- PL
- Acronym for Parking lock
- PL&PD
- Acronym for Public Liability and Property Damage as a form of basic Car insurance
- Place in service
- A vehicle is placed in service if that vehicle is new to the fleet and has not previously been in service for the fleet. These vehicles can be acquired as additional vehicles (increases the size of the company fleet), or as replacement vehicles to replace vehicles that are being retired from service (does not increase the size of the company fleet).
- Plain Sheared Point
- The end of a metal object cut approximately flat and square to the axis, without chamfer.
- Plain wrapper
- Trucker slang for an unmarked police car as in "Plain wrapper sitting at the 57 taking pictures."
- Planer Head Bolt
- A bolt having a large, low square head, designed for insertion in T-slots of planer, shaper, or milling machine tables.
- Plane sailing
- A method of navigation which ignores the earth's curvature, treating its surface as a plane. Colloquially it indicates travel or procedure without difficulty or obstruction.
- Planetary albedo
- The fraction of incident solar radiation that is reflected by the Earth-atmosphere system and returned to space, mostly by backscatter from clouds in the atmosphere.
- Planetary gear differential
- A planetary gear set used as a differential with asymmetric torque distribution, as used in 4WD vehicles
- Planetary gearset
-
- A Gearing unit consisting of a Ring gear with internal teeth, a sun or central Pinion gear with external teeth, and a series of Planet gears that mesh with both the ring and the Sun gear. Frequently used in Overdrives and Automatic transmission. Also called Epicyclic gearbox.
- A central externally toothed sun gear, an internally toothed outer ring gear, and several intermediate planet gears which are evenly spaced and supported by a planet carrier; they are in constant mesh with the sun gear and the internal gear
- Planetary gear set
- Planetary-gear system
- A gearset used in automatic transmissions that features a central gear, called a sun gear, surrounded by two or more smaller planetary gears that mesh with a ring gear.
- Planetary transmission
- A form of gear used by Benz in which small Pinions revolve around a central or Sun gear and mesh with an outer Ring gear called the annulus. Type used in the Ford Model T. Also called Epicyclic gearbox and "sun-and-planet gears".
- Planet carrier
- That part of a Planetary gearset upon which the Planet gears are affixed. The planet gears are free to turn on hardened pins set into the carrier. The planet carrier revolves around the central axis of a planetary gear set and supports the planet gears
- Planet gears
- Those gears in a Planetary gearset that are in
mesh with both the ring and the Sun gear. They are
referred to as planet gears in that they orbit or move around the central or
Sun gear.
Also see
- Planet spider
- A common type of Planet carrier with a Spider or web-style design
- Planishing
- The final panel hammering stage for lifting out minor imperfections in a panel surface. Part of the panel finishing process
- Planck's constant
- Constant value (6.626 x 10-34 watt seconds squared) which, when multiplied by the frequency of radiation, determines the amount of energy in a photon.
- Planned obsolescence
- A policy of manufacturers that encourages motorists to become dissatisfied with their cars so that they are eager to buy the latest model.
- Plant condensate
- One of the natural gas liquids, mostly Pentanes and heavier hydrocarbons, recovered and separated as liquids at gas inlet separators or scrubbers in processing plants.
- Plant products
- Natural gas liquids recovered from natural gas processing plants (and in some cases from field facilities), including ethane, Propane, Butane, butane-propane mixtures, natural gasoline, plant condensate, and lease condensate.
- Plasma
- Temporary physical condition of a gas after it has been exposed to and has reacted to an electric arc.
- Plasma arc cutters
- Cutting equipment that makes clean, fast cuts without destroying the properties of high-strength steels
- Plasma spray process
- The process in which a very high temperature flame is produced by blowing gas through an electric arc. Metal wire or powder is melted by passage through the flame and is projected on the surface to be coated
- Plastic
- A material that contains as an essential ingredient one or more organic polymeric substances of large molecular weight. It is solid in its finished state and, at some stage in its manufacture or processing into finished articles, can be shaped by flow.
