BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

+ 1. The maintenance instruction
+ 2. Maintenance service
+ 3. The engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. A running gear
+ 12. A body
+ 13. An electric equipment
- 14. A good advice
   14.2. Changed numbers
   14.3. Purchase of the old car or a mysterious set of figures and letters
   14.4. Durability of the car
   14.5. About parallelism of bridges of the car and the trailer
   14.6. Preparation of the car for winter
   14.7. A rule 35
   14.8. A choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Occurrence in deposit oil
   14.12. Whether it is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is more likely live, than it is dead …
   14.15. It is not got - a good advice
   14.16. Visit to car-care centre
   14.17. A gear belt for a mechanism drive газораспределения
   14.18. Deterioration of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   14.22. As the conditioner works and what to do, if it has failed
   14.23. The conditioner: not only "pluses", but also "minuses"
   14.24. Rules of service of the conditioner
   14.25. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know at purchase of the air filter
   14.27. An engine overheat
   14.28. That it is necessary to know to the owner of the car with инжекторным the engine
   14.29. The accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. The catalyst
   14.34. Three in one - or how to save the catalyst
   14.35. Пробуксовочка
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. АБС: a natural choice
   14.40. Wheel disks
   14.41. We update wheel disks
   14.42. The scheme of marks of an automobile tyre
   14.43. Metal corrosion
   14.44. An automake-up
   14.45. What creaks?
   14.46. The hatch
   14.47. A safety pillow: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Галогенки"
   14.52. About correct adjustment of headlights
   14.53. The electric motor
   14.54. From change of places "composed" varies nothing?

14.51. "Галогенки"

Principal cause of fast failure галогенных lamps in cars – the big current proceeding through a lamp at the moment of inclusion as resistance of its thread in a cold condition is many times less, than in нагретом.

In this connection it is recommended to limit a starting current by means of the additional resistor included consistently with threads накаливания галогенных of lamps. After lamp inclusion it is resistance it is short-circuited by means of the relay of the pressure established in parallel to a lamp.

Lack of such devices is necessity of use of one or two electromagnetic relays, details insufficiently reliable, especially in the conditions of the car testing vibration. Besides, at the moment of inclusion spasmodic increase of a current, though and to smaller size all the same takes place, than at usual schemes of inclusion of lamps.

Experts develop the contactless device not demanding application of the relay and providing smooth increase of a current in a lamp. The device consists of the additional resistor R1, two diodes VD1 both VD2 and электролитического the condenser With.

At inclusion of a thread of a passing light on a clip 1 the positive potential moves. Thus diode VD1 connects in parallel a thread of a lamp the condenser With, and is consecutive with it – resistor R1.

At inclusion of a thread of a headlight the positive potential moves on a clip 2, and the condenser With headlight threads through diode VD2 are connected in parallel.

At such scheme of connection pressure on lamps EL1 and EL2 accrues smoothly.

Resistance of cold threads of usual automobile lamps of near and far light approximately 10 times less their resistance in нагретом a condition. The constant of time of heating of a thread of a lamp makes 0,0014–0,003 with.

For an exception it is inadmissible the big current in the course of lamp inclusion it is necessary, that speed of increase in resistance of a thread of a lamp was more speeds of increase of pressure. It is reached by installation электролитических condensers in capacity 4000–6000 мкФ, rated voltage 25 Century

If to take advantage of these councils along with increase in service life of lamps the life of the accumulator because of decrease in a starting current and increase in smoothness of its increase will last also.