Cooling system of engine

Abstract

The invention discloses an engine cooling system, comprising a pump (1), a heater unit (2), an oil cooler (3), an EGR cooler (4), a radiator (5), an expansion tank (6), a thermolator (7), a cylinder body water jacket (8), a cylinder head water jacket (9) and an integrated support (10), wherein, the pump (1), the oil cooler (3) and the thermolator (7) are mounted on the integrated support (10), and the thermolator (7) is a high purity wax thermolator which is arranged at a water inlet; cooling fluid entering the cylinder head water jacket (9) flows out through the back end of the cylinder head, two water outlets are arranged at two sides of the back end of the cylinder head, the water outlet at the air inlet side is connected with the radiator (5), the water outlet at the air outlet side is connected with the heater unit (2), a branch circuit of the heater unit is normally open, and the branch circuit of the heater unit is controlled by the thermolator (7). By increasing the initial operating temperature and lowering the temperature difference between the full operating temperature and the initial operating temperature, the engine cooling system of the invention can improve cooling effect, thus improving economical efficiency of engine gas fuel, and lowering discharge of harmful gases; in addition, the structural arrangement is more compact.

Description

technical field

[0001] The invention belongs to the field of passenger cars, in particular to a cooling system for a water-cooled engine of a passenger car. Background technique

[0002] In the existing engine cooling system, the coolant is generally directly pumped into the engine cylinder through a water pump, enters the cylinder head from the upper water port of the cylinder gasket, and then comes out from the cylinder head, and a double valve is installed at the water outlet of the cylinder head Wax-type thermostat, the thermostat controls the opening and closing of large and small cycles according to the temperature of the coolant. The thermostat is generally arranged at the water outlet of the engine. At the same time, because the temperature difference between the full opening temperature and the initial opening temperature is too large, the temperature difference can reach 15°C, and the temperature control of the thermostat is very inaccurate. , It is easy to cause ...

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