- Plastic deformation
- A permanent change in the shape or size of a solid body without fracture resulting from the application of sustained stress beyond the elastic limit
- Plastic engine
- An automobile engine whose bulk is made of plastic components (e.g., engine block, inlet manifold, water-pump housing, valve covers, oil pan), the use of metal being limited to parts subjected to extreme mechanical or thermal loads (e.g., combustion chamber, exhaust manifold, pistons, cylinder liners, valve train, etc.)
- Plasticize
-
- To soften a material to make it plastic or moldable by heating, kneading, or adding a plasticizer
- To soften an adhesive, coating or sealer, generally by the addition of high boiling liquids or plasticizers
- Plasticizer
-
- An additive that gives flexibility to an otherwise rigid plastic
- A liquid or solid chemical added to a compound to impart softness or flexibility. Some plasticizers have an undesirable tendency to migrate from the parent material into nearby surfaces which are receptive. When they migrate into adhesive films, for instance, they generally cause loss of strength or complete failure of the bond
- Plastic molding
- A process that converts organic-based materials, by means of a general-purpose press and purpose-built Tooling under controlled heat and pressure, and injects the hot material into a die cavity shaped in the final form of the intended part.
- Plastics welding
- A uniting of thermoplastic, i.e., non-setting plastics of similar or different type using heat and pressure and with or without the addition of plastic of a similar kind (filler material). The welding proceeds within the temperature range of thermoplasticity of the contact surfaces on the parts to be welded; the freely mobile molecular chains in the marginal areas flow together and become interlaced
- Plastigage
- A soft plastic that flattens out to predetermined widths when subjected to torque; these widths equal a specific clearance. It is normally used to check main and rod-bearing clearance. It is sold in a paper sleeve that also doubles as the scale on which it is measured (in thousandths of an inch)
- Plastigauge
- A plastic material that compresses to the thickness of the clearance between a crankshaft journal and a bearing when the bearing retaining cap is installed, so the clearance can be checked against specifications
- Plate
-
- The action of Coating a material with some metal. Also called Electroplate or Anodize.
- A flat piece of material often used to mount another device.
- Two lead-alloy plates in each cell of a battery where the positive plate is made of lead peroxide and the negative plate is made of spongy lead. The plates are arranged in groups, in an alternate fashion, called elements. Separators are placed between the plates of different polarity. Plates and separators are completely submerged in the Electrolyte.
- The electrode, in a valve or tube, held at a positive potential with respect to a cathode, and through which positive current generally enters the vacuum or plasma, through collection of electrons.
- Clutch discs
- The electro-chemical coating of a metal piece with a very different metal.
Also see- Adapter plate
- Anchor Plate
- Armature End Plate
- Armor Plate
- Backing plate
- Baffle plate
- Bipolar Plates
- Blanking plate
- Boiler Plate
- Brake backing plate
- Breaker plate
- Buckled Plates
- Catch Plate
- Center drive plate
- Chafing plate
- Clutch plate
- Clutch pressure plate
- Contact breaker plate
- Directional Baffle Plate
- Driven plate
- Drive plate
- End cover plate
- Flitch plate
- Friction plate
- Gusset plate
- Heel plate
- Hinge plate
- Hinge tapping plate
- Hub plate
- Identification Plate
- Intel-plate
- Intermediate drive plate
- Intermediate plate
- Keel, flat plate
- License plate
- License plate frame
- Nave plate
- Negative plate
- Positive plate
- Pressure plate
- Quarter-wave Plate
- Rear license plate lamp
- Rear license plate light
- Restrictor plate
- Retainer plate
- Scuff plate
- Sensor plate
- Separator Plate
- Short Circuit Between The Plates
- Skid plate
- Step plate
- Striker plate
- Support Plate
- Surface Plate
- Swash plate
- Swash Plate-wobble Plate
- Transfer plate
- Valve body separator plate
- Valve plate
- Vanity plate
- Wobble Plate-swash Plate
- Plate group
- An assembly of plates of identical polarity (positive or negative) used in a battery cell
- Plate strap
- The conducting connection between the lugs of battery plates of like polarity and the cell terminal
- Plate support
- The support at the bottom of a battery case on which the elements rest. It provides space for the sediment chamber
- Platform
- Primary load-bearing structural assembly of a motor vehicle determining the basic size of the motor
vehicle, and is the structural base that supports the driveline and links the
Suspension components of the motor vehicle.
