venturi vacuum

venturi vacuum
A vacuum in the venturi of a carburetor which increases with the speed of the airflow passing through it; an exception are VV carburetors

Dictionary of automotive terms. 2015.

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  • venturi vacuum amplifier — (VVA) used with some EGR system so that carburetor venturi vacuum can control EGR valve operation; venturi vacuum is desirable because it is proportional to the airflow through the carburetor …   Dictionary of automotive terms

  • EGR venturi vacuum amplifier — A device that uses a relatively weak venturi vacuum to control a manifold vacuum signal to operate the EGR valve. Contains a check valve and relief valve that open whenever the venturi vacuum signal is equal to or greater than manifold vacuum …   Dictionary of automotive terms

  • Vacuum pump — A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The vacuum pump was invented in 1650 by Otto von Guericke. Types Pumps can be broadly categorized according to three… …   Wikipedia

  • vacuum — An enclosed area in which the air pressure is below that of the surrounding atmospheric pressure. See air valve carburetor constant vacuum manifold vacuum ported vacuum advance pulse vacuum hublock venturi vacuum …   Dictionary of automotive terms

  • Venturi effect — The Venturi effect is the fluid pressure that results when an incompressible fluid flows through a constricted section of pipe. The Venturi effect may be derived from a combination of Bernoulli s principle and the equation of continuity. The… …   Wikipedia

  • Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner …   Wikipedia

  • Vacuum brake — The vacuum brake is a braking system used on trains. It was first introduced in the mid 1860s and a variant, the automatic vacuum brake system became almost universal in British train equipment, and in those countries influenced by British… …   Wikipedia

  • Vacuum switch — Prior to effective engine computers, engine vacuum was used for many functions in an automobile. Vacuum switches were employed to regulate this flow, and were commonly controlled by temperature, solenoids, mechanically, or directly. They operated …   Wikipedia

  • venturi — That part of a tube, channel, pipe, etc., so tapered as to form a smaller or constricted area. A liquid, or a gas, moving through this constricted area will speed up and as it passes the narrowest point, a partial vacuum will be formed. The taper …   Dictionary of automotive terms

  • Manifold vacuum — Not to be confused with Vacuum manifold. Manifold vacuum, or engine vacuum in an internal combustion engine is the difference in air pressure between the engine s intake manifold and Earth s atmosphere. Manifold vacuum is an effect of a piston s… …   Wikipedia

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