BMW 3 series E46

Since 1998 of release

Repair and car operation

The BMW of 3 series Е46
+ Cars BMW 3 (Е46)
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
- Power supply systems, injection and release
   Security measures and rules of observance of cleanliness at work with fuel system
   Removal and installation of the gauge of a stock of fuel / the fuel pump
   Check of the gauge of a stock of fuel
   + The power supply system of petrol engines
   + System of injection of fuel of the petrol engine
   + The power supply system of diesel engines
   - System of release of the fulfilled gases
      Work каталитического the converter
      Security measures for an exception of damages каталитического the converter
      Removal and installation of system of release
      Check of tightness of system of release of the fulfilled gases
      Removal and installation of the gauge of oxygen
      Removal and installation of a final collector
+ Engine electric equipment
+ Manual transmission and transmission a line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electric equipment schemes

Work каталитического the converter

The Katalitichesky converter

1 — the case
2 — consolidation

3 — honeycombs каталитического the converter

All engines are equipped one or several catalyticи by converters for clearing of exhaust gases.

The Katalitichesky converter has the central ceramic part of a cellular design-3 covered with a layer of the carrier. On a carrier layer there are the salts of precious metals operating as converters. The Katalitichesky converter is fixed in the case by-1 means изоляционного the basic layer-2 compensating simultaneously thermal expansions каталитического of the converter.

To reduce with the help каталитического the converter harmful emissions, injection systems should dose out precisely quantity of the injected fuel necessary for combustion. The oxygen gauge is in a reception pipe before catalytic the converter and is washed by a stream of the fulfilled gases. The oxygen gauge represents the electronic gauge measuring the maintenance of oxygen in final gases and representing its kind of fluctuations of pressure. The information from the oxygen gauge is transferred to the block of management of system of injection. The received value allows to regulate structure of an air-petrol mix. On the one hand it is necessary, as service conditions (the idling, full gas), on the other hand, constantly change as optimum reburning of fuel in каталитическом the converter occurs only in this case if in final gases fuel enough contains.

That in каталитическом the converter there was a fuel reburning, it is necessary to have temperature 300 - 800С. For this purpose it is necessary большее the fuel maintenance in a mix, than for pure burning.

Applied каталитические converters of petrol engines represent so-called three-functional devices. In adjustable process of transformation oxidation oxide carbon (WITH) and hydrocarbon (NANOSECOND), and also concentration reduction оксидов nitrogen (NOx) is carried out.