Also see
- Platform frame
- The underbody construction consisting of a reinforced and fairly flat section that forms the entire lower portion of a vehicle. It includes the floorpans and is bolted to the body; (e.g., Volkswagen Beetle)
- Platinum
- A precious light-grey, heavy, ductile, noble metal, atomic number 78, atomic weight 195.09; melting point at 1769°C. It is the main member of the so-called platinum metals. Together with other platinum metals, it is used as a catalyst in automotive exhaust converters. It is used in the construction of Breaker points. It conducts electricity well and is highly resistant to burning.
- Platinum electrode
- A spark plug electrode made of platinum which lasts longer than one of nickel alloy because it can better withstand high temperatures
- Platinum metals
- A generic term for a family of noble metals found with and resembling platinum. It includes ruthenium, rhodium, palladium, osmium, iridium, and platinum. They are used as catalysts in catalytic converters. Less than a tenth of a troy ounce is required per converter to produce acres of catalytically active catalyst surface
- Platinum-tipped spark plugs
- Most General Motors vehicles built since 1995 are equipped with platinum-tipped spark plugs. Under normal operating condition, platinum-tipped spark plugs are designed to function up to 166,000 km. They are designed to operated with a wider gap. The electrode is platinum-tipped and the body is stainless steel.
- Plenum
-
- A chamber, located between the Throttle body and the runners of an Intake manifold, used to distribute the intake charge evenly and to enhance engine breathing.
- An enclosure containing air or gas at a higher pressure than exists outside.
- The air ducts, air valves and blower assembly inside the dash
- Plenum chamber
-
- A large cast alloy body in an induction system which connects the throttle body or inlet tube to the cylinder head(s) or inlet manifold.
- The air compartment in a car body formed between the scuttle and the bulkhead, providing a basis for the interior air supply
- Chamber or container for moving air or other gas under a slight positive pressure.
- Plexiglas
- A trade name for an Acrylic plastic, made by the Rhom and Haas Co.
- Pliers
- A gripping tool with two hinged arms and serrated jaws.
Also see
- Angle-nose pliers
- Bending pliers
- Combination pliers
- Crimping pliers
- End cutting pliers
- Eyelet pliers
- Flat-nosed pliers
- Flat-nose pliers
- General purpose pliers
- Half-moon slip joint pliers
- Heavy-duty diagonal cutting pliers
- Heavy-duty end cutting pliers
- High leverage diagonal cutting pliers
- High leverage end cutting pliers
- Hose clamp pliers
- Hose clip pliers
- Hose pinch-off pliers
- Internal circlip pliers
- Locking pliers
- Lock ring pliers
- Long-nose pliers
- Long-nose self-grip pliers
- Multigrip pliers
- Parallel action locking pliers
- Piston ring pliers
- Radiator hose shark tooth pliers
- Spark plug pliers
- Thin needle-nose pliers
- Valve shim pliers
- Valve stem seal pliers
- PLL circuitry
- A phase-locked loop circuitry in a radio which locks the station frequencies to ensure utmost frequency stability
- Plow bolt
-
A bolt with a countersunk, flat head, square neck, and unified thread pitch. Used in road graders, scoop shovels and other heavy-duty equipment where a smooth surface is required at the spot of head protrusion
Plow bolt
- Plug
-
- A removable cork or stopper which fills a hole.
- A Spark plug.
- A male electrical connector.
