Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
- 7. Ignition system
   7.2. Safety precautions at repair of electronic system of ignition
   7.3. Ignition coils
   + 7.4. Spark plugs
   - 7.5. The device of a preliminary warming up of a diesel engine
      + 7.5.1. Check of the device of a preliminary warming up
      7.5.2. Device self-diagnostics
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

7.5. The device of a preliminary warming up of a diesel engine

The device of a preliminary warming up consists of the relay of management of a warming up of candles накаливания, 4/5-rod candles накаливания and a control bulb of a warming up on the panel of devices. In the cold engine only the compression has not enough for fuel ignition, therefore the engine should be разогретым.

Duration of a warming up depends on an ambient temperature and copes by means of the relay of management of a warming up.

At malfunction of candles накаливания or токоподводящего a feeding wire of the relay of management of a warming up disconnect the device накаливания. Candles накаливания are provided with electropressure by means of the parallel scheme.

If the ignition key remains in position of a warming up without engine start-up the safety scheme of the relay of management of a warming up later 20-25 seconds disconnects the device накаливания. For renewal of a warming up the ignition key at first should be established in 0-position.

At device inclusion накаливания through each candle накаливания the current about 30 A.Blagodarja to an adjusting winding consumption of a current by a candle proceeds at temperature increase a candle накаливания is limited till 8-15 protected from an overload.

The rod candle накаливания consists basically of the case with впрессованным a heating core. The heating core in turn consists of included consistently heating and adjusting winding. At pressure giving the heating winding strongly heats up. Already after 9 seconds of time накаливания the temperature of a heating core makes 900C, and later 30 seconds the maximum temperature reaches 1180C.

For improvement of the characteristic of warming up of the engine idling, the further warming up at the working engine depends on temperature of a cooling liquid. Time of repeated warming up at the engine in volume of 2,0 l makes a maximum of 17 seconds. At engines in volume repeated warming up reaches of 2,2/2,5 l till 3 minutes; at refusal of a temperature-sensitive element of the cooling liquid connected with repeated warming up, duration of the last makes 30 seconds.

The maximum time of a prestarting warming up of the engine in volume of 2,2/2,5 l

–30 WITH
16 seconds
–20 WITH
12 seconds
–10 WITH
7 seconds
6–4 seconds