Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
- Turbo-supercharging
   Turbokompressor
   Valve of switching off of draft
   Check of adjustment of pressure of pressurization
   The help at malfunctions
   The turbokompressor is faulty?
   Radiator of nadduvochny air
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





Valve of switching off of draft

The valve of switching off of draft is built in a connecting hose (the bypass suited) between the soaking-up party and the party of forcing of a turbo-supercharging. Sense of the valve of shutdown of draft in the following:

  1. The high-speed pressure created by a turbo-supercharging, should decrease at the closed butterfly valve ( i.e. at the released pedal of gas). Otherwise the congestion of air would brake frequency of rotation of the compressor. That it not to allow, the valve opens the bypass suited. At the expense of it air leaves towards absorption, and the compressor keeps frequency of rotation.
  2. If the gas pedal, the valve of shutdown of draft to a paste is again wrung out closed. Pressurization works at complete revolutions and can submit the condensed air at once. If pressurization only grew, it would be impossible to gain spontaneously capacity – at the engine would be well-known «турбодыра».

Check of the valve of switching off of draft

If in the engine appreciable delay of increase of capacity after a draft phase is felt, the reason can be in the valve of switching off of draft. Carry out the following check:

 PERFORMANCE ORDER

  1. Dismantle the valve of switching off of draft.
  2. Connect to a thin operating hose of the valve of switching off of draft the vacuum pump or intensively suck it a mouth.
  3. The valve of switching off of draft should open that is well visible through hose junction points.
  4. Take the lowered pressure, whenever possible, during 30 with (if it is necessary, bend a hose).
  5. The valve of switching off of draft should remain at this time in this situation.
  6. Again open a hose: the valve of switching off of draft should be closed.
  7. Zaslonka in the valve of shutdown of draft should open and be closed easily and in each situation densely adjoin.
  8. Installation: the valve of shutdown of draft should be fixed by screw collars in all points of connection of hoses.