- vacuum retard delay valve
- (VRDV) delays a decrease in vacuum at the distributor vacuum advance unit when the source vacuum decreases. Used to delay release of vacuum from a diaphragm -- a momentary vacuum trap
Dictionary of automotive terms. 2015.
vacuum retard delay valve
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vacuum delay valve — (VDV) a valve used by GM to bleed ported vacuum to the vacuum advance unit through a small orifice and control vacuum advance rate. Used to retard or delay the application of a vacuum signal. Also called delay valve … Dictionary of automotive terms
VRDV — Acronym for vacuum retard delay valve … Dictionary of automotive terms
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