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
      Principle of operation of the diesel engine
      Work of system of injection
      Device of heating of the fuel filter
      Removal and installation of nozzles
   + System of production of the fulfilled gases
+ 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


Work of system of injection

In TNVD pressure of injection of fuel which through топливопроводы a high pressure and a nozzle is injected into combustion chambers is created.

The air necessary for combustion of fuel, is sucked in via the air filter and compressed by a turbokompressor, address to the Section Turbokompressor.

The monitor the engine estimates signals of various sensors, counts amount of injected fuel and the moment of injection on the basis of received information and transfers the corresponding teams to executive bodies. 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 sensor of provision of a pedal is located on a support of a pedal of gas. By means of a potentiometer to a monitor the engine reports information on the provision of a pedal. The Trosovy drive of gas to TNVD is not used, therefore there is a term “an electronic pedal of gas”.

The measuring instrument of weight of air with the built-in sensor of temperature of soaked-up air measures amount of soaked-up air.

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

The sensor of moving of a needle of a nozzle on one of nozzles defines the beginning of injection and regulates injection process depending on loading and number of turns of the engine.

The sensor of pressure of nadduvayemy air measures pressure of air in the inlet pipeline. Its signals serve for restriction of amount of injected fuel if adjustment of pressure of pressurization or a measuring instrument of amount of air fail.

The system of a retsirkulyatsiya of the fulfilled AGR gases depending on a working condition of the engine brings to soaking-up highway of the engine via the operated valve a certain amount of the fulfilled gas. Thus, the temperature of combustion of fuel decreases. The this temperature is lower, the concentration of poisonous substances in the fulfilled gases is lower.

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

The switch of a pedal of a brake
serves for dumping of number of turns of the engine to single if the sensor of provision of a pedal of gas failed and the driver brakes the car.

Owing to good starting characteristics of the engine with direct injection preliminary heat is required generally at temperatures below 0°С. Glow plugs join from a monitor via the relay.