Audi A4

Since 1994 of release

Repair and car operation



Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
- Injection system
   + System of injection Motronic
   - System of injection MPI and MPFI
      Additional functions
      Knots of system of injection
      Functioning
      Adjustment by means of a ljambda-probe
      Infringements in work and self-diagnostics
      The self-help
      The visual control
      Check of knots
      Dismantle of separate details
      Cable throttle заслонки
      Inlet collector
      Idling adjustment
      Check of the fulfilled gases
      The help at malfunctions
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics



System of injection MPI and MPFI

The gasoline expense

To hi-tech engines Audi electronics too helps a few «to bridle thirst» the engine. At walking speed Audi 8,5 l on 100 km completely can manage. On the other hand, will not make a problem to increase the expense of fuel more than to 12 l by 100 km.

Injection

In the six-cylinder engine with working volume 2,8 l the system of injection MPI is established. Behind abbreviation MPI reduction of English name Multi Point Injection – multidot injection disappears. (An identification sign of system of injection MPI the measuring instrument of a stream of fresh air in воздухозаборном a hose behind on the right in an impellent compartment is.)

System of injection of fuel MPFI of the engine almost identical to it of 2,6 l is named by this abbreviation only for difference which is deciphered as Multi Point Fuel Injection – multidot injection of fuel. (An identification sign: absence of a measuring instrument of a stream of fresh air.)

Distinctive sign of these two systems is the way of measurement of quantity (or weights) soaked up air:

  • MPI does it by means термоанемометрического a wire flowmeter of air.
  • In MPFI for these purposes the gauge of pressure of air in an inlet collector (it is built in the block of management and is connected by a hose with an inlet collector), and also the gauge of temperature of soaked up air (in an inlet collector) is used.