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Old 19th February 2019, 17:43   #11
Avulon
This is my second home
 
1.8t Tourer

Join Date: Oct 2011
Location: Tanelorn
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Quote:
Originally Posted by SD1too View Post
When you think about it, what's the difference between the "voltage changes" caused by:

1. The ignition being turned on
2. The operation of the starter motor and
3. The alternator commencing charging

and a modern 'smart' battery charger?

Nothing I would suggest.

Simon

Except that the car battery can't provide more than 12.8v and teh alternator (as long as it's working properly) somewhere around 14.4v (Both DC)

A modern battery charger could supply full mains AC in a failure. Even a failing Regulator isn't going to supply more than 80v (and probably dirty DC)


Quote:
Originally Posted by mss View Post
A current surge by itself is not really the problem but reactances within the car can turn it into a voltage spike. This does happen.

Above battery voltage? I'm sorry, but I don't believe that Apart from the alternator there aren't any other large inductors or Capacitors in our Cars. Which you'd need in order to multiply voltage. What do you think happens in the ign switch...?
__________________
Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk)

Where?:
https://en.wikipedia.org/wiki/Tanelorn
Mods/Retrofits:

PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors
To do:
puddle lights; 2 Din cd/nav to fit; boot release button
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