The Role of the Thermostat in a Car?

[Reese]

Below is an introduction to the functions of the thermostat: 1. It controls the circulation of coolant between the engine and the radiator. When the coolant temperature is relatively low, the thermostat remains closed, allowing only the coolant within the engine to heat up. This is referred to as the "small cycle." When the coolant in the engine reaches a certain temperature, the thermostat automatically opens, connecting with the radiator to form what is called the "large cycle." 2. It automatically adjusts the amount of coolant entering the radiator based on the coolant temperature, altering the range of the coolant cycle to regulate the cooling system's heat dissipation capacity, ensuring the engine operates within an appropriate temperature range. 3. The thermostat must maintain good technical condition; otherwise, it can severely affect the engine's normal operation. For example, if the main valve of the thermostat opens too late, it can cause the engine to overheat. Conversely, if the main valve opens too early, it prolongs the engine's warm-up time, resulting in the engine running at too low a temperature.