Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car



Audi 80/Avant
- Technical specification
   Engines
   Transmissions
   Body
   Chassis
   15-inch wheels
   Brake system
   Seats
   Passive safety
   Four-wheel drive
   Distributive Torsen-differential
   Dynamics of the movement at a dry paving
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   Organization of a workplace
   Lubricant works
   Oil consumption
   Right choice of engine oil
   Replacement of engine oil and oil filter
   Check of level of working liquid of the power steering
   Check of level of oil of the mechanical transmission
   Check of level of oil in the drive of the back bridge
   Control of the ATF level in the automatic transmission
   Check of level of oil in the main transfer of the automatic transmission
   ATF replacement
   Lubricant of hummock drives, hinges and locks
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signaling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications





Engines

The Audi 80 models are completed with five petrol engines. Scale of engines stretches from economic 4-cylinder motors to comfortable and powerful options, such as single-row 5-cylinder and V-shaped 6-cylinder engines. In particular, it:

  • 66 kW 2,0-liter 4-cylinder engine (90 hp)
  • 85 kW 2,0-liter 4-cylinder engine (115 hp)
  • 98 kW 2,3-liter 5-cylinder engine (133 hp)
  • 110 kW 2,6-liter V-shaped 6-cylinder engine (150 hp)
  • 128 kW 2,8-liter V-shaped 6-cylinder engine (174 hp)

The though externally almost not changed, present Audi 80 car became "much more adult" in comparison with generation predecessor. The shortcoming which was often criticized earlier – too small luggage carrier – is completely eliminated now. Besides, on Audi there is a new back bridge providing to the car considerable steadier behavior during the movement now.

4-cylinder engines

Both 4-cylinder engines which complete Audi 80 have the volume of 2 l. This two-liter 4-cylinder engine is well-known on numerous model series predecessors. Its roots leave in 1972 (then its volume still made 1,3 and 1,5 l).

Increase in volume up to 2 l took place in 1988 on the basis of the unit which "grew up" by this time to 1,8 l. Additional cubic centimeters do well first of all to torque.

Every time other novelties, this time reacting to warmly tension roller keeping the constant level of a tension of the GRM gear belt at various temperatures of the engine are added to increase in volume. This measure led to increase in service life of a gear belt. Something almost already by itself разумеещееся: valves are put in action by the hydraulic pushers which are not demanding servicing.

Distinctions of both 4-cylinder engines consist mainly in preparation of gas mixture: while the 66 kW 4-cylinder engine (90 hp) uses the normal AI-92 gasoline which is not containing lead arriving through one nozzle (the central injection), the 85 kW version (115 hp) is supplied with system of injection Digifant. In this case through own nozzle AI-95 gasoline comes to each cylinder (euro super). Bezdetonatsionny adjustment of an advancing of ignition (you will find an explanation in the head Sistema of ignition) does possible operation of the engine and on AI-92 gasoline, and without any unpleasant consequences for the motor.

5-cylinder engine

The reliable and unpretentious 2,3-liter 5-cylinder single-row engine for last years constantly was exposed to technical improvements. So, for example, it is supplied already mentioned reacting on warmly tension roller which provides a tension of a gear belt of the camshaft at the constant level.

In it 5-cylinder the engine with system of injection KE-III-Jetronic and system of ignition with program control process of combustion of fuel is controlled by the detonation sensor installed on each cylinder so this power unit optimum uses unleaded AI-95 gasoline at extent of compression 10,0:1. As substitute it is possible to use also AI-92 gasoline (normal).

The maximum power of 98 kW (133 hp) the 5-cylinder engine reaches at 5500 rpm, and the maximum torque of 186 N • m at 4000 rpm. The wide chart of torque provides dynamism at low and average frequencies of rotation of the crankshaft.

V6 engine

2,8 l

The V-shaped 6-cylinder engine is equipped with electronic system of injection of MPI fuel with the measuring instrument of mass of air which controls quality of mix for each cylinder separately and therefore reduces fuel consumption and reduces amount of harmful substances in the fulfilled gases. The process in cylinders created at combustion is "monitored" by two sensors of detonation combustion exercising selective control of a detonation. It prevents negative consequences which can arise at use of fuel with too low octane number.

Interesting detail of this engine is so-called the inlet wire with a changeable length of a path which provides existence of high torque in the wide range of frequency of rotation. Six valves in the inlet pipeline with a changeable length of a path are put in action by depression and are operated depending on speed: to 4000 rpm they form long pipelines for achievement of high torque. Over 4000 rpm – short pipelines for achievement of bigger power. The V-shaped 6-cylinder Audi engine reaches the maximum torque of 245 N • m at 3000 rpm on AI-95 gasoline. At use of AI-98 gasoline (euro super plus) it develops 250 N • m. In the wide range of frequencies of rotation from 2000 rpm to 5000 rpm at least 220 N • torque m are at the disposal of the driver.

The system of ignition of the V-shaped 6-cylinder engine does without mechanical distributor of ignition.

2,6 l

For the first time on Audi 80: 6-cylinder V-shaped engine.

Streams of the fulfilled gases of the left and right number of cylinders go to two catalytic converters working separately. Thanks to existence two warmed a lambda probes separate regulation of the fulfilled gases for each number of cylinders is provided.

The 2,6-liter 6-cylinder engine appeared as slightly "lost weight" version only in August, 1992. Slightly modified system of injection (MPFI) applies other method of measurement of air. Also in this engine there is no inlet gas pipeline with a changeable length of a path. But at the developed 110 kW at 5750 rpm and 225 N • m at 3500 rpm about a lack of power out of the question.

Functioning of the inlet gas pipeline with a changeable length of a path: at the left a way of the let-in air at the speed of smaller 4000 rpm, on the right a way of the let-in air at the speed exceeding this size.








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