Mazda 3 since 2003
1. Operation and maintenance of the car
2. Engine
2.1. General description of new engines of the L8, LF and L3 models
2.1.1. Mechanical part of engines
2.1.2. Mechanism of change of phases of gas distribution
2.1.3. Lubrication system
2.1.4. Cooling system
2.1.5. Fuel system
2.1.6. System of production of the fulfilled gases and system of decrease in toxicity
2.1.7. Electric equipment of engines
2.1.7.1. General information
2.1.7.2. System of charging
2.1.7.3. Ignition coil
2.1.7.4. Spark plug
2.1.7.5. Starter
2.2. Mechanical part of engines
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
2.6. The Z6 engine – a mechanical part
2.7. Lubrication system
2.8. Cooling system
2.9. System of an admission
2.10. Fuel system
2.11. System of production of the fulfilled gases and system of decrease in toxicity
2.12. System of ignition
2.13. Control system
2.14. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
 








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2.1.7.4. Spark plug

The iridic spark plug is used. The central electrode has diameter of 0.6 mm and is made of iridium alloy.

Fig. 2.71. Spark plug: 1 – iridium alloy; 2 – platinum tip


Thinner central electrode allowed to reduce electric discharge and to improve characteristics of ignition. what, in turn, allowed to provide steady performance data under all traffic conditions and it is essential to improve fuel profitability (fig. 2.71).

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2.1.7.3. Ignition coil
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2.1.7.5. Starter