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The arrangement of thermostat
The coolant of the general water cooling system flows into the body and out of the cylinder head. Most of the thermostat is arranged in the cylinder head outlet line. The advantage of this arrangement is that the structure is simple and the bubbles in the water cooling system are easily eliminated. The disadvantage is that oscillation occurs when the thermostat is working.
For example, when starting a cold engine in winter, the thermostat valve is closed due to the low coolant temperature. When the coolant is in small circulation, the temperature rises quickly and the thermostat valve is opened. At the same time, the low-temperature coolant in the radiator flows into the body, making the coolant cold again, and the thermostat valve is closed again. When the coolant temperature rises again, the thermostat valve opens again. Until the temperature of the coolant is stable, the thermostat valve tends to be stable and no longer repeatedly opened and closed. The phenomenon of the thermostat valve repeatedly opening and closing in a short period of time is called thermostat oscillation. When this phenomenon occurs, it will increase the fuel consumption of the car.
The thermostat can also be arranged in the outlet pipe of the radiator. This arrangement can reduce or eliminate the thermostat oscillation phenomenon, and can accurately control the coolant temperature, but its structure is complex, the cost is high, and it is mostly used for high-performance cars and cars that often travel at high speed in winter.
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What is a thermostat?2024-06-06
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