Independent double-circulation cooling system of engine

Abstract

The invention provides an independent double-circulation cooling system of an engine. The double-circulation cooling system comprises a high temperature water circulation cooling system and low temperature water circulation cooling system. The high temperature system controls a switch through the selection of a thermostat and a solenoid valve, so that flow of cooling water is switched according toengine load to achieve rapid warm-up and reduce fuel consumption. In an engine cold start stage, a cylinder cover and a water jacket of cylinder body are connected in series, the cooling water is heated twice in one cycle, the temperature rise of the cooling water is increased to the maximum extent; and in warm-up and high-temperature stages where the engine temperature is high, the water jacketof the cylinder cover and the water jacket of the cylinder body are connected in a parallel, the water flow rate of the engine is increased to the maximum degree, the water flow rates of the cylinderbody and the cylinder cover can be controlled, the cylinder body and the cylinder cover can be controlled to reach optimal temperature, so that knock is reduced, and the oil consumption is reduced. The low-temperature water circulation system adopts an electronic water pump and a separate water storage pot, and is independent from the high-temperature water circulation, so that the cooling effectof the low-temperature system is ensured, the air inlet temperature and the air inlet efficiency of the engine are guaranteed effectively, the power performance of the engine is facilitated, and the knock is prevented.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, in particular to a high and low temperature cooling system independent of each other. Background technique [0002] Engine warm-up refers to the process in which the temperature of the engine body rises from low temperature to normal operating temperature. When the engine is cold started, due to the low temperature of the intake system and the cylinder, it is difficult for gasoline to evaporate completely, resulting in incomplete combustion and a large amount of C and H emissions; at the same time, due to the difficulty of fuel evaporation and poor combustion conditions, additional fuel consumption is increased . In addition, during the warm-up process, the temperature of the cooling water is low, and the heat taken away by the water from the engine increases, which increases the heat loss. When the engine starts cold, the temperature is low, the internal moving parts of the engine h...

AI Technical Summary

Problems solved by technology

[0003] For the traditional supercharged engine, it uses an air-cooled system, because the pipeline is too long, there is a delay, and it will be affected by the speed of the vehicle, so it cannot maintain the best cooling effect under any working conditions

More

Images