- VOC
- Acronym for Volatile organic compounds
- VOF
- Acronym for Volatile Organic Fraction
- Voice alert system
- A system in a car which audibly announces warning messages to the driver, e.g., Warning! Oil pressure too low
- Voice recognition
- The ability of a computer to recognize a command spoken by the user; enables a driver to use a car phone without using his hands
- Voisin
- A vehicle brand of which the 1925-1948 models are classic cars.
- Voiture Legere
- A light car, especially a racing car falling between the heavy cars and the voiturette. Term seldom used to describe production cars. Not used after 1914.
- Voiturette
- Early two-seater Touring car. Name first used by Leon Bollee and then applied to any small car.
- Volatile
-
- Easily evaporated.
- A volatile substance is one that is capable of being evaporated or changed to a vapor at a relatively low temperature. Volatile substances also can be partially removed by air stripping.
- Volatile matter
- Those products, exclusive of moisture, given off by a material as gas or vapor. Volatile matter is determined by heating the coal to 950°C under carefully controlled conditions and measuring the weight loss, excluding weight of moisture driven off at 105°C.
- Volatile organic compounds
- (VOC)
- Unburned hydrocarbon (HC) portions of gasoline
- Reactive gases released during combustion or evaporation of fuel and regulated by EPA. VOCs react with NOx in the presence of sunlight and form ozone.
- Volatile Organic Fraction
- (VOF) The organic fraction of diesel particulate matter as determined by vacuum evaporation. It may or may not be equivalent to the SOF fraction. Depending on the exact analytical procedure, the VOF may include the organic material (SOF) as well as some of the sulfate particulates which, being composed primarily of hydrated sulfuric acid, are also volatile.
- Volatility
-
- The property of Gasoline, Alcohol, etc., to evaporate quickly and at relatively low temperatures. For instance, Gasoline is more Volatile (has higher volatility) than Kerosene because it evaporates at a lower temperature. Low volatility refers to low RVP, indicating less light hydrocarbons in the gasoline front end. Southern California summer grade gasolines have low volatility. Winter grade gasolines in Michigan are high volatility, or high RVP to make the engine easier to start in sub-zero temperatures.
- The tendency of a liquid to pass into the vapor state at a given temperature. With automotive fuels, volatility is determined by measuring RVP.
- Volkswagen
-
(VW) A German car manufacturer. Includes Cabrio (1995-2002), Cabriolet (1979-93), Corrado (1990-94), Eos (2007), Eurovan (1993-2003), Fox (1988-93), Golf (1988-2006), Golf III (1993-95), GTI (1988-current), Jetta (1988-current), Jetta III (1993-95), New Beetle (1998-current), New Cabrio (1999), New Golf (1999), New GTI (1999), New Jetta (1999,2005), New Passat (2001), Passat (1990-current), Phaeton (2004-06), Quantum (1988), R32 (2004), Rabbit (2006-07), Scirocco (1988), Touareg (2004-07), and Vanagon (1988-91)
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- Volt
- (V)
- A unit of electrical pressure or force that will move a Current of one Ampere through a Resistance of one ohm.
- The volt is the International System of Units (SI) measure of electric potential or electromotive force. A potential of one volt appears across a resistance of one ohm when a current of one ampere flows through that resistance. Reduced to SI base units, 1 V = 1 kg times m2 times s-3 times A-1 (kilogram meter squared per second cubed per ampere).
- Voltage
-
- A difference in electrical Potential between one end of a circuit and the other. Also called electromotive force (EMF). Voltage causes Current to flow. Measured in volts.
- Term used to indicate the electrical potential or electromotive force in an electrical circuit
- Voltage or electrical pressure which causes current to flow.
- Electromotive force.
