BMW 5 series E39

Since 1996-2001 of release

Repair and car operation

+ Introduction
+ The maintenance instruction
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
- The power supply system and release
   + The power supply system
   + System of injection of the petrol engine
   + The power supply system of the diesel engine
   - System of release of the fulfilled gases
      Work каталитического the converter
      Security measures for cars with каталитическим the converter
      Removal and installation of system of release
      Replacement of the basic muffler
      Removal and installation of the gauge of oxygen
      Check of tightness of system of release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electric equipment schemes
+ System of onboard diagnostics

Work каталитического the converter

All engines are equipped каталитическим by the converter for clearing of the fulfilled 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 (1) means изоляционного the basic layer (2) compensating simultaneously thermal expansions каталитического of the converter.

Petrol engines

The elektronnoupravljaemaja system of injection in a combination to the oxygen gauge allows to dose out precisely quantity of injected fuel that in turn reduces harmful emissions in atmosphere. The oxygen gauge is in a reception pipe before каталитическим 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 result of measurement a 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 in view of constant change of service conditions (the idling, full gas), on the other hand, since. Optimum reburning of fuel in каталитическом the converter occurs only in this case if in final gases gasoline enough contains.

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

Applied каталитический the converter represents so-called three-functional каталитический the converter. It means that thanks to presence of process of regulation oxidation окиси carbon (WITH) and hydrocarbon (NANOSECOND), and also reduction of concentration of oxides of nitrogen (NOx) is carried out. Address to an accompanying illustration.

Diesel engines

Cars with diesel engines also are equipped каталитическим by the converter. However here adjustment of structure of a mix is impossible. The Katalitichesky converter reduces issue harmful to environment окиси carbon and hydrocarbon to value is considerable smaller, than at the petrol engine. Besides, каталитический the converter reduces a characteristic smell for the diesel engine of exhaust gases. Higher concentration of oxides of nitrogen at the diesel engine decreases by means of system рециркуляции the fulfilled gases.