Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
- 8. Fuel system
   + 8.1.1. Introduction
   + 8.2. System of injection of petrol engines
   + 8.3. System of injection and a food of diesel engines
   - 8.4. System of release of the fulfilled gases
      8.4.2. The basic and average mufflers
      8.4.3. Cars with the catalyst
      8.4.4. The device of neutralisation of the fulfilled gases of the diesel car
      8.4.5. Three in one – or how to save the catalyst
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

8.4.4. The device of neutralisation of the fulfilled gases of the diesel car

Diesel engines of the S-class are serially equipped with the catalyst and system рециркуляции the fulfilled gases. The catalyst is located in system of release of the fulfilled gases in the forward final pipeline instead of the additional muffler.

The case of the catalyst (1), and also tubular joinings are made of a high-quality steel. The layer of precious metal put on the catalyst promotes additional oxidation of the fulfilled gases. The monolith sensitive to pushes (3) is fixed by means of a metal fabric (2).

In the diesel engine the so-called oxidising catalyst is applied. On this catalyst there is an oxidation моноокиси carbon (WITH) and hydrocarbons (NANOSECOND) to water (Н2О) and carbon dioxides (СО2), harmless to environment.

At рециркуляции the fulfilled gases their part again gets back to the combustion chamber. By means of it the combustion temperature that conducts to smaller formation окиси nitrogen (NОx) decreases.