and adjust the flow of the entire cooling system according to demand, resulting in unnecessary waste

For example, when the gearbox oil is not cooled, there is still water flowing through it, which will reduce the flow of warm air and small circulating water, reduce the warm-up speed and heating effect, etc.

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