Glossary “power supply” Definition:
Defined unit that is the source of electrical power for a device, circuit, subsystem or system.

Glossary “power take off (PTO)” Definition:
Output shaft found on some four-wheel drive vehicles for driving an external accessory, such as a winch or hydraulic pump.

Glossary “power tools” Definition:
Tools that use compressed air (pneumatics), electricity, or hydraulic pressure to generate and multiply the force required to accomplish the work.

Glossary “power valve” Definition:
Valve in the carburetor that opens during heavy acceleration, to increase fuel flow.

Glossary “power stroke” Definition:
The piston stroke, with both valves closed, in which combustion takes place, forcing the piston from TDC to BDC.

Glossary “power piston” Definition:
Component acted on by pressurized fluid to assist wheel turning on integral or linkage type power steering systems.

Glossary “power plant” Definition:
An engine.

Glossary “power servo” Definition:
Servo unit used in ATC which is operated by a vacuum or an electric signal.

Glossary “power stroke” Definition:
See combustion stroke.

Glossary “power formula” Definition:
Used to calculate the amount of electrical power a component uses. The formula is P = I x E, whereas P stands for Power in Watts, I stands for Current, and E stands for Voltage

Glossary “power hop” Definition:
Tendency of an axle housing to rotate slightly with the wheels then snap back during hard acceleration.

Glossary “power mirror” Definition:
Outside mirrors, having reversible permanent-magnet motors, that are electrically positioned from the inside of the driver’s compartment.

Glossary “power monitor” Definition:
Used to insure that the modules in the system do not start fueling and create power greater than demand. One module serves as a watchdog for another module.

Glossary “power oversteer” Definition:
Loss of traction of the rear wheels while cornering and accelerating, causing the rear of the vehicle to swing toward the outside of the turn.

Glossary “power flow” Definition:
The flow of power from the input shaft through one or more sets of gears, or through an automatic transmission to the output shaft.

Glossary “power brakes” Definition:
System utilizing energy from the vehicle’s engine to reduce the amount of brake-pedal pressure that must be exerted by the driver to stop the car.

Glossary “power cable” Definition:
Cable used to supply electrical power (current).

Glossary “power control module” Definition:
A module or computer used to control drive the higher current output loads.

Glossary “power cylinder” Definition:
1). A shell containing the power-brake operating parts. 2). Linkage-type steering component attached between the frame and the steering relay rod.

Glossary “power brake” Definition:
In an A/T equipped vehicle, the act of holding the brake pedal firmly while increasing engine rpm and the transmission is in gear.