(V)
(Control Item, inverted delta symbol) are the
products identified on drawings and specifications by engineering as affecting
safety or government regulations world-wide (Ford derived)
VACUUM PLATING
The deposition of metal on base-coated objects by
evaporation of a metal, usually aluminum, under high vacuum. Used to simulate
chrome or other bright finishes in automotive design.
VALANCE PANEL
Sheet metal or plastic panel below the bumpers that
conceals chassis components. (Also referred to as Modesty Panel)
VALLEY VARIABLE INFLATION SYSTEM
Surface between two higher surfaces. ACRS restraint
capability is proportioned according to accident severity.
VARI-RATE SPRING
Spring providing variable effective length through
cam action to suit load.
VAULT
An endwise flip.
V-BRACE
V-shaped reinforcement at ends of frame used as
supports for tow hook or pintle.
VECTOR
A quantity that has both magnitude and direction,
such as force, velocity, acceleration, momentum; represented graphically by an
arrow indicating direction and, by its length, magnitude.
VEHICLE
Every device in, upon, or by which any person or
property is or may be transported or drawn upon a highway, excepting devices
moved by human power used exclusively upon stationary rails or tracks.
VEHICLE ACCELERATION
The vector quantity expressing the acceleration of
a point in the vehicle relative to the earth-fixed axis system (X,Y,Z). The following motion variables are
components of this vector, resolve with respect to the moving vehicle axis
system.
VEHICLE AGGRESSIVENESS
The characteristics of a particular motor vehicle
which determines the degree to which injury is inflicted upon the occupants
with which it collides in a particular crash configuration.
VEHICLE AREA
(A) is the
projected frontal area including tires and underbody parts.
VEHICLE AXIS SYSTEM
(x,y,z)
This system is a right-hand orthogonal axis system fixed in a vehicle
such that with the vehicle moving steadily in a straight line on a level road,
the x-axis is substantially horizontal, points forward. The y-axis points to the driver's right and
the x-axis point downward.
VEHICLE CRASHWORTHINESS
The characteristics of a particular motor vehicle
which determines the degree to which occupant protection is achieved in that
vehicle in a particular collision.
VEHICLE DYNAMICS
The relationship between the forces applied to a
vehicle and the resulting motion.
Vehicle ID
Vehicle Identification. ( Detroit )
VEHICLE IDENTIFICATION NUMBER
(VIN) The number assigned to the vehicle by the
manufacturer primarily for identification and registration purposes.
VEHICLE PACKAGE
Drafting layouts which include provisions for all
engine-transmission combinations, major options and designs for heater/air
conditioning, defrosters, cowl structures, "A" pillar, windshield,
steering column, etc. This provides sufficient information for component design
activities to initiate mechanical prototype designs.
VEHICLE PITCH ANGLE
The angle between the vehicle x-axis and the ground
plane.
VEHICLE RESPONSE
The vehicle motion resulting from some internal or
external input to the vehicle. Response
tests can be sued to determine the stability and control characteristics of a
vehicle.
VEHICLE ROLL ANGLE
The angle between the vehicle y-axis and the ground
plane.
VEHICLE ROLL GRADIENT
The rate of change in vehicle roll angle with
respect to change in steady-state lateral acceleration on a level road at a
given trim and test conditions.
VEHICLE ROLL STIFFNESS
Sum of the separate suspension roll stiffnesses.
Vehicle Speed
The Vehicle Speed Histogram graph depicts the Histogram percentage of the total Trip Time the vehicle speed fell within the given bands. ( Detroit )
Vehicle Speed
Vehicle Speed Limiting prevents additional fuel from limiting being supplied to the engine after the Vehicle Speed has reached a preset limit. ( Detroit )
VEHICLE STOPPING DISTANCE
Vehicle stopping distance is the distance traveled
by the vehicle from the instant the driver starts to apply the brakes until the
vehicle comes to rest.
VEHICLE TYPE
Refers to a series of motor vehicle body types that
have been grouped together because of design similarities.
Vehicle Utilization
Driving Time divided by Trip Calendar Time. ( Detroit )
VEHICLE WHEEL BASE
Vehicle wheel base is the characteristic length
upon which aerodynamic moment coefficients are based.
VELOCITY
Velocity is the rate of change of distance with
respect to time. Velocity is a vector
quantity.
V-ENGINE
Cylinders arranged in V-form.
VENTILATED BOX CAR
Similar to an ordinary box car, but arranged for
ventilation and suitable for the transportation of produce or other food stuffs
not needing refrigeration.
VERTICAL (Bounce)
The translational component of ride vibrations of
the sprung mass in the direction of the vehicle z-axis.
VERTICAL INTEGRATION
In truck design, having a single team design all
components with the complete system in mind.
VIBRATE
To move back and forth unceasingly over the same
path.
VIBRATION (Oscillation), General
Vibration is the variation with time of the
displacement of a body with respect to a specified reference dimension when the
displacement is alternately greater and smaller than the reference.
VIBRATION DAMPENER
A device used to dynamically balance a rotating mass
such as an engine crankshaft.
VISCOSITY
Internal resistance of a fluid to flow.
VISCOUS DAMPING
Damping in which the force opposing the motion is
proportional and opposite in direction to the velocity.
VISIBILITY
1. The state or
fact of being visible 2. The relative
ability to be seen under given conditions of distance, light, atmosphere, etc…
Visual Maintenance Reminder
When any maintenance limit has been approached within a preset percentage, the Check Engine Light will blink six times each time the ignition key is turned from off to on. ( Detroit )
VOLATILITY
Ability of a
liquid to diffuse or vaporize.
VOLT
A nit of
electrical measurement of potential.
VOLTAGE
The electromotive force that causes electrons to
flow. Voltage is the difference between
two opposing charges, such as positive and negative plates of a storage
battery. voltage can be present without
current flow. But current cannot flow
unless voltage is present.
VOLTAGE DROP
The "using up"" of voltage in a
circuit. Voltage drop can be caused by
resistance in the circuit wiring, current consuming devices ( such as lamps,
motors, etc..) and by resistors.
VOLTAGE REGULATOR
A device that controls the voltage output of a
generator
VOLUMETRIC EFFICIENCY
Volume of "free air" entering cylinder divided by intake stroke piston displacement per stroke.
VSG (PTO)
The Variable Speed Governor becomes activated when the engine runs above the Low Speed Governor and the vehicle is not moving. ( Detroit )
VSG Percent Trip
Variable Speed Governor Time divided by Trip Time. ( Detroit )
VSL Percent Trip
Variable Speed Limiting Time divided by Driving Time. ( Detroit )
VSS
Vehicle Speed Sensor. ( Detroit )
References
Detroit Diesel
Caterpillar User's Manual