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
      Principle of work of the diesel engine
      Work of system of injection
      The device of heating of the fuel filter
      Removal and installation of atomizers
   + System of release of the fulfilled gases
+ Engine electric equipment
+ РКПП and трансмиссионная a line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electric equipment schemes





Work of system of injection

In ТНВД pressure of injection of fuel which through топливопроводы a high pressure and an atomizer is injected into combustion chambers is created.

Air necessary for combustion of fuel, is sucked in through the air filter and compressed турбокомпрессором, address to Razdelu Turbokompressor.

The monitor the engine estimates signals of various gauges, counts quantity of injected fuel and the moment of injection on the basis of the received information and transfers corresponding commands to executive powers. Thus there is a coordination of a monitor with other systems of the car, for example, to a control system of transmission, the conditioner or car blocking.

The gauge of position of a pedal is located on a support of a pedal of gas. By means of a potentiometer to a monitor the engine informs the information on pedal position. The trosovyj drive of gas to ТНВД is not used, therefore there is a term “an electronic pedal of gas”.

The measuring instrument of weight of air with the built in gauge of temperature of soaked up air measures quantity of soaked up air.

The pulse gauge of a cranked shaft measures number of turns of the engine.

The gauge of moving of a needle of an atomizer on one of atomizers defines the beginning of injection and regulates process of injection depending on loading and number of turns of the engine.

The pressure gauge наддуваемого air measures pressure of air in the inlet pipeline. Its signals serve for restriction of quantity of injected fuel if adjustment of pressure of pressurisation or a measuring instrument of quantity of air fail.

The system рециркуляции fulfilled gases AGR depending on a working condition of the engine brings in soaking up path of the engine through the operated valve certain quantity of the fulfilled gas. Thus, the temperature of combustion of fuel decreases. The more low this temperature, the more low concentration of poisonous substances in the fulfilled gases.

The switch of a pedal of coupling serves for an exception of the blows arising at change of a mode and jerks at inclusion of coupling.

The switch of a pedal of a brake
serves for dump of number of turns of the engine to single if the gauge of position of a pedal of gas has failed also the driver the car brakes.

Owing to good starting characteristics of the engine with direct injection preliminary heat is required basically at temperatures more low 0С. Candles накаливания join from a monitor through the relay.