Also see- Back-voltage
- Balanced Voltage
- Battery Positive Voltage
- Breakdown Voltage
- Electromotive Force Voltage
- Ignition voltage
- Induce a voltage
- Line Voltage
- Open Circuit Voltage
- Output Voltage
- Peak Inverse Voltage
- Rated voltage
- Reference Voltage
- Required ignition voltage
- Spark voltage
- Static Voltage
- Supply Voltage
- Terminal voltage
- VB Voltage
- VF Voltage
- Voltage drop
-
- The lowering of Voltage due to excess length of wire, undersize wire, etc.
- Loss of voltage encountered across a circuit impedance. Voltage drop across a resistor takes the form of heat released into the air at the point of resistance.
- Voltage reduction
- Any intentional reduction of system voltage by 3 percent or greater for reasons of maintaining the continuity of service of the bulk electric power supply system.
- Voltage regulator
- A device which maintains the correct Voltage level in a vehicle's Electrical system by preventing the circuit voltage from exceeding a predetermined safe value. When the Battery needs charging the regulator cuts Resistance out of the Generator Field circuit, thus increasing the flow of Current in that circuit, with the further result that output is increased. When the battery becomes fully charged, the resistance is cut back into the field circuit so that the charging rate is decreased. As the engine speed increases, the Alternator increases and generates more voltage. Unchecked, the alternator might put out so much voltage that Bulbs and other electrical Components might burn out. To a certain extent, the Battery acts as a voltage regulator, but it too can be damaged by an Electrical system which does not have an operating voltage regulator.
- Voltage tester
- A screwdriver for testing electrical current, with an insulated blade and handle; a bulb inside the handle lights up if the blade touches a live terminal
- Voltage transformer
- An assembly for increasing the voltage supplied to the air bag system to 12 volts in case of a drop in
battery voltage
Also see
- Voltmeter
- An instrument used to measure the Voltage in a given circuit, in volts.
Also see
- Volume
- The measurement, in cubic inches, cubic feet, liters, etc., of the amount of space within a certain object or area.
- Volume control screw
- An adjusting screw which controls the amount of air/fuel mixture supplied by the idling circuit of a fixed-jet carburetor
- Volumetric efficiency
-
- A comparison between the actual Volume of fuel mixture drawn in on the Intake stroke and what would be drawn in if the Cylinder were to be completely filled. In practice, a normally aspirated car engine does not take in an amount of an equal to the displacement, it passes only about 80% of the theoretical charge i.e., volumetric efficiency is 80%; this can be increased by supercharging.
- Term used to express the relationship between the actual performance of a compressor or of a vacuum pump and calculated performance of the pump based on its displacement.
Also see
- Voluntary Export Restraint
- (VER) In relation to Japanese manufacturers exporting to Canada (no longer in effect).
- Voluntary Restraint Agreement
- In relation to Japanese manufacturers exporting to the United States (no longer in effect).
- Volute
- A spiral-shaped case in which an Impeller forces liquid in the direction it should go. Often used in Pumps.
Also see
- Volute casing
- A progressively expanding pump casing proportioned to reduce the liquid velocity gradually so that some of the velocity energy of the liquid is converted into static pressure
- Volvo
-
A model of automobile manufactured in Sweden. A vehicle brand of which the 1961-67 P.1800S, 2-door Coupe models are milestone cars. Includes 240 (1988-93), 740 (1988-92), 760 (1988-90), 780 (1988-90), 850 (1993-97), 940 (1991-95), 960 (1992-97), C30 (current), C70 (1998-current), Coupe (1991), S40 (2000-current), S60 (2001-current), S70 (1998-2000), S80 (1999-current), S90 (1997-98), V40 (2000-04), V50 (2005-current), V70 (1998-current), V90 (1997-98), XC70 (2003-current), and XC90 (2003-07)
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- Vortex flow
- The whirling motion of the oil in a Torque converter as it moves around and around from the Pump, through the Turbine, through the Stator and back into the pump and so on.
- Vortex tube
- Mechanism for cooling or refrigerating which accomplishes cooling effect by releasing compressed air through a specially designed tube,.
- Vortex tube refrigeration
- Refrigerating or cooling device using principle of vortex tube, as in mining suits.