E46 series BMW 3

since 1998 of release

Repair and car operation



E46 series BMW 3
+ BMW 3 Cars (Е46)
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
- Power supply systems, injection and release
   Security measures and rules of observance of purity at work with fuel system
   Removal and installation of the sensor of a stock of fuel / fuel pump
   Check of the sensor of a stock of fuel
   + Power supply system of petrol engines
   + System of injection of fuel of the petrol engine
   + Power supply system of diesel engines
   - System of production of the fulfilled gases
      Operation of the catalytic converter
      Security measures for an exception of damages of the catalytic converter
      Turbokompressor
      Removal and installation of system of release
      Check of tightness of system of production of the fulfilled gases
      Removal and installation of the sensor of oxygen
      Removal and installation of a final collector
+ engine Electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes



2d97642e


Turbokompressor

The diesel engine is equipped with a turbokompressor. The turbokompressor has two turbines established on one shaft and placed in two separate cases: the driving turbine working from fulfilled gases, and the delivery turbine compressing air, arriving in the engine. Thus angular speed of rotation of a shaft of turbines reaches 120 000 rpm. Greasing of a turbokompressor is carried out from system of greasing of the engine.

The increase in engine capacity at the expense of a turbo-supercharging reaches 100 %. Along with capacity increase owing to application of a turbokompressor the torque increases also. Capacity growth among other things depends on pressure of nadduvayemy air which at engines of cars makes 0.4 - 0.8 bar. Pressure of air by means of the sensor of pressure is supervised and regulated by an engine monitor. Thus, excess of pressure of air above the admissible is excluded.

Between a turbokompressor and an inlet path of the engine there is a cooler of nadduvayemy air. Cooling of air promotes engine capacity increase as cold air thanks to higher density has higher content of oxygen.

Turbokompressor of the BMW car


The 3rd series has adjustable directing shovels, management with which it is carried out from a monitor by the engine via the electromagnetic valve and a vacuum box. It provides achievement of optimum pressure of air at any number of turns of the engine that in turn provides higher torque and higher engine capacity, in particular, at low numbers of turns.

Contrary to petrol engines at diesel it is not required to reduce extent of compression because of pressurization. Thus, on low turns injected fuel completely is burned.

Turbokompressor represents the mechanism of very high precision. Therefore, as a rule, in case of malfunction the turbokompressor is replaced entirely.