Audi A3

since 1997 of release

Repair and car operation



Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
- Power supply system and production of the fulfilled gases
   + Power supply system
   + System of injection of fuel
   + System of injection of the diesel engine
   + System of production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema







Power supply system and production of the fulfilled gases

GENERAL INFORMATION

Specifications

ATTENTION

Separate characteristics are provided also in the text of Head and in case of obligation of their performance are allocated with a bold print



Fuel

Petrol engines
All models, except 132 kW (AJQ) equipped with engines: Unleaded gasoline is not worse AI-95
Application of unleaded gasoline not worse AI-91 is allowed, thus engine capacity decreases.

Models with engines of 132 kW (AJQ): Unleaded gasoline is not worse AI-98. Application of unleaded gasoline not worse AI-95 is allowed, thus engine capacity decreases.
Diesel engines
Diesel fuel
on DIN EN1) 590 Tsetanovoye number not less than 49
Biodiesel fuel
on Е DIN 51 606 RME (methyl air of vegetable oil)
Almost does not contain some sulfur. Therefore at RME combustion almost are absent allocation of dioxide of sulfur (S02).

Fulfilled gases contains less:
– oxides of carbon,
– hydrocarbon,
– soot.

Decrease in capacity and increase in fuel consumption can take place insignificant.

In a cold season mainly fill diesel fuel. RME application is allowed at temperature to – 10°С.

At temperature less – 10°С it is necessary to add diesel fuel in a proportion 1: 1 to prevent RME fuel folding.

In winter conditions

When using summer option of diesel fuel at temperature below 0°С there can come interruptions in operation of the engine that speaks a fuel gusteniye as a result of paraffin allocation.

Therefore apply "winter" diesel fuel. Depending on brand winter fuel provides uninterrupted operation at temperatures from – 15°С to – 22°С.

Do not add gasoline to diesel fuel, etc. razzhizhitel.

At poor quality of fuel water removal from a settler of the fuel filter probably is required to be made more often than it is provided by the schedule THAT.

For removal of water unscrew a hand a carving stopper in the lower part of the filter. The water congestion in the filter can lead to violations of operation of the engine.
Fuel tank
Volume of 55 l or 62 l on models with a full drive including a reserve stock 8 l
System of injection of the petrol engine
1.6 AEH Simos 2.1/Simos 2.2
1.8 AGN Motronic 3.8.5
1.8 AQA Motronic ME7.5
1.8T AGU Motronic 3.8.3
System of injection of the diesel engine Electronic with direct injection, a turbo-supercharging and cooling of nadduvayemy air
Turns of idling, rpm
AEH 760-880
AGN 760-840
AGU, AQA 800-920
AJQ, APY  
1.9 TDI 875-950
The content in the fulfilled gases on single turns
WITH, % Max. 0.5
NANOSECOND, ppm 100
CO2, % 14.5-16.0
CO2, % 0.1-0.5
The contents WITH on 2500-2800 rpm, % 0.3
Value lambda 0.97-1.03
Maximum turns, rpm
AEH 6350
AQA, AGN, AGU 6800
Other petrol engines 6500
TDI (AGR, ALH) 4900-5100
TDI (AHF) 4800-5200
Adjustment of number of turns of idling and limiting number of turns within maintenance is not required.
Regulator of pressure of fuel
Pressure of fuel, bar at single turns and  
the put-on vacuum hose 2.5
the removed vacuum hose 3.0
through 10 mines after a stop (at 20°С) 2.0
Injectors
Injection volume for 30 with, ml
AGN 85-105
AGU 110-130
AQA 133-157
Resistance of injectors (at 20°С), Ohm
AGN, AGU 12-15
AQA 12-17
AEH 14-17
Resistance of the sensor of temperature of a cooler, Ohm / ° With 275-375/80
Resistance of turns/VMT sensor, Ohm 450-1000
Resistance of a heater lambda probe, Ohm 1–5
Nozzles
Pressure of injection of fuel
New nozzles, bar 190-200
Wear limit, bar 170
Resistance
The sensor of turns of the engine between contacts 1 and 2, kiloohm 1.0-1.5
Switch of a pedal of a brake/stoplight or coupling pedal, Ohm
The pedal is pressed it is opened
The pedal is not pressed less 10
The sensor of moving of a needle (at a nozzle of the 3rd cylinder), Ohm 80-120
Pressure of pressurization of a turbokompressor of the diesel engine
Release models till 02.94
At movement on the 3rd transfer with speed of 40 km/h completely squeeze out gas. When speed will reach 80 km/h pressure should make 1.50-1.65, bar
Release models from 03.94
Disconnect э / the magnetic valve of management of pressure. At movement on the 3rd transfer with turns 1500 in minute completely squeeze out gas. On reaching 3000 rpm pressure should make 1.55-1.75, bar
Efforts of a tightening of carving connections
The moments of an inhaling of fixture are given also in the text of Head and on some иллюстрациях*.

*vydelenny in the text a bold print the moments of an inhaling are subject to exact observance; the efforts not allocated with a bold print are given only roughly
The Hall sensor on a head of cylinders 10 H of m
The inlet pipeline to a head of cylinders
Petrol engines 10 N of m
Diesel engines 25 N of m
Final collector on a head of cylinders 25 H of m
Connections of collars 40 H of m
The oxygen sensor to the catalytic converter 50 H of m
Other болтовые / flange connections 25 H of m
Reception pipe to a final collector / turbokompressor (бенз.) 40 H of m
Reception pipe to a final collector / turbokompressor (diesel engine) 25 H of m