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Mercedes S-class W2021993-2000 of releaseRepair and car operation |
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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 900°C, and later 30 seconds the maximum temperature reaches 1180°C. 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
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