Thermostat is a device for maintaining a static (constant) temperature, as its name implies. There are thermostats of different designs in many devices and mechanisms, from water heaters to refrigerators. There is also a thermostat in a car's internal combustion engine (liquid-cooled, of course). In a car, the thermostat regulates the temperature of the coolant (antifreeze): it accelerates the warm-up of a cold engine and provides heat removal from the hot one. Therefore, the engine works more efficiently and more comfortably for the driver, especially in winter - without a thermostat, the stove would usually blew cold air.

1. bB II (QNC2_)
2. YARIS (_P9_)
3. YARIS/VITZ (_P9_)
4. VITZ (_P9_)
5. YARIS (_P1_)
6. ECHO (_P1_)
7. YARIS/VITZ (_P1_)
8. VITZ/ECHO (_P1_)
9. SIRION (M1)
10. STORIA (M1)
11. TERIOS (J1_)
12. TARUNA (J1_)
13. YRV (M2)
14. YRV MPV (M2)
15. EXTOL Bus (S22_, S23_)
16. EXTOL MPV (S22_, S23_)
17. Atrai Bus (S22_, S23_)
18. SIRION (M3_)
19. BOON (M3_)
20. COPEN (L880_, L881_)
21. See more in applications

The principle of the thermostat work

The classic CALORSTAT by Vernet brand Thermostat, coolant is a movable valve that moves due to a change in the external environment - heating or cooling of antifreeze. The thermostat is made of a thermoelement filled with a substance resembling wax in structure - ceresin, with the addition of copper powder, graphite or aluminum for better thermal conductivity. At a certain temperature of the antifreeze, ceresin expands, opening the thermostat valve. When the motor cools down, ceresin contracts and the thermostat closes again.