working principle:
As the core component of the internal combustion engine cooling system, the thermostat has an important impact on the internal combustion engine's fuel economy and emissions while ensuring the normal operation of the internal combustion engine.
When the cooling temperature is lower than the specified value, the fine 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. Small loop. When the coolant temperature reaches the specified value, the paraffin wax begins to melt and gradually becomes liquid, and the volume increases and compresses the rubber tube to shrink it. When the rubber tube is contracted, an upward thrust is applied to the push rod, and the push rod has a downward reverse thrust on the valve to open the valve. 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. Most thermostats are arranged in the water outlet pipeline of the cylinder head. This has the advantage of simple structure and easy removal of air bubbles in the cooling system;
