When the engine working temperature is low (below 70☌), the thermostat automatically closes the passage to the radiator and opens the passage to the water pump. The advantage of this is that the structure is simple and the bubbles in the cooling system are easily discharged the disadvantage is that the thermostat is often opened and closed during operation, causing oscillation ģ. Most of the thermostats are arranged in the water outlet pipe of the cylinder head. At this time, the coolant flows through the radiator and the thermostat valve, and then flows back to the engine through the water pump for a large cycle. The downward thrust force opens the valve. The push rod has a positive effect on the valve. When the rubber tube shrinks, it exerts an upward thrust on the push rod. The volume increases and presses the rubber tube to shrink it. When the coolant temperature reaches the specified value, the paraffin wax begins to melt and gradually becomes liquid. When the cooling temperature is lower than the specified value, the refined paraffin in the thermostat body is solid, the thermostat valve closes the passage between the engine and the radiator under the action of the spring, and the coolant returns to the engine through the water pump to carry out the inside of the engine. The thermostats currently in use are mainly wax-type thermostats, which control the circulation of the coolant through the principle of thermal expansion and contraction of the paraffin wax inside. Change the circulation range of the coolant to adjust the heat dissipation capacity of the cooling system Ģ. The thermostat is an automatic temperature regulating device, usually containing temperature sensing components, which open and close the flow of cooling liquid by expansion or contraction, that is, automatically adjust the amount of water entering the radiator according to the temperature of the cooling liquid. Make the engine reach the best working condition as soon as possible, and also make the warm air heat up quickly.ġ. It is to make the engine heat up quickly. In order to quickly increase the temperature of the intake pipe and make full use of the heat in the cylinder, a thermostat is added. When the engine is just started, the water temperature is low (especially in winter), and the temperature in the cylinder is very high when the engine is just started. Because the normal operating temperature of the engine is 85℃_95℃, the fuel combustion is the most complete, the fuel consumption is the lowest, and the emissions are the best. The thermostat is a component installed between the engine cylinder head and the water tank.
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