Audi A4, S4

since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Governing bodies and receptions of safe operation
+ Current leaving and service
- Engine
   Removal and installation of the top cover of the engine / bottom protection of an impellent compartment/stretcher
   Compression check in engine cylinders, identification of leaks
   Engine check by means of the vacuum gage
   + 4-cylinder petrol engines
   + 6-and 8-cylinder petrol engines
   + 4-cylinder diesel engines
   + 6-cylinder diesel engines
   - System of greasing of the engine
      General information
      Applied impellent oils. Consumption of oil
      Oil pump and case pallet
      Check of pressure of oil and pressure sensor
+ Systems of cooling, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


System of greasing of the engine

General information

Engines are equipped with circulating system of greasing under pressure.

The oil pump sucks in oil through a grid from the pallet of a case and submits it under pressure to system via the oil filter. On an exit from the oil pump there is a reduktsionny valve. At pressure increase above the established value the valve opens and the part of oil merges back in the case pallet.

Through the central opening of the oil filter oil arrives directly to the main canal. At a contamination of the oil filter perepuskny the valve directs oil to system to not filtered.

From the trunk oil main channels for greasing of bearings of a cranked shaft branch off. Through inclined openings in a cranked shaft oil moves to shatunny bearings. For cooling of pistons oil is injected on them from below through nozzles.

At the same time oil through vertical galleries reaches heads of cylinders and arrives for greasing of bearings of camshafts and elements of klapanny mechanisms of system of a gazoraspredeleniye.

Depending on engine capacity oil can be cooled in the additional maslookhladitel located sideways, at the case of the oil filter and included in a contour of system of cooling of the engine.