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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 + 8. Fuel system + 9. Transmission + 10. A running gear + 11. A steering + 12. Brake system + 13. A body - 14. An electric equipment 14.1.2. Measuring devices 14.1.3. Technics of measurements 14.1.4. Electric equipment checks 14.1.5. A sound signal 14.1.6. Replacements of safety locks + 14.1.7. The storage battery + 14.1.8. The generator + 14.1.9. A starter 14.1.10. The traction relay + 14.1.11. Illumination system 14.1.12. Devices 14.1.13. The instrument panel 14.1.14. Lamps накаливания on the panel of devices 14.1.15. Light switch 14.1.16. A radio receiver + 14.1.17. The aerial 14.1.18. Dynamics + 14.1.19. Rubber brushes of screen wipers 14.1.20. Jets стеклоомывателя 14.1.21. Washing atomizers of headlights 14.1.22. A screen wiper and its engine 14.1.23. Protect the car 14.1.24. Anticreeping "immunodeficiency" 14.1.25. Why headlights grow dull 14.1.26. "Галогенки" + 14.2. Electroschemes |
14. An electric equipment
14.1.1. Introduction |
| THE GENERAL DATA |
At electric equipment check in engineering specifications the owner of the car faces concepts "pressure, a current strength and resistance".
Pressure is measured in Voltah (V), a current strength – in Amperes () and resistance – in Ohms (R). In the car pressure, as a rule, is meant concept pressure of the storage battery. Thus it is a question of pressure of a direct current about 12 V.Velichina of pressure of the storage battery depending on its degree разряженности and from temperature of external air can make 10–13 Century On the other hand, pressure developed by the generator for an onboard network at average frequency of rotation of a shaft of the engine makes about 14 Century
The concept "current strength" rather seldom meets in the field of a car electrical supply. The current strength is specified, for example, on an underside of safety locks and specifies the maximum current which can proceed without перегорания safety locks and, hence, without rupture of an electric chain. Everywhere, where the current proceeds, it should be shunted by resistance. Resistance, among other, depends on following factors: cross-section section of a wire, a material of a wire, current consumption, etc. If resistance too big there are functional infringements. For example, resistance of wires of a high voltage should not be too high, otherwise force of sparks on spark plugs which ignite топливовоздушную a mix sufficiently decreases and, hence, start the engine.