vapor lock

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vapor lock

A condition in which a pocket of vaporized gasoline forms in the fuel line of an internal-combustion engine, obstructing the normal flow of fuel.

va′por-lock′ v.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

va′por lock`

an obstruction to the flow of fuel to a gasoline engine caused by the formation of bubbles in the fuel.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vapor lock - a stoppage in a pipeline caused by gas bubbles (especially a stoppage that develops in hot weather in an internal-combustion engine when fuel in the gas line boils and forms bubbles that block the flow of gasoline to the carburetor)
blockage, stoppage, occlusion, closure, block, stop - an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
bouchon de vapeur
References in periodicals archive ?
Secondly, the low boil point of methanol leads to high possibility of vapor lock by raising the vapor pressure of methanol-gasoline [12-17].
Maximum RVP is also controlled year round by ASTM standard to prevent hot-weather driveability issues (similar to vapor lock), which can occur year round if a fuel's vapor pressure is too high for ambient conditions.
Vapor Lock: The reason engines don't always restart after a tank is run completely dry is that some fuel system designs may develop a vapor lock in the lines before the switchover to another tank is complete.
High evolution of gases during climb can cause decreased pressure resulting in loss of fuel and, when pumping fuel, gas phase separation can occur leading to vapor lock or cavitation problems.
We've been given theories such as vapor lock and boiling fuel, and advice that included clothespins, but I don't feel comfortable betting my safety on clothespins.
To prevent vapor lock in engines taken to high altitude, the ASTM D-910 spec for avgas calls for vapor pressures between 5.5 and 7.1 PSI.
The filling technology creates a vapor lock with carbon dioxide, stopping oxygen from entering the growler.
But it is also liable to evaporation in hot weather, causing vapor lock, where liquid fuel changes to a gas in the fuel lines, and the evaporation contributes to air pollution.
The 620 hypochlorite pump features off-gassing to prevent vapor lock while maintaining +/- 0.1% accuracy in hypo metering.
Obviously the heat from the exhaust was causing the gasoline to vaporize in the line, causing a vapor lock. The elbow was removed; the silo filling was resumed.
On the other hand, too high the vapor pressure can lead to hot-fuel handling problem (warm start problems, stumbling engine, vapor lock) and increased evaporative hydrocarbon emissions.