vacuum advance unit
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advance unit — See vacuum advance unit … Dictionary of automotive terms
ported vacuum advance — (PVA) A series of restriction devices between the distributor advance unit and the carburetor advance port to ensure that there is no vacuum advance during idle, but increasing ignition advance as the throttle opens … Dictionary of automotive terms
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
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
Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner … Wikipedia
Distributor — This article is about the engine component. For other uses, see Distributor (disambiguation). Typical distributor with distributor cap Also visible are mounting/drive shaft (bottom), vacuum advance unit (right) and capacitor (centre) A… … Wikipedia
spark delay valve — (SDV) a valve in the vacuum advance hose that delays the vacuum to the vacuum advance unit during rapid acceleration from idle or from speeds below 15 mph, and cuts off spark advance immediately on deceleration. Has an internal sintered orifice… … Dictionary of automotive terms
conventional ignition system — An ignition system consisting of the battery, ignition switch, ballast resistor, ignition coil, distributor, contact breaker points, condenser, centrifugal or vacuum advance unit, spark plugs, and high tension wires … Dictionary of automotive terms
Ignition timing — in an internal combustion engine is the process of setting the time that a spark will occur in the combustion chamber (during the power stroke) relative to piston position and crankshaft angular velocity. Setting the correct ignition timing is… … Wikipedia
Citroën 2CV — Manufacturer Citroën Production 1948–1990 [1] … Wikipedia
