> Proof to a heat – spark plugs. Ford Mondeo (since 2000 of release)
Ford Mondeo since 2000
1. Introduction
2. Equipment
3. Care of the car
4. Engines
5. Greasing system
6. Cooling system
7. System of injection of fuel
8. Ignition system
8.1. The ignition coil
8.2. Proof to a heat – spark plugs
8.3. Replacement of spark plugs – after 60 000 kilometres
8.4. Check by means of the universal device – the gauge of frequency of rotation
8.5. By means of the assistant to any problems – check of the gauge of pressure
8.6. Harmonious work – current check in системезажигания
8.7. It is carried out by means of the universal device – resistance measurement on the ignition coil
8.8. Dismantle of the block of ignition
8.9. Heating of the cold diesel engine – the device of a preliminary warming up
8.10. Check of the device of a preliminary warming up
8.11. Check of the relay of a preliminary warming up
8.12. Check of candles накаливания
9. Fuel system
10. Transmission
11. A running gear
12. Brake system
13. The electrotechnical equipment
14. Electroschemes
15. Car salon
16. A body
17. Technical characteristics
18. The help at malfunctions



8.2. Proof to a heat – spark plugs

The problem of spark plugs – to ignite топливовоздушную a mix in the combustion chamber. Thus there are temperatures to 2500С and pressure of combustion to 60 bar. That sparks confidently came off the ends of candles, "rest" of the central electrode is surrounded by a ceramic insulator. The central electrode together with connecting bolts is besides inserted in current-carrying стекломассу which strongly fixes their case of candles and condenses in front of the combustion chamber. As soon as necessary pressure of ignition and an optimum parametrical corner of ignition is reached, they are discharged in the form of categories from the central electrode to lateral electrodes. Categories possess such energy to ignite a fresh fuel mix in the combustion chamber.

Powerful sparks: spark plugs with several lateral electrodes. Not each candle is suitable for Mondeo. Nevertheless candles of eminent manufacturers are equivalent "original". In drawing the multielectrode spark plug with the is superficial-air spark category with four lateral electrodes and a heat-conducting copper central electrode is shown.

1 — Connecting contact,
2 — the Ceramic insulator,
3 — the Case of a candle,
4 — the Sealing ring,

5 — Lateral electrodes,
6 — the Thermal cone of an insulator,
7 — the Central electrode.

Variable – калильное number

That spark plugs reliably worked, they should reach quickly right after engine start-up the temperature of self-cleaning (approximately 400 С). If it is not reached, rather in short term on an insulator cone settle the combustion rests. At full loading the temperature on the ends of spark plugs whenever possible should not exceed 800 С. Otherwise, it is exact, as well as the following stop on autorefuelling, in the engine there will be defects (the burnt through pistons, teases of pistons and so on).

Naturally, working conditions for spark plugs in all engines the different. Only калильное the number defines, whether candles and the power unit will be co-ordinated among themselves. If, for example, you use candles with small калильным number the thermal cone of an insulator strongly heats up. It can lead uncontrollable калильному to ignition that can lead even to engine destruction. On the contrary, if candles with high калильным number they do not reach the demanded temperature of self-cleaning have been chosen – the insulator cone becomes soiled and in due course igniting sparks can to be seen.

Increases automatically – distance between electrodes

Besides correct кадильного candles should have numbers (look the table) also and corresponding distances between electrodes. In new candles it makes, for example, 1,3 millimetres, however in due course it increases: the overlapping high voltage leads to regular removal of metal particles from electrodes. The big distances between electrodes demand and more an ignition high voltage. A consequence: refusal in ignition, the engine can not be started.

Therefore at replacement of spark plugs be necessarily convinced that candles have ordered for yours Mondeo кадильное number, correct distance between electrodes and an appropriate carving.

Original spark plugs for Mondeo

The engine
The specification of spark plugs
Duratec-HE 1,8/2,0-литровый (81, 92, 107 kw)
Motorcraft AGSF 22PPJ
Duratec-VE (125, 151 kw)
Motorcraft AWSF 32F
DuraTorg-DI (66, 85 kw)
Motorcraft EZD 38*
*Свечи накаливания.  

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8.1. The ignition coil
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8.3. Replacement of spark plugs – after 60 000 kilometres