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- Path: sparky!uunet!caen!rphroy!link.ph.gmr.com!vbreault
- From: vbreault@rinhp750.gmr.com (Val Breault)
- Newsgroups: rec.autos.tech
- Subject: Re: starter Solenoid current requirements? Help please.
- Message-ID: <VBREAULT.92Aug20160814@rinhp750.gmr.com>
- Date: 20 Aug 92 20:08:14 GMT
- References: <6008@pdxgate.UUCP>
- Sender: news@rphroy.ph.gmr.com
- Organization: General Motors Research Labs
- Lines: 27
- Nntp-Posting-Host: rinhp750.gmr.com
- In-reply-to: kevins@eecs.cs.pdx.edu's message of 20 Aug 92 05:01:57 GMT
-
- In article <6008@pdxgate.UUCP> kevins@eecs.cs.pdx.edu (Kevin Stanton) writes:
-
- I'm trying to figure out how much current a starter solenoid draws in
- general. On my 85 Cutlass Ciera, my ammeter shows about 10 amps through
- the 12 gauge wire, but is there a spike before that? I've heard something
- about pull-in and hold windings in the solenoids... Or, do most new cars
- have solenoid relays?
-
- I think you're in the right ballpark for current Kevin. As far as I know
- there are no cars with pick and hold windings. The starting event is
- supposed to be brief. The additional complexity of hold windings would
- not yield any real world benefits. Since the solenoid is an inductor
- the current should rise to it's maximum without any spikes. However,
- there could be some spikes when the current is removed and the magnetic
- field collapses. If you're contemplating a solid state switch then you'd
- be wise to put a hefty diode across the coil to protect the switch.
-
- -val-
-
- --
-
- Val Breault - vbreault@gmr.com - N8OEF/AE
- General Motors Research and Environmental Staff.
- The opinions expressed by the author do not necessarily reflect
- those of the GMRES or the General Motors Corporation.
-
-
-