Mercedes S-Class
+ Mercedes Benz cars of the class S (W-140)
+ operation manual
+ Routine maintenance
+ motor
+ cooling systems, heating
+ Systems of power supply and edition
- Electric equipment of the motor
- Systems of ignition and management of the motor - the general information
Checks of tax system ignition and injections
Search of defects - the general information and preliminary checks
Check and regulation of a corner of Zuvorkommens of ignition
Spark plugs
Self-diagnostics of control systems of the pipe OBD
Diagnostics of electronic system of the automatic conditioner of air (kilowatt)
Application of an oscillograph for observation of signals of tax system
Ignition coils - a device detail
Removal, device and regulation of a sensor of provision of a wave of curve (CMP)
The distributor of ignition (M119.97 motors) - a device detail
+ systems of freight and start
+ gear shifting boxes
+ Awtomatitscheckaja transmission
+ connection
+ brake system
+ Aufhängung and management
+ body
+ electric onboard equipment
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Spark plugs
General description The spark plug exists from the central electrode, the insulator a body and an electrode (ow) of weight. Between the central electrode and an electrode of weight the spark which lights fuel air mix runs. It needs be not to used a spark plug excellent recommended. The recommended type of candles clears up including from heat cost.
The cost of heat characterizes a step of thermal loading of a candle. Sometime it is the cost of heat of a candle, than the step of its thermal loading is higher than subjects below. At the same time the candle takes away heat better thanks to whom the possibility of filament ignition of mix of fuel is excluded. The candle with the high thermal characteristic has that shortcoming that its temperature of self-cleaning lies above. It - to education formation of soot, including then more inclined when the motor does not reach working temperature, for example, of the movement in the city, short shifts in the winter often in working hours.
The correct cost of heat of a candle clears up from the producer of the car. It gives candles with or to several electrodes of weight, with various length of the work of a slice and its diameter. At compensation of a candle it is necessary to establish only candles, correspond to arrangements of the producer of the car.
The average term of a candle is excellent. At the same time the serious role plays also material of electrodes. Chrom-nikelewyj alloy is characterized very highly teploprowodnostju and high resistance of corrosion. Most teplootwodom silver has, and platinum electrodes have high resistance of corrosion and firmness against a candle end. The term of candles lies between 20 000 and 100 000 km of the movement, depending on material of electrodes and its number.
Depending on a design of motors 2 types of a condensation do distinction between spark plugs and the head of cylinders.
The low condensation externally has uplotnitelnoje a ring which is not lost and it is strengthened on a candle body. At konusnom the condensation in addition is not required this uplotnitelnych of elements. At the limited room for the device, candles with low Setzoberfläche and small volume are used ready mostly. Candles with conic Setzoberfläche thanks to a compact design have smaller volumes.
Spark plugs follow each 60 000 km of the movement (to change watch chapter Routine maintenance).
After a type of a candle it is possible to pull the conclusion about work of candles, management of quality of mix and a condition of the motor (pistons, piston rings, etc.)
Coalfields
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Symptoms: availability of soot designates on pereobogaschtschenije of air mix of fuel or weak intensity of a spark. Causes admissions of ignition, complicates start and results in instability of operation of the motor.
Recommendations: whether the agreed provereniye you is the filter for purification of air whether fuel level in camera poplawkowoj not too is high, whether it is jammed because of vozdushno saslonka contacts are too worn-out much. Try to use candles with longer insulator that increases stability of pollution.
Samasliwanije |
Samasliwanije
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Symptoms: samasliwanije of a candle is noted from sale of maslootraschatelnych kolpatschkow. Oil gets to the burning camera worn-out directing to gates or piston rings. Causes admissions of ignition, complicates start and results in instability of operation of the motor.
Recommendations: perform mechanical works of restoration and replace candles. |
Normal state of a candle
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Symptoms: gray coffee with milk color and easy sale of electrodes. The cost of heat of candles corresponds to type of the motor and its general state.
Recommendations: At compensation of candles you establish candles of the same type. |
Peploobrasowanije
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Symptoms: Be softened to brownish color of adjournment on one or several electrodes of a candle. A source of its education is the used addition to und\oder oil combustible. The increased accumulation can lead to isolation of electrodes and which are caused by admissions of ignition and unstable operation of the motor at acceleration.
Recommendations: At bystry accumulation of deposits you change maslootraschatelnyje kolpatschki that will prevent an oil meeting in burning cameras. Try to replace fuel brand. |
Overheat
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Symptoms: porous, white insulator, erosion of electrodes and lack of some deposits. Leads to reduction of term of a candle.
Recommendations: whether it be the provereniye you the cost of heat of certain candles conforms to requirements of specifications, it is correct whether the corner of Zuvorkommens of ignition is exposed, whether too poor air mix of fuel is served, whether is available whether it be a vytecheniye of vacuum of the pipeline of access gates are jammed. Whether it be you check also sakuporen refrigerator level the heater. |
Sale
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Symptoms: rounding of electrodes with small accumulation of deposits on the working end. Color normally. Results in difficulty of start of the motor in cold damp weather and increases in costs of fuel.
Recommendations: Change candles on in a new way, same type. |
Too early ignition
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Symptoms: oplawleny. The insulator has white color, but can be and became soiled owing to documents of ignition or a meeting in cameras of burning of minor particles. Can lead to a motor exit except the enterprise.
Recommendations: Check the cost of heat of certain candles, a corner of Zuvorkommens of ignition which quality of mix (whether is) whether sakuporena the cooling system not too of abgereichert and whether it be the Schmierens system normally functions. |
Explosion
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Symptoms: the insulator there can be skolotymi or tresnutymi. Chaotic technology of regulation of freedom of action of candles can also lead to damage of the insulator. If the piston can lead to damage. |
Sabrysgiwanije
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Symptoms: After documents of ignition during the long period of adjournment can be loosened at preservation of working temperature in the burning camera. At high speeds of adjournment with snowflakes break from the piston and nalipajut on the hot isolation center, causing admissions of ignition.
Recommendations: replace candles or you clean and establish to the place of old men. |
Electroconductive gloss
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Symptoms: the insulator has yellowish color and the polished look. Speaks about sudden temperature increase in burning cameras at strong acceleration. Usual deposits at this oplawljajutsja, a look varnish providing getting. Leads to documents of ignition at high speeds of the movement.
Recommendations: replace candles (more cold, at preservation of a manner of a trip). |
Mechanical damages
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Symptoms: Can be caused by a meeting of minor materials in the camera of burning or arise at blow of the piston about too long candle. Lead to refusal of functioning of the cylinder and to damage of the piston.
Recommendations: remove minor particles of und\oder from the motor you replace |
End of electrodes
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Symptoms: garbage of products of combustion gets to an interpomeshcheniye of electrodes. Firm deposits collect, obrasuja the Supreme threshold between electrodes. Leads to refusal of ignition in the cylinder.
Recommendations: remove deposits from an interpomeshcheniye of electrodes. |
At wwintschiwanii of candles you follow that they were not peretjanuty as uplotnitelnaja glass can be damaged. You do not pass the train moment specified in specifications. |
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