Mercedes M-Class W163

since 1997 release

Repair and operation of the car



Mercedes W163
+ Mercedes-Benz cars of a class M (W163)
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply system and production of the fulfilled gases
- Systems of electric equipment of the engine
   + Systems of ignition and engine management
   - System of preheat of the diesel engine
      Check of candles of an incandescence
      Removal and installation of candles of an incandescence
      Removal and installation of the sensor of temperature of cooling liquid (ECT)
   + Diagnostics of systems of electronic control and diagnostic equipment
   + Systems of a charge and start
+ Manual box of gear shifting
+ Automatic transmission
+ Transmission line
+ Brake and auxiliary systems
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



System of preheat of the diesel engine

For achievement of necessary temperature of ignition of the air-fuel mix compressed in cylinders of the cold engine the system of a preliminary incandescence is used.

The special candle consisting of the case with the heating core, vpressovanny in it, created by two spirals is rolled in the combustion chamber of each of cylinders: heating and adjusting. After giving of tension the heating spiral in a core heats up within several seconds to temperature + 850 °C, at the same time current, passed through a candle reaches 30A. With increase in extent of warming up increases and resistance was filched that promotes decrease in current to value 15 - 25 A. After shutdown of a control lamp of system of an incandescence on the dashboard dies away it is possible to carry out start the engine.

Time spent for a preliminary warming up of cylinders no more than 10 with is also regulated by the special relay and the module of engine management (ECM) through the sensor of temperature of cooling liquid (ECT) obtaining information on the current temperature of the engine. On the basis of the analysis of the obtained data of ECM exercises control of duration of functioning of system of an incandescence and working current of heating.

On diesel engines with direct injection need for a preliminary incandescence arises only at temperatures below 0 °C.