Mercedes S-Class W-140

1991-1999 of release

Repair and car operation



Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   + the Power supply system and injection of fuel of the petrol engine - the general information
   + System of injection of fuel of the diesel engine - the general information
   + Control system of injection of fuel and HFM-SFI ignition (6-cylinder petrol engines)
   + Control systems of the LH-SFI and ME-SFI engine (8-cylinder petrol engines)
   + Control systems of injection of fuel and ME-SFI and LH-SFI ignition (12-cylinder petrol engines)
   + Control system of fuel injection (diesel engines of the Om603.971 series)
   + Control system of fuel injection (diesel engines of the Om606.961 series)
   - Turbo-supercharging system - the general information
      Interkuler - the general information, removal and installation
   Systems of decrease in toxicity of release - the general information
   System of production of the fulfilled gases - the general information
   Catalytic converter (petrol models)
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



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Turbo-supercharging system - the general information

Turbokompressor - general information, removal and installation

General information

Turbokompressor design (on an engine 603.971 example)

137а — Pnevmoprivod of the valve operating pressure of pressurization
And — Soaked-up air
In — Forced air
With — the Fulfilled gases rotating the driving wheel of the turbine
D — the Exit of the fulfilled gases
Е — Perepuskna the turbokompressor valve
N — the Pressure head oil pipeline
J — the Return oil pipeline

and — Perepuskna the turbokompressor valve
b — the Rod
with — the compressor Case
d — the Driving wheel of the compressor
е — Connection with the operating highway
and — the turbine Case
g — the Driving wheel of the turbine
h — the turbokompressor Case


Turbokompressor is intended for increase in engine capacity by a way of increase of pressure of air in the inlet pipeline. Air not simply arrives in cylinders, and moves in them under pressure. According to increase in supply of air, TNVD increases supply of fuel.

Function chart of management of pressurization (engine 603.971)

B5/1 — the pressure Sensor
1 — ТНВД
103 — Aneroidny the jack (ALDA)
110 — the Final collector
137 — Turbokompressor
137а — Pnevmoprivod of the valve of the managing director of pressure of pressurization

138 — the Inlet pipeline
And — Soaked-up air
In — Forced air
With — the Fulfilled gases rotating the driving wheel of the turbine
D — the Exit of the fulfilled gases


The turbine of the compressor is given in rotation by the fulfilled gases. Gases, passing through a special casing (a compressor casing), move to the compressor turbine. The turbine rotates on a shaft on which other end there is a compressor wheel in a separate casing. It submits air under pressure to the pipeline.

Between the compressor and the pipeline the intermediate cooler of the compressed air (interkuler) is established. In an interkuler air is cooled, being compressed thus. Partsialnoye pressure of oxygen increases that leads to increase in engine capacity.

Pressure of air in the pipeline is limited to the special sensor. At achievement of limiting pressure the sensor opens a zaslonka, limiting to that supply of the fulfilled gases to the turbine.

The shaft of the compressor is greased with impellent oil which moves on specially intended hose. The shaft constantly "floats" in oil. From the compressor oil is taken away in the pallet on a returnable hose.

Turbokompressor is a component of a final collector and cannot be separated from it.

Precautionary measures

Speed of rotation of turbines of the compressor is huge, and the working temperature is very great. To avoid receiving traumas, and also not to damage a turbokompressor, observe the following precautionary measures:
  • Do not start the engine after removal of any component of a turbokompressor. Hit of extraneous subjects on shovels of turbines can lead to an exit of the last out of operation. You also risk to be traumatized from the subjects thrown out from the turbine;
  • After removal of any components of a turbokompressor or hoses of an air inlet cover it with pure rags;
  • Do not give gas at once after engine start, especially if it is not heated-up. Oil cannot instantly grease a turbine shaft;
  • Never switch off ignition at once after a car stop. Do not press an accelerator pedal before an engine stop. At once after ignition switching off oil ceases to move to a shaft of the compressor and some time it will rotate without greasing;
  • Before muffling the engine, let's to it work on single turns some minutes during which speed of rotation of the turbine considerably will decrease;
  • Regularly change oil, the oil filter and an air purifier. Use of old oil will lead to formation of deposits on a shaft of the compressor and to its exit out of operation. Before disconnecting hoses of giving and oil return from the compressor, carefully clear nearby surfaces. The removed components store in tight containers.
  • Concerning removal and installation address also to the Sections Removal and installation of a turbokompressor and the Supercharger of air - installation details.