On Tue, 10 Feb 2009 10:52:07 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article et,
Dave Liquorice wrote:
As the voltage is so high what stress is it putting on the expensive
computers than control almost everything in a D3?

None, I'd hope. It should all be designed with overvoltage in mind. Even a
bog standard voltage regulator found in most electronics can cope with
perhaps 40 volts higher than its output continuously. And those designed
for car use are even more tolerant.

Car electronics need to be designed to cope with a *very* dirty power
source.

They are indeed. "ISO 7637 load dump" in google will turn up a few
references to the transient requirements - circa 90v for half a second
iirc.


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