- vacuum retard
- A vacuum control unit for retarding the spark
Dictionary of automotive terms. 2015.
vacuum retard
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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 retard unit — A vacuum control unit for retarding the spark … Dictionary of automotive terms
retard — [1] To set the ignition timing so that a spark occurs later or less degrees before TDC. It involves adjusting the camshaft, distributor spark, or valve operation. In this way, the spark plugs fire or the valves open later in the cycle. [2] The… … Dictionary of automotive terms
retard unit — See vacuum retard unit … 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 bottle — vac′uum bot tle n. phs a bottle or flask having a double wall enclosing a vacuum to retard heat transfer; thermos • Etymology: 1905–10 … From formal English to slang
VRDV — Acronym for vacuum retard delay valve … 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
electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube … Universalium
food preservation — Any method by which food is protected against spoilage by oxidation, bacteria, molds, and microorganisms. Traditional methods include dehydration, smoking, salting, controlled fermentation (including pickling), and candying; certain spices have… … Universalium
