Vocab Flashcards
ABS
Antilock brake system
Electronically monitors wheel speed and prevents wheels from locking up by rapidly cycling brakes during hard stopping or slippery surfaces
Actuator
Device delivers mechanical action to a vacuum or electrical signal
aeration
the process of air mixing with liquid
SRS
Safety Restraint System includes air bags and seat belts
Air Gap
gap between spark plug electrodes
air-fuel ratio
the proportion of air to fuel by weight in fuel mixture drawn into motor
air lock
a bubble of air trapped in a fluid circuit that interferes with normal operation
alignment
adjustment to bring into line
AWD
All Wheel Drive method of providing traction to any wheel on a vehicle, depending on system may be part or full time
ambient temperature
temperature of air around an object
ammeter
tool to measure electrical current flow in a circuit
amp
unit of measument for electrical current
arcing
electrical energy jumping across a gap
automatic locking hubs
4 wheel drive hubs that can engage and disengage themselves
atomization
breaking a fluid down to a fine mist lighter than air
axial
being parallel to the axis of rotation
axial load
load placed on bearing that is parallel to axis of the rotating axle shaft
backfire
combustion of gases in intake or exhaust manifold resulting in a loud bang
backing plate
component which brake shoes and wheel cylinder are attached to
backpressure
pressure created by restriction in exshaust system
ballast resistor
resistor in primary ignition system which reduces voltage by 4-5 volts
ball bearing
an antifriction bearing that uses steel ball held between inner and outer races
ball joint
suspension component thar provides a pivot point allowing the steering knuckle to move up and down and turn in response to steering input
barometric pressure
pressure of the atmosphere
battery
device that produces electricity by electrochemical action
battery acid
sulfuric acid solution used as the electrolyte in a battery
bearing clearance
amount of space between shaft and bearing for lubricating oil to enter
blowby
unburned fuel from combustion that leaks past piston rings and into crankcase as last part of combustion stroke
boot
rubber cover over cv axles or rack and pinion assembly to contain lubricant and keep dirt out
brake bleeding
purging air from hydralic brake system
brake drum
cast iron housing brake shoes press against when braking
camber
when viewed from the front the distance between the top and bottom of the tires are different
castellation
slots cut in a bolt head or nut which a cotter pin can be used
caster
Caster is the angle that identifies the forward or backward slope of a line that is drawn through the upper and lower steering pivot points
catalytic convertor
emmisons control device that reduce hydocarbons, carbonmonoxide and nitogen oxidies in exshaust gases
center link
steering linkage that attaches pitman arm to idler arm or tie rod ends together.
center support bearing
bearing with a rubber insulator that supports the driveshaft
check valve
a gate or valve that allows one way flow of gas or fluid
circuit
path which electricity flows before returning to its source
circuit breaker
heat sensitive spring that breaks contact in an overload condition, automotive circuit breakers reset themselves
closed loop
electronic feedback system in which sensors provide constant information on the state of the engine
