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>> Cover of airinflow and vacuum system

Fig. 14.9. A cut of an airdistributing box with the closed cover of airinflow (at the upper right) (access of atmospheric air is stopped): 1–airinflow cover; 2–vacuum servo-driver


The cover of airinflow 1 (fig. 14.9) sets amount of the air brought to system of ventilation. The drive of a cover provides its closing when switching the switch of the fan in situation "0" or "Off". At operation of the fan the cover of airinflow opens, providing access atmospheric air to an airdistributing box. At turning on of the conditioner in a mode of the maximum cooling, the servo-driver 2 works and closes a cover, blocking air access then the retsirkulyatsiya of air selected from salon begins.

Fig. 14.10. Vacuum system of a drive of a cover of airinflow: 1–control valve; 2–to the engine; 3–vacuum tank; 4–the control valve with the highway of selection of air; 5–flange of unions of a radiator of a heater; 6–vacuum servo-driver; 7–dvukhkhodovy gate; 8–tee


The vacuum system (fig. 14.10) provides closing or opening of a cover of airinflow. The arrow about the control valve 4 specified the stream direction. The stream should be directed towards a vacuum source — to the highway of pumping of the vacuum amplifier of brakes. The double-thread gate with the electric drive connects the vacuum highway to the servo-driver 6 of a cover of airinflow at switching off of the fan or at position of the switch of the conditioner «Move А/С».