引用(wenyan @ 7 Jun 2006, 10:36)

死火不会导致大电流通过车电路板,因为你的所有电路都是跟电瓶连接的,电瓶就是一个大的电容,能过滤绝大部分的强电流,所以也不会导致中控门锁出现问题。
I must disagree on that. If any of you have any remote knowledge of basic circuit principle, you would know that battery is very different from capacitor. The model of a battery is normally either an ideal votage source serially connected to a resistor, or an ideal current source connected to a resistor in parallel. There's no capacitor involved. Therefore, a battery exhibits no characteristics of capacitor. In short,
the battery is not a capacitor.In fact the metallic body of your car is more of a capacitor than the battery. But it still can't completely screen out the current surge resulted from engine stalls or start. Electronic devices are especially vulnerable to such current surges. If you have used any in-car power supply for your laptop, you should have been adviced to disconnect it when you start the engine.
Again, as the electronic circuitry and components get more and more sophisticated, the situation has improved a lot. The majority of in-car electronic devices can now withstand repeated engine starts without any damage. However, repeated engine stalls still must be avoid, if only you can persuade your lady from causing it. Well, I admit, I can't.
引用(流云 @ 7 Jun 2006, 11:38)

我曾经听说过电流损坏中控电路板的。这个电流不一定是从电瓶出来的,可有可能是 generator or alternator, jump start的时候经常可以损坏电路板。
You're right. The source of surge in current is not the battery, but alternator.