Mercedes C-Class

W203 since 2000 of release

Repair and car operation

Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
- Power supply system and release
   + Power supply system of the petrol and diesel engine
   + System of injection of fuel of the petrol engine
   + System of injection of fuel of the diesel engine. Turbokompressor
   - Systems of release and decrease in toxicity of the fulfilled gases. Turbokompressor
      System of production of the fulfilled gases - general information
      Removal, installation of system of release and tightness check
      Systems of decrease in toxicity of release - the general information
      Catalytic converter
      Turbokompressor - the general information, removal and installation
      The compressor of blown air with a belt drive
      Interkuler - the general information
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Turbokompressor - the general information, removal and installation

On some petrol models the compressor of forced air with a belt drive can be established. It is considered in the Section the Compressor of blown air with a belt drive.

General information

On a turbokompressor shaft in two separate cases two driving wheels are located. The drive of turbine wheels is carried out from the fulfilled gases. They provide rotation of a shaft of a turbokompressor and by that both turbine wheels with speed of 300 000 rpm. Greasing of a turbokompressor is carried out from system of greasing of the engine.

Owing to good filling of cylinders with forced air engine capacity increases to 100 %.

Turbokompressor is intended for increase in engine capacity (to 100 %) by increase of pressure of air in the inlet pipeline. Air not simply arrives in cylinders, and moves in them under pressure. Along with capacity pressurization creates increase in a torque of the engine. Capacity growth, among other things, depends on pressure of forced air which as a rule, makes 1.0 atm. Pressure of forced air is constantly supervised and regulated by the control unit the engine. It excludes possibility of excess of pressure over the established value. According to increase in supply of air, TNVD increases supply of fuel.

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 interkuler (address to the Section Removal and installation of a measuring instrument of weight of air) 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.

In comparison with the petrol engine the diesel engine has no need to reduce extent of compression because of pressurization that provides even in the bottom range of numbers of turns complete use of injected fuel.

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

Turbokompressor represents the precision mechanism. Therefore at emergence of malfunction it should be completely replaced.

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 any a component 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 compressor shaft, 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.