Double-loop cooling system and method for engine

Abstract

The invention relates to the field of engine cooling systems and aims at providing a double-loop cooling system and method for an engine. The double-loop cooling system for the engine comprises a cylinder block water jacket and a cylinder cover water jacket, and a main water pump; the cylinder cover water jacket comprises an upper cylinder cover water jacket and a lower cylinder cover water jacket, the two of which are connected with the main water pump; the double-loop cooling system for the engine further comprises an engine oil cooler connected in series with the cylinder block water jacket, a radiator connected with the main water pump, a cylinder cover thermostat connected with the upper cylinder cover water jacket and a lower cylinder cover water jacket, a cylinder block thermostat connected with the cylinder block water jacket and the radiator, an expansion tank connected with the main water pump, a first degassing valve connected with the upper cylinder cover water jacket and the expansion tank, a second degassing valve connected with the main water pump and the expansion tank, and a third degassing valve connected with the cylinder cover thermostat and the expansion tank; a water temperature sensor is arranged at an outlet of the lower cylinder cover water jacket. The double-loop cooling system for the engine is good in dynamic property, economical efficiency and discharge property of the engine, and is further capable of prolonging the service life of the engine.

Description

technical field [0001] The invention relates to the field of engine cooling systems, in particular to an engine dual-circuit cooling system and a cooling method. Background technique [0002] The engine cooling system of the car is responsible for providing cooling for the engine and ensuring the normal and reliable operation of the engine. In traditional engines, the cooling system is usually a cooling system with a single cooling circuit. The water pump is usually arranged on the cylinder block, and the cooling water enters from the water inlet of the cylinder block. After cooling the cylinder block, the cooling water flows upward into the cylinder head. After the cylinder head is cooled It flows out from the rear end of the cylinder head, and flows to the outer circulation under the action of the thermostat and various water pipes; the invention of Chinese patent application number: 200910172940.8 discloses an engine cooling system and cooling method. The cooling system i...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the existing engine cooling system in which the cooling water channels of the cylinder block and the cylinder head are connected in series. The cooling water temperature of the cylinder block is too high, which makes the power, economy and emission of the engine poor and shortens the service life of the engine. It provides a kind of engine with better power, economy and emission and prolongs the service life of the engine. Engine double circuit cooling system and cooling method

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