Audi A4, S4
Controls and receptions of safe operation
Current leaving and service
- Systems of cooling, heating and the air conditioner
- Cooling system
The general information
Antifreeze - a protection frame from freezing
Replacement of a cooling liquid
Removal and thermostat installation
Replacement of hoses of system of cooling
Removal and radiator installation
Removal and installation of the fan of a radiator
Removal and installation of the pump of a cooling liquid
Systems of ventilation, heating and air conditioning
Power supply systems, release and decrease in toxicity of the fulfilled gases
Systems of an electric equipment of the engine
Manual box of a gear change
Coupling, power shafts and differential
Suspension bracket and steering
Onboard electric equipment
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The general information
The scheme of connections of hoses of system of cooling
On some models the system of regulation of temperature of the cooling liquid, working on put in the block of management to the characteristic is applied. In comparison with usual system of cooling such system raises thermodynamic efficiency of the engine and thus optimises the twisting moment characteristic.
The system of the cooling working under the set characteristic, consists of the distributor of a cooling liquid with the thermostat, an electric heating element, and also springs, for mechanical lock-out of channels of a cooling liquid.
By means of the warmed up thermostat the temperature of a cooling liquid is regulated by the engine management block under the characteristic put in it. The temperature, optimum from the point of view of given capacity of the engine is thus supported.
For example, at full loading of the engine the extending element heats up and thus the thermostat opens more. The temperature of a cooling liquid that leads to more intensive cooling of chambers of combustion Thereby decreases. Colder chambers of combustion lead to earlier ignition and by that to increase in a twisting moment of the engine.
The cooling liquid goes through a radiator constantly working pump. The liquid passes through a radiator from top to down and is cooled by air passing through it. The fan of a cooling liquid with the electric drive is applied.
Heater and ventilation
The heater consists of fans and the heat exchangers located in blocks of forward and back parts of salon. The hot cooling liquid passes through heat exchangers. At moving of the handle of management by modes of the heater, located on the control panel, valves open, and hot air starts to arrive in car salon. If to include the heater fan, air will move in salon compulsorily.
Intaking air before getting to salon, passes through the filter (address to the Head Current leaving and service). The basic share of particles of a dust will settle in the filter. It is necessary to observe periodicity of replacement of the filter. The filter littered by a dust will limit air giving in salon that will lead to a stagnation of air in salon.
Distribution of streams of air of system of ventilation is carried out with the help заслонок. The air circulation mode is provided. Заслонки cope servo-drivers.