VW Passat repair


+ 1. Ekspluatatsiiya of the car
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling system
+ 5. Power supply system
+ 6. Ignition system
+ 7. Coupling
+ 8. Transmission
+ 9. Drive of forward wheels
+ 10. Suspension brackets
+ 11. Steering
+ 12. Brake system
+ 13. Wheels and tires
- 14. Systems of heating, ventilation and conditioning
   14.1. Technical characteristics
   14.2. General information
   14.3. Central air with a circulating coolant
   14.4. Precautionary measures at central air service
   + 14.5. Search of malfunctions
   14.6. Conditioner filling by a coolant
   14.7. Search and elimination of malfunctions in heating and conditioning systems
   14.8. Airdistributing box
   14.9. Fan
   14.10. Cover of airinflow and vacuum system
   14.11. Vozdukho-priyemnik
   + 14.12. Heater fan
   + 14.13. Management cables
   + 14.14. Central air units
   + 14.15. Basic provisions on conditioner service
+ 15. Electric equipment
+ 16. Body
+ 17. Electric circuits


Repair B3-B4/Passat B3-B4 Volkswagen Passat>> Systems of heating, ventilation and conditioning>> Central air with a circulating coolant
The drive of the compressor of the conditioner is carried out from a pulley on a forward part of the crankshaft. Inclusion and switching off of the compressor is provided with automatically electromagnetic coupling which makes central air start-up for maintenance of working pressure in the necessary limits. In a broad tank with a moisture separator removal of small amounts of moisture and dirt from system is provided.
The sensor of pressure of central air provides switching off of the electromagnetic coupling of the compressor at too low pressure (at insufficient quantity of a coolant) or at too high (for maintenance of working pressure in the necessary limits). The sensor also includes the second speed of rotation of the fan обдува a radiator (and the condenser) in process of pressure increase in system. The control valve of a broad tank provides pressure dumping at excess of the most admissible safe level.

Fig. 14.4. Arrangement of elements of management of system of heating and conditioning: 1–external temperature sensor; 2–top temperature sensor; 3–bottom temperature sensor; 4–the temperature sensor with electronic control of the conditioner; 5–electronic control unit of the conditioner; 6–panel of the electronic block; 7–control unit; 8–management handle; 9, 10 – an overlay of the control panel; 11-control unit heater; 12, 13, 14, 15 – management cables; 16-executive engine; 17-photosensor of electronic control of the conditioner


Fig. 14.5. An arrangement of units and central air knots in a motor compartment and a vacuum drive of a zaslonka рециркуляции / inflow: 1–union of a vacuum hose (drive of a cover of airinflow); 2–relay of the electromagnetic coupling of coupling of the compressor of the conditioner and fan relay обдува heater radiator; 3–vacuum tank; 4–dvukhkhodovy distributor of a drive of a cover of airinflow; 5–control vacuum gate; 6–condenser; 7–compressor of the conditioner and electromagnetic coupling of coupling of the compressor; 8–a broad tank with a moisture separator and a safety valve; 9–service cap of the valve of a high pressure; 10-sensor of pressure of turning on of the conditioner; 11-sensor of temperature of zabortny air; 12-service cap of the valve of low pressure; 13-broad valve; 14-drainage valve of the evaporator


The sensor of temperature 1 (fig. 14.4) of atmospheric air prevents turning on of the electromagnetic coupling of the compressor at too low temperature of atmospheric air. The broad valve 13 (fig. 14.5) provides maintenance of stable temperature in system by tracking of temperature of a stream of a coolant on an exit from the evaporator.
On fig. 14.5 the vacuum system which puts in action a vacuum drive of a cover of airinflow is also shown. The drive of a cover of airinflow is provided with giving of the razryazheniye created by the engine, on the double-thread electromagnetic distributor.







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