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Audi A4, S4
Introduction
Controls and receptions of safe operation
Current leaving and service
- The engine
   Specifications
   Removal and installation of the top cover of the engine / the bottom protection of an impellent compartment/stretcher
   Compression check in engine cylinders, revealing of leaks
   Check of the engine by means of the vacuum gauge
   - 4-cylinder petrol engines
      The general data
      Removal and installation of a gear belt
      Removal and installation of a head of cylinders
      Removal and installation of a belt of a drive of auxiliary units
    6 and 8-cylinder petrol engines
    4-cylinder diesel engines
    6-cylinder diesel engines
    System of greasing of the engine
Systems of cooling, heating and the air conditioner
Power supply systems, release and decrease in toxicity of the fulfilled gases
Systems of an electric equipment of the engine
Manual box of a gear change
Automatic transmission
Coupling, power shafts and differential
Brake system
Suspension bracket and steering
Body
Onboard electric equipment












4-cylinder petrol engines

The general data

1.6 l (ALZ): the Engine рядный, with one верхнерасположенным a cam-shaft (OHC). The Camshaft is located in a head of cylinders and set in motion by a gear belt. The shaft operates on the hydraulic pushers located vertically which in turn influence inlet and final valves.

1.8 and 2.0 l (AVJ, BFB, ALT): the Engine рядный, with two верхнерасположенными cam-shafts (DOHC), has for each cylinder three inlet and two final valves. One camshaft actuates inlet valves, another final. The camshaft of final valves is set in motion from a cranked shaft through a gear belt. Camshafts of inlet and final valves are connected with each other by a chain.

2.0 l FSI (AWA): the Engine рядный, with two верхнерасположенными cam-shafts (DOHC), has for each cylinder on two inlet and final valves.

Petrol 4-cylinder engine FSI of 2.0 l

1 — the ignition Coil
2 — the Camshaft of final valves. On the back end the electric motor of an inclination of a camshaft is located
3 — the Camshaft of inlet valves. On the forward end the rotor of the gauge of the Hall, and on the back end the pump of a high pressure for fuel injection is located. The drive is carried out from a camshaft of final valves through a chain
4 — the Lever
5 — the Injector

6 — the Gear belt
7 — the Oil pump
8 — the Electric motor of an inclination of a camshaft
9 — the Block of management throttle заслонкой
10 — the Inlet pipeline
11 — the vacuum Accumulator
12 — the Platen of switching of the inlet pipeline
13 — the management Electric motor заслонкой the inlet pipeline
14 — the Cranked shaft

One camshaft actuates the inlet valves, the second final valves. The camshaft of final valves (1) is set in motion from a cranked shaft (2) gear belt (3). Camshafts of inlet and final valves are connected among themselves by a chain (4). Behind on distributive to a shaft of final valves the rotary engine (5) with which help automatically to 42 the corner of installation of a camshaft of final valves can be displaced is located. In a back part of a camshaft of inlet valves (6) there is a pump of a high pressure of system of direct injection of gasoline. It is put in action by a double cam (7) camshafts of inlet valves.

Basic elements of a head of cylinders of engines AVJ, BFB, ALT 1.8 l.

1 — the Cover of the bearing of a camshaft of final valves
2 — the Cover of the bearing of a camshaft of inlet valves
3 — Gazoraspredelitelnaja a chain
4 — the Double cover of bearings
5 — the Camshaft of inlet valves
6 — the Pusher
7 — Crackers of the cutting lock
8 — the Cogwheel of a cranked shaft
9 — Klapannaja a spring
10 — the Epiploon

11 Cap
12 — the Gauge of position of a camshaft (CMP)
13 — the Inlet valve
14 — the Epiploon
15 — the Final valve
16 — the Head of cylinders
17 — the Segment stopper
18 — Natjazhitel of a chain
19 — a valve Plate
20 — Maslootrazhatelnyj a cap