Optimization of cooling medium flow circuit
The ideal thermal working state of internal combustion engine is that the temperature of cylinder head is low and the temperature of cylinder is relatively high. Therefore, a split flow cooling system IAI has emerged, in which the structure and installation position of thermostat play an important role. For example, the widely used installation structure of combined operation of two thermostats, two thermostats are installed on the same support, and the temperature sensor is installed at the second thermostat, 1 / 3 of the coolant flow is used to cool the cylinder block and 2 / 3 of the coolant flow is used to cool the cylinder head.
Thermostat inspection
When the engine starts cold running, if there is still cooling water flowing out of the water inlet pipe of the water supply chamber of the water tank, it indicates that the main valve of the thermostat cannot be closed; When the engine cooling water temperature exceeds 70 ℃, and there is no cooling water flowing out of the water inlet pipe of the upper water chamber of the water tank, it indicates that the main valve of the thermostat cannot be opened normally, so it needs to be repaired.
