Re: [MV] 24v COIL OHMS TEST - Lisa jeepcj8Qhome.com

From: Lisa (jeepcj8@home.com)
Date: Tue Nov 21 2000 - 05:35:12 PST


This makes sense. This was the maiden voyage of this vehicle, and the age and
quality of the coil were unknown. It drove fine at 35mph on the way over to the
parade, and was fine through the 2.5 miles in first gear at idle. It was when
the parade was done and we were in slow stop-and-go traffic trying to get home
that it began to run rough. It eventually quit completely. The low revs under
load would have put the greatest strain on the coil then? It got hot?
Lisa

> <snip>
> The coil resistance doesn't change, simply that the current is being pulsed,
> in fact as the revs rise the dissipation of the coil goes up.
>
> <anip>The design of the ignition coil (which is actually a transformer) has to
>
> allow it to get hot at lower revs where you have to accept the dwell angle
> is much more than is required and primary current is simply turned into
> heat.
>
> <snip>
> Simply because with the motor stationary you are over-running the coil
> dissipation by 100% typically, the coil has an intended _duty_ cycle.
>
> Richard
> Southampton - England
>
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