- To seal with a stopper
Also see- Banana Plug
- Blanking plug
- Cold plug
- Drain plug
- Drain plug key
- Drain plug spanner
- Drain plug wrench
- End Plug
- Expansion plug
- Fill plug
- Flame glow plug
- Freeze plug
- Fusible Plug
- Glow plug
- Glow plug indicator
- Glow plug starter switch
- Hot plug
- Level plug
- Magnetic drain plug
- Magnetic plug
- Oil drain plug
- Oil pan drain plug
- Platinum spark plug
- Platinum-Tipped Spark Plugs
- Radiator drain plug
- Resistor spark plug
- RFI suppressed spark plugs
- Rubber plug
- Safety Plug
- Self-regulating sheathed-type glow plug
- Sheathed-type glow plug
- Sooted plug
- Sooty plug
- Spark plug
- Spiral-type glow plug
- Split electrode spark plug
- SR sheathed glow plug
- Surface gap spark plug
- TC Spark Plug
- Thermocouple Spark Plug
- Wading plugs
- Welch plug
- Wire glow plug
- Plug cap
- The device on the end of the high tension wire coming from the coil and mounted on the spark plug. Also called Spark plug cap
- Plug gapping
- Adjusting the side Electrode on a Spark plug to provide the proper Air gap between it and the center Electrode.
- Plug-in diagnosis
- On-board computer provides means for special test equipment to be plugged in for making a series of programmed tests to check condition of various units and systems on the vehicle
- Plug patch
- A tire repair material which is forced into a nail hole to fill it. The plug is attached at one end to a patch that seals the hole and then expands to fill the hole. Although a common procedure, it is not the most satisfactory method of repair
- Plug repair
- The filling of a nail hole by forcing repair material into the damaged area, often while the tire is mounted and containing air. It is not a satisfactory method of repair.
- Plug reversal
- The reconnecting of an electric motor's windings to reverse its direction of rotation while running
- Plug weld
- A weld which holds two pieces of metal together and made in a hole in one of metal which is lapped over the other pieces. Also called rosette weld.
- Plug welding
- A number of holes are punched along the edge of the repair section to be welded in; the section overlaps the damaged area to be repaired and is welded to the base metal at the punched boles. This is a convenient way of duplicating the spot welding process used by manufacturers, as spot welding equipment is usually too expensive and cumbersome for repair purposes
- Plunger
-
- Any immersing type of piston.
- A hydraulic tappet component (e.g., in a valve).
- An actuating element in an ignition lock.
- A piston in a starter solenoid.
Also see
- Plunger principle
- A new ABS control system which offers improved pressure modulation with very small amplitudes even at pressures close to zero. Compare Valve principle
- Plunger suspension
- A suspension system in which the vertical movement of the axle is controlled by springs mounted above and below the axle.
- Plunging joint
- A Slip joint which is a connection in the drive train, of variable length, which permits the drive shaft to change in effective length. The British term is "sliding joint"
- Ply
- A layer of rubber-coated parallel cords which forms a unit of a tire carcass. The plies are made of cord, Fiberglass, steel, or structural fabric.
- Plymouth
-
A vehicle brand of Chrysler of which the Fury for 1956-58 are Milestone cars. The Satellite SS and GTX for 1965-70 are milestone cars. The Barracuda Formula S for 1965-69 are milestone cars. The Roadrunner and Superbird for 1968-70 are milestone cars. Acclaim (1989-95), Breeze (1996-2000), Caravelle (1983-88), Colt (1971-94), Colt Vista (1988-94), Grand Voyager (1974-2000), Gran Fury (1975-77, 1980-89), Horizon (1978-90), Laser (1990-94), Neon (1995-2001), Prowler (1997-2000), Reliant (1981-89), Sundance (1987-94), and Voyager (1974-2000)
Click image for books on
Plymouth
- Ply rating
- (PR) An indication of tire strength and load carrying capacity. It does not necessarily indicate actual number of Plies. A two-ply four-ply rating tire would have the Load capacity of a four-ply tire of the same size but would have only two actual plies. This system of measurement has been replaced by the term Load range.
- Ply separation
- A breakdown of the bonding compounds resulting in the plies detaching from each other. Usually as a result of excessive heat.
- Ply turnup
- The extension of a carcass ply to its end after wrapping around the bead. Also called "flipper strip"