Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
- Air filter and absorption channels
   Dismantle of the loose leaf of the air filter
   Purge of the loose leaf of the air filter
   Replacement of the loose leaf of the air filter
   Preliminary heating of soaked-up air
   Being switched inlet collector
+ 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





Being switched inlet collector

The six-cylinder engine with working volume of 2,6 l has no being switched inlet collector. Its inlet collector consists of the knots shown here. Here the special attention is given to small weight of a design.


By Zaslonki of a being switched inlet collector at the six-cylinder engine with working volume of 2,8 l are put in action by means of a vacuum box (2) by means of a vacuum hose (1). This box should not be confused to a vacuum box (3) systems of adjustment of speed (an additional complete set).


The valve (1) switching of a register inlet collector defines, whether there should be in a vacuum box a vacuum. He receives a signal about switching on a wire (2) from the control unit injection. Then the vacuum from a tube (3) inlet collectors can move to a tube (4) vacuum boxes. The valve is established behind an inlet collector on a so-called shumopoglotitel of soaked-up air.


In the photo fixing bolts (shooters) of an inlet collector are shown.


Here the sequence in which fixing bolts of an inlet collector of the six-cylinder engine with working volume of 2,6 and 2,8 l are tightened is shown. Only this way it is possible to avoid at installation of deformation of an inlet collector.

The six-cylinder engine with working volume of 2,8 l

The high torque even at low frequency of rotation is provided by a long soaking-up tube with small diameter. On the contrary, ensuring big engine capacity at high frequency of rotation needs a short soaking-up tube with big cross-section section. To combine that and another, the Audi firm developed a being switched inlet collector. In it depending on a situation are closed and open six zaslonok. Thanks to it at the disposal of each cylinder there is one of soaking-up tubes of different length and with different diameter: or an inlet collector for providing a torque (a long tube with small diameter) or an inlet collector for capacity support (a short tube with big diameter).

All six zaslonok are put in action by the lowered pressure and cope depending on engine turns: to 4000 rpm they are closed for providing a high torque. Over 4000 rpm they are completely open for capacity support. Below 4000 rpm by means of an inlet collector of a torque about 30 Nanometers in comparison with a moshchnostny inlet collector are won.

The engine with working volume of 2,8 l reaches the maximum torque in 245 Nanometers at 3000 rpm when using gasoline of brand of euro - super (euro-Super); with gasoline super plus (98 ROZ) the torque raises to 250 Nanometers. In a wide range from 2000 to over 5500 rpm on hand there are at least 220 Nanometers.

Check of functioning of a being switched inlet collector

Switching of an inlet collector needs to be checked only if the lack of capacity is observed. In the beginning check a hand ease of a course of the lever mechanism. After that check of functional ability follows: it becomes at the heated-up engine:

 PERFORMANCE ORDER

  1. Start the engine, lift turns much above 4000 rpm.
  2. Observe a vacuum box: draft of management should be delayed back.
  3. If it not so, check vacuum hoses on tightness. If they as it should be:
  4. Check a vacuum box: put on a spare hose connecting knot of a box, intensively suck a mouth.
  5. If draft of management does not move and/or a lot of air can be soaked up, the box is faulty. Replace it. But if box in working condition:
  6. Check the valve of switching of the register of an inlet collector: remove both vacuum hoses from the valve. Put on a spare hose connecting knot of an inlet collector of the valve.
  7. Vigorously suck a mouth a spare vacuum hose. Air should not подсасываться (there is no passableness).
  8. Start the engine, lift turns much above 4000 rpm.
  9. Again vigorously suck a hose. Now air should подсасываться (passableness is).
  10. If still the source of malfunction was not found (that is quite improbable), in a workshop it is necessary to check control.

Dismantle of a being switched inlet collector

The six-cylinder engine with working volume of 2,8 l

 PERFORMANCE ORDER

  1. Dismantle an engine cover.
  2. Disconnect sockets of candles, take out from arms of a wire of a high voltage.
  3. Dismantle a distributive tube of fuel together with all valves of injection (the section System of injection of MPI/MPFI).
  4. Dismantle an inlet hose.
  5. Dismantle the valve of stabilization of idling or disconnect the socket.
  6. Dismantle all vacuum hoses / ventilating hoses of a case on an inlet collector and a butterfly valve branch pipe.
  7. Dismantle a cable of a butterfly valve and the socket of its potentiometer.
  8. Unscrew bolts as it should be, the return to an inhaling in the photo above.
  9. Remove an inlet collector with a butterfly valve branch pipe.
  10. Installation: replace laying.
  11. Tighten fixing bolts of an inlet collector according to sequence in drawing above in four stages. 1st stage: 5 Nanometers, 2nd stage: 10 Nanometers, 3rd stage: 20 Nanometers, 4th stage: once again 20 Nanometers.

Dismantle of an inlet collector of V6 with working volume of 2,6 l

 PERFORMANCE ORDER

  1. Dismantle is carried out the same as at the engine with working volume of 2,8 l.
  2. Concerning sequence of an inhaling of fixing bolts the same rules, as for the engine with working volume of 2,8 l operate.