Audi 80/Avant (B4)

Models Audi 80 are completed with five petrol engines. The scale of engines is stretched from economic 4-cylinder motors to comfortable and powerful variants, such as single-row 5-cylinder and V-shaped 6-cylinder engines. In particular, it:

• The 2,0-litre 4-cylinder engine capacity of 66 kw (90 h.p.)
• The 2,0-litre 4-cylinder engine capacity of 85 kw (115 h.p.)
• The 2,3-litre 5-cylinder engine capacity of 98 kw (133 h.p.)
• The 2,6-litre V-shaped 6-cylinder engine capacity of 110 kw (150 h.p.)
• The 2,8-litre V-shaped 6-cylinder engine capacity of 128 kw (174 h.p.)

4-cylinder engines

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

The increase in volume to 2 l has occurred in 1988 on the basis of "grown up" to this time to 1,8 l of the unit. Additional cubic centimetres go on advantage first of all to a twisting moment.

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

Distinctions of both 4-cylinder engines consist mainly in gas mixture preparation: while the 4-cylinder engine capacity of 66 kw (90 h.p.) the version as capacity of 85 kw (115 h.p. works on the normal gasoline AI-92 not containing lead arriving through one atomizer (the central injection).) it is supplied by system of injection Digifant. In this case through own atomizer in each cylinder gasoline AI-95 (euro super) arrives. Bezdetonatsionnaja adjustment of an advancing of ignition (you will find an explanation in the head ignition System) does possible work of the engine and on gasoline AI-92, and without any unpleasant consequences for the motor.

The 5-cylinder engine

The reliable and unpretentious 2,3-litre 5-cylinder single-row engine for the 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 a camshaft at constant level.

In it 5-cylinder the engine with system of injection KE-III-Jetronic and system of ignition with programmed control process of combustion of fuel is supervised by the gauge of a detonation established on everyone cylinder so this power unit optimum uses неэтилированный gasoline AI-95 at compression degree 10,0:1. As a substitute it is possible to use and gasoline AI-92 (normal).

The maximum capacity of 98 kw (133 h.p.) the 5-cylinder engine reaches at 5500 rpm, and the maximum twisting moment 186 Nm at 4000 rpm. The wide diagramme of a twisting moment provides dynamism on low and average frequencies of rotation crankshaftа.

Engine V6

2,8 l

The V-shaped 6-cylinder engine is equipped by electronic system of injection of fuel MPI with a measuring instrument of weight of air which supervises quality of a mix for each cylinder separately and consequently reduces the expense of fuel and reduces quantity of harmful substances in the fulfilled gases. Behind process in the cylinders, created at combustion, two gauges of detonation combustion which are carrying out the selective control of a detonation "watch". It prevents negative consequences which can arise at application of fuel with too low octaneым number.

Interesting detail of this engine is so-called the inlet wire with changeable length of a path which provides presence of a high twisting moment in a wide range of frequency of rotation. Six valves in the inlet pipeline with changeable length of a path are put in action by depression and cope depending on number of turns: to 4000 rpm they form long pipelines for achievement of a high twisting moment. Over 4000 rpm – short pipelines for achievement большей capacities. V-shaped 6-cylinder engine Audi reaches the maximum twisting moment 245 Nm at 3000 rpm on gasoline AI-95. At application of gasoline AI-98 (super plus) it develops euro 250 Nm. In a wide range of frequencies of rotation from 2000 rpm to 5000 rpm at the disposal of the driver are a minimum 220 Nm a twisting moment.

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

2,6 l

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

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