The engine cooling system performs the following major functions: The main function of the cooling system is to eliminate additional heat from the engine and prevent the engine from overheating. It ensures the normal operating temperature of the engine. It increases the temperature of the cold engine when needed.
The 31-00099 reference guide provides detailed information on the features, functions, configuration, and troubleshooting of the Honeywell BACnet FF thermostats, models TB3026B and TB3026B-W. Learn how to use these versatile devices for various applications, such as fan coil, heat pump, and roof top equipment control. 5.3.1 Components of Water Cooling System Thermostat Radiator Engine Pump Figure 5.4 : Water Cooling System using Thermostat Valve Filler cap Thermostat valve By pass pipe Fan Upper tank House pipe Water jackets around the cylinders Cylinders Radiator tubes Lower tank Drain tap Water pump Figure 5.5 : Water Cooling System of a 4-cylinder Engine Specifically, the thermostat’s principal function is regulating the coolant flow between the engine and the radiator. For the uninitiated, the engine coolant flows through the engine and picks up excess heat. Then the hot liquid coolant will flow back to the radiator to cool down the excessive heat before it flows back to the engine. The primary job of the cooling system is to keep the engine from overheating by transferring this heat to the air, but the cooling system also has several other important jobs. The engine in your car runs best at a fairly high temperature. When the engine is cold, components wear out faster, and the engine is less efficient and emits more

HSW ­­The thermostat's main job is to allow the engine to heat up quickly, and then to keep the engine at a constant temperature. It does this by regulating the amount of water that goes through the radiator. At low temperatures, the outlet to the radiator is completely blocked -- all of the coolant is recirculated back through the engine.

An electromechanical thermostat typically contains either a bi-metal coil or a metal strip. When the temperature changes, this coil or strip will move, causing a vial containing mercury to tip to one side. The mercury flows to one end of the vial, signaling that the heating or cooling needs to be turned on. Regardless of the kind of thermostat
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    • function of thermostat in cooling system