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General description of the glow plugs
To fuel system also includes glow, whose function is to start heating the air in the cylinders for easy starting. Candles can not be repaired in case of failure are replaced. Check candles on the electrical conductivity can be established only in the state, so it uses special control panel with LED. Check of candles is best left to experts SRT. If a twisted candle soot was found, it is likely a malfunction nozzle. Inaccurate the start of injection also affects the life of the candle. When buying candles always try to trim them by engine type and year of manufacture of the vehicle. Out of spark failure commonly occurs when starting a cold engine. The fuel in the cylinder with a working spark will ignite with a defective spark ignition will occur with delay. Engine roughness and blue exhaust also indicate a problem with the candles. To access the spark, you must first remove a number of parts.
| Fig. 171. The electrical circuit of the preheating of the engine 1 - glow plug relays; 2 - the indicator light in the instrument cluster; 3 - the central switchboard; a, d - relay; b - electronic control unit; c - sensor; G - glow; M - connection with "weight"
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On the electrical circuit in Fig. 171 shows that the pre-heating device consists of a glow plug relay control response time candle and a control lamp in the instrument cluster. When the ignition current through the relay is connected to terminal "15". Relays and energizes the phase terminals "30" through the fuse (80A) on the candle. The voltage applied to the spark, is a minimum of 11.5 V at a current of 30 A, which is set by the regulator is reduced to 8-15 And to prevent burn candles. Within 10 seconds the spark heated about 900 ?� C, 30 seconds filament temperature may rise to 1180 ?� C. The relay controls the work of candles. It is driven on the basis of information from the external temperature sensor. The lower the outdoor temperature, the longer the time the candles. At -30 ?� C it can be, for example, 25 seconds, in the summer is reduced to 2 seconds. When termination of the candles extinguished lamp in the instrument cluster. If the engine when the ignition is started immediately, a safety device shuts off the voltage to the spark. When starting the engine pre-heating is switched on again. This occurs via the terminal "50" starter. The candle can burn off the heat. Candles can be damaged when fault injectors, injection timing wrong or too low pressure injection. In this case, the spark must be removed and replaced. If you are replacing it should again make sure they are appropriate for the engine.
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