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 catalytic the converter
Security measures for an exception of damages catalytic 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
+ Onboard electric equipment
+ Electric equipment schemes
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Work catalytic the converterThe Katalitichesky converter
All engines are equipped one or several каталитическими 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 catalytic of the converter.
To reduce with the help catalytic 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 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 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 - 800°С. For this purpose it is necessary большее the fuel maintenance in a mix, than for pure burning.