Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
- Cooling system
So there is a cooling
Check of level of a cooling liquid
Antifreeze check
Check of system of cooling on tightness
Radiator
Zapornaja cover of system of cooling
The thermostat
The help at malfunctions
The water pump
Klinovoj belt of the water pump
Various models of fans
The vjazkostnyj fan
The fan of a radiator with the electric drive
Infringements in work of the fan of a radiator
The help at malfunctions
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics
The thermostat
Упрощенно speaking, the thermostat is intended to define, whether it is necessary to cool a liquid in a radiator or not, i.e. It makes the decision on, whether the cooling liquid on "small" or on "the big" circle about what it was already told in the beginning of the head should to circulate.
The thermostat regulates a stream of a cooling liquid depending on its temperature. While the temperature of a cooling liquid raises, the thermostat increases a stream of a cold liquid from a radiator. On the contrary, if the working temperature falls, the thermostat spring again wrings out клапанную a plate in position "is closed" (it. Zu) and, thus, blocks inflow of the cooled down cooling liquid until the operational temperature again will not rise.
