Audi A4, S4
Controls and receptions of safe operation
Current leaving and service
- Systems of cooling, heating and the air conditioner
- Systems of ventilation, heating and air conditioning
The general information and security measures
Removal and installation of the air snuffled
Removal and installation of the electric motor of a drive ventilating заслонки
Removal and installation of the block of management by a heater/conditioner
Removal and installation of the electric motor of a drive of the fan of a heater and the conditioner
Removal and installation of the gauge of temperature of external air
Removal and installation of an additional heating element
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
текущий ремонт смета
Systems of ventilation, heating and air conditioning
The general information and security measures
The scheme of a contour of the conditioner of air
The case of a heater with the heat exchanger and an additional heater
Elements of a central air of air of salon
Removal of the evaporator of the conditioner of air
Address also to Section the Heater, ventilation and air conditioner.
Works with a central air should be carried out by experts.
Fresh air for heating and ventilation system is sucked in by the electrofan. Before receipt in salon air is cleared by filters of rough and thin clearing.
Air conditioner is capable as to warm up (in a heater radiator) and to cool (in the conditioner evaporator) and to drain air arriving in salon. In the crude weather, arriving fresh air preliminary it is cooled, then again heats up to the set temperature. Thus there is a condensation of an excessive moisture of air, i.e. its drainage. Thus it is eliminated запотевание glasses.
Then air is distributed on ventilating nozzles in car salon.
Through a heater radiator constantly there passes a hot cooling liquid of system of cooling of the engine. For regulation of the expense of air in car salon the built in fan of fresh air can work at several steps.
If fresh air outside does not to be sucked in, for example, at poor quality of air, the system can be switched to a circulation mode. In this mode in salon internal air circulates only. If it proceeds long enough time, glasses in salon mist over.
The conditioner consists of a heater and a refrigerator. A conditioner refrigerator - from the compressor, the condenser, a throttle, the evaporator, capacity with a coolant and pipelines. In system the coolant (type R134а) which, depending on temperature and pressure, can be in liquid or a gaseous state circulates.
The conditioner compressor is resulted in rotation from a cranked shaft of the engine by means of a ridge belt. He creates pressure to 30 атм. In a contour of cooling of installation owing to what the coolant representing gas, heats up. In the condenser the coolant is cooled by external air (not arriving in salon).При it разогретый a coolant is condensed, turning to a liquid. Having the big pressure, it is passed through a throttle therefore its pressure falls. After that the coolant evaporates, simultaneously strongly being cooled. In the evaporator the coolant selects heat from air blown through it. Air is cooled. Cooled air arrives in car salon. As a result of heating in the evaporator the coolant turns to gas and under low pressure arrives in the compressor then circulation process repeats.
On models with the diesel engine the additional heating element which is coming into effect at low external temperature is established. The heating element is directly behind the heat exchanger. After engine start, depending on external temperature, it within several seconds heats up cold air arriving in the car.
If in a heater or climatic installation there is a malfunction, it is fixed in memory of malfunctions. The information from memory can be the device for reading of malfunctions считана.
To order the car can be equipped by the automatic, elektronno-operated conditioner at which temperature of air of the driver and forward passenger are regulated separately. In addition, through the connecting hose going from the conditioner to a ware box, the refrigerating box if it is available in a ware box can be cooled.
The mode of automatic work provides automatic maintenance of temperature in salon and deletes a moisture from air. Besides, air temperature, its quantity and distribution are automatically regulated and fluctuations of external temperature are compensated. In an economic operating mode the conditioner is switched off, but the heater and ventilation system continue to work. By switching-off of the conditioner the conditioner compressor does not work, therefore fuel is saved. At diesel engines additional heating, besides, is switched off. It also results economy of fuel.
Security measures at service of the air conditioner
The central air should be served by exclusively prepared technicians trained in safe working methods with application of the appropriate equipment with observance of rules of depressurization, acquainted with receptions of gathering and order of storage of an automobile coolant.