At 02:36 PM 10/3/2002, Mark Keller wrote: >I hadn't considered a broken helical spring, but a weak helical spring, and >thin oil at high temps and wear could be an issue. The relief valve really shouldn't be entering into the issue at all with a hot engine -- certainly not intermittently. If the spring breaks you'll have no pressure, if it's weak the peak pressure will be low but below that shouldn't make a difference.
>However, I believe I read from David Beierl, that the circuit is designed >with slope sensing, i.e. if a drop or increase is of such a velocity that the >tolerance would be exceeded, then the circuit arms. So the circuit could >easily "jump the Gun" if a slow pressure valve or sudden drop in rpm causes a >quick drop in oil pressure. Not me, and I don't believe it's so. The circuit looks only at rpm (from the tach signal) and the two pressure switches, on NO and the other NC. david -- David Beierl - Providence, RI http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage" '85 GL "Poor Relation